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SN74LVC1T45

TISN74LVC1T45

Texas Instruments
A single-bit level translator useful when you need per-line translator selection or different translator topology per signal.
Active199,173 in stock
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Overview

The SN74LVC1T45 is a single-bit, dual-rail voltage level translator designed for bidirectional communication between different logic voltage levels. It features a configurable design where both the A and B ports can operate from 1.65V to 5.5V, making it ideal for interfacing legacy 5V logic with modern 1.8V or 3.3V microcontrollers.

Why Choose This Part

This translator supports high-speed data rates up to 420Mbps and provides robust 24mA drive strength for driving capacitive loads. Its dual-rail architecture allows VCCA and VCCB to be independent, ensuring maximum flexibility in power sequencing and voltage level matching.

Applications

I2C or SPI Level Shifting
Translating clock or data lines between a high-voltage sensor and a low-voltage processor.
Mixed-Voltage GPIO Interfacing
Bridging single-bit control signals or status LEDs across different power domains.
Partial Power-Down Isolation
Using the loff feature to prevent backflow current when one power rail is disabled while the other remains active.
Directional Signal Buffering
Configuring the DIR pin to manage signal flow in systems with asymmetrical logic thresholds.

Key Specifications

Data Rate 420Mbps
Output Type Tri-State, Non-Inverted
Channel Type Bidirectional
Mounting Type Surface Mount
Package / Case 6-TSSOP, SC-88, SOT-363
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 SC-70-6

Getting Started

When integrating this part, ensure the DIR pin is tied to VCCA to define the data flow direction. For prototyping, the SN74LVC1T45DCK (SC70 package) is commonly found on small breakout boards, though bypass capacitors of 0.1uF should be placed as close as possible to both VCCA and VCCB pins.

SN74LVC1T45 Family

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

Part Number Package Stock
SN74LVC1T45 (this part) TSSOP-6 199,173
SN74LVC1T45DBVR 6-23 17,891
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