1 Features

• Fully Configurable Dual-Rail Design Allows Each

Port to Operate from 1.1 V to 5.5 V

• Robust, Glitch-Free Power Supply Sequencing

• Up to 420-Mbps Support for 3.3 V to 5.0 V

• Bus Hold on Data Inputs Eliminates the Need for

External Pull-Up and Pull-Down Resistors

• Schmitt-Trigger Control Inputs Allow for Slow or

Noisy Inputs

• Control Inputs with Integrated Static Pull-Down

Resistors Allow for Floating Control Inputs

• High Drive Strength (up to 32 mA at 5 V)

• Low Power Consumption

– 4-μA Maximum (25°C)

– 12-μA Maximum (–40°C to 125°C)

• VCC Isolation and VCC Disconnect feature

– If Either VCC Supply is < 100 mV All I/O's

Become High-Impedance

– Ioff-float Supports VCC Disconnect Operation

• Ioff Supports Partial-Power-Down Mode Operation

• Compatible with LVC Family Level Shifters

• Control Logic (DIR and OE) are Referenced to

VCCA

• Operating Temperature from –40°C to +125°C

• Latch-Up Performance Exceeds 100 mA per JESD

78, Class II

• ESD Protection Exceeds JESD 22

– 4000-V Human-Body Model

– 1000-V Charged-Device Model

2 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, and so

forth.)

3 Description

The SN74LXCH8T245 is an 8-bit, dual-supply

noninverting bidirectional voltage level translation

device with bus-hold circuitry. Ax pins and control pins

(DIR and OE) are referenced to VCCA logic levels, and

Bx pins are referenced to VCCB logic levels. The A

port is able to accept I/O voltages ranging from 1.1

V to 5.5 V, while the B port can accept I/O voltages

from 1.1 V to 5.5 V. A high on DIR allows data

transmission from A to B and a low on DIR allows

data transmission from B to A when OE is set to low.

When OE is set to high, both Ax and Bx pins are

in the high-impedance state. See Device Functional

Modes for a summary of the operation of the control

logic.