CAT9554AWI-GT2

Overview

The CAT9554AWI-GT2 is an I/O expander manufactured by onsemi, designed for I2C and SMBus communication protocols. It features eight bidirectional I/O lines with push-pull outputs capable of sourcing or sinking up to 10mA or 24mA respectively. The device operates within a supply voltage range of 2.3V to 5.5V and supports clock frequencies up to 400 kHz. It is housed in a 16-TSSOP package with a width of 4.40mm. The component includes power-on reset (POR) functionality and interrupt output capabilities. It is rated for operation at temperatures between -40°C and 85°C.

Feature Summary

• Supports I2C and SMBus interfaces for system connectivity
• Provides eight bidirectional I/O lines with interrupt output capability
• Includes internal power-on reset circuitry for reliable initialization

Applications

• Portable equipment requiring extended I/O capabilities
• Industrial control systems utilizing I2C/SMBus networks
• Consumer electronics needing additional GPIO expansion

Procurement Notes

Verify the specific suffix 'AWI' against the manufacturer's current datasheet to confirm pinout and electrical characteristics match your design requirements. Confirm availability status as this part may be subject to discontinuation notices. Ensure the 16-TSSOP package dimensions align with your PCB footprint specifications before finalizing procurement orders.

Selection Notes

Select this component when an I2C-based solution with eight general-purpose I/O lines is required. Consider the 2.3V to 5.5V operating range for compatibility with various logic levels. Evaluate the 400 kHz maximum clock speed against system timing constraints. Verify that the interrupt output feature meets the host controller's polling or interrupt handling needs.

Part Context

This part belongs to the CAT9554 family of I/O expanders from onsemi. It shares functional similarities with other members like the CAT9554AYI-GT2 but differs in packaging or temperature grade indicated by the suffix. These devices are commonly used to reduce pin count on microcontrollers by expanding available I/O ports via serial interfaces.

Replacement Considerations

The CAT9554AYI-GT2 is a documented alternative within the same product family. Verify if the package type and temperature range differences between the AWI and AYI suffixes impact your specific application requirements before substitution.