74AVC1T45DBVR

Overview

The SN74AVC1T45DBVR is a single-bit dual-supply bus transceiver with configurable voltage translation and 3-state outputs. It operates within a VCCA/VCCB range of 1.2V to 3.6V, supporting universal low-voltage bidirectional translation between nodes such as 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V. The device features ±12mA output drive at 3.3V, I/Os that are 4.6V tolerant, and an Ioff circuit for partial-power-down mode operation. It provides typical maximum data rates up to 500Mbps during 1.8V to 3.3V translation.

Feature Summary

• Fully configurable dual-rail design allows each port to operate over the full 1.2V to 3.6V power-supply range.
• Ioff supports partial-power-down mode operation by disabling I/O output circuits to prevent backflow current.
• VCC isolation feature ensures both ports enter a high-impedance state if either VCC input is at GND.

Applications

• Personal electronic devices
• Industrial systems
• Enterprise infrastructure
• Telecom equipment

Procurement Notes

Verify the specific ordering suffix 'DBVR' corresponds to the SOT-23-6 package and tape-and-reel shipping configuration. Confirm RoHS compliance status and ensure the component meets the required operating temperature range of -40°C to +85°C for your specific application environment.

Selection Notes

Select this component when interfacing asynchronous communication between two data buses requiring bidirectional level translation. Ensure the DIR input is powered by VCCA and that system designers account for bus contention precautions in bidirectional applications due to the absence of an explicit output-enable pin.

Part Context

This part belongs to the Texas Instruments SN74AVC1T45 family of single-bit noninverting bus transceivers. It utilizes NanoFree™ package technology, which uses the die as the package, offering compact footprint solutions for space-constrained designs while maintaining robust electrical performance across various low-voltage logic interfaces.

Replacement Considerations

SN74AVC1T45DCKR

FAQ

How does the DIR input control data flow?

A high logic level on the DIR input activates B-port outputs, transmitting data from the A bus to the B bus. A low logic level activates A-port outputs, transmitting data from the B bus to the A bus.

What is the function of the Ioff circuitry?

The Ioff circuitry disables the outputs to prevent damaging current backflow through the device when it is in a partial-power-down state.