74AVCB164245GRDR

Overview

The SN74AVCB164245GRDR is a 16-bit dual-supply bus transceiver featuring configurable voltage translation and three-state outputs. It utilizes two independent power rails, VCCA and VCCB, each supporting a range from 1.4 V to 3.6 V. This architecture enables universal bidirectional data translation between various low-voltage nodes, including 1.5 V, 1.8 V, 2.5 V, and 3.3 V. The device incorporates DOC circuitry for dynamic drive capability equivalent to standard outputs with ±24 mA current ratings. It supports partial-power-down mode via Ioff circuitry and provides overvoltage-tolerant inputs and outputs.

Feature Summary

• DOC circuitry dynamically adjusts output impedance to reduce noise during signal transitions while maintaining high drive strength.
• Fully configurable dual-rail design allows both ports to operate independently across the full 1.4-V to 3.6-V supply range without speed degradation.
• Ioff circuitry disables outputs to prevent damaging backflow currents when the device is in a powered-down state.
• Overvoltage-tolerant inputs and outputs facilitate mixed-voltage-mode data communications safely.

Applications

• Asynchronous communication between data buses operating at different voltage levels
• Mixed-voltage-mode data communications systems
• Partial-power-down applications requiring isolation during power states

Procurement Notes

Verify the specific ordering suffix against the manufacturer's Package Option Addendum. The GRDR designation corresponds to the Microstar Junior BGA package. Confirm that the procurement source lists the status as obsolete or active, as availability may vary significantly based on production lifecycle updates. Ensure the component matches the required pinout and marking specifications for the intended PCB layout.

Selection Notes

Select this component when designing interfaces between logic families operating at distinct voltage levels within the 1.4 V to 3.6 V range. The dual-supply architecture is essential for applications requiring flexible voltage translation without external level shifters. Consider the DOC feature for high-speed signals where electromagnetic interference reduction is critical. Verify that the control inputs are referenced correctly to the appropriate VCC rail for proper direction and enable logic.

Part Context

This device belongs to Texas Instruments' Widebus family of bus transceivers. It is part of the SN74AVCB series, which focuses on advanced voltage translation capabilities. The GRDR variant specifically denotes the Microstar Junior BGA packaging format. Related versions include TSSOP and TVSOP packages, offering alternative form factors for different board space constraints while maintaining identical electrical performance characteristics.

Replacement Considerations

The SN74AVCB164245GRDR is listed as obsolete. Potential replacements include the SN74AVCB164245GR (TSSOP) or SN74AVCB164245VR (TVSOP), provided the package footprint can be adapted. Verify functional equivalence regarding voltage ranges and drive capabilities before substitution.