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

ADP5587ACPZ-R7 IC XPNDR 400KHZ I2C 24LFCSP Analog Devices Inc.	11,000 In Stock	1 : ¥29.47000 Cut Tape (CT) 1,500 : ¥15.55474 Tape & Reel (TR)	-	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	18	I2C	Yes	Keypad Controller, POR	Open Drain	-	400 kHz	1.65V ~ 3.6V	-40°C ~ 85°C	Surface Mount	24-WFQFN Exposed Pad, CSP	24-LFCSP-WQ (4x4)
ADP5587ACPZ-1-R7 IC XPNDR 400KHZ I2C 24LFCSP Analog Devices Inc.	547 In Stock	1 : ¥29.47000 Cut Tape (CT) 1,500 : ¥15.55474 Tape & Reel (TR)	-	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	18	I2C	Yes	Keypad Controller, POR	Open Drain	-	400 kHz	1.65V ~ 3.6V	-40°C ~ 85°C	Surface Mount	24-WFQFN Exposed Pad, CSP	24-LFCSP-WQ (4x4)
ADP5587ACBZ-R7 IC XPNDR 400KHZ I2C 25WLCSP Analog Devices Inc.	1,354 In Stock	1 : ¥29.47000 Cut Tape (CT) 1,500 : ¥15.55474 Tape & Reel (TR)	-	Tape & Reel (TR) Cut Tape (CT) Digi-Reel®	Active	Not Verified	18	I2C	Yes	Keypad Controller, POR	Open Drain	-	400 kHz	1.65V ~ 3.6V	-40°C ~ 85°C	Surface Mount	25-UFBGA, WLCSP	25-WLCSP (1.97x1.97)

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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.