74AVCBH164245ZQLR

Overview

The SN74AVCBH164245ZQLR is a 16-bit dual-supply bus transceiver with configurable voltage translation and 3-state outputs. It operates over a supply range of 1.4 V to 3.6 V on both ports, supporting asynchronous bidirectional data communication between buses. The device features dynamic output control (DOC) circuitry for noise reduction without speed degradation. It includes active bus-hold circuitry to eliminate external pullup/pulldown resistors and supports partial-power-down mode via Ioff circuitry. Control inputs are referenced to the VCCB voltage level.

Feature Summary

• Supports partial-power-down mode using Ioff circuitry to prevent damaging current backflow when powered down
• Dynamic Output Control (DOC) circuitry reduces noise by dynamically adjusting output impedance during signal transitions
• Active bus-hold circuitry maintains unused or floating data inputs at valid logic levels without external components
• Overvoltage-tolerant inputs and outputs enable mixed-voltage-mode data communications across different supply rails

Applications

• Asynchronous communication between data buses operating at different voltage nodes
• Universal low-voltage bidirectional translation between 1.5-V, 1.8-V, 2.5-V, and 3.3-V systems
• Mixed-voltage-mode data communications requiring overvoltage tolerance

Procurement Notes

Verify the specific package marking WBH4245 corresponds to the ZQL suffix variant. Confirm the orderable part number matches SN74AVCBH164245ZQLR for tape and reel delivery. Ensure the design accommodates the 56-ball GQL/ZQL package dimensions and thermal requirements specified in the datasheet.

Selection Notes

Select this component when designing interfaces between asynchronous buses requiring flexible voltage translation within the 1.4-V to 3.6-V range. The DOC feature is suitable for applications prioritizing signal integrity and noise reduction. Verify that the control input reference to VCCB aligns with the system's power sequencing and logic level requirements.

Part Context

This device belongs to the Texas Instruments Widebus family of bus transceivers. It is designed specifically for dual-rail configurations where independent power supplies track A-port and B-port operations. The architecture allows for universal translation capabilities among common low-voltage standards used in portable and embedded electronics.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.