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TXB0104 4-Bit Bi-Directional Level Translator

TITXB0104 4-Bit Bi-Directional Level Translator

MPN: TXB0104RGYR
Texas Instruments
Translation - Voltage Levels 4-Bit Bi-directional V-Level Translator
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Overview

TXB0104RGYR is a 4-channel bidirectional voltage-level translator from Texas Instruments. It is used to bridge digital logic signals between devices that run at different I/O voltages without needing separate direction-control signals. The auto-direction sensing makes it useful for simple point-to-point interface links between mixed-voltage logic domains.

Why Choose This Part

This part combines four bidirectional channels in a small package, which helps reduce board area and part count in mixed-voltage designs. Auto-direction sensing removes the need for a separate DIR pin, simplifying routing and firmware coordination. It is a practical choice for short digital links where fast, low-complexity translation is more important than heavy drive strength or bus-specific features.

Applications

Mixed-voltage MCU peripherals
Connect 1.8 V, 2.5 V, or 3.3 V microcontrollers to peripherals that run at a different logic voltage.
I2C and other low-pin-count digital links
Translate short digital interfaces where automatic direction sensing simplifies wiring.
FPGA and processor I/O interfacing
Bridge GPIO lines between an FPGA or processor bank and external logic at another voltage.
Prototyping and evaluation boards
Add level shifting on breadboards, prototype PCBs, or adapter boards when two logic domains must communicate.
IoT and embedded module integration
Interface modules, sensors, and expansion boards that do not share the same supply voltage.

Key Specifications

Features Auto-Direction Sensing
Data Rate 100Mbps
Output Type Tri-State, Non-Inverted
Channel Type Bidirectional
Mounting Type Surface Mount
Package / Case 14-VFQFN Exposed Pad
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 4
Operating Temperature -40degC ~ 85degC (TA)
Supplier Device Package 14-VQFN (3.5x3.5)

Getting Started

Place the device between the two logic domains and power VCCA from the lower-voltage side and VCCB from the higher-voltage side within the supported ranges. Follow Texas Instruments application guidance for TXB-family devices, especially for trace length, bus loading, and pull-up/pull-down considerations. For bring-up, verify idle levels and edge timing with the target MCU, FPGA, or module before connecting multiple devices to the translated lines.

Also Consider

TXS0104E TITexas Instruments - A closely related 4-bit auto-direction translator that is often considered when the application is better suited to TXS-family signaling.