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SN74AXCH4T245PWR

TISN74AXCH4T245PWR

Texas Instruments
Translation Transceiver 2 Element 2 Bit per Element 3-State Output 16-TSSOP
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Overview

The SN74AXCH4T245PWR is a 4-bit, non-inverting bus transceiver that utilizes two separate configurable power-supply rails to bridge signals between 0.65V and 3.6V. This dual-rail design allows for seamless level translation between different voltage domains while maintaining 12mA of drive strength at high or low states.

Why Choose This Part

The integrated bus-hold feature eliminates the need for external pull-up or pull-down resistors on unused or floating data inputs, saving board space. It supports glitch-free power sequencing and is fully compatible with the older AVC family level shifters while offering a wider voltage range down to 0.65V.

Applications

GPIO Voltage Translation
Interfacing low-voltage microcontrollers (down to 0.65V) with standard 1.8V, 2.5V, or 3.3V logic peripherals.
Mixed-Voltage Bus Isolation
Providing Vcc isolation in systems where a bus must be disabled or high-impedance when one power rail is powered down.
Partial-Power-Down Mode
Utilizing Ioff circuitry to prevent damaging backflow current when the device is powered off, ideal for energy-sensitive segments.

Key Specifications

Logic Type Translation Transceiver
Output Type 3-State
Mounting Type Surface Mount
Package / Case 16-TSSOP (0.173", 4.40mm Width)
Voltage - Supply 0.65V ~ 3.6V
Number of Elements 2
Operating Temperature -40degC ~ 125degC (TA)
Supplier Device Package 16-TSSOP
Current - Output High, Low 12mA, 12mA
Number of Bits per Element 2

Getting Started

When designing with this transceiver, ensure that VccA and VccB are decoupled with 0.1uF capacitors placed close to the pins. Since this is a bit-configurable device with direction control pins, verify the logic levels of DIR1 and DIR2 to set the data flow direction correctly for each 2-bit element.

Also Consider

SN74AXC4T245PWR TITexas Instruments - This is the version without bus-hold circuitry if external resistors or active driving are preferred.
TXB0104RGYR TITexas Instruments - Offers automatic direction sensing for applications where dedicated direction control pins are not available.

Categories

Interface ICs > Level Shifters