SN74AVCH20T245KR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74AVCH20T245KR is a 20-bit noninverting bus transceiver featuring two separate configurable power-supply rails, VCCA and VCCB. It supports bidirectional data transmission between A and B ports based on the DIR input logic level. The device operates with supply voltages ranging from 1.2 V to 3.6 V on both rails. It provides overvoltage-tolerant I/Os rated at 4.6 V, enabling mixed-voltage-mode communications. The component includes bus-hold circuitry for inputs and an Ioff feature for partial-power-down support.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Dual-rail design allows each port to operate over the full 1.2-V to 3.6-V power-supply range.
• Overvoltage-tolerant inputs and outputs allow mixed-voltage-mode data communications.
• Ioff circuitry supports partial-power-down mode operation by disabling outputs.
• Bus hold on data inputs eliminates the need for external pullup or pulldown resistors.

Buffers, Drivers, Receivers, Transceivers Applications

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

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the package designation GQL corresponds to the specific VFBGA variant required for your PCB layout. Confirm that the ordering suffix KR matches the intended tape and reel packaging configuration. Ensure compatibility with the -40°C to 85°C operating temperature range specified for this part number before finalizing procurement orders.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when interfacing systems requiring 20-bit wide bidirectional data paths with independent voltage domains. It is suitable for applications needing configurable voltage translation between any combination of 1.2 V, 1.5 V, 1.8 V, 2.5 V, and 3.3 V nodes. Consider the VFBGA package constraints for high-density board designs.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the SN74AVCH20T245 series of dual-supply bus transceivers. It shares functional characteristics with other variants in the family, such as SN74AVCH20T245GR and SN74AVCH20T245VR, differing primarily in package type and thermal performance metrics defined by the manufacturer's standard product line.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74AVCH20T245GR (DGG Package)

Buffers, Drivers, Receivers, Transceivers FAQ

How does the VCC isolation feature function?

If either VCC input is at GND, both ports are placed in a high-impedance state to prevent backflow current.

What is the purpose of the Ioff feature?

The Ioff circuitry disables the outputs to support partial-power-down mode, preventing damaging current backflow through the device when it is powered down.