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SN74LVCH8T245PWR

TISN74LVCH8T245PWR

Texas Instruments
Translation Transceiver 1 Element 8 Bit per Element 3-State Output 24-TSSOP
NRND6,827 in stock
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Overview

The SN74LVCH8T245PWR is an 8-bit, dual-rail bus transceiver designed for asynchronous communication between data buses operating at different voltage levels. It features a fully configurable design that allows each port to operate across a wide supply range from 1.65V to 5.5V, making it ideal for bridging legacy 5V systems with modern low-voltage logic. The integrated active bus-hold circuitry also eliminates the need for external pull-up or pull-down resistors on unused or floating inputs.

Why Choose This Part

This transceiver provides high-drive CMOS push-pull outputs capable of 32mA, ensuring signal integrity over longer PCB traces. The inclusion of bus-hold circuitry maintains the last known state of the input, reducing power consumption and component count by removing external resistors. Its dual-rail architecture allows independent voltage scaling on both sides for maximum design flexibility.

Applications

Voltage Level Translation
Bidirectional data transfer between microcontrollers and peripherals operating at mismatched logic levels such as 1.8V, 3.3V, and 5V.
Inter-Processor Communication
Connecting a low-voltage application processor to a high-voltage industrial baseband or co-processor.
Isolated Subsystem Interfacing
Utilizing the Vcc isolation feature to ensure that if one Vcc input is at ground, both ports are in a high-impedance state to prevent backflow.
Partial-Power-Down Applications
Using Ioff circuitry to disable outputs when the device is powered down, preventing damaging current backflow into the device.

Key Specifications

Logic Type Translation Transceiver
Output Type 3-State
Mounting Type Surface Mount
Package / Case 24-TSSOP (0.173", 4.40mm Width)
Voltage - Supply 1.65V ~ 5.5V
Number of Elements 1
Operating Temperature -40degC ~ 85degC (TA)
Supplier Device Package 24-TSSOP
Current - Output High, Low 32mA, 32mA
Number of Bits per Element 8

Getting Started

To implement this part, connect the A-port and B-port to their respective power rails (VCCA and VCCB) and ensure decoupling capacitors are placed near the supply pins. Direction is controlled by the DIR pin, while the Output Enable (OE) pin allows for 3-state isolation during power-up or system reset. For prototyping, utilize a TSSOP-24 to DIP adapter board or a dedicated level-shifter breakout module.

Also Consider

SN74LVC8T245PWR TITexas Instruments - This is the standard version without the bus-hold circuitry, suitable for applications where external pull-up resistors are preferred.

Categories

Interface ICs > Level Shifters