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54LVX4245 8-Bit Dual Supply Translating Transceiver with TRI-STATE Outputs

January 1999

54LVX4245

8-Bit Dual Supply Translating Transceiver with

TRI-STATE

廬

Outputs

General Description

The LVX4245 is a dual-supply, 8-bit translating transceiver

that is designed to interface between a 5V bus and a 3V bus

in a mixed 3V/5V supply environment. The Transmit/Receive

(T/R) input determines the direction of data flow. Transmit

(active-HIGH) enables data from A ports to B ports; Receive

(active-LOW) enables data from B ports to A ports. The Out-

put Enable input, when HIGH, disables both A and B ports by

placing them in a TRI-STATE condition. The A port interfaces

with the 5V bus; the B port interfaces with the 3V bus.

The LVX4245 is suitable for mixed voltage applications such

as systems using 3.3V memories which must interface with

existing buses or other components operating at 5.0V.

Features

n

n

n

n

n

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Bidirectional interface between 5V and 3V buses

Control inputs compatible with TTL level

5V data flow at A port and 3V data flow at B port

Outputs source/sink 24 mA

Available in Ceramic DIP and Flatpack packages

Implements patented EMI reduction circuitry

Functionally compatible with the 54 series 245

Standard Microcircuit Drawing (SMD) 5962-9860601

Ordering Code

Order Number

54LVX4245J-QML

54LVX4245W-QML

Package Number

J24F

W24C

24-Lead Cerpack

Package Description

24-Lead Ceramic Dual-in-line

Logic Symbol

Connection Diagram

Pin Assignment for

CDIP and Cerpack

DS101021-1

Pin Descriptions

Pin Names

OE

T/R

A

0

鈥揂

7

B

0

鈥揃

7

Description

Output Enable Input

Transmit/Receive Input

Side A Inputs or TRI-STATE Outputs

Side B Inputs or TRI-STATE Outputs

DS101021-2

TRI-STATE

廬

is a registered trademark of National Semiconductor

漏 1999 National Semiconductor Corporation

DS101021

www.national.com

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