TCA6408PWRG4

Overview

The TCA6408PWRG4 is a low-voltage 8-bit I/O expander manufactured by Texas Instruments, designed for serial communication via I2C and SMBus interfaces. It operates within a supply voltage range of 1.65 V to 5.5 V, supporting flexible integration into various digital systems. The device features an interrupt output capability to signal state changes efficiently. It is housed in a TSSOP-16 surface-mount package and supports clock frequencies up to 400 kHz. Operating temperatures span from -40°C to +85°C, with a typical operating current of 1 µA.

Feature Summary

• Provides eight general-purpose digital input/output pins accessible through standard I2C/SMBus protocols.
• Includes dedicated interrupt output functionality to notify the host controller of external events without continuous polling.
• Supports wide supply voltage operation ranging from 1.65 V to 5.5 V for compatibility with diverse logic levels.

Applications

• Portable consumer electronics requiring extended GPIO capabilities
• Industrial control systems utilizing I2C bus architectures
• Embedded devices needing low-power peripheral expansion

Procurement Notes

Verify component authenticity against official Texas Instruments documentation. Confirm that the specific suffix matches the required package and temperature grade. Check for obsolescence status as this series may be discontinued or subject to limited availability. Ensure compliance with RoHS directives if applicable to your manufacturing region.

Selection Notes

Select this component when an I2C-compatible 8-bit expander is required within the 1.65 V to 5.5 V range. Consider the TSSOP-16 package constraints for PCB layout. Evaluate if the 400 kHz maximum clock speed meets system timing requirements. Verify that the interrupt pin configuration aligns with the host microcontroller's input specifications.

Part Context

This part belongs to the TCA6408 family of low-voltage I/O expanders. It shares functional similarities with other Texas Instruments I2C interface chips but is distinct in its 8-bit capacity and specific voltage thresholds. The 'G4' suffix typically indicates lead-free and green material compliance standards defined by the manufacturer.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source data. Consult Texas Instruments application notes for direct pin-to-pin compatible alternatives within the same product family.