MAX3160E-62E Datasheet by Analog Devices Inc./Maxim Integrated

up to tOMbps in RS-AB‘S/RS-AZZ mode and up to Space thps in RS-232 mode - Eliminates the Need fora Bipolar 3:12V Sup The MAXStGOE/MAX3162E orfer a flow-through pin- ' Enables SW9 Supply Operal'o" From *3V out that facilitates board layout. The MAXStGOE/ +5»5V V°"age Supply MAXStGlE/MAXStGZE are available in tiny SSOP pack- 0 1uA Shutdown Supply Current Saves Power ages and Operate Up to 40°C to +85°C temperature . Allows Up To 256 Transceivers on the Bus ranges Applications Typical Operating Circuit Point-of-Sales Equipment Peripherals industrial Controls Networking RS—232 to RS-ABS Security Systems interface Converters 0000 Pin Configurations appear at end a! data sheer, Seremr Guide appears ai end or data sheer. maxim integratedw
MAX3160E/MAX3161E/MAX3162E ±15kV ESD-Protected, +3.0V to
+5.5V, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
EVALUATION KIT AVAILABLE
General Description
The MAX3160E/MAX3161E/MAX3162E are programma-
ble RS-232/RS-485/RS-422 multiprotocol transceivers.
The MAX3160E/MAX3161E are pin programmable as a
2Tx/2Rx RS-232 interface or a single RS-485/RS-422
transceiver. The MAX3162E is configured as a 2Tx/2Rx
RS-232 interface, and a single RS-485/RS-422 trans-
ceiver simultaneously.
The MAX3160E/MAX3161E/MAX3162E feature
enhanced electrostatic discharge (ESD) protection. All
of the transmitter outputs and receiver inputs are pro-
tected to ±15kV using the Human Body Model.
All devices incorporate a proprietary low-dropout trans-
mitter output stage, and an on-board dual charge
pump to allow RS-232- and RS-485-/RS-422-compliant
performance from a +3V to +5.5V supply. These
devices also feature pin-selectable transmitter slew
rates for RS-232 and RS-485/RS-422 modes. Slew-rate
limiting minimizes EMI and reduces reflections caused
by improperly terminated cables, allowing error-free
data transmission up to 250kbps. Disabling slew-rate
limiting allows these devices to transmit at data rates
up to 10Mbps in RS-485/RS-422 mode and up to
1Mbps in RS-232 mode.
The MAX3160E/MAX3162E offer a flow-through pin-
out that facilitates board layout. The MAX3160E/
MAX3161E/MAX3162E are available in tiny SSOP pack-
ages and operate up to -40°C to +85°C temperature
ranges.
Applications
Point-of-Sales Equipment Peripherals
Industrial Controls Networking
RS-232 to RS-485 Security Systems
Interface Converters
Benefits and Features
Flexible Options for RS-232 and RS-422/485
Operation In One Package
Simultaneous 2Tx/2Rx RS-232 and Half-Duplex
RS-485 Transceiver Operation (MAX3162E)
Pin-Programmable As Either 2Tx/2Rx RS-232 or
Half/Full RS-485 Transceiver (MAX3160E,
MAX3161E)
Integrated Protection Increases Robustness
High ±15kV ESD HBM per JEDEC JS-001-2012
Transmitters and Receivers Protected Against
Wiring Faults
True Fail-Safe Receiver Prevents False Transition
on Receiver Input Short or Open
Short-Circuit Protection Over the Entire Common-
Mode Voltage Range
Thermal Protection from Excessive Power
Dissipation
Slew Rate Limiting Minimizes EM and Reduces
Cable Reflections
Integrated Charge Pump Circuitry Saves Board
Space
Eliminates the Need for a Bipolar ±12V Supply
Enables Single Supply Operation From +3V to
+5.5V Voltage Supply
1µA Shutdown Supply Current Saves Power
Allows Up To 256 Transceivers on the Bus
Typical Operating Circuit
Pin Configurations appear at end of data sheet.
Selector Guide appears at end of data sheet.
TX
VCC
DI/T1IN Z(B)/T1OUT
R1OUT B/R1IN
GND FAST HDPLX SHDN
Y(A)/T2OUT
A/R2IN
CTS
13
10
DE485/T2IN
RTS 11 15 6
RO/R2OUT
RX 12 813
714
910 12
16 5
11
RJ45
DB9
SHDN
µP
SPI
MAX3100
RS-485/RS232
2
MAX3160E
+3V TO +5.5V
4
19-3580; Rev 1; 5/15
Ordering Information appears at end of data sheet.
MAX3160E/MAX3161E/MAX3162E ±15kV ESD-Protected, +3.0V to
+5.5V, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
Maxim Integrated | 2www.maximintegrated.com
Absolute Maximum Ratings
Electrical Characteristics (continued)
(VCC = +3V to +5.5V, C1–C4 = 0.1µF when tested at +3.3V ±10%; C1 = 0.047µF and C2, C3, C4 = 0.33µF when tested at +5V±10%;
TA= TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +3.3V and TA= +25°C.) (Note 2)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Note 1: V+ and V- can have maximum magnitudes of 7V, but their absolute difference cannot exceed 13V.
VCC to GND..............................................................-0.3V to +6V
V+ to GND ................................................................-0.3V to +7V
V- to GND. ................................................................-7V to +0.3V
V+ - V- (Note 1)....................................................................+13V
Input Voltages
T1IN, T2IN, DI, DE485, RE485, TE232, RE232, SHDN,
FAST, HDPLX, RS485/RS232 to GND. .................-0.3V to +6V
A, B, R1IN, R2IN to GND .................................................±25V
Output Voltages
T1OUT, T2OUT, Y, Z to GND (VCC = 0 or
SHDN = GND) ..............................................................±13.2V
T1OUT, T2OUT to GND (VCC = 5.5V and
SHDN = VCC) .....................................................-13.2V to +9V
R2OUT, R1OUT, RO to GND..................-0.3V to (VCC + 0.3V)
Output Short-Circuit Duration
T1OUT, T2OUT, Y, Z ..............................................Continuous
Continuous Power Dissipation (TA= +70°C)
20-Pin SSOP (derate 8.0mW/°C above +70°C) ...........640mW
24-Pin SSOP (derate 8.0mW/°C above +70°C) ...........640mW
28-Pin SSOP (derate 9.1mW/°C above +70°C) ...........727mW
Operating Temperature Ranges
MAX316_CA_......................................................0°C to +70°C
MAX316_EA_ ...................................................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Junction Temperature......................................................+150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
DC CHARACTERISTICS
MAX3160E/MAX3161E, no load,
RS-485/ RS-232 = GND 1.2 2.8
MAX3160E/MAX3161E, no load,
RS-485/ RS-232 = VCC 2.5 5.5
VCC Standby Current ICC
MAX3162E, no load 3 6
mA
VCC Shutdown Current ISHDN
SHDN = GND, receiver inputs open or
grounded 0.01 1 µA
TRANSMITTER AND LOGIC INPUTS (DI, T1IN, T2IN, DE485, RR
RREE
EE44
4488
8855
55, TE232, RR
RREE
EE22
2233
3322
22, FAST, HDPLX, SHDN, RS-485/ RR
RRSS
SS--
--22
2233
3322
22
)
Logic-Input Low VIL 0.8 V
VCC = +3.3V 2.0
Logic-Input High VIH VCC = +5V 2.4 V
Logic-Input Leakage Current IINL ±0.01 ±A
Transmitter Logic Hysteresis VHYS 0.5 V
RS-232 AND RS-485/RS-422 RECEIVER OUTPUTS (R1OUT, R2OUT, RO)
Receiver Output-Voltage Low VOL IOUT = 2.5mA 0.4 V
Receiver Output-Voltage High VOH IOUT = -1.5mA VCC - 0.6 V
Receiver Output Short-Circuit
Current IOSR 0 VO VCC ±20 ±85 mA
Receiver Output Leakage
Current IOZR Receivers disabled ±0.05 ±A
MAX3160E/MAX3161E/MAX3162E ±15kV ESD-Protected, +3.0V to
+5.5V, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
Maxim Integrated | 3www.maximintegrated.com
Electrical Characteristics (continued)
(VCC = +3V to +5.5V, C1–C4 = 0.1µF when tested at +3.3V ±10%; C1 = 0.047µF and C2, C3, C4 = 0.33µF when tested at +5V±10%;
TA= TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +3.3V and TA= +25°C.) (Note 2)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
RS-232 RECEIVER INPUTS (R1IN, R2IN)
Input Voltage Range -25 +25 V
Logic-Input Low 0.8
VCC = +3.3V 2.0
Logic-input High VCC = +5V 2.4 V
Input Hysteresis 0.5 V
VCC = +3.0V to 5.5V 3 5 7
Input Resistance VCC = 0 6 11 16 kΩ
RS-485/RS-422 RECEIVER INPUTS (Note 3)
MAX3160E 48
Input Resistance RIN -7V < VCM < +12V MAX3161E/
MAX3162E 96 kΩ
VCM = +12V 0.25
MAX3160E VCM = -7V -0.15
VCM = +12V 0.125
Input Current IIN
MAX3161E/MAX3162E VCM = -7V -0.075
mA
Input Differential Threshold VTH -7V VCM +12V -200 -50 mV
Input Hysteresis ΔVTH 30 mV
RS-232 TRANSMITTER OUTPUTS (T1OUT, T2OUT)
Output Voltage Swing Both transmitter outputs loaded with 3kΩ
to GND ±5±5.4 V
Output Resistance VCC = V+ = V- = 0, T_OUT = ±2V 300 10M Ω
Output Short-Circuit Current ISC T_OUT = GND ±30 ±60 mA
MAX3160E ±125
MAX3161E ±25
Output Leakage Current IO
VOUT = ±9V
TE232 = GND or SHDN =
GND MAX3162E ±25
µA
RS-485/RS-422 TRANSMITTER OUTPUTS (Y, Z)
R = 27Ω
(RS-485) 1.5
Differential Output Voltage VOD Figure 1
R = 50Ω
(RS-422) 2
V
Change in Magnitude of
Differential Output Voltage for
Complementary Output States
|ΔVOD| R = 27Ω or 50Ω, Figure 1 0.2 V
Common-Mode Output Voltage VOC R = 27Ω or 50Ω, Figure 1 3 V
Change in Magnitude of
Common-Mode Output Voltage
for Complementary Output
States
|ΔVOC| R = 27Ω or 50Ω, Figure 1 0.2 V
MAX3160E/MAX3161E/MAX3162E ±15kV ESD-Protected, +3.0V to
+5.5V, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
Maxim Integrated | 4www.maximintegrated.com
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Output Short-Circuit Current ISC VY or VZ = -7V to +12V ±250 mA
MAX3160E ±125
MAX3161E ±25
Output Leakage Current IO
VY or VZ = -7V or +12V,
DE485 = GND or SHDN =
GND MAX3162E ±25
µA
RS-232 TRANSMITTER TIMING CHARACTERISTICS (SLOW MODE, FAST = GND, 250kbps, one transmitter switching)
Maximum Data Rate RL = 3kΩ, CL = 1000pF 250 kbps
Transmitter Skew tTSKEW RL = 3kΩ, CL = 150pF, Figure 6 25 ns
CL = 150pF
to 1000pF 630
Transition-Region Slew Rate
VCC = +3.3V, TA = +25°C,
RL = 3kΩ to 7kΩ,
measured from +3.0V to
-3.0V or -3.0V to +3.0V
CL = 150pF
to 2500pF 430
V/µs
RS-232 TRANSMITTER TIMING CHARACTERISTICS (FAST MODE, FAST = VCC, 1Mbps, one transmitter switching)
VCC = +3V to +4.5V, RL = 3kΩ, CL = 250pF 1
Maximum Data Rate VCC = +4.5V to +5.5V, RL = 3kΩ,
CL = 1000pF 1Mbps
Transmitter Skew tTSKEW RL = 3kΩ, CL = 150pF, Figure 6 10 ns
MAX3160E 13 150
Transition-Region Slew Rate
VCC = +3.3V, TA = +25°C, RL
= 3kΩ to 7kΩ, CL = 150pF to
1000pF, measured from +3.0V
to -3.0V or -3.0V to +3.0V
MAX3161E
MAX3162E 24 150
V/µs
RS-232 RECEIVER TIMING CHARACTERISTICS
Receiver Propagation Delay tPHL,tPLH R_IN to R_OUT, CL = 15pF, Figure 5 0.15 µs
Receiver Output Enable Time tRZL,tRZH CL = 50pF, Figures 2, 10, MAX3162E 200 ns
Receiver Output Disable Time tRLZ,tRHZ CL = 15pF, Figures 2, 10, MAX3162E 200 ns
Receiver Skew tRSKEW CL = 50pF, Figure 5 100 ns
RS-485/RS-422 DRIVER TIMING CHARACTERISTICS (SLOW MODE, FAST = GND, 250kbps)
Differential Driver Propagation
Delay
tDPHL,
tDPLH RDIFF = 54Ω, CL = 50pF, Figures 3, 7 200 400 800 ns
Differential Driver Rise and Fall
Time
tDR,
tDF RDIFF = 54Ω, CL = 50pF, Figures 3, 7 200 400 800 ns
Differential Driver Propagation
Delay Skew tDSKEW RDIFF = 54Ω, CL = 50pF, Figures 3, 7 200 ns
Driver Output Enable Time tDZH, tDZL CL = 50pF, Figures 4, 8 400 900 ns
Driver Output Disable Time tDLZ, tDHZ CL = 50pF, Figures 4, 8 200 400 ns
Electrical Characteristics (continued)
(VCC = +3V to +5.5V, C1–C4 = 0.1µF when tested at +3.3V ±10%; C1 = 0.047µF and C2, C3, C4 = 0.33µF when tested at +5V±10%;
TA= TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +3.3V and TA= +25°C.) (Note 2)
HA WAH MAXBTEZE‘CL
MAX3160E/MAX3161E/MAX3162E ±15kV ESD-Protected, +3.0V to
+5.5V, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
Maxim Integrated | 5www.maximintegrated.com
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
RS-485/RS-422 DRIVER TIMING CHARACTERISTICS FAST MODE, FAST = VCC, 10Mbps)
Differential Driver Propagation
Delay
tDPHL,
tDPLH RDIFF = 54Ω, CL = 50pF, Figures 3, 7 60 120 ns
Differential Driver Rise and Fall
Times tDR, tDF RDIFF = 54Ω, CL = 50pF, Figures 3, 7 10 25 ns
Differential Driver Propagation
Delay Skew tDSKEW RDIFF = 54Ω, CL = 50pF, Figures 3, 7 10 ns
Driver Output Enable Time tDZH,tDZL CL = 50pF, Figures 4, 8 400 900 ns
Driver Output Disable Time tDHZ,tDLZ CL = 50pF, Figures 4, 8 200 400 ns
RS-485/RS-422 RECEIVER TIMING CHARACTERISTICS
Receiver Propagation Delay tRPLH,
tRPHL CL = 15pF, Figures 9, 11 80 150 ns
Receiver Propagation Delay
Skew tRSKEW CL = 15pF, Figures 9, 11 1 10 ns
Receiver Output Enable Time tRZL, tRZH MAX3162E, CL = 50pF, Figures 2, 10 100 ns
Receiver Output Disable Time tRLZ, tRHZ MAX3162E, CL = 15pF, Figures 2, 10 100 ns
ESD PROTECTION
R_IN, T_OUT, A, B, Y, Z Human Body Model ±15 kV
Electrical Characteristics (continued)
(VCC = +3V to +5.5V, C1–C4 = 0.1µF when tested at +3.3V ±10%; C1 = 0.047µF and C2, C3, C4 = 0.33µF when tested at +5V±10%;
TA= TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +3.3V and TA= +25°C.) (Note 2)
Typical Operating Characteristics
(VCC = +3.3V, 250kbps data rate, CBYPASS, C1, C2, C3, C4 = 0.1µF, all RS-232 transmitters (RS-232 mode) loaded with 3kΩto
ground, TA= +25°C, unless otherwise noted.)
-10.00
-5.00
-7.50
-2.50
5.00
7.50
2.50
0
10.00
0 1000 2000 3000 4000 5000
RS-232 TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE (FAST = GND)
MAX3160E toc01
LOAD CAPACITANCE (pF)
TRANSMITTER OUTPUT VOLTAGE (V)
-10.00
-5.00
-7.50
-2.50
5.00
7.50
2.50
0
10.00
0 500 1000 1500 2000 2500
RS-232 TRANSMITTER OUTPUT VOLTAGE
vs. LOAD CAPACITANCE (FAST = VCC)
MAX3160E toc02
LOAD CAPACITANCE (pF)
TRANSMITTER OUTPUT VOLTAGE (V)
DATA RATE = 1Mbps
0
4
2
8
6
10
12
16
14
18
0 1000 2000 3000 4000 5000
RS-232 TRANSMITTER SLEW RATE
vs. LOAD CAPACITANCE (FAST = GND)
MAX3160E toc03
LOAD CAPACITANCE (pF)
SLEW RATE (V/μs)
RISING
FALLING
Note 2: All currents into the device are positive. All currents out of the device are negative.
Note 3: Applies to A, B for MAX3162E and MAX3160E/MAX3161E with HDPLX = GND, or Y, Z for MAX3160E/MAX3161E with
HDPLX = VCC.
3,: SEE :92 2:: 2:18 5&8 352213.33
MAX3160E/MAX3161E/MAX3162E ±15kV ESD-Protected, +3.0V to
+5.5V, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
Maxim Integrated | 6www.maximintegrated.com
0
50
150
100
200
250
-40 10-15 35 60 85
SHUTDOWN CURRENT
vs. TEMPERATURE
MAX3160E toc07
TEMPERATURE (°C)
SHUTDOWN CURRENT (nA)
0
40
20
80
60
120
100
140
046281012
RS-485/RS-422 OUTPUT CURRENT
vs. DRIVER-OUTPUT LOW VOLTAGE
MAX3160E toc08
OUTPUT LOW VOLTAGE (V)
OUTPUT CURRENT (mA)
0
40
20
80
60
120
100
140
-7 -3 -1-5 135
RS-485/RS-422 OUTPUT CURRENT
vs. DRIVER-OUTPUT LOW VOLTAGE
MAX3160E toc09
OUTPUT LOW VOLTAGE (V)
OUTPUT CURRENT (mA)
0
20
10
40
30
60
50
70
90
80
100
0 1.0 1.50.5 2.0 2.5 3.0 3.5 4.0
RS-485/RS-422 DRIVER OUTPUT CURRENT
vs. DIFFERENTIAL OUTPUT VOLTAGE
MAX3160E toc10
OUTPUT LOW VOLTAGE (V)
OUTPUT CURRENT (mA)
2.0
2.3
2.2
2.1
2.4
2.5
2.6
2.7
2.8
2.9
3.0
-40 10-15 35 60 85
RS-485/RS-422 DRIVER DIFFERENTIAL
OUTPUT vs. TEMPERATURE
MAX3160E toc11
TEMPERATURE (°C)
OUTPUT VOLTAGE (V)
RDIFF = 100Ω
FIGURE 1
0
10
5
20
15
25
30
0 1.5 2.00.5 1.0 2.5 3.0 3.5
RECEIVER OUTPUT CURRENT vs. RECEIVER-
OUTPUT LOW VOLTAGE
MAX3160E toc12
OUTPUT LOW VOLTAGE (V)
OUTPUT CURRENT (mA)
Typical Operating Characteristics (continued)
(VCC = +3.3V, 250kbps data rate, CBYPASS, C1, C2, C3, C4 = 0.1µF, all RS-232 transmitters (RS-232 mode) loaded with 3kΩto
ground, TA= +25°C, unless otherwise noted.)
0
20
10
50
40
30
60
70
100
90
80
110
0 400 800 1200 1600 2000
RS-232 TRANSMITTER SLEW RATE
vs. LOAD CAPACITANCE (FAST = VCC)
MAX3160E toc04
LOAD CAPACITANCE (pF)
SLEW RATE (V/μs)
RISING
FALLING
0
30
20
10
40
50
60
0 20001000 3000 4000 5000
OPERATING SUPPLY CURRENT
vs. LOAD CAPACITANCE WHEN
TRANSMITTING DATA (RS-232 MODE)
MAX3160E to05
LOAD CAPACITANCE (pF)
SUPPLY CURRENT (mA)
DATA RATE =
1Mbps
DATA RATE = 250kbps
DATA RATE = 20kbps
:‘U 45 u 5 E; :2 292.2%: , f : ‘ / ‘ L , 2:33 29,430: i1 muwsmw 4mm
MAX3160E/MAX3161E/MAX3162E ±15kV ESD-Protected, +3.0V to
+5.5V, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
Maxim Integrated | 7www.maximintegrated.com
0
30
20
10
40
50
60
70
80
90
100
-40 10-15 35 60 85
RS-485/RS-422 RECEIVER PROPAGATION
DELAY vs. TEMPERATURE
MAX3160E toc14
TEMPERATURE (°C)
PROPAGATION DELAY (ns)
RISING
FALLING
20
30
25
40
35
45
50
-40 10-15 35 60 85
RS-485/RS-422 DRIVER PROPAGATION DELAY
vs. TEMPERATURE (FAST = VCC)
MAX3160E toc15
TEMPERATURE (°C)
PROPAGATION DELAY (ns)
CL = 50pF
RDIFF = 54Ω
DATA RATE = 10Mbps
FALLING
RISING
100
200
150
300
250
350
400
-40 10-15 35 60 85
RS-485/RS-422 DRIVER PROPAGATION DELAY
vs. TEMPERATURE (FAST = GND)
MAX3160E toc16
TEMPERATURE (°C)
PROPAGATION DELAY (ns)
CL = 50pF
RDIFF = 54Ω
DATA RATE = 250kbps
FALLING
RISING
20ns/div
RS-485/RS-422 DRIVER PROPAGATION
(FAST = VCC, 10Mbps)
VY - VZ
2V/div
DI
2V/div
MAX3160E toc17
CL = 50pF
RDIFF = 54Ω
1.0μs/div
RS-485/RS-422 DRIVER PROPAGATION
(FAST = GND, 250kbps)
VY - VZ
2V/div
DI
2V/div
MAX3160E toc18
CL = 50pF
RDIFF = 54Ω
4ns/div
RS-485/RS-422 RECEIVER PROPAGATION
(FAST = VCC, 5Mbps)
VY - VZ
2V/div
RO
2V/div
MAX3160E toc20
CL = 15pF
100ns/div
RS-485/RS-422 RECEIVER PROPAGATION
(FAST = VCC, 5Mbps)
VY - VZ
2V/div
MAX3160E toc21
CL = 50pF
RDIFF = 54Ω
DE485
2V/div
0
4
2
8
6
12
10
14
0 1.0 1.50.5 2.0 2.5 3.0 3.5
RECEIVER OUTPUT CURRENT
vs. RECEIVER-OUTPUT HIGH VOLTAGE
MAX3160E toc13
OUTPUT-HIGH VOLTAGE (V)
OUTPUT CURRENT (mA)
Typical Operating Characteristics (continued)
(VCC = +3.3V, 250kbps data rate, CBYPASS, C1, C2, C3, C4 = 0.1µF, all RS-232 transmitters (RS-232 mode) loaded with 3kΩto
ground, TA= +25°C, unless otherwise noted.)
-1000
-800
-400
-600
0
200
-200
400
-20 -10 -5-15 0 5 101520
I-V OUTPUT IMPEDANCE CURVE
IN RS-232 SHUTDOWN MODE
MAX3160E toc19
OUTPUT VOLTAGE (V)
OUTPUT CURRENT (μA)
‘ 0»:de ‘ 0»:de ‘ spam ‘ 0215de
MAX3160E/MAX3161E/MAX3162E ±15kV ESD-Protected, +3.0V to
+5.5V, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
Maxim Integrated | 8www.maximintegrated.com
1.0μs/div
MAX3160E
RS-232 TRANSMITTER PROPAGATION
(FAST = GND, 250kbps)
T_OUT
5V/div
MAX3160E toc22
CL = 1000pF
RL = 7kΩ
DI
2V/div
1.0μs/div
MAX3160E
RS-232 TRANSMITTER PROPAGATION
(FAST = VCC, 250kbps)
T_OUT
5V/div
MAX3160E toc23
CL = 150pF
RL = 7kΩ
DI
2V/div
1.0μs/div
MAX3161E/MAX3162E
RS-232 TRANSMITTER PROPAGATION
(FAST = GND, 250kbps)
T_OUT
5V/div
MAX3160E toc24
CL = 1000pF
RL = 7kΩ
DI
2V/div
1.0μs/div
MAX3161E/MAX3162E
RS-232 TRANSMITTER PROPAGATION
(FAST = VCC, 250kbps)
T_OUT
5V/div
MAX3160E toc25
CL = 150pF
RL = 7kΩ
DI
2V/div
-10.00
-5.00
-7.50
0
-2.50
2.50
5.00
7.50
10.00
2.0 3.0 3.52.5 4.0 4.5 5.0 5.5 6.0
TRANSMITTER OUTPUT VOLTAGE
vs. SUPPLY VOLTAGE (FAST = GND)
MAX3160E toc26
SUPPLY VOLTAGE (V)
TRANSMITTER OUTPUT VOLTAGE (V)
INPUTS AT VCC AND GND
2 TRANSMITTERS LOADED WITH 3kΩ
0
2
4
6
8
10
12
2.0 3.02.5 3.5 4.0 4.5 5.0 5.5 6.0
SUPPLY CURRENT vs. SUPPLY VOLTAGE
WITH RS-232 RUNNING (FAST = GND)
MAX3160E toc27
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
CL = 50pF
RL = 3kΩ
1 TRANSMITTER AT 250kbps
Typical Operating Characteristics (continued)
(VCC = +3.3V, 250kbps data rate, CBYPASS, C1, C2, C3, C4 = 0.1µF, all RS-232 transmitters (RS-232 mode) loaded with 3kΩto
ground, TA= +25°C, unless otherwise noted.)
MAX3160E/MAX3161E/MAX3162E ±15kV ESD-Protected, +3.0V to
+5.5V, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
Maxim Integrated | 9www.maximintegrated.com
Pin Description
PIN
MAX3160E MAX3161E MAX3162E NAME FUNCTION
1 1 1 C1+ Positive Terminal of the Positive Flying Capacitor
222V
CC Positive Supply Voltage
3 3 3 C1- Negative Terminal of the Positive Flying Capacitor
4 4 4 GND Ground
5 5 T1OUT RS-232 Driver Output
5 — Z(B)/T1OUT
Inverting RS-485/RS-422 Driver Output in Full-Duplex Mode
(and Inverting RS-485/RS-422 Receiver Input in Half-Duplex
Mode)/RS-232 Driver Output
6 Z Inverting RS-485/RS-422 Driver Output
6 — Z(B)
Inverting RS-485/RS-422 Driver Output in Full-Duplex Mode
(and Inverting RS-485/RS-422 Receiver Input in Half-Duplex
Mode)
6 — Y(A)/T2OUT
Noninverting RS-485/RS-422 Driver Output in Full-Duplex
Mode (and Noninverting RS-485/RS-422 Receiver Input in
Half-Duplex Mode)/RS-232 Driver Output
7 Y Noninverting RS-485/RS-422 Driver Output
7 — Y(A)
Noninverting RS-485/RS-422 Driver Output in Full-Duplex
Mode (and Noninverting RS-485/RS-422 Receiver Input in
Half-Duplex Mode)
7 9 9 R1OUT RS-232 Receiver Output
8 8 T2OUT RS-232 Driver Output
8 10 RO/R2OUT RS-485/RS-422 Receiver Output/RS-232 Receiver Output
91113SHDN Active-Low Shutdown-Control Input. Drive SHDN low to shut
down transmitters and charge pump.
10 R2OUT RS-232 Driver Output
10 12 14 FAST
Transmitter Speed-Select Input. Select slew-rate limiting for
RS-232 and RS-485/RS-422. Slew-rate limits with a logic-level
low.
11 RO RS-485/RS-422 Receiver Output
11 13 RS - 485/RS - 232
Pin-Selectable Mode Functionality Input. Operates as
RS-485/RS-422 with a logic-level high; operates as RS-232
with a logic-level low.
——12RE485 RS-485/RS-422 Receiver Enable Input. Logic-level low enables
RS-485/RS-422 receivers.
12 14 — HDPLX
Pin-Selectable Mode Functionality Input. Operates in full-
duplex mode when low; operates in half-duplex mode when
high.
MAX3160E/MAX3161E/MAX3162E ±15kV ESD-Protected, +3.0V to
+5.5V, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
Maxim Integrated | 10www.maximintegrated.com
Pin Description (continued)
PIN
MAX3160E MAX3161E MAX3162E NAME FUNCTION
13 A/R2IN Noninverting RS-485/RS-422 Receiver Input/RS-232 Receiver
Input
14 B/R1IN Inverting RS-485/RS-422 Receiver Input/RS-232 Receiver Input
——15RE232 RS-232 Receiver Enable. Logic-level low enables
RS-232 receivers.
15 17 A Noninverting RS-485/RS-422 Receiver Input
15 19 DE485/T2IN RS-485/RS-422 Driver Enable/RS-232 Driver Input
16 TE232 RS-232 Transmitter Output Enable
16 18 B Inverting RS-485/RS-422 Receiver Input
16 20 DI/T1IN RS-485/RS-422 Driver Input/RS-232 Driver Input
17 19 R2IN RS-232 Receiver Input
17 21 25 V- Negative Charge-Pump Rail
18 20 R1IN RS-232 Receiver Input
18 22 26 C2- Negative Terminal of the Negative Flying Capacitor
19 23 27 C2+ Positive Terminal of the Negative Flying Capacitor
20 24 28 V+ Positive Charge-Pump Rail
21 T2IN RS-232 Driver Input
22 DE485 RS-485/RS-422 Driver Enable Input
23 DI RS-485/RS-422 Driver Input
24 T1IN RS-232 Driver Input
f 5 Rsrzaz \ owns“ L mews ‘ uwms L mass/Rs a [ RSV-3854‘ uuwms ‘ H Rsrma'fis www mammlegralea com Max
MAX3160E/MAX3161E/MAX3162E ±15kV ESD-Protected, +3.0V to
+5.5V, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
Maxim Integrated | 11www.maximintegrated.com
20
19
18
17
16
15
14
13
1
2
3
4
RS-485
OUTPUTS
LOGIC
INPUTS
LOGIC
OUTPUT
RS-485
INPUTS
SHDN
FAST RS-485/RS-232
HDPLX
5
6
7
8
V+
C2+
C2-
V-
C1-
GND
VCC
VCC
C1+
C1
CBYPASS
C2
C3
C4
12
11
9
10
CHARGE
PUMP
Z
Y
B
DE485
A
RS-485 MODE
D
LOGIC
INPUT
R
R0
ESD
PROTECTION
ESD
PROTECTION
MAX3160E
20
19
18
17
16
15
14
13
1
2
3
4
RS-232
OUTPUTS LOGIC
INPUTS
LOGIC
OUTPUTS RS-232
INPUTS
C1 C3
C2
C4
SHDN HDPLX
FAST RS-485/RS-232
5
6
7
8
129
V+
C2+
C2-
V-
C1-
GND
VCC
VCC
C1+
CHARGE
PUMP
T1
T2
R1
R2
CBYPASS
RS-232 MODE
1110
ESD
PROTECTION
ESD
PROTECTION
MAX3160E
MAX3160E Functional Diagram
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MAX3160E/MAX3161E/MAX3162E ±15kV ESD-Protected, +3.0V to
+5.5V, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
Maxim Integrated | 12www.maximintegrated.com
MAX3161E Functional Diagram
C1
CBYPASS
C3
C2
C4
24
23
22
21
20
19
16
15
1
2
3
4
RS-485
OUTPUTS
LOGIC
INPUTS
LOGIC
OUTPUT
RS-485
INPUTS
LOGIC
INPUT
SHDN
FAST RS-485/RS-232
HDPLX
5
6
9
10
18
17
7
8
V+
C2+
C2-
V-
C1-
GND
VCC
VCC
C1+
14
13
11
12
CHARGE
PUMP
Z
Y
B
DE485
A
RS-485 MODE
D
R
R0
ESD
PROTECTION
ESD
PROTECTION
MAX3161E
24
23
22
21
20
19
18
17
1
2
3
4
RS-232
OUTPUT LOGIC
INPUTS
LOGIC
OUTPUTS
RS-232
INPUTS
C1 C3
C2
C4
SHDN HDPLX
FAST RS-485/RS-232
5
6
7
8
169
V+
C2+
C2-
V-
C1-
GND
VCC
VCC
C1+
14
13
11
12
CHARGE
PUMP
T1
T2
R1
R2
CBYPASS
RS-232 MODE
1510
ESD
PROTECTION
RS-232
OUTPUT
ESD
PROTECTION
MAX3161E
R9232 UUTPUT r R8485; DUTPUTS ‘ k R9232 UUTPUT f \ mom OUTPUTS \AAVA R0 was xAVAI mm H FAST VVAI www mammlegralea com
MAX3160E/MAX3161E/MAX3162E ±15kV ESD-Protected, +3.0V to
+5.5V, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
Maxim Integrated | 13www.maximintegrated.com
TE232
RE485
R
B
A
Z
Y
RO
28
27
26
25
24
23
22
211
1
2
3
4
RS-485
OUTPUTS
RS-232
OUTPUT
RS-232
OUTPUT
LOGIC
OUTPUTS
LOGIC
INPUT
RS-232
INPUTS
C1 C3
C2
C4
SHDN
FAST
5
6
7
8
V+
C2+
C2-
V-
C1-
GND
VCC
VCC C1+
16
15
13
14
CHARGE
PUMP
T1
T2
R1
R2
20
19
18
17
LOGIC
INPUTS
RS-485
INPUTS
9
10
11
12
LOGIC
INPUTS
DDE485
CBYPASS
ESD
PROTECTION
ESD
PROTECTION
RE-232
MAX3162E
MAX3162E Functional Diagram
CL
RDIFF
VOD
Z
3V
DE485
Y
DI
CL
VCC
OUTPUT
UNDER TEST
S1
S2
500Ω
Figure 3. RS-485/RS-422 Driver Timing Test Circuit
Figure 4. RS-485/RS-422 Driver Enable/Disable Timing Test Load
1k
CL
VCC
TEST POINT
RECEIVER
OUTPUT S1
1kΩ
S2
Figure 2. RS-485/RS-422 and RS-232 Receiver Enable/Disable
Timing Test Load
Figure 1. RS-485/RS-422 Driver DC Test Load
Test Circuits
VOD
VOC
R
R
Z
Y
7% A; Ni + + ++
MAX3160E/MAX3161E/MAX3162E ±15kV ESD-Protected, +3.0V to
+5.5V, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
Maxim Integrated | 14www.maximintegrated.com
tPHL tPLH
50%
VCC
1.5V
+3V
1.5V
INPUT
OUTPUT
0V
50%
GND
tRSKEW = | tPLH - tPHL |
Figure 5. RS-232 Receiver Propagation-Delay Timing
INPUT
OUTPUT
+3V
1.5V 1.5V
V+
0V
V-
0V
tPLH tPHL
tSKEW = | tPLH - tPHL |
Figure 6. RS-232 Transmitter Propagation-delay Timing
DI
3V
0
Z
Y
VO
0
-VO
VO
1.5V
tDPLH
1/2 VO
10%
tDR
90% 90%
tDPHL
1.5V
1/2 VO
10%
tDF
VDIFF = Vy - Vz
VDIFF
tDSKEW = | tDPLH - tDPHL |
OUTPUT NORMALLY LOW
OUTPUT NORMALLY HIGH
3V
0
Y, Z
VOL
Y, Z
0
1.5V 1.5V
VOL + 0.5V
VOH - 0.5V
2.3V
2.3V
tDZL tDLZ
tDZH tDHZ
DE485
Figure 7. RS-485/RS-422 Driver Propagation Delays Figure 8. RS-485/RS-422 Driver Enable and Disable Times
VOH
VOL
A
B
1V
-1V
VCC/2 VCC/2
OUTPUT
INPUT
RO
tRPLH
tRPHL
tRSKEW = | tRPLH - tRPHL |
VID
CL
A
B
RRO
Figure 9. RS-485/RS-422 Receiver Propagation Delays
Figure 11. RS-485/RS-422 Receiver Propagation Delays Test
Circuit
OUTPUT NORMALLY LOW
OUTPUT NORMALLY HIGH
3V
0
VCC
RO
RO
0
1.5V 1.5V
VOL + 0.5V
VOH - 0.5V
1.5V
1.5V
tRZL tRLZ
tRZH tRHZ
RE232 OR RE485
Figure 10. MAX3162 RS-485/RS-422 and RS-232 Receiver
Enable and Disable Times
MAX3160E/MAX3161E/MAX3162E ±15kV ESD-Protected, +3.0V to
+5.5V, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
Maxim Integrated | 15www.maximintegrated.com
Detailed Description
The MAX3160E/MAX3161E/MAX3162E +3V to +5.5V,
multiprotocol transceivers can be pin-configured in a
number of RS-232 and RS-485/RE-422 interface combi-
nations. These circuit configurations are ideal for the
design of RS-232 to RS-485 converters, multiprotocol
buses, or any application that requires both RS-232 and
RS-485 transceivers. The slew rate of these devices is
on-the-fly pin selectable, allowing reduced EMI data
rates, or up to 10Mbps RS-485 communications. Power
consumption can be reduced to 10nA by using the
shutdown function, but the RS-232 receivers remain
active allowing other devices to query the interface con-
troller. A flow-through pinout and the space-saving
SSOP packages (available in commercial and extended
temperature ranges) facilitate board layout.
Device Selection
The MAX3160E/MAX3161E/MAX3162E contain RS-232
transceivers and an RS-485/RS-422 transceiver. The
primary difference between the devices is the multi-
plexing of the I/O ports.
The MAX3160E has common transmitter outputs and
receiver inputs for its RS-232 and RS-485/RS-422 trans-
ceivers, and common digital I/O ports. The MAX3160E
is optimized for multiprotocol operation on a single
interface bus and comes in a 20-pin SSOP package.
The MAX3161E has separate transmitter outputs and
receiver inputs for its RS-232 and RS-485/RS-422 trans-
ceivers, and common digital I/O ports. The MAX3161E is
optimized for multiplexing a single UART across two inter-
face buses and is available in a 24-pin SSOP package.
The MAX3162E has separate transmitter outputs and
receiver inputs for its RS-232 and RS-485/RS-422 trans-
ceivers, and separate digital I/O ports. The MAX3162E
is optimized for protocol translation between two inter-
face buses and comes in a 28-pin SSOP package.
See Tables 1–12, the
Functional Diagrams
, and the fol-
lowing descriptions for details on each device.
MAX3160E
The MAX3160E is a 2TX/2RXRS-232 transceiver in
RS-232 mode, capable of RS-232-compliant communi-
cation. Assertion of RS-485/RS-232 converts the device
to a single RS-485 transceiver by multiplexing the RS-
232 I/O ports to an RS-485 driver and receiver pair. The
logic inputs now control the driver input and the driver
enable. One logic output carries the RS-485 receiver out-
put, and the other is tri-stated. The receiver input imped-
ance is dependent on the device mode and is 1/4-unit
load for RS-485 operation and 5kΩfor RS-232 operation.
MAX3161E
The MAX3161E is a 2TX/2RXRS-232 transceiver in
RS-232 mode or a single RS-485/RS-422 transceiver in
RS-485 mode. When in RS-485 mode, the unused RS-
232 transmitter and receiver outputs are disabled. When
in RS-232 mode, the RS-485 transmitter outputs are dis-
abled and the RS-232 receiver inputs are 5kΩto GND.
The RS-485 receiver inputs are always 1/8-unit load.
Logic lines are shared between the two protocols and are
used for signal inputs and as an RS-485 driver enable.
MAX3162E
The MAX3162E is a 2Tx/2Rx RS-232 transceiver and a
single RS-485/RS-422 transceiver simultaneously. All
drivers, receivers, and transmitters can be enabled or
disabled by pin selection. All outputs are high-imped-
ance when not activated. RS-232 receiver inputs are
5kΩwhen enabled, and RS-485 receiver inputs are
1/8-unit load.
Fast-Mode Operation
The FAST control input is used to select the slew-rate
limiting of the RS-232 transmitters and the RS-485/
RS-422 drivers. With FAST unasserted, the RS-232
transmitters and the RS-485/RS-422 driver are slew-rate
limited to reduce EMI. RS-232 data rates up to 1Mbps
and RS-485/RS-422 data rates up to 10Mbps are possi-
ble when FAST is asserted. FAST can be changed dur-
ing operation without interrupting data communications.
Half-Duplex RS-485/RS-422 Operation
Asserting HDPLX places the MAX3160E/MAX3161E in
half-duplex mode. The RS-485 receiver inputs are inter-
nally connected to the driver outputs. To receive
RS-485 data, disable the RS-485 outputs by driving
DE485 low. HDPLX has no affect on RS-232 operation.
Low-Power Shutdown
The MAX3160E/MAX3161E/MAX3162E have an active-
low shutdown control input, SHDN. When SHDN is dri-
ven low, the charge pump and transmitters are shut
down and supply current is reduced to 10nA. The
RS-232 receiver outputs remain active if in RS-232
mode. The charge-pump capacitors must be
recharged when coming out of shutdown before resum-
ing operation in either RS-232 or RS-485/RS-422 mode
(Figure 12).
Dual Charge-Pump Voltage Converter
The MAX3160E/MAX3161E/MAX3162E’s internal power
supply consists of a regulated dual charge pump that
provides output voltages of +5.5V (doubling charge
pump), and -5.5V (inverting charge pump), for input
voltages (VCC) over the +3.0V to +5.5V range. The
charge pumps operate in a discontinuous mode. If the
MAX3160E/MAX3161E/MAX3162E ±15kV ESD-Protected, +3.0V to
+5.5V, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
Maxim Integrated | 16www.maximintegrated.com
magnitude of either output voltage is less than +5.5V,
the charge pumps are enabled. If the magnitude of
both output voltages exceeds +5.5V, the charge
pumps are disabled. Each charge pump requires a fly-
ing capacitor (C1, C2) and a reservoir capacitor (C3,
C4) to generate the V+ and V- supplies (see the
Functional Diagrams).
RS-485/RS-422 Transceivers
The MAX3160E/MAX3161E/MAX3162E RS-485/RS-422
transceivers feature fail-safe circuitry that guarantees a
logic-high receiver output when the receiver inputs are
open or shorted, or when they are connected to a ter-
minated transmission line with all drivers disabled (see
the
Fail-Safe
Section). The MAX3160E/MAX3161E/
MAX3162E also feature pin-selectable reduced slew-
rate drivers that minimize EMI and reduce reflections
caused by improperly terminated cables, allowing
error-free data transmission up to 250kbps The trans-
mitters can operate at speeds up to 10Mbps with the
slew-rate limiting disabled. Drivers are short-circuit cur-
rent limited and thermally limited to protect them
against excessive power dissipation. Half-duplex com-
munication is enabled by driving HDPLX high
(MAX3160E/MAX3161E.)
Fail-Safe
The MAX3160E/MAX3161E/MAX3162E guarantee a
logic-high RS-485 receiver output when the receiver
inputs are shorted or open, or when they are connected
to a terminated transmission line with all drivers dis-
abled. This is done by having the receiver threshold
between -50mV and -200mV. If the differential receiver
input voltage (A-B) is greater than or equal to -50mV,
RO is logic-high. If A-B is less than or equal to -200mV,
RO is logic-low. In the case of a terminated bus with all
transmitters disabled, the receiver’s differential input
voltage is pulled to 0 by the termination. This results in
a logic-high with a 50mV minimum noise margin.
RS-232 Transceivers
The MAX3160E/MAX3161E/MAX3162E RS-232 trans-
mitters are inverting-level translators that convert
CMOS-logic levels to ±5V EIA/TIA-232-compliant lev-
els. The transmitters are guaranteed at a 250kbps data
rate in slew-rate limited mode (FAST = GND) with
worst-case loads of 3kΩin parallel with 1000pF. Data
rates up to 1Mbps can be achieved by asserting FAST.
When powered down or in shutdown, the MAX3160E/
MAX3161E/MAX3162E outputs are high impedance
and can be driven to ±13.2V. The transmitter inputs do
not have pullup resistors. Connect unused inputs to
ground or VCC.
The receivers convert RS-232 signals to CMOS-logic out-
put levels. All receivers have inverting outputs that
remain active in shutdown. The MAX3160E/MAX3161E/
MAX3162E permit their receiver inputs to be driven to
±25V. Floating receiver input signals are pulled to
ground through internal 5kΩresistors, forcing the out-
puts to a logic-high. The MAX3162E has transmitter and
receiver enable pins that allow its outputs to be tri-stated.
±15kV ESD Protection
As with all Maxim devices, ESD-protection structures are
incorporated on all pins to protect against ESD encoun-
tered during handling and assembly. The MAX3160E
/MAX3161E/MAX3162E receiver inputs and transmitter
outputs have extra protection against static electricity
found in normal operation. Maxim’s engineers developed
state-of-the-art structures to protect these pins against
±15kV ESD, without damage. After an ESD event, the
MAX3160E/MAX3161E/MAX3162E continue working
without latchup.
The receiver inputs and transmitter outputs are charac-
terized for ±15kV ESD protection using the Human
Body Model
ESD Test Conditions
ESD performance depends on a number of conditions.
Contact Maxim for a reliability report that documents
test setup, methodology, and results.
Human Body Model
Figure 13a shows the Human Body Model, and Figure
13b shows the current waveform it generates when dis-
charged into a low impedance. This model consists of
a 100pF capacitor charged to the ESD voltage of inter-
est, which is then discharged into the device through a
1.5kΩresistor.
uranium. Afllrsidiv Figure 72 H5232 Transmitter Outputs when Exiting Shutdown Machine Model The Machine Model for ESD testing uses a ZOOpF stor- age capacitor and zero-discharge resistance. lt mimics the stress caused by handling during manufacturing and assembly Of course, all pins (not iust RS-ASS inputs) require this protection during manufacturing Therefore the Machine Model is less relevant to the I/O ports than are the Human Body Model and IEC 1000-4-2 Applications Information Capacitor Selection The capacitor type used for Ct—CA is not critical for proper operation‘ polarized or nonpolarized capacitors can be used Ceramic chip capacitors with an X7R dielectric provide the best combination of performance cost, and size. The charge pump requires 0.1uF capacitors for 3.3\/ operation For other supply volt- ages, see Table 13 for required capacitor values. Do not use values smaller than those listed in Table 13 Increasing the capacitor values reduces ripple on the transmitter outputs and slightly reduces power con- sumption. (32‘ (33 and (34 can be changed without changing Ct‘s value. However, do not increase C1 without also increasing the values of 02, 03, c4, and CBVPASS to maintain the proper ratios to the other capacitors. When using the minimum required capacitor values make sure the capacitance value does not degrade excessively with temperature or voltage This is typical of Y5V and Z5U dielectric ceramic capacitors if in doubt, use capacitors With a larger nominal value The capacitor‘s equivalent series resistance (ESRi which wwwmaximintegratedcom usually rises at low temperatures‘ influences th amount of ripple on V+ and V-. Power-Supply Decoupling ln applications that are sensitive to power-supply noise decouple VCC to ground with a capacitor of the sam value as reservoir capacitors (32‘ ca, and CA Connec the bypass capacitor as close to the IC as possible Maxim Inlegrated i t
MAX3160E/MAX3161E/MAX3162E ±15kV ESD-Protected, +3.0V to
+5.5V, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
Maxim Integrated | 17www.maximintegrated.com
Machine Model
The Machine Model for ESD testing uses a 200pF stor-
age capacitor and zero-discharge resistance. It mimics
the stress caused by handling during manufacturing and
assembly. Of course, all pins (not just RS-485 inputs)
require this protection during manufacturing. Therefore,
the Machine Model is less relevant to the I/O ports than
are the Human Body Model and IEC 1000-4-2.
Applications Information
Capacitor Selection
The capacitor type used for C1–C4 is not critical for
proper operation; polarized or nonpolarized capacitors
can be used. Ceramic chip capacitors with an X7R
dielectric provide the best combination of performance,
cost, and size. The charge pump requires 0.1µF
capacitors for 3.3V operation. For other supply volt-
ages, see Table 13 for required capacitor values. Do
not use values smaller than those listed in Table 13.
Increasing the capacitor values reduces ripple on the
transmitter outputs and slightly reduces power con-
sumption. C2, C3, and C4 can be changed without
changing C1’s value. However, do not increase C1
without also increasing the values of C2, C3, C4,
and CBYPASS to maintain the proper ratios to the
other capacitors.
When using the minimum required capacitor values,
make sure the capacitance value does not degrade
excessively with temperature or voltage. This is typical
of Y5V and Z5U dielectric ceramic capacitors. If in
doubt, use capacitors with a larger nominal value. The
capacitor’s equivalent series resistance (ESR), which
usually rises at low temperatures, influences the
amount of ripple on V+ and V-.
Power-Supply Decoupling
In applications that are sensitive to power-supply noise,
decouple VCC to ground with a capacitor of the same
value as reservoir capacitors C2, C3, and C4. Connect
the bypass capacitor as close to the IC as possible.
40μs/div
SHDN
5V/div
T1OUT
2V/div
GND
T2OUT
2V/div
Figure 12. RS-232 Transmitter Outputs when Exiting Shutdown
CHARGE-CURRENT
LIMIT RESISTOR
DISCHARGE
RESISTANCE
STORAGE
CAPACITOR
Cs
100pF
RC
1MΩ
RD
1.5kΩ
HIGH-
VOLTAGE
DC
SOURCE
DEVICE
UNDER
TEST
Figure 13a. Human Body ESD Test Model
IP 100%
90%
36.8%
tRL TIME
tDL
CURRENT WAVEFORM
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
Ir
10%
0
0
AMPERES
Figure 13b. Human Body Model Current Waveform
ed transmitter driven at 250kbps (FAST : GND) into an RS-232 load in parallel with 1000pF. Figure t7 shows a single transmitter driven at 1Mbps (FAST asserted), loaded with an RS—232 receiver in parallel With tOOOpF. These transceivers maintain the RS—232 :5V minimum transmitter output voltage at data rates up to 1Mbps. 256 Transceivers on the Bus The standard RS-485 receiver input impedance is 12k§2 (one-unit load), and the standard driver can drive up to 32-unit loads. The MAXStGOE has a i/A-unit load receiver input impedance (48kg), alIOWing up to 128 transceivers to be connected in parallel on one com- munication line. The MAX31GTE/MAX3162E have a 1/8- unit load receiver input impedance (QGKQT allowing up to 256 transceivers to be connected in parallel on one communication line Any combination of these devices and/or other RS—485 transceivers With a total of 32-unit loads or fewer can be connected to the line RS-485IRS-422 Driver Output Protection Two mechanisms prevent excessive output current and power dissipation caused by faults or by bus con- tention. The flrSl‘ a foldback current limit on the output stage provides immediate protection against short cir- cuits over the whole common-mode voltage range (see the Typica/ Operating Characterlsti'cs). The second‘ a thermal shutdown circuit‘ forces the driver outputs into a high-impedance state if the die temperature becomes excessive typically over +150°C. Protection Against Wiring Faults EIA/TIA-ABS standards require a common input voltage range of -7V to +12V to prevent damage to the device. wwwmaximlntegratemcom Eiih Ph g: H: flu .th The MAX31GOE/MAX31GTE/MAX3162E tected to RS-232 levels of :25V for the and :tSV for the transmitter/driver ou vides additional protection for the RS- against ground differential or faults due RS-485IRS-422 Reduced EMI and Reflections The MAX31GOE/MAX3181E/MAX3162E ured for slew-rate limiting by pulling FAS mizes EMI and reduces reflections caus terminated cables Operation in slew-r reduces the amplitudes of high-frequenc RS-485/RS-422 Line Length vs. The RS—485/RS-422 standard covers li 4000ft For line lengths greater than repeater application shown in Figure 17 RS-2321R8-485 Protocol Transl Figure 18 shows the MAX3162E co RS-232/RS-485 protocol translator. T translation is controlled through the RT The single-ended RS-232 receiver inpu lated to a differential RS-485 tran Similarly, a differential RS-485 receive translated to a single-ended RS-232 tr RS-232 data received on RgiN is trans 485 signal on Z and Y RS—485 signal and B are transmitted as an RS—232 sig
MAX3160E/MAX3161E/MAX3162E ±15kV ESD-Protected, +3.0V to
+5.5V, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
Maxim Integrated | 18www.maximintegrated.com
RS-232 Transmitter Outputs
when Exiting Shutdown
Figure 12 shows two transmitter outputs when exiting
shutdown mode. As they become active, the two trans-
mitter outputs are shown going to opposite RS-232 lev-
els (one transmitter input is high, the other is low). Each
transmitter is loaded with 3kΩin parallel with 1000pF.
The transmitter outputs display no ringing or undesir-
able transients as they come out of shutdown. Note that
the transmitters are enabled only when V- exceeds
approximately -3V.
High Data Rates
The MAX3160E/MAX3161E/MAX3162E maintain the
RS-232 ±5V required minimum transmitter output voltage
even at high data rates. Figure 14 shows a transmitter
loopback test circuit. Figure 15 shows a loopback test
result at 250kbps, and Figure 16 shows the same test at
1Mbps. Figure 15 demonstrates a single slew-rate limit-
ed transmitter driven at 250kbps (FAST = GND) into an
RS-232 load in parallel with 1000pF. Figure 17 shows a
single transmitter driven at 1Mbps (FAST asserted),
loaded with an RS-232 receiver in parallel with 1000pF.
These transceivers maintain the RS-232 ±5V minimum
transmitter output voltage at data rates up to 1Mbps.
256 Transceivers on the Bus
The standard RS-485 receiver input impedance is 12kΩ
(one-unit load), and the standard driver can drive up to
32-unit loads. The MAX3160E has a 1/4-unit load
receiver input impedance (48kΩ), allowing up to 128
transceivers to be connected in parallel on one com-
munication line. The MAX3161E/MAX3162E have a 1/8-
unit load receiver input impedance (96kΩ), allowing up
to 256 transceivers to be connected in parallel on one
communication line. Any combination of these devices
and/or other RS-485 transceivers with a total of 32-unit
loads or fewer can be connected to the line.
RS-485/RS-422
Driver Output Protection
Two mechanisms prevent excessive output current and
power dissipation caused by faults or by bus con-
tention. The first, a foldback current limit on the output
stage, provides immediate protection against short cir-
cuits over the whole common-mode voltage range (see
the
Typical Operating Characteristics
). The second, a
thermal shutdown circuit, forces the driver outputs into
a high-impedance state if the die temperature becomes
excessive, typically over +150°C.
Protection Against Wiring Faults
EIA/TIA-485 standards require a common input voltage
range of -7V to +12V to prevent damage to the device.
The MAX3160E/MAX3161E/MAX3162E inputs are pro-
tected to RS-232 levels of ±25V for the receiver inputs
and ±13V for the transmitter/driver outputs. This pro-
vides additional protection for the RS-485 transceivers
against ground differential or faults due to miswiring.
RS-485/RS-422 Reduced
EMI and Reflections
The MAX3160E/MAX3161E/MAX3162E can be config-
ured for slew-rate limiting by pulling FAST low. This mini-
mizes EMI and reduces reflections caused by improperly
terminated cables. Operation in slew-rate limited mode
reduces the amplitudes of high-frequency harmonics.
RS-485/RS-422 Line Length vs. Data Length
The RS-485/RS-422 standard covers line lengths up to
4000ft. For line lengths greater than 4000ft, use the
repeater application shown in Figure 17.
RS-232/RS-485 Protocol Translator
Figure 18 shows the MAX3162E configured as an
RS-232/RS-485 protocol translator. The direction of
translation is controlled through the RTS signal (R1IN).
The single-ended RS-232 receiver input signal is trans-
lated to a differential RS-485 transmitter output.
Similarly, a differential RS-485 receiver input signal is
translated to a single-ended RS-232 transmitter output.
RS-232 data received on R2IN is transmitted as an RS-
485 signal on Z and Y. RS-485 signals received on A
and B are transmitted as an RS-232 signal on T1OUT.
MAX3160E
MAX3161E
MAX3162E
5k
R_ IN
R_ OUT
C2-
C2+
C1-
C1+
V-
V+
VCC
C4
C3
C1
C2
VCC
CBYPASS
SHDN
T_ OUT
T_ IN
GND
VCC
1000pF
Figure 14. Loopback Test Circuit
fl ZODnsr‘dw
MAX3160E/MAX3161E/MAX3162E ±15kV ESD-Protected, +3.0V to
+5.5V, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
Maxim Integrated | 19www.maximintegrated.com
Multiprotocol Bus
The
Typical Operating Circuit
shows a standard appli-
cation for the MAX3160E. The MAX3160E’s outputs are
multiplexed between RS-232 and RS-485 protocols by
a microprocessor (µP). The µP also directs the shut-
down functions, enable lines, and the duplex of the
MAX3160E. Data is transmitted to the MAX3100 UART
through an SPI™ port. The UART asynchronously
transfers data through the MAX3160E to the pin-select-
ed RS-232 or RS-485 protocal. See Table 14 for com-
monly used cable connections.
Multiprotocol Bus Multiplexer
The
Typical Application Circuit
shows the MAX3161E
configured as a multiprotocol bus multiplexer. The
MAX3161E separates the RS-232 and RS-485 lines, but
shares the logic pins between modes. This application
allows the µP to monitor a point-to-point RS-232 bus, and
a multidrop RS-485 interface. The MAX3100 UART asyn-
chronously transfers data through the MAX3161E to the
pin-selected RS-232 or RS-485 protocol.
TOUT
5V/div
TIN
1μs/div
ROUT
Figure 15. MAX3161E/MAX3162E RS-232 Loopback Test Result
at 250kbps, FAST = Low
200ns/div
TOUT
5V/div
ROUT
TIN
Figure 16. MAX3161E/MAX3162E RS-232 Loopback Test Result
at 1Mbps, FAST = High
SPI is a registered trademark of Motorola, Inc.
MAX3160E/MAX3161E/MAX3162E i15kV ESD-Protecte +5.5V, 10nA, RS-2 RS-422 Multiprotocol T Mamas MAXJWE MAXJMZE RD i R B DATA w was v was — «m: was DN MAXMZE DNLV Figure 77 H5485 L/ne Repeater
MAX3160E/MAX3161E/MAX3162E ±15kV ESD-Protected, +3.0V to
+5.5V, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
Maxim Integrated | 20www.maximintegrated.com
A
B
Z
D DATA OUT
DATA IN
R
DI
DE485
RE485
RO
Y
120Ω
120Ω
NOTE: RE485 ON MAX3162E ONLY
MAX3160E
MAX3161E
MAX3162E
Figure 17. RS-485 Line Repeater
MAX3162E
R1OUT
RO
RE485
DE485
A
B
Z
Y
V-
R1IN
RE232
TE232
FAST
V+
T1OUT
C2-
C2+
C1-
C1+
VCC
T1IN
R2OUT
DI
R2IN
GND
27
26
13
5
10
23
19
20
15
16
14
28 25
7
6
18
17
22
12
9
11
24
3
1
C1
100nF
C2
100nF
RCV
TX
RTS
C3
100nF
C4
100nF
2
3.3V
CBYPASS
100nF
SHDN
Figure 18. Protocol Translator
MAX3160E/MAX3161E/MAX3162E ±15kV ESD-Protected, +3.0V to
+5.5V, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
Maxim Integrated | 21www.maximintegrated.com
INPUTS OUTPUTS
SHDN RS-485/
RR
RRSS
SS--
--22
2233
3322
22
DI/T1IN,
DE485/T2IN
Z(B)/T1OUT,
Y(A)/T2OUT
0 X X 1/8-unit load
10 0 1
10 1 0
1 1 X RS-485 mode
Table 1. MAX3160E
INPUTS OUTPUTS
SHDN RS-485/
RR
RRSS
SS--
--22
2233
3322
22
DI/T1IN,
DE485/T2IN T1OUT, T2OUT
0 X X High-impedance
10 0 1
10 1 0
1 1 X High-impedance
Table 2. MAX3161E
INPUTS OUTPUTS
SHDN TE232 T1IN,T2IN T1OUT, T2OUT
0 X X High-impedance
X 0 X High-impedance
11 0 1
11 1 0
Table 3. MAX3162E
INPUTS OUTPUTS
SHDN RS-485/
RR
RRSS
SS--
--22
2233
3322
22
B/R1IN,
A/R2IN
R1OUT,
RO/R2OUT
X0 0 1
X0 1 0
X 0 Inputs open 1
X1 X
R1OUT
High-impedance,
RO/R2OUT in
RS-485 mode
Table 4. MAX3160E
INPUTS OUTPUTS
SHDN RS-485/
RR
RRSS
SS--
--22
2233
3322
22 R1IN, R2IN R1OUT,
RO/R2OUT
X0 0 1
X0 1 0
X 0 Inputs open 1
X1 X
R1OUT
High-impedance,
RO/R2OUT in
RS-485 mode
Table 5. MAX3161E
INPUTS OUTPUTS
SHDN RR
RREE
EE22
2233
3322
22 R1IN, R2IN R1OUT, R2OUT
X 1 X High-impedance
X0 0 1
X0 1 0
X 0 Inputs open 1
Table 6. MAX3162E
RS-232 Transmitters Truth Tables RS-232 Receivers Truth Tables
MAX3160E/MAX3161E/MAX3162E ±15kV ESD-Protected, +3.0V to
+5.5V, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
Maxim Integrated | 22www.maximintegrated.com
INPUTS OUTPUTS
SHDN RS-485/RR
RRSS
SS--
--22
2233
3322
22 DE485/T2IN DI/T1IN Z(B)/T1OUT Y(A)/T2OUT
0 X X X 1/8-unit load 1/8-unit load
1 1 0 X 1/8-unit load 1/8-unit load
1110 1 0
1111 0 1
X 0 X X RS-232 mode
Table 7. MAX3160E
INPUTS OUTPUTS
SHDN RS-485/RR
RRSS
SS--
--22
2233
3322
22 DE485/T2IN DI/T1IN Z(B) Y(A)
0 X X X 1/8-unit load 1/8-unit load
X 0 X X 1/8-unit load 1/8-unit load
X X 0 X 1/8-unit load 1/8-unit load
1110 1 0
1111 0 1
Table 8. MAX3161E
INPUTS OUTPUTS
SHDN DE485 DI Z Y
0 X X High-impedance High-impedance
X 0 X High-impedance High-impedance
110 1 0
111 0 1
Table 9. MAX3162E
INPUTS OUTPUT
RS-485/RR
RRSS
SS--
--22
2233
3322
22 SHDN HDPLX (A - B)* (Y - Z)* RO/R2OUT
1 0 X X X High-impedance up to VCC
110-50mV X 1
110-200mV X 0
1 1 0 Floating X 1
111X-50mV 1
111X-200mV 0
1 1 1 X Floating 1
0 X X X X RS-232 mode
Table 10. MAX3160E
*
Y and Z correspond to pins Y(A)/T2OUT and Z(B)/T1OUT. A and B correspond to pins A/R2IN and B/R1IN.
RS-485/RS-422 Drivers Truth Tables
RS-485/RS-422 Receivers Truth Tables
MAX3160E/MAX3161E/MAX3162E ±15kV ESD-Protected, +3.0V to
+5.5V, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
Maxim Integrated | 23www.maximintegrated.com
SUPPLY
VOLTAGE (V) C1 (µF) C2, C3, C4,
CBYPASS (µF)
+3.0 to +3.6 0.1 0.1
+4.5 to +5.5 0.047 0.33
+3.0 to +5.5 0.1 0.47
Table 13. Required Minimum
Capacitance Values
INPUTS OUTPUT
RS-485/RS-232 SHDN HDPLX A - B Y(A) - Z(B) RO/R2OUT
1 0 X X X High-impedance up to VCC
110-50mV X 1
110-200mV X 0
1 1 0 Floating X 1
111X-50mV 1
111X-200mV 0
1 1 1 X Floating 1
0 X X X X RS-232 mode
Table 11. MAX3161E
INPUTS OUTPUT
SHDN RR
RREE
EE44
4488
8855
55 A - B RO
0 X X High-impedance
X 1 X High-impedance
10-50mV 1
10-200mV 0
10 Inputs 1
Table 12. MAX3162E
RS-485/RS-422 Receivers Truth Tables (continued)
000 \ 0 00000 www maxmvmlegraled com Ma
MAX3160E/MAX3161E/MAX3162E ±15kV ESD-Protected, +3.0V to
+5.5V, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
Maxim Integrated | 24www.maximintegrated.com
TX
VCC HDPLX
DI/T1IN T1OUT
R1OUT R1IN
DE485/T2IN
GND FAST SHDN
T2OUT
RO/R2OUT R2IN
RX
RTS
CTS
13
RS-485/RS-232
12
11
10
19 8
10 17
918
Y(A)
RS-485
Z(B)
7
6
1
412 13 11
20 5
RJ45
DB9
RS-232
SHDN
µP
MAX3100
214
UART
MAX3161E
SPI
+3.3V
RS-485/
RS-232
MULTIPROTOCOL BUS MULTIPLEXER
Typical Application Circuit
PIN NUMBER
EIA/TIA-232
STANDARD
CONNECTOR
PIN
MAX3160E
MAX3161E
MAX3162E
EQUIVALENT MAX3160E MAX3161E MAX3162E
FUNCTION
(AS SEEN BY DTE)
DCD 1 Data carrier detect
RD 2 R2IN 13 17 19 Received data
TD 3 T1OUT 5 5 5 Transmitted data
DTR 4 Data terminal ready
SG 5 GND 4 4 4 Signal ground
DSR 6 Data set ready
RTS 7 T2OUT 6 8 8 Req uest to send ( = D TE ready)
CTS 8 R1IN 14 18 20 Clear to send (= DCE ready)
RI 9 Ring indicator
Table 14. Cable Connections Commonly Used for EIA/TIA-232 and V.24
Asynchronous Interfaces
333333133333]: EEEEEEEEEEETTE 333333333333 EEEEECEEEEEE 333333333] EEEEEEEEEE , mo 8 + m C www.maximinle raled.coml acka es 90-0094 90-001 0 90-0095 21-0056 21-0056 21-0056
MAX3160E/MAX3161E/MAX3162E ±15kV ESD-Protected, +3.0V to
+5.5V, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
Maxim Integrated | 25www.maximintegrated.com
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
V+
C2+
C2-
V-GND
C1-
VCC
C1+
TOP VIEW
DI/T1IN
DE485/T2IN
B/R1IN
A/R2INRO/R2OUT
R1OUT
Y(A)/T2OUT
Z(B)/T1OUT
12
11
9
10
HDPLX
FAST
MAX3160E
SSOP
RS-485/RS-232
24
23
22
21
20
19
18
17
1
2
3
4
5
6
7
8
V+
C2+
C2-
V-GND
C1-
VCC
C1+
DI/T1IN
DE485/T2IN
R1IN
R2INT2OUT
Y(A)
Z(B)
T1OUT
16
15
14
13
9
10
11
12
B
A
HDPLX
RS-485/RS-232FAST
RO/R2OUT
R1OUT
SSOP
MAX3161E
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
V+
C2+
C2-
V-
T1IN
DI
RE232
DE485
T2IN
R1IN
R2IN
B
A
TE232
FAST
SHDN
RE485
RO
R2OUT
R1OUT
T2OUT
Y
Z
T1OUT
GND
C1-
VCC
C1+
SSOP
MAX3162E
SHDN
SHDN
PART DUAL
MODE
FLOW-
THROUGH
PINOUT
RS-485
INPUT
UNIT
LOADS
MAX3160E No Yes 1/4
MAX3161E No No 1/8
MAX3162E Yes Yes 1/8
Selector Guide
Chip Information
TRANSISTOR COUNT: 1805
PROCESS: CMOS
Pin Configurations
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
PACKAGE
CODE
MAX3160ECAP
0°C to +70°C
20 SSOP A20-2
MAX3160EEAP
-40°C to +85°C
20 SSOP A20-2
MAX3161ECAG
0°C to +70°C
24 SSOP A24-3
MAX3161EEAG
-40°C to +85°C
24 SSOP A24-3
MAX3162ECAI
0°C to +70°C
28 SSOP A28-1
MAX3162EEAI
-40°C to +85°C
28 SSOP A28-1
Package Information
For the latest package outline information and land patterns (foot-
prints), go to www.maximintegrated.com/packages. Note that a
“+”, “#”, or “-” in the package code indicates RoHS status only.
Package drawings may show a different suffix character, but the
drawing pertains to the package regardless of RoHS status.
PACKAGE
TYPE
PACKAGE
CODE
OUTLINE
NO.
LAND
PATTERN NO.
20 SSOP A20-2 21-0056 90-0094
24 SSOP A24-3 21-0056 90-0010
28 SSOP A28-1 21-0056 90-0095
MAX3160E/MAX3161E/MAX3162E ±15kV ESD-Protected, +3.0V to
+5.5V, 10nA, RS-232/RS-485/
RS-422 Multiprotocol Transceivers
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent
licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and
max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. © 2015 Maxim Integrated Products, Inc. | 26
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at www.maximintegrated.com.
Revision History
REVISION
NUMBER
REVISION
DATE
DESCRIPTION
PAGES
CHANGED
0 2/05 Initial release
1 5/15 Updated Benefits and Features section 1