74AVCAH164245GRDR

Overview

The SN74AVCAH164245 is a 16-bit dual-supply bus transceiver with configurable voltage translation and 3-state outputs. It operates with VCCA and VCCB ranging from 1.4 V to 3.6 V, supporting asynchronous communication between data buses at various voltage nodes including 1.5 V, 1.8 V, 2.5 V, and 3.3 V. The device features DOC circuitry for dynamic output impedance control, active bus-hold on data inputs, and Ioff support for partial-power-down mode. Control pins are supplied by VCCA, and the device ensures high-impedance states when either supply is at GND.

Feature Summary

• DOC circuitry dynamically changes output impedance to reduce noise without speed degradation
• Active bus-hold circuitry eliminates the need for external pullup or pulldown resistors
• Ioff circuitry supports partial-power-down mode operation to prevent damaging current backflow
• Overvoltage-tolerant inputs and outputs allow mixed-voltage-mode data communications

Applications

• Asynchronous communication between data buses
• Universal low-voltage bidirectional translation between different voltage nodes
• Mixed-voltage-mode data communications

Procurement Notes

Verify the specific package type (TSSOP DGG or TVSOP DGV) against the required PCB footprint. Confirm that the ordering suffix matches the desired reel quantity and material specifications. Ensure the design accounts for the control pins being supplied by VCCA and the requirement for OE to be tied to VCCA through a pullup resistor during power-up to ensure the high-impedance state.

Selection Notes

Select this component when designing systems requiring bidirectional level shifting between multiple low-voltage domains within the 1.4 V to 3.6 V range. The dual-supply architecture allows independent configuration of Port A and Port B. Consider the DOC feature for applications sensitive to signal integrity and noise. Verify that the operating temperature range of -40 °C to 85 °C meets the environmental requirements of the target application.

Part Context

This device belongs to the Texas Instruments Widebus family of logic ICs. It is part of the SN74AVCAH series, which focuses on advanced voltage translation capabilities. The SN74AVCAH164245 provides a 16-bit solution in a 48-pin package, offering a compact alternative to discrete level-shifting components for high-density digital interfaces.

Replacement Considerations

SN74AVCAH164245GR is the TSSOP variant. SN74AVCAH164245VR is the TVSOP variant. SN74AVCAH164245KR is the VFBGA variant. Verify pin compatibility and thermal characteristics when substituting between package types.