74AVC4T245QPWRQ1

Overview

The SN74AVC4T245QPWRQ1 is an automotive-grade, 4-bit dual-supply bus transceiver with configurable voltage translation and 3-state outputs. It supports VCCA and VCCB supply voltages ranging from 1.2V to 3.6V, enabling bidirectional translation between any low-voltage nodes including 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V. The device achieves maximum data rates of up to 380Mbps during 1.8V to 3.3V translation. It features Ioff for partial power-down operation and meets AEC-Q100 Grade 1 qualification with an operating temperature range of -40°C to 125°C.

Feature Summary

• AEC-Q100 qualified for automotive applications with extended temperature support
• Fully configurable dual-rail design supporting universal low-voltage translation
• Ioff circuitry prevents damaging backflow current during partial power-down
• High-speed asynchronous communication capability for dual data buses

Applications

• Telematics systems
• Instrument clusters
• Head units
• Navigation systems

Procurement Notes

Verify the specific package suffix matches the required footprint, as the PW suffix indicates a TSSOP-16 package. Confirm that the Q1 designation aligns with automotive reliability standards for the target application. Ensure input pins are held at valid logic levels to prevent excess current consumption. Validate thermal management requirements against the junction-to-ambient resistance specifications for the chosen PCB layout.

Selection Notes

Select this component when designing interfaces requiring bidirectional level shifting between disparate low-voltage logic domains in automotive environments. The dual-supply architecture allows independent optimization of A and B port voltages. Consider the propagation delay characteristics relative to the system clock speed. Verify that the 3-state output configuration meets the bus isolation requirements of the connected peripherals.

Part Context

This part belongs to the SN74AVC4T245-Q1 family of automotive bus transceivers manufactured by Texas Instruments. It is specifically engineered for high-speed data translation in vehicle electronics. The device utilizes CMOS technology to ensure low power consumption while maintaining signal integrity across varying supply conditions. It serves as a critical interface component in modern automotive networking architectures.

Replacement Considerations

SN74AVC4T245PW

FAQ

How does the device handle partial power-down scenarios?

The integrated Ioff circuitry disables the I/O output circuits when the device is powered down, preventing damaging backflow current through the device.

What is the maximum data rate supported by this transceiver?

The device supports a maximum data rate of 380Mbps when translating signals from 1.8V to 3.3V.