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SEMICONDUCTOR TECHNICAL DATA

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Low-Voltage CMOS Octal

Transceiver

With 5V-Tolerant Inputs and Outputs

(3-State, Non-Inverting)

The MC74LCX2245 is a high performance, non–inverting octal

transceiver operating from a 2.7 to 3.6V supply. High impedance TTL

compatible inputs significantly reduce current loading to input drivers

while TTL compatible outputs offer improved switching noise

performance. A VI specification of 5.5V allows MC74LCX2245 inputs to

be safely driven from 5V devices. The MC74LCX2245 is designed to

reduce output overshoot and undershoot and is suitable for memory

address driving and all TTL level bus oriented transceiver applications;

especially those requiring the very quiet outputs.

Current drive capability is 12mA at both A and B ports. The

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

through the bi–directional transceiver. Transmit (active–HIGH) enables

data from A ports to B ports; Receive (active–LOW) enables data from B

to A ports. The Output Enable input, when HIGH, disables both A and B

ports by placing them in a HIGH Z condition.

Substantially Reduces System Power Requirements

Figure 1. 20–Lead Pinout

(Top View)

19

20

18

17

16

15

14

2

1

34567

VCC

13

8

12

9

11

10

OE

B0

B1

B2

B3

B4

B5

B6

B7

T/R

A0

A1

A2

A3

A4

A5

A6

A7

GND

This document contains information on a product under development. Motorola reserves the right to change or

discontinue this product without notice.

DW SUFFIX

20–LEAD PLASTIC SOIC

CASE 751D–04

DT SUFFIX

20–LEAD PLASTIC TSSOP

CASE 948E–02

M SUFFIX

20–LEAD PLASTIC SOIC EIAJ

CASE 967–01

SD SUFFIX

20–LEADPLASTIC SSOP

CASE 940C–03

MC74LCX2245

LOW–VOLTAGE CMOS

OCTAL TRANSCEIVER

PIN NAMES

Function

Output Enable Input

Transmit/Receive Input

Side A 3–State Inputs or 3–State

Outputs

Side B 3–State Inputs or 3–State

Outputs

Pins

OE

T/R

A0–A7

B0–B7