TCA9534PWR

Overview

The TCA9534PWR is an 8-bit I/O expander from Texas Instruments designed for remote I/O expansion via the I2C and SMBus interfaces. It operates within a supply voltage range of 1.65 V to 5.5 V, supporting standard (100 kHz), fast (400 kHz), and high-speed modes. The device features configurable configuration registers that allow individual pins to be set as inputs or outputs. It includes an interrupt output pin to signal state changes on input ports. The component is housed in a TSSOP-16 package and supports push-pull output configurations with a maximum sink current capability.

Feature Summary

• Supports bidirectional data transfer through I2C and SMBus serial interfaces
• Configurable logic allows flexible assignment of input and output functions per pin
• Interrupt mechanism signals specific port states to the host processor

Applications

• Remote I/O expansion in embedded systems
• Consumer electronics requiring additional control lines
• Industrial control panels needing interface extension

Procurement Notes

Verify the specific ordering suffix against the manufacturer's latest documentation to ensure correct package type and temperature rating. Confirm RoHS compliance status and lead times directly with authorized distributors prior to procurement. Ensure the selected variant matches the required operating voltage and interface specifications for the target application design.

Selection Notes

Select this component when an 8-bit expansion is required for I2C-based architectures. Verify that the system voltage falls within the 1.65 V to 5.5 V operational range. Consider the TSSOP-16 package constraints regarding PCB space and thermal dissipation. Ensure the host controller supports the necessary I2C clock speeds and interrupt handling capabilities.

Part Context

This part belongs to the TCA9534 family of low-power I/O expanders. It serves as a peripheral interface solution for microcontrollers lacking sufficient general-purpose I/O pins. The device complements other Texas Instruments interface ICs by providing simple, software-configurable expansion without complex protocol overhead.

Replacement Considerations

Direct pin-to-pin replacements include the TCA9534APWR and TCA9534ADWR variants within the same product family. Verify functional equivalence regarding voltage ranges and interrupt polarity before substitution. Consult official cross-reference guides for any minor electrical parameter differences between revisions.