CAT9534HV4I-GT2

Overview

The CAT9534HV4I-GT2 is an 8-bit I/O expander designed for I2C and SMBus interfaces. It features a push-pull output type and includes an interrupt capability to signal state changes. The device operates within a supply voltage range of 1.65 V to 5.5 V, supporting communication speeds up to 400 kHz. It is housed in a 16-WQFN package with an exposed pad, suitable for surface mount applications.

Feature Summary

• Supports I2C and SMBus serial interface protocols
• Provides 8-bit general-purpose I/O expansion
• Features push-pull output drivers for robust signal integrity
• Includes interrupt functionality for efficient event handling

Applications

• Portable consumer electronics requiring GPIO expansion
• Industrial control systems utilizing I2C/SMBus networks
• Embedded devices needing additional input/output ports

Procurement Notes

Verify the specific suffix 'GT2' indicates tape and reel packaging configuration as per manufacturer standards. Confirm the 'HV' designation aligns with the required voltage operating range for your application. Ensure the 'WI' or similar variant matches the temperature grade needed. Cross-reference the datasheet revision date to ensure compatibility with current design specifications. Validate that the 16-WQFN footprint matches your PCB layout constraints.

Selection Notes

Select this component when an 8-bit I/O expansion solution is required on an I2C or SMBus bus. Consider the push-pull output capability if driving loads directly without external pull-ups is necessary. Evaluate the 1.65 V to 5.5 V operating range against your system's power rails. The compact 16-WQFN package makes it suitable for space-constrained designs compared to larger QFP packages.

Part Context

This part belongs to the CAT9534 family of I/O expanders from onsemi. It serves as a digital interface bridge between microcontrollers and peripheral devices. The series offers various pin counts and package options to suit different complexity levels. It complements other interface solutions by providing simple parallel-to-serial conversion capabilities.

Replacement Considerations

Direct substitutes include other CAT9534 variants with compatible pinouts and electrical characteristics. Verify that alternative parts support the same 400 kHz speed and voltage range. Check if the replacement maintains the push-pull output structure. Ensure the package dimensions match for mechanical interchangeability.