TCA6416PW

Overview

The TCA6416PW is a low-voltage 16-bit I2C and SMBus I/O expander manufactured by Texas Instruments. It provides general-purpose parallel input and output expansion for two-wire bidirectional buses. The device operates within a supply voltage range of 1.65V to 5.5V, supporting various logic levels. It features configurable I/Os with open-drain or push-pull outputs, interrupt output capability, and power-on reset (POR) functionality. The component is housed in a 24-pin TSSOP package suitable for surface-mount applications.

Feature Summary

• Provides 16-bit general-purpose digital input and output expansion via I2C and SMBus interfaces
• Supports voltage translation between the bus interface and the I/O ports
• Includes an interrupt output pin to signal state changes to the host processor
• Features configuration registers allowing individual I/O pins to be set as inputs or outputs

Applications

• Portable devices requiring additional GPIOs within limited space
• Industrial control systems utilizing I2C/SMBus communication
• Consumer electronics needing expanded input/output capabilities
• Embedded systems requiring voltage level shifting between different logic domains

Procurement Notes

Verify the specific suffix 'PW' corresponds to the 24-TSSOP package when sourcing. Confirm RoHS compliance status through official manufacturer documentation or authorized distributors. Ensure the ordering part number matches the required tape-and-reel or cut-tape quantity specifications for your manufacturing process.

Selection Notes

Select this component when a 16-bit I/O expansion solution is required with I2C compatibility. Consider the TCA6416 series if voltage translation features are necessary. Verify that the 24-TSSOP package fits the PCB footprint constraints. Check operating temperature ranges against environmental requirements before finalizing the design.

Part Context

The TCA6416PW belongs to the TCA6416A family of low-voltage I/O expanders from Texas Instruments. This family is designed to extend I2C and SMBus capabilities in space-constrained applications. The 'PW' suffix specifically denotes the 24-lead Thin Shrink Small Outline Package (TSSOP), distinguishing it from other package options like APWR.

Replacement Considerations

Direct substitutes include TCA6416APWR and TCA6416APWRG4, which share identical electrical characteristics and pinouts. Verify package compatibility when replacing TCA6416PW with these variants. Other families such as PCA9535 may offer similar functionality but require schematic review due to potential differences in register mapping and interrupt handling.