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SN74AXC4T245PWR

TISN74AXC4T245PWR

Texas Instruments
Translation - Voltage Levels 4-bit dual-supply bu s transceiver 16-TS
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Overview

The SN74AXC4T245PWR is a 4-bit, dual-supply bus transceiver designed for asynchronous communication between data buses operating at different voltage levels. It features two independent supply rails, allowing for bidirectional level translation between voltages as low as 0.65V and as high as 3.6V. This component is specifically engineered to handle ultra-low voltage interfaces common in modern power-efficient digital systems.

Why Choose This Part

The device provides a wide supply range from 0.65V to 3.6V, ensuring compatibility with the latest sub-1V logic nodes. It includes Ioff circuitry which supports partial-power-down mode, preventing damaging backflow current when one supply is disabled. Its dual-rail architecture allows each port to track its own supply, maximizing signal integrity across different voltage domains.

Applications

Inter-Processor Communication
Bridging 1.2V application processors with 1.8V or 3.3V peripherals such as sensors or wireless modules.
FPGA and CPLD Interfacing
Level shifting high-speed GPIO signals between low-voltage FPGA banks and legacy 2.5V or 3.3V logic.
SD Card and Memory Interfacing
Translating control and data lines for memory components that require specific I/O voltage standards different from the host MCU.
Standard Bus Translation
Bidirectional translation for simple buses like SPI, UART, or JTAG where direction is controlled via external pins.

Getting Started

To use this transceiver, connect the VCCA and VCCB pins to your respective supply rails and ensure the DIR and OE pins are tied to appropriate logic levels for your signal flow. Since this is a leadless or small-pitch TSSOP package, ensure your PCB layout includes decoupling capacitors as close to the supply pins as possible. Evaluation can be performed using the SN74AXC4T245EVM evaluation module from Texas Instruments.