SN74AVCH16T245VR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74AVCH16T245 is a 16-bit dual-supply noninverting bus transceiver with configurable level-shifting and tri-state outputs. It supports VCCA and VCCB supply voltages ranging from 1.2 V to 3.6 V, enabling universal bidirectional translation between any low-voltage nodes including 1.2 V, 1.5 V, 1.8 V, 2.5 V, and 3.3 V. The device features overvoltage-tolerant I/Os up to 4.6 V, active bus-hold circuitry, and an Ioff circuit for partial-power-down mode. Maximum data rates reach 380 Mbps at 1.8 V to 3.3 V levels.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Configurable dual-rail design allows independent operation of ports across the full 1.2 V to 3.6 V power-supply range.
• Overvoltage-tolerant inputs and outputs support mixed voltage-mode data communications without external components.
• Active bus-hold circuitry maintains valid logic states on unused or undriven inputs, eliminating the need for external pullup or pulldown resistors.

Buffers, Drivers, Receivers, Transceivers Applications

• Personal electronics
• Industrial systems
• Enterprise infrastructure
• Telecommunications equipment

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific package suffix (VR indicates TVSOP-48) against the required footprint. Confirm RoHS compliance status as some variants may differ. Ensure ESD handling protocols are followed given the sensitivity of CMOS logic. Cross-reference the datasheet revision date to ensure alignment with current manufacturing specifications.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when asynchronous communication between buses operating at different voltage levels is required. The dual-supply architecture accommodates varying logic families. Consider the propagation delay characteristics relative to the target clock frequency and load capacitance. Verify that the control pins are driven by the VCCA rail for proper functionality.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the Texas Instruments SN74AVCH series of advanced CMOS logic. It is designed specifically for high-speed data transmission in environments requiring flexible voltage translation. The 16-bit width reduces board space compared to using multiple 8-bit transceivers. It serves as a bridge between legacy and modern low-voltage digital systems.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Check for pin-compatible alternatives within the same logic family if package availability is constrained. Ensure substitute parts maintain the 1.2 V to 3.6 V operating range and similar propagation delays. Verify that any replacement also supports the required Ioff and VCC isolation features for system safety.

Buffers, Drivers, Receivers, Transceivers FAQ

How does the VCC isolation feature function?

If either VCCA or VCCB input is at GND, both ports enter a high-impedance state. This prevents false logic levels from appearing on either bus during power sequencing or fault conditions.

What is the purpose of the Ioff circuitry?

The Ioff circuit disables the outputs to prevent damaging current backflow through the device when it is in a partial-power-down mode. This ensures safe operation when one side of the bus is powered while the other is not.