MCP23008-E/SSVAO

Overview

The MCP23008-E/SSVAO is an 8-bit I/O expander featuring an I2C serial interface. It operates within a supply voltage range of 1.8V to 5.5V and supports clock frequencies up to 1.7MHz. The device provides eight bidirectional general-purpose I/O pins with configurable interrupt-on-change capabilities. It utilizes three hardware address pins (A0-A2) for bus addressing, allowing up to eight devices on a single I2C bus. The component is housed in a 20-pin SSOP package.

Feature Summary

• Provides 8-bit parallel I/O expansion via a high-speed I2C serial interface
• Features configurable interrupt output with polarity selection and open-drain options
• Includes internal weak pull-up resistors and input polarity inversion registers
• Supports multiple device addressing through three dedicated hardware address pins

Applications

• Embedded systems requiring GPIO expansion for resource-constrained microcontrollers
• Industrial control interfaces utilizing I2C communication protocols
• Consumer electronics integrating additional sensors or actuators
• Automotive applications operating within specified temperature ranges

Procurement Notes

Verify the specific suffix 'SSVAO' against official Microchip documentation to confirm the exact tape-and-reel packaging configuration and environmental compliance status. Ensure the ordering code matches the required 20-pin SSOP form factor and industrial temperature specifications before finalizing procurement orders.

Selection Notes

Select this component when an I2C interface is preferred over SPI for system architecture. The MCP23008 is suitable for designs requiring up to eight additional digital I/O lines. Consider the 20-pin SSOP package constraints regarding PCB space and thermal dissipation requirements during the layout phase.

Part Context

This part belongs to the MCP23X08 family of 8-bit I/O expanders manufactured by Microchip Technology. It serves as the I2C variant counterpart to the MCP23S08, which utilizes an SPI interface. The series is designed to simplify system design by reducing pin count requirements on the main controller.

Replacement Considerations

The MCP23S08 offers identical functionality but uses an SPI interface instead of I2C. Other compatible parts include the MCP23017 for 16-bit expansion needs. Verify register compatibility and interface timing differences when substituting these components.