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	10,206 In Stock	1 : ¥243.00000 Cut Tape (CT) 1,600 : ¥185.90063 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	4,248 In Stock	1 : ¥243.00000 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
MCP23017-E/SS IC XPNDR 1.7MHZ I2C 28SSOP Microchip Technology	12,005 In Stock	1 : ¥253.00000 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/SS IC XPNDR 1.7MHZ I2C 28SSOP Microchip Technology	8,893 In Stock	1 : ¥253.00000 Cut Tape (CT) 2,100 : ¥191.89714 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	5,113 In Stock	1 : ¥253.00000 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
MCP23017T-E/ML IC XPNDR 1.7MHZ I2C 28QFN Microchip Technology	7,036 In Stock	1 : ¥285.00000 Cut Tape (CT) 1,600 : ¥215.88313 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	720 In Stock	1 : ¥285.00000 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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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.