TCA6408RGTR

Overview

The TCA6408RGTR 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 an interrupt output for efficient event monitoring and includes configuration registers for individual pin direction control. Packaged in a 16-pin TSSOP format, it offers open-drain outputs with configurable drive capabilities. This component is designed for general-purpose digital input and output expansion in embedded systems requiring minimal interface lines.

Feature Summary

• Supports I2C and SMBus protocols for serial communication
• Provides 8-bit general-purpose digital I/O expansion
• Includes interrupt output functionality for event-driven operation
• Features configuration registers for flexible pin direction settings

Applications

• Embedded system peripheral expansion
• Consumer electronics interface management
• Industrial control panel input/output handling
• Battery-powered devices requiring low-power I/O extension

Procurement Notes

Verify the specific suffix 'R' against the official datasheet to confirm tape-and-reel packaging specifications. Ensure compatibility with existing I2C address configurations and voltage levels. Check for RoHS compliance status as indicated in the manufacturer's documentation. Confirm availability through authorized distributors given potential lifecycle changes.

Selection Notes

Select this component when an 8-bit I/O expander with I2C interface is required. Ensure the system voltage falls within the 1.65 V to 5.5 V operating range. Consider the interrupt output feature if real-time pin state monitoring is necessary. Verify that the TSSOP-16 package fits the PCB layout constraints.

Part Context

The TCA6408 series belongs to Texas Instruments' family of low-voltage I/O expanders. These devices are designed to simplify system design by reducing pin count on microcontrollers. The TCA6408 specifically provides 8 bits of expansion via two-wire serial interfaces, making it suitable for space-constrained applications.

Replacement Considerations

Check for direct replacements like TCA6408APWR or TCA6408PW depending on packaging requirements. Verify electrical parameters such as voltage range and current drive capabilities before substitution. Ensure pinout compatibility to avoid redesigning the PCB footprint.