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TXB0108

TITXB0108

Texas Instruments
Widely used 8-bit bidirectional translator suitable for many push-pull logic applications.
Active5,349 in stock

Overview

The TXB0108 is an 8-bit bidirectional voltage-level translator featuring auto-direction sensing, designed for push-pull logic applications. It operates with a VCCA range of 1.2 V to 3.6 V and a VCCB range of 1.65 V to 5.5 V, allowing seamless communication between different voltage domains without the need for a direction-control signal.

Why Choose This Part

The TXB0108 eliminates the need for a direction-control pin, simplifying PCB routing and reducing MCU pin count requirements. It includes Vcc isolation, ensuring that if either Vcc input is at GND, all outputs enter a high-impedance state, and it features integrated ESD protection exceeding JESD 22 standards.

Applications

Microcontroller Interfacing
Connecting low-voltage MCUs (e.g., 1.8V) to higher-voltage peripherals or sensors (e.g., 3.3V or 5V).
SD Card Level Shifting
Translating signals between a host processor and SD cards operating at different logic levels.
SPI Bus Translation
Managing level conversion for high-speed SPI interfaces at data rates up to 100Mbps.
GPIO Expansion
Providing bidirectional level shifting for general-purpose I/O lines in mixed-voltage systems.

Key Specifications

Features Auto-Direction Sensing
Data Rate 100Mbps
Output Type Tri-State, Non-Inverted
Channel Type Bidirectional
Mounting Type Surface Mount
Package / Case 20-UFDFN
Voltage - VCCA 1.2 V ~ 3.6 V
Voltage - VCCB 1.65 V ~ 5.5 V
Translator Type Voltage Level
Number of Circuits 1
Channels per Circuit 8
Operating Temperature -40degC ~ 85degC (TA)
Supplier Device Package 20-USON (4x2)

Getting Started

When designing with the TXB0108, ensure the OE (Output Enable) pin is referenced to VCCA and tied to GND through a pull-down resistor until the power supplies are stable. Note that this device is optimized for push-pull CMOS outputs; avoid using it with open-drain interfaces like I2C, which require the TXS-series translators instead.

TXB0108 Family

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

Part Number Output Type Package Stock
TXB0108 (this part) Tri-State, Non-Inv.. UFDFN-20 5,349
TXB0108RUKR Push-Pull, Tri-State WFQFN-20 2,058
Also available as: TXB0108QPWRQ1, TXB0108PWR

Also Consider

TXS0108E TITexas Instruments - Recommended if your application requires open-drain signaling like I2C, as it features internal pull-up resistors.
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