TCA9534DWT

Overview

The TCA9534DWT is a remote 8-bit I2C 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 via I2C and SMBus interfaces. The device features an interrupt output pin and configuration registers for flexible input/output control. It is housed in a 16-pin SOIC package with surface-mount installation. The component functions reliably across an operating temperature range from -40°C to +85°C and includes ESD protection rated at 2 kV.

Feature Summary

• Configurable I/O pins allow individual selection of input or output functionality through dedicated configuration registers.
• Interrupt output pin provides efficient status signaling for external events without continuous polling.
• Wide supply voltage compatibility enables operation in systems ranging from low-voltage digital logic to standard 5V environments.

Applications

• Remote I/O expansion in embedded control systems
• Interface bridging between microcontrollers and peripheral devices
• Consumer electronics requiring additional GPIO ports

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm package type and tape-and-reel specifications. Ensure the component meets RoHS compliance requirements for your target market. Cross-reference the part number with official distributor catalogs to validate authenticity and current production status before finalizing procurement plans.

Selection Notes

Select this component when an 8-bit I/O expansion solution is required with I2C connectivity. Confirm that the system voltage falls within the 1.65 V to 5.5 V operational range. Verify that the SOIC-16 package dimensions fit the available PCB footprint. Check if the interrupt capability is necessary for the application's latency requirements.

Part Context

This part belongs to the TCA9534 series of I/O expanders from Texas Instruments. It shares functional similarities with other members like the TCA9534DWR but differs in packaging and reel specifications. The series is designed for low-power applications requiring reliable remote I/O control over serial buses.

Replacement Considerations

The TCA9534DWR is a documented substitute within the same family, offering identical electrical characteristics but potentially differing in reel quantity or specific manufacturing lot details. Verify pinout compatibility and register mapping before substitution.