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LSF0108QT20-13

DIOLSF0108QT20-13

Diodes Incorporated
Translation - Voltage Levels ULS TSSOP-20 T&R 4K
Active4,750 in stock
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Overview

The LSF0108QT20-13 is an 8-channel bidirectional multi-voltage level translator designed for high-speed digital systems. It enables seamless data transfer between components operating at different supply rails, supporting a wide translation range from 0.65V up to 5.5V without the need for a direction control pin.

Why Choose This Part

The LSF0108 features an auto-bidirectional architecture with low Ron, which minimizes signal distortion and eliminates the firmware overhead of managing direction pins. It supports very high-frequency operation (up to 100 MHz) and offers a low standby current of 1.5 uA for power-sensitive designs.

Applications

High-Speed Bus Translation
Ideal for shifting levels on SPI and SDIO buses at speeds exceeding 100 MHz under low capacitive loads.
Mixed-Voltage Logic Interfacing
Connects low-voltage processors (0.8V to 1.8V) to legacy 3.3V or 5V peripherals like sensors and displays.
Open-Drain Communication
Standardized for I2C, SMBus, and PMBus applications requiring pull-up resistors across multiple voltage domains.
System Management Monitoring
Used for UART and MDIO interfaces in networking equipment to bridge control plane logic voltages.

Key Specifications

Output Type Open Drain, Push-Pull, Tri-State
Channel Type Bidirectional
Mounting Type Surface Mount
Package / Case 20-TSSOP (0.173", 4.40mm Width)
Voltage - VCCA 0.65 V ~ 4.5 V
Voltage - VCCB 1.5 V ~ 5.5 V
Translator Type Voltage Level
Number of Circuits 1
Channels per Circuit 8
Operating Temperature -40degC ~ 125degC (TA)
Supplier Device Package 20-TSSOP

Getting Started

When designing with the LSF0108, ensure that the VCCB rail is at least 0.8V higher than VCCA for proper operation. Place pull-up resistors on the I/O lines to define the logic high levels, as the device uses a pass-gate architecture that requires external biasing for open-drain or push-pull translation.

Also Consider

TXS0108E TITexas Instruments - A common alternative with internal pull-up resistors specifically optimized for open-drain applications like I2C.
TXB0108 TITexas Instruments - Best for push-pull interfaces where external pull-up resistors are not desired, though not recommended for I2C.
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