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SN74LVC1T45DBVR

TISN74LVC1T45DBVR

Texas Instruments
Same single-bit translator in a common SOT-23-6 package for small-board layouts.
Active17,891 in stock
Datasheet Digi-Key Compare Prices

Overview

The SN74LVC1T45DBVR is a single-bit, bidirectional voltage-level translator featuring a dual-rail design that allows for independent power supplies on both ports. It supports data rates up to 420 Mbps and is designed to bridge logic signals between systems operating at different voltage levels ranging from 1.65V to 5.5V.

Why Choose This Part

This device offers high-drive CMOS push-pull outputs capable of sourcing or sinking 24mA, making it suitable for driving long PCB traces or high-capacitance loads. Its dual-rail architecture allows VCCA and VCCB to be configured independently, while the glitch-free power supply sequencing prevents signal errors during startup.

Applications

Microcontroller Interfacing
Translating 1.8V or 3.3V logic signals from low-voltage MCUs to 5V sensors or peripherals.
Mixed-Voltage Logic Systems
Bridging communication between legacy 5V systems and modern low-power SOCs.
I2C Level Shifting
Using two units to handle bidirectional level translation for SDA and SCL lines.
Partial Power-Down Isolation
Utilizing the Ioff feature to prevent backflow current when one power rail is disabled.

Key Specifications

Data Rate 420Mbps
Output Type Tri-State, Non-Inverted
Channel Type Bidirectional
Mounting Type Surface Mount
Package / Case SOT-23-6
Voltage - VCCA 1.65 V ~ 5.5 V
Voltage - VCCB 1.65 V ~ 5.5 V
Translator Type Voltage Level
Number of Circuits 1
Channels per Circuit 1
Operating Temperature -40degC ~ 85degC (TA)
Supplier Device Package SOT-23-6

Getting Started

When designing with the SOT-23-6 package, place 0.1uF bypass capacitors as close as possible to both VCCA and VCCB pins to ensure signal integrity at high speeds. The direction of translation is controlled by the DIR pin, which is typically referenced to the VCCA supply voltage.

SN74LVC1T45 Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number Package Stock
SN74LVC1T45DBVR (this part) 6-23 17,891
SN74LVC1T45DCKR TSSOP-6 199,173

Also Consider

74LVC1T45GW Nexperia - A direct functional equivalent in a small SC-88 (SOT-363) package for space-constrained layouts.
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