74AVCAH164245ZQLR

Overview

The SN74AVCAH164245 is a 16-bit dual-supply bus transceiver with configurable voltage translation and 3-state outputs. It supports VCCA and VCCB supply voltages ranging from 1.4 V to 3.6 V, enabling bidirectional data transfer between any low-voltage nodes (1.5 V, 1.8 V, 2.5 V, or 3.3 V). The device features DOC circuitry for dynamic output impedance control, active bus-hold inputs, and Ioff support for partial-power-down mode. Operating temperature range is -40 °C to +85 °C.

Feature Summary

• DOC circuitry dynamically adjusts output impedance to reduce noise without degrading speed
• Active bus-hold circuitry maintains valid logic levels on floating data inputs
• Ioff circuitry disables outputs to prevent backflow current during power-down
• Control input thresholds are referenced to the VCCA supply rail

Applications

• Asynchronous communication between data buses
• Mixed-voltage-mode data communications
• Partial-power-down applications requiring high-impedance isolation

Procurement Notes

Verify the specific package variant against design requirements. The datasheet lists SN74AVCAH164245GR (TSSOP), SN74AVCAH164245VR (TVSOP), and SN74AVCAH164245KR (VFBGA) as production parts. Ensure the ordering suffix matches the required footprint and thermal characteristics for the target PCB layout.

Selection Notes

Select this component when interfacing asynchronous buses operating at different voltage levels within the 1.4 V to 3.6 V range. The dual-rail design allows independent configuration of Port A and Port B supplies. Verify that the application requires the specific DOC drive capability and bus-hold functionality provided by this Widebus family member.

Part Context

This device belongs to the Texas Instruments Widebus family of level-shifting transceivers. It utilizes advanced CMOS technology to provide universal low-voltage bidirectional translation. The architecture supports noninverting data transmission controlled by DIR and OE inputs, facilitating flexible system integration in mixed-voltage environments.

Replacement Considerations

Public confirmed substitute part numbers: SN74AVCBH164245GR, SN74ALVC164245DGG-QJ.