TCA6416PWG4

Overview

The TCA6416PWG4 is a 16-bit I/O expander designed for I2C-bus and SMBus protocols. It operates within a supply voltage range of 1.65 V to 5.5 V, supporting low-power applications across various digital systems. The device features configurable configuration registers that allow individual pins to be set as inputs or outputs. It includes an interrupt output pin to signal state changes to the host processor. The component is housed in a TSSOP-20 package and supports standard and fast-mode clock frequencies up to 400 kHz.

Feature Summary

• Provides 16 general-purpose digital input/output channels via I2C/SMBus interface
• Supports voltage translation between 1.65 V and 5.5 V domains
• Includes dedicated interrupt output for efficient event-driven communication

Applications

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

Procurement Notes

Verify the complete part number including the G4 suffix against official Texas Instruments documentation to ensure compliance with lead-free manufacturing standards. Confirm package type and operating temperature range match system requirements before procurement. Cross-reference datasheet revisions to ensure compatibility with existing design specifications.

Selection Notes

Select this component when a 16-bit expansion is required for I2C or SMBus networks. Ensure the system voltage levels fall within the 1.65 V to 5.5 V operational range. Verify that the TSSOP-20 package fits the PCB layout constraints. Consider interrupt line availability if real-time status updates are necessary for the application design.

Part Context

This part belongs to the TCA6416 family of I/O expanders from Texas Instruments. It shares functional similarities with other members like the TCA6408 but offers double the I/O count. The G4 suffix indicates a lead-free and RoHS-compliant variant. It serves as a direct replacement for older non-G4 versions where environmental compliance is mandated.

Replacement Considerations

The TCA6416PWR is a compatible alternative without the G4 suffix, differing primarily in manufacturing compliance details rather than electrical function. Other family members such as the TCA6416RTW offer different packaging options.