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SN74LVC1T45DCKR

TISN74LVC1T45DCKR

Texas Instruments
Alternate package option of the same part family if you need a different SMD footprint or assembly format.
Active199,173 in stock
Datasheet Digi-Key Compare Prices

Overview

The SN74LVC1T45DCKR is a single-bit, dual-supply transceiver designed for asynchronous communication between data buses operating at different voltage levels. It features a tri-state output and a non-inverted channel, supporting high data rates up to 420 Mbps. Its fully configurable dual-rail design and Vcc isolation feature make it suitable for a wide range of voltage translation applications.

Why Choose This Part

This transceiver offers robust ESD protection and a Vcc isolation feature, enhancing system reliability. Its lOff support enables partial-power-down mode operation, reducing power consumption. The balanced High-Drive CMOS Push-Pull Outputs and glitch-free power supply sequencing ensure stable and reliable data transfer.

Applications

Voltage Level Translation
Translating data signals between systems operating at different supply voltage levels (e.g., 3.3V to 5V or 1.8V to 3.3V) in a bidirectional manner.
Data Bus Isolation
Providing isolation and level shifting for data lines in mixed-voltage systems to ensure signal integrity and prevent damage during power-down sequences.
GPIO Expansion
Extending the usable GPIO range of microcontrollers by interfacing with peripherals that require different voltage levels.
UART and SPI Interfaces
Implementing voltage translation for UART and SPI communication lines, allowing devices with incompatible voltage levels to communicate reliably.
Memory Interface Level Shifting
Adapting data signals for memory interfaces where the host controller and memory modules operate at different supply voltages.

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

To use the SN74LVC1T45, connect VCCA to the supply voltage of Port A and VCCB to the supply voltage of Port B. The DIR pin, referenced to VCCA, controls the data flow direction. Ensure proper decoupling capacitors are used on both VCCA and VCCB power rails to maintain stable operation. The device can be integrated into existing PCBs using standard surface mount assembly techniques for its SC70 (DCK) package.

SN74LVC1T45 Family

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

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

Also Consider

SN74LVC1T45DBVR TITexas Instruments - This is a similar single-bit, dual-supply transceiver from the same family but offered in a SOT-23 (DBV) package, which may suit different PCB footprints or assembly requirements.
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