SN74LXC8T245PWR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74LXC8T245 is an 8-bit dual-supply noninverting bidirectional voltage level translation device with configurable level shifting and 3-state outputs. It supports supply voltages from 1.1 V to 5.5 V on both ports, enabling flexible interface between diverse logic families. The device achieves data rates up to 420 Mbps for 3.3 V to 5.0 V applications. Key electrical characteristics include Schmitt-trigger inputs for noise immunity, high drive strength of 32 mA at 5 V, and low power consumption with a maximum quiescent current of 4 µA at 25°C. It features VCC isolation and Ioff support for partial-power-down modes.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Fully configurable dual-rail design allows each port to operate from 1.1 V to 5.5 V
• Robust, glitch-free power supply sequencing ensures reliable operation during power transitions
• Schmitt-trigger inputs provide tolerance for slow or noisy input signals
• I/Os feature integrated dynamic pull-down resistors to reduce external component count

Buffers, Drivers, Receivers, Transceivers Applications

• Eliminate slow or noisy input signals
• Driving indicator LEDs or buzzers
• Debouncing a mechanical switch
• General purpose I/O level shifting
• Push-pull level shifting (UART, SPI, JTAG)

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific package variant required, as the SN74LXC8T245 is available in TSSOP-24, VSSOP-24, VQFN-24, and UQFN-24 configurations. Confirm that the selected part number suffix matches the desired physical footprint and thermal pad requirements. Ensure compatibility with the target PCB layout guidelines provided in the datasheet regarding ground plane connections and trace routing for optimal signal integrity.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when interfacing systems with widely varying voltage domains, such as connecting 1.1 V devices to 5.5 V buses. The integrated Schmitt triggers make it suitable for environments with significant signal noise or slow rise/fall times. Consider the high drive capability if driving capacitive loads like LEDs or long traces. Verify that the control logic reference voltage aligns with the VCCA supply rail for proper DIR and OE functionality.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to Texas Instruments' LXC family of translating transceivers, designed specifically for robust voltage translation across broad ranges. Unlike standard level shifters, the LXC series emphasizes glitch-free sequencing and high noise immunity through Schmitt-trigger inputs. It serves as a bridge between legacy 5 V systems and modern low-voltage digital logic, ensuring signal integrity without requiring complex external circuitry.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74LVC8T245PWR

Buffers, Drivers, Receivers, Transceivers FAQ

How does the device handle floating control inputs?

Control inputs (DIR and OE) have integrated static pull-down resistors, which prevent them from floating and ensure a defined state even when not actively driven by an external device.

What happens if one of the supply rails disconnects?

The VCC isolation and Vcc disconnect (Ioff-float) feature automatically pulls all I/Os down and places them in a high-impedance state if either VCCA or VCCB drops below 100 mV or becomes disconnected.