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SN74LVC1T45DRLR

TISN74LVC1T45DRLR

Texas Instruments
Voltage Level Translator Bidirectional 1 Circuit 1 Channel 420Mbps SOT-5X3
NRND45,187 in stock
Datasheet Digi-Key Mouser Compare Prices

Overview

The SN74LVC1T45DRLR is a single-bit, dual-supply bidirectional voltage level translator designed for high-speed data communication up to 420 Mbps. It features two independent power rails, VCCA and VCCB, allowing for seamless translation between 1.65 V and 5.5 V logic levels. The device uses a direction control pin (DIR) to determine signal flow and includes Ioff circuitry for partial-power-down protection.

Why Choose This Part

The wide 1.65 V to 5.5 V operating range on both supply rails provides maximum flexibility for multi-voltage systems. It supports partial-power-down mode (Ioff), preventing damaging backflow current when the device is powered down. Additionally, the high-speed capability of 420 Mbps ensures it does not become a bottleneck in fast communication interfaces.

Applications

Mixed-Voltage MCU Interfacing
Bridges 1.8V low-power microcontrollers with 3.3V or 5V legacy sensors and peripherals.
High-Speed Data Buffering
Provides signal integrity and level shifting for high-speed buses like SPI or UART reaching up to 420 Mbps.
I/O Isolation
Utilizes the Vcc isolation feature where if either Vcc input is at GND, both ports enter a high-impedance state.
Mobile Device Logic
The ultra-small SOT-5X3 package and low 4uA standby current make it ideal for battery-operated personal electronics.

Key Specifications

Data Rate 420Mbps
Output Type Tri-State, Non-Inverted
Channel Type Bidirectional
Mounting Type Surface Mount
Package / Case SOT-563, SOT-666
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-5X3

Getting Started

To implement this part, connect VCCA to the logic level of the control side (DIR) and VCCB to the secondary rail; ensure bypass capacitors are placed near both supply pins. The DRL (SOT-5X3) package requires precise SMT placement due to its small 1.6mm x 1.2mm footprint. For prototyping, look for SOT-563 to DIP breakout boards to use with standard breadboards.

Part of SN74 Level Translators family » SN74LVC1T45

SN74LVC1T45 Family

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

Part Number Package Stock
SN74LVC1T45DRLR (this part) SOT-563, SOT-666 45,187
SN74LVC1T45DCKR TSSOP-6 199,173
SN74LVC1T45DBVR 6-23 17,891

Also Consider

TXB0101DRLR TITexas Instruments - Offers auto-direction sensing, eliminating the need for a DIR control pin for low-drive applications.
74LVC1T45GW Nexperia - A pin-compatible alternative in the larger, more common SOT-363 (SC-88) package for easier assembly.