I/O Expanders

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Mfr Part #	Quantity Available	Price	Series	Package	Product Status	DigiKey Programmable	Number of I/O	Interface	Interrupt Output	Features	Output Type	Current - Output Source/Sink	Clock Frequency	Voltage - Supply	Operating Temperature	Mounting Type	Package / Case	Supplier Device Package

MCP23017T-E/SO IC XPNDR 1.7MHZ I2C 28SOIC Microchip Technology	25,905 In Stock	1 : ¥13.30000 Cut Tape (CT) 1,600 : ¥10.17964 Tape & Reel (TR)	-	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	16	I2C	Yes	POR	Push-Pull	25mA	1.7 MHz	1.8V ~ 5.5V	-40°C ~ 125°C	Surface Mount	28-SOIC (0.295", 7.50mm Width)	28-SOIC
MCP23017-E/SO IC XPNDR 1.7MHZ I2C 28SOIC Microchip Technology	9,356 In Stock	1 : ¥13.30000 Tube	-	Tube	Active	Not Verified	16	I2C	Yes	POR	Push-Pull	25mA	1.7 MHz	1.8V ~ 5.5V	-40°C ~ 125°C	Surface Mount	28-SOIC (0.295", 7.50mm Width)	28-SOIC
MCP23017T-E/SS IC XPNDR 1.7MHZ I2C 28SSOP Microchip Technology	17,140 In Stock	1 : ¥13.87000 Cut Tape (CT) 2,100 : ¥10.50800 Tape & Reel (TR)	-	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	16	I2C	Yes	POR	Push-Pull	25mA	1.7 MHz	1.8V ~ 5.5V	-40°C ~ 125°C	Surface Mount	28-SSOP (0.209", 5.30mm Width)	28-SSOP
MCP23017-E/SP IC XPNDR 1.7MHZ I2C 28SDIP Microchip Technology	4,858 In Stock	1 : ¥13.87000 Tube	-	Tube	Active	Not Verified	16	I2C	Yes	POR	Push-Pull	25mA	1.7 MHz	1.8V ~ 5.5V	-40°C ~ 125°C	Through Hole	28-DIP (0.300", 7.62mm)	28-SPDIP
MCP23017-E/SS IC XPNDR 1.7MHZ I2C 28SSOP Microchip Technology	3,613 In Stock	1 : ¥13.87000 Tube	-	Tube	Active	Not Verified	16	I2C	Yes	POR	Push-Pull	25mA	1.7 MHz	1.8V ~ 5.5V	-40°C ~ 125°C	Surface Mount	28-SSOP (0.209", 5.30mm Width)	28-SSOP
MCP23017T-E/ML IC XPNDR 1.7MHZ I2C 28QFN Microchip Technology	5,522 In Stock	1 : ¥15.60000 Cut Tape (CT) 1,600 : ¥11.82146 Tape & Reel (TR)	-	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	16	I2C	Yes	POR	Push-Pull	25mA	1.7 MHz	1.8V ~ 5.5V	-40°C ~ 125°C	Surface Mount	28-VQFN Exposed Pad	28-QFN (6x6)
MCP23017-E/ML IC XPNDR 1.7MHZ I2C 28QFN Microchip Technology	449 In Stock	1 : ¥15.60000 Tube	-	Tube	Active	Not Verified	16	I2C	Yes	POR	Push-Pull	25mA	1.7 MHz	1.8V ~ 5.5V	-40°C ~ 125°C	Surface Mount	28-VQFN Exposed Pad	28-QFN (6x6)

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I/O Expanders

Devices in this family are used in conjunction with microcontrollers, microprocessors, or similar devices for the purpose of increasing the number of signal connections available for connecting peripheral devices. The typical concept of operation involves the use of serial communications requiring only a few I/O lines on the host device to read/write the status of many input/output pins on the expander device. The technique exchanges speed of communication for increased connectivity, and is best suited for applications where fast response is not critical, such as in many human interface applications.