74AVCBH164245GRG4

Overview

The SN74AVCBH164245GRG4 is a 16-bit dual-supply bus transceiver with configurable voltage translation and 3-state outputs. It operates within a supply voltage range of 1.4 V to 3.6 V on both ports. The device supports asynchronous communication between data buses, transmitting data bidirectionally based on the DIR input level. It features dynamic output control (DOC) circuitry for noise reduction without speed degradation. The component includes active bus-hold circuitry to maintain valid logic levels on floating inputs.

Feature Summary

• Supports partial-power-down mode via Ioff circuitry to prevent damaging backflow currents
• Features fully configurable dual-rail design allowing dynamic changes to output impedance
• Includes active bus-hold circuitry to eliminate the need for external pullup or pulldown resistors

Applications

• Asynchronous communication between data buses
• Mixed-voltage-mode data communications
• Universal low-voltage bidirectional translation between 1.5-V, 1.8-V, 2.5-V, and 3.3-V nodes

Procurement Notes

Verify the specific ordering suffix 'G4' against the latest Package Option Addendum to confirm lead finish and environmental compliance status. Ensure the TSSOP-48 package dimensions match the target PCB footprint requirements. Confirm that the operating temperature range of -40°C to +85°C aligns with the system's thermal constraints before finalizing procurement.

Selection Notes

Select this component when designing systems requiring flexible voltage translation between different logic families. The dual-supply architecture allows independent configuration of A and B ports. Consider the DOC circuitry benefits for high-speed applications where signal integrity is critical. Verify that the control inputs are supplied by VCCB as specified in the functional description.

Part Context

This part belongs to the Widebus family from Texas Instruments. It is a noninverting bus transceiver designed for universal low-voltage bidirectional translation. The device utilizes two separate configurable power-supply rails, enabling it to track VCCA and VCCB independently across the full 1.4-V to 3.6-V range.

Replacement Considerations

SN74AVCBH164245GR

FAQ

How does the device handle unused or floating data inputs?

Active bus-hold circuitry holds unused or floating data inputs at a valid logic level, eliminating the need for external pullup or pulldown resistors.

What happens if either VCC input is at GND?

If either VCC input is at GND, both ports are placed in the high-impedance state.