CAT9554WI-GT2

Overview

The CAT9554WI-GT2 is an I/O expander manufactured by onsemi, designed for I2C and SMBus communication protocols. It provides eight bidirectional general-purpose digital input/output pins within a compact surface-mount package. The device operates with a supply voltage range of 2.3V to 5.5V and supports clock frequencies up to 400 kHz. Key electrical characteristics include push-pull output types with current drive capabilities of 10mA and 24mA. It features an interrupt output pin and includes power-on reset (POR) functionality. The component is rated for operation in temperatures ranging from -40°C to +85°C and utilizes a 16-TSSOP package.

Feature Summary

• Supports I2C and SMBus serial interfaces for efficient system connectivity
• Provides eight bidirectional digital I/O lines with interrupt capability
• Integrates power-on reset circuitry for reliable initialization

Applications

• Portable devices requiring extended I/O capabilities
• Industrial control systems utilizing SMBus protocols
• Consumer electronics with limited microcontroller pins

Procurement Notes

Verify the specific suffix 'GT2' against official datasheets to confirm tape and reel packaging specifications. Confirm RoHS compliance status as indicated in manufacturer documentation. Check for any product change notifications or end-of-life declarations prior to procurement decisions.

Selection Notes

Select this component when an I2C/SMBus interface is required for expanding digital I/O lines. Ensure the system voltage falls within the 2.3V to 5.5V operating range. Verify that the 16-TSSOP package dimensions fit the PCB layout constraints and thermal requirements.

Part Context

This part belongs to the CAT9554 family of I/O expanders from onsemi. It serves as a solution for adding parallel I/O ports via serial interfaces. The WI-GT2 designation indicates the specific package type and manufacturing lot coding associated with this variant.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult official distributor databases for cross-reference information if alternative sourcing is required.