TCA6416PWT

Overview

The TCA6416PWT is a 16-bit I/O expansion device manufactured by Texas Instruments, designed for general-purpose digital input and output applications. It operates within a supply voltage range of 1.65 V to 5.5 V, ensuring compatibility with various system architectures. The component features an I2C interface for communication, supporting standard and fast-mode speeds up to 400 kHz. It is housed in a 28-pin TSSOP package, suitable for surface-mount assembly. The device includes configurable interrupt outputs and programmable pull-up resistors on its ports, enhancing flexibility in circuit design.

Feature Summary

• Provides 16 general-purpose digital I/O pins accessible via a two-wire I2C serial interface
• Supports operation across a wide voltage range from 1.65 V to 5.5 V for broad system integration
• Features configurable interrupt outputs that signal state changes to the host processor
• Includes internally pulled-up inputs with options for external pull-up configuration

Applications

• Expanding GPIO capabilities in embedded systems with limited microcontroller pins
• Interface management in portable consumer electronics requiring low power consumption
• Industrial control systems utilizing I2C-based sensor and actuator networks

Procurement Notes

Verify the specific suffix PWT corresponds to the TSSOP-28 package and tube packaging when sourcing. Confirm the operating temperature grade matches application requirements, as industrial variants may differ. Ensure I2C address settings align with system bus constraints to avoid conflicts. Check for RoHS compliance documentation if environmental regulations apply to the final product assembly.

Selection Notes

Select this component when a high pin-count I/O expander is needed with I2C connectivity. Consider the 1.65 V minimum voltage for battery-powered designs. Evaluate the need for interrupt functionality versus polling based on system latency requirements. Compare package size constraints against available PCB space, noting the TSSOP-28 footprint dimensions.

Part Context

This part belongs to the TCA6416 family of 16-bit I/O expanders. It shares functional similarities with other TI I2C GPIO devices but is distinct in its specific voltage range and package options. The TCA6416 series is commonly used in scenarios requiring significant I/O expansion without dedicated SPI or parallel interfaces.

Replacement Considerations

Direct substitutes include other 16-bit I2C I/O expanders from Texas Instruments such as the PCF8574 series, though pinouts and register maps may differ. Verify electrical characteristics and package compatibility before replacement. Alternative manufacturers offer similar devices, but software driver adjustments may be necessary.