SN74AVCH20T245VR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74AVCH20T245VR is a 20-bit noninverting bus transceiver featuring two separate configurable power-supply rails, VCCA and VCCB. It operates within a voltage range of 1.2 V to 3.6 V for both supplies. The device supports asynchronous bidirectional data transmission between the A and B buses, controlled by DIR inputs. It utilizes a 56-pin TVSOP package and functions across an operating temperature range of -40°C to +85°C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Configurable dual-rail design allows universal low-voltage bidirectional translation between any voltage nodes from 1.2 V to 3.6 V.
• Ioff circuitry supports partial-power-down mode operation by disabling outputs to prevent damaging current backflow.
• VCC isolation feature ensures high-impedance state on both ports if either supply input is at ground potential.
• Integrated bus-hold circuitry maintains unused or undriven inputs at valid logic states without external resistors.

Buffers, Drivers, Receivers, Transceivers Applications

• Asynchronous communication between data buses
• Mixed-voltage-mode data communications
• Partial-power-down applications

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix 'VR' corresponds to the TVSOP-56 package configuration required for your layout. Confirm that the component meets RoHS standards as indicated in manufacturer documentation. Ensure compatibility with your system's voltage levels before integration.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when designing systems requiring flexible voltage translation between multiple logic families. It is suitable for applications needing isolated power domains while maintaining high-speed data transfer capabilities across varying supply voltages.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the SN74AVCH20T245 series of translating transceivers. It is part of Texas Instruments' portfolio focused on mixed-signal interface solutions, providing robust performance for complex digital systems requiring multi-voltage support.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Direct substitutes include SN74AVC20T245DGVR and SN74AVCH20T245GR. Verify pinout compatibility and electrical specifications before substitution.

Buffers, Drivers, Receivers, Transceivers FAQ

How does the VCC isolation feature function?

If either VCCA or VCCB input is connected to GND, both ports automatically enter a high-impedance state to isolate the buses.

What is the purpose of the Ioff feature?

The Ioff feature disables outputs during partial-power-down modes, preventing damaging current backflow through the device when it is powered down.