TCA9539QPWRQ1

Overview

The TCA9539QPWRQ1 is an automotive-grade, low-voltage 16-bit I/O expander manufactured by Texas Instruments. It operates within a supply voltage range of 1.65 V to 3.6 V and supports I2C and SMBus serial interfaces with a maximum clock frequency of 400 kHz. The device features open-drain or push-pull outputs, interrupt capability, and configuration registers for input/output direction control. It is housed in a TSSOP-24 package and is qualified under AEC-Q100 standards. Operating temperatures span from -40°C to +125°C, with a typical operating current of 10 µA and ESD protection rated at 2 kV.

Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for reliability in vehicle environments.
• Configurable 16-bit I/O ports supporting both open-drain and push-pull output modes.
• Integrated interrupt pin and reset pin functionality for system monitoring and recovery.

Applications

• Automotive infotainment systems requiring extended I/O capabilities.
• Body control modules managing peripheral devices in low-voltage architectures.
• General-purpose I/O expansion in automotive electronic control units.

Procurement Notes

Verify the specific ordering suffix to ensure the correct package type and tape-and-reel specifications match your manufacturing requirements. Confirm that the component meets the required AEC-Q100 grade for your automotive application. Check datasheet revisions for any updates regarding electrical characteristics or recommended operating conditions before finalizing procurement.

Selection Notes

Select this component when a 16-bit I/O expander is needed for automotive applications operating between 1.65 V and 3.6 V. Ensure the design utilizes I2C or SMBus communication lines compatible with the 400 kHz maximum clock speed. Verify that the TSSOP-24 package fits the PCB layout constraints and that the thermal performance supports the -40°C to +125°C operating range.

Part Context

This part belongs to the TCA9539 series of low-voltage I/O expanders designed for automotive use. It serves as a solution for expanding microcontroller I/O resources in space-constrained automotive electronics. The QPWRQ1 suffix indicates the specific automotive qualification, TSSOP-24 package, and reel packaging format provided by Texas Instruments.

Replacement Considerations

Consult official Texas Instruments documentation for verified cross-reference parts. No public substitute part numbers are confirmed in the available source material.