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LSF0108RKSR

TILSF0108RKSR

Texas Instruments
Translation - Voltage Levels Octal Bidir Multi- V ltg Lev Translator
249 in stock
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Overview

The LSF0108RKSR is an 8-bit bidirectional multi-voltage level translator from Texas Instruments designed for open-drain and push-pull applications. It enables seamless communication between components operating on different voltage rails, supporting translation from 1.0V up to 5.0V without the need for a direction-control pin.

Why Choose This Part

The LSF0108 supports high-speed translation up to 100MHz for push-pull systems and allows for different voltage levels on each of the eight channels simultaneously. Its bidirectional nature without a direction-control pin simplifies PCB routing and reduces MCU pin count requirements.

Applications

I2C Level Shifting
Translating SDA and SCL signals between 1.8V microcontrollers and 3.3V or 5V sensors in complex I2C topologies.
MDIO/SMBus Interfacing
Interfacing networking management data input/output lines across disparate power domains in telecommunications equipment.
GPIO Expansion
Connecting low-voltage SoC GPIO pins to high-voltage peripherals or legacy logic systems.
SD Card Interfacing
Shifting high-speed signals between a 1.8V processor interface and a 3.3V SD card power rail.

Getting Started

When designing with the LSF0108, ensure that appropriate pull-up resistors are selected based on the desired data rate and bus capacitance, especially for open-drain protocols like I2C. The LSF0108EVM evaluation module is available to test signal integrity and propagation delays across various voltage combinations.

LSF0108 Family

Part NumberDifferenceStock
LSF0108QPWRQ1 TSSOP-20 4,612

Also Consider

TXS0108EPWR TITexas Instruments - A common alternative for open-drain and push-pull applications that includes internal pull-up resistors to simplify BOM.
TXB0108PWR TITexas Instruments - Optimized specifically for push-pull CMOS outputs with automatic direction sensing but not recommended for I2C.