MCP23008 Series

8-Bit I2C I/O Expander with Serial Interface

Catalog

8-Bit I2C I/O Expander with Serial Interface

Part	Clock Frequency	Supplier Device Package	Number of I/O	Package / Case [y]	Package / Case [y]	Package / Case	Interface	Voltage - Supply [Min]	Voltage - Supply [Max]	Mounting Type	Output Type	Operating Temperature [Max]	Operating Temperature [Min]	Current - Output Source/Sink	Features	Qualification	Grade
Microchip Technology MCP23008T-E/SO	1.7 MHz	18-SOIC	8	0.295 in	7.5 mm	18-SOIC	I2C	1.8 V	5.5 V	Surface Mount	Push-Pull	125 °C	-40 °C	25 mA	POR
Microchip Technology MCP23008T-E/SSVAO	10 MHz	20-SSOP	8			20-SSOP	I2C	4.5 V	5.5 V	Surface Mount	Push-Pull	125 °C	-40 °C	25 mA	POR	AEC-Q100	Automotive
Microchip Technology MCP23008-E/SSVAO	1.7 MHz	20-SSOP	8			20-SSOP	I2C	1.8 V	5.5 V	Surface Mount	Push-Pull	125 °C	-40 °C	25 mA	POR	AEC-Q100	Automotive
Microchip Technology MCP23008-E/SS	1.7 MHz	20-SSOP	8			20-SSOP	I2C	1.8 V	5.5 V	Surface Mount	Push-Pull	125 °C	-40 °C	25 mA	POR
Microchip Technology MCP23008-E/SO	1.7 MHz	18-SOIC	8	0.295 in	7.5 mm	18-SOIC	I2C	1.8 V	5.5 V	Surface Mount	Push-Pull	125 °C	-40 °C	25 mA	POR

Catalog

8-Bit I2C I/O Expander with Serial Interface

Key Features

• * 8-bit port expander with interrupt output

• * 3 address inputs for up to 8 devices on one bus

• * 25mA sink/source capability per I/O

• * Supports 100kHz, 400kHz and 1.7MHz I2C™Compatible modes

• * Internal power-on-reset (POR)

Description

The MCP23X08 device provides 8-bit, general purpose, parallel I/O expansion for I2C bus or SPI applications. The two devices differ in the number of hardware address pins and the serial interface: • MCP23008 – I2C interface; three address pins • MCP23S08 – SPI interface; two address pins The MCP23X08 consists of multiple 8-bit configuration registers for input, output and polarity selection. The system master can enable the I/Os as either inputs or outputs by writing the I/O configuration bits. The data for each input or output is kept in the corresponding Input or Output register. The polarity of the Input Port register can be inverted with the Polarity Inversion register. All registers can be read by the system master.