TCA6408PWG4

Overview

The TCA6408PWG4 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 and supports clock frequencies up to 400 kHz. The device features open-drain outputs capable of sourcing or sinking 10 mA or 25 mA, depending on the specific configuration. It includes an interrupt output pin for efficient event handling and functions across a temperature range of -40°C to +85°C. Packaged in a 16-pin TSSOP format, it draws only 1 µA of operating current, making it suitable for power-sensitive applications.

Feature Summary

• Supports standard I2C and SMBus protocols for flexible system integration
• Provides eight general-purpose digital input/output pins with configurable interrupt capability
• Operates with ultra-low standby current consumption for energy-efficient designs

Applications

• Portable consumer electronics requiring extended GPIO capabilities
• Industrial control systems utilizing I2C-based communication networks
• Automotive infotainment and body control modules

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for obsolescence notices, as this part may be discontinued. Ensure packaging specifications match design requirements before procurement.

Selection Notes

Compare against active alternatives like the TCA6408AQPWRQ1 for automotive-grade requirements. Evaluate package availability and lead times carefully due to potential end-of-life status. Consider voltage level compatibility with host microcontrollers when selecting this expander.

Part Context

This component belongs to the TCA6408 series of I/O expanders from Texas Instruments. It shares functional similarities with other devices in the family but differs in specific electrical characteristics and packaging options. The PWG4 suffix indicates a specific tape-and-reel or tube packaging variant compliant with certain environmental standards.

Replacement Considerations

The TCA6408AQPWRQ1 is a confirmed automotive-grade alternative within the same product family. Verify pinout compatibility and software register mapping before substitution. Check if the replacement meets the required operating temperature and voltage specifications.