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1 Features

? Bidirectional voltage translator

? 5.5 V on A port and 2.7 V to 3.6 V on B port

? Control inputs VIH/VIL levels are referenced to

VCCA voltage

? Latch-up performance exceeds 250 mA per JESD

17

? ESD protection exceeds JESD 22

– 2000-V Human-Body Model

– 1000-V Charged-Device Model

2 Applications

? ATCA solutions

? CPAP machines

? Cameras: surveillance analog

? Chemical or gas sensors

? CT scanners

? DLP 3D machine vision and optical networking

? Digital signage

? ECGs: electrocardiograms

? Field transmitters: pressure sensors and

temperature sensors

? High-speed data acquisition and generation

? HMI (human machine interface)

? RF4CE remote controls

? Server motherboards

? Software defined radios (SDR)

? Wireless LAN cards and data access cards

? X-ray: medical, dental, and baggage scanners

3 Description

This 8-bit (octal) noninverting bus transceiver contains

two separate supply rails; B port has VCCB, which is

set at 3.3 V, and A port has VCCA, which is set at 5

V. This allows for translation from a 3.3-V to a 5-V

environment, and vice versa.

The SN74LVC4245A device is designed for

asynchronous communication between data buses.

The device transmits data from the A bus to the

B bus or from the B bus to the A bus, depending

on the logic level at the direction-control (DIR) input.

The output-enable (OE) input can be used to disable

the device so the buses are effectively isolated. The

control circuitry (DIR, OE) is powered by VCCA.

The SN74LVC4245A device terminal out allows the

designer to switch to a normal all-3.3-V or all-5-V

20-terminal SN74LVC4245 device without board relayout.

The designer uses the data paths for pins 2–

11 and 14–23 of the SN74LVC4245A device to align

with the conventional '245 terminal out.