TCA6408PWR

Overview

The TCA6408PWR is a low-voltage 8-bit I2C and SMBus I/O expander manufactured by Texas Instruments. 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 eight general-purpose open-drain outputs with configurable drive capabilities of 10 mA or 25 mA. It includes an interrupt output pin for efficient host notification of input changes. The component is housed in a 16-pin TSSOP package and supports power-on reset functionality.

Feature Summary

• Supports I2C and SMBus serial communication protocols
• Configurable interrupt output for event-driven operation
• Adjustable output drive strength for load flexibility

Applications

• Portable consumer electronics requiring GPIO expansion
• Industrial control systems with limited microcontroller pins
• Automotive infotainment interfaces

Procurement Notes

Verify the specific revision suffix and RoHS compliance status directly from the manufacturer's current documentation. Confirm that the 16-TSSOP package dimensions match your PCB footprint requirements before finalizing procurement decisions.

Selection Notes

Select this component when an 8-bit expansion is required with I2C connectivity. Ensure the system voltage aligns with the 1.65 V to 5.5 V operating range. Consider the TCA6408A variant if automotive qualification under AEC-Q100 standards is necessary for the application environment.

Part Context

This part belongs to the TCA6408 family of low-voltage I/O expanders. It serves as a cost-effective solution for adding digital inputs and outputs to systems using serial buses. The device simplifies interface design by reducing the number of direct connections required between the microcontroller and peripheral devices.

Replacement Considerations

The TCA6408APWR is a functionally equivalent alternative within the same product family. Verify package compatibility and electrical specifications against the original datasheet before substitution.