TCA9534DWR

Overview

The TCA9534DWR is an 8-bit I/O expander from Texas Instruments, designed for I2C and SMBus interfaces. 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 open-drain outputs and includes an interrupt output pin. It is housed in a 16-pin SOIC package with surface-mount installation. The component functions across a temperature range of -40°C to +85°C and provides 2 kV ESD protection.

Feature Summary

• Configurable I/O pins allow individual selection between input and output modes via configuration registers.
• Interrupt output pin signals state changes on inputs to the host processor without continuous polling.
• Wide operating voltage range enables compatibility with various system power supplies.

Applications

• Portable devices requiring additional GPIOs under strict power constraints
• Industrial control systems utilizing I2C communication buses
• Consumer electronics needing remote I/O expansion

Procurement Notes

Verify the specific suffix against official datasheets to confirm package type and tape-and-reel specifications. Ensure the ordering code matches the required SOIC-16 variant. Confirm RoHS compliance status through manufacturer documentation before finalizing procurement orders.

Selection Notes

Select this component when an 8-bit I/O expander with interrupt capability is required for I2C-based designs. Consider the TCA9534ADWR if push-pull output configurations are necessary instead of open-drain. Verify that the 1.65 V minimum supply voltage aligns with the target system's power architecture.

Part Context

This part belongs to the TCA9534 series of remote 8-bit I/O expanders. It shares functional similarities with other members like the TCA9534ADWR but differs in output drive characteristics. The DWR suffix specifically denotes the SOIC-16 package format used in surface-mount applications.

Replacement Considerations

The MAX7329AWE+ is listed as a similar alternative by distributors. Verify electrical compatibility and pin mapping before substitution.