TCA9548ARGERQ1

Overview

The TCA9548ARGERQ1 is an automotive-grade bidirectional translating switch featuring eight independent SPST channels. It operates within a supply voltage range of 1.65 V to 5.25 V and supports I2C/SMBus protocols. The device provides up to 70 Ohms on-resistance with a maximum propagation delay of 1 ns. It is qualified under AEC-Q100 standards for automotive applications, ensuring reliability in demanding environments. The component functions as a bus switch to manage multiple I2C devices sharing the same address.

Feature Summary

• Provides eight independent bidirectional translating switches for I2C/SMBus signal routing
• Features integrated reset functionality to ensure defined initial states upon power-up
• Supports flexible addressing via hardware pins to expand I2C bus capacity
• Designed for automotive environments with specified temperature and voltage ranges

Applications

• Automotive infotainment systems requiring I2C device expansion
• Instrument clusters managing multiple sensors or displays
• Body control modules interfacing with various peripheral devices
• ADAS sensor hubs connecting multiple data sources

Procurement Notes

Verify the specific suffix 'Q1' confirms AEC-Q100 automotive qualification status. Ensure the package type matches the required VQFN-24 footprint for PCB layout compatibility. Confirm that the operating voltage range aligns with the target system's power rails. Check for moisture sensitivity level requirements during storage and handling procedures.

Selection Notes

Select this component when designing for automotive applications requiring robust I2C switching capabilities. The Q1 suffix indicates compliance with automotive reliability standards compared to commercial variants. Consider the VQFN-24 package size constraints against available board space. Evaluate the need for the integrated reset feature versus external reset solutions.

Part Context

This part belongs to the TCA9548A family of I2C switches manufactured by Texas Instruments. It serves as the automotive-qualified version of the standard TCA9548A, offering identical functional specifications but with enhanced durability and testing for vehicle electronics. It complements other members like the PCA9548A series designed for general consumer applications.

Replacement Considerations

• TCA9548A (Commercial grade equivalent)
• PCA9548A (Commercial grade alternative)

FAQ

How does the TCA9548ARGERQ1 handle devices with identical I2C addresses?

It isolates individual channels, allowing multiple devices with the same address to be connected to different ports without communication conflicts.

What is the purpose of the reset pin on this IC?

The reset pin forces all switches to a known state, typically disconnecting the channels, which is critical for safe initialization in automotive systems.