TCA6424ARGJR

Overview

The TCA6424ARGJR is a low-voltage 24-bit I/O expander designed for I2C and SMBus interfaces. It operates within a supply voltage range of 1.65 V to 5.5 V, supporting bidirectional voltage translation between the P-port and SDA/SCL lines. The device features a maximum clock frequency of 400 kHz and includes an interrupt output pin. It utilizes a 32-UQFN (5x5) package with surface-mount installation. Key electrical characteristics include an ESD protection rating of 2 kV and output current capabilities of 10 mA or 25 mA depending on configuration. The operational temperature range spans from -40°C to +85°C.

Feature Summary

• Supports wide supply voltage range enabling compatibility with both low-voltage microcontrollers and 5V peripheral components
• Includes hardware address pin allowing up to two devices on the same bus without external logic
• Features open-drain interrupt output to signal input state changes without continuous polling

Applications

• Remote I/O expansion for microcontroller systems via I2C interface
• Driving LEDs directly from P-port outputs due to high current absorption capability
• Bidirectional voltage level shifting between different power domains in mixed-signal circuits

Procurement Notes

Verify the specific suffix ARGJR corresponds to the 32-UQFN package and tape-and-reel delivery format. Confirm RoHS compliance status through official Texas Instruments documentation prior to integration. Ensure the supplier provides valid traceability data matching the manufacturer's part identification standards.

Selection Notes

Select this component when a 24-bit I/O solution is required with independent voltage domains for inputs and outputs. The integrated interrupt functionality reduces processor load compared to polling methods. Verify that the 400 kHz I2C speed meets system timing requirements and that the UQFN footprint fits the PCB layout constraints.

Part Context

This part belongs to the TCA6424A series of I/O expanders from Texas Instruments. It shares core architecture with variants like TCA6424RGJR but differs in packaging and specific ordering suffixes. The series is categorized under Interface ICs, specifically I/O Expanders, designed for general-purpose remote I/O extension tasks.

Replacement Considerations

TCA6424RGJR is a related variant within the same family. Verify if the package type and reel specifications are interchangeable for your assembly process. No other direct cross-model substitutes are confirmed in public documentation.