TCA9534ADWT

Overview

The TCA9534ADWT is a remote 8-bit I2C and SMBus low-power I/O expander manufactured by Texas Instruments. It operates within a supply voltage range of 1.65 V to 5.5 V and supports clock frequencies up to 400 kHz. The device features an interrupt output pin and configuration registers for flexible input/output direction control. It is housed in a 16-pin SOIC package with surface mount installation. The component provides ESD protection rated at 2 kV and functions reliably across an operating temperature range from -40°C to +85°C.

Feature Summary

• Supports I2C and SMBus serial communication protocols for efficient data transfer
• Includes dedicated interrupt output pin to signal external events without continuous polling
• Features configuration registers allowing individual bit direction setting for inputs or outputs

Applications

• Portable battery-powered devices requiring low power consumption
• Systems needing additional GPIO pins via standard I2C interfaces
• Industrial control modules operating in extended temperature environments

Procurement Notes

Verify the specific suffix 'ADWT' corresponds to the SOIC-16 package variant when sourcing. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the ordering part number matches the required tape and reel specifications for automated assembly processes.

Selection Notes

Select this component when an 8-bit expansion is required with interrupt capabilities. Compare against the TCA9534DWT if different packaging or minor electrical variations are acceptable. Consider the TCA9534APWR for TSSOP-16 footprint requirements instead of the SOIC-16 form factor.

Part Context

This part belongs to the TCA9534A series of I/O expanders. It shares core functionality with the TCA9534DWT but may differ in manufacturing lot or specific package handling characteristics defined by the 'A' designation. It serves as a direct interface solution for microcontrollers lacking sufficient native GPIO ports.

Replacement Considerations

The MAX7329AWE+ is listed as a similar alternative by distributors. Verify pin compatibility and register mapping before substitution. No other direct cross-model replacements are confirmed in public documentation.