MOTOROLA

SEMICONDUCTOR TECHNICAL DATA

1

REV 4

11/96

Low-Voltage CMOS Octal

Transparent Latch

With 5V-Tolerant Inputs and Outputs

(3-State, Non-Inverting)

The MC74LCX373 is a high performance, non–inverting octal

transparent latch 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 MC74LCX373 inputs to be

safely driven from 5V devices.

The MC74LCX373 contains 8 D–type latches with 3–state outputs.

When the Latch Enable (LE) input is HIGH, data on the Dn inputs enters

the latches. In this condition, the latches are transparent, i.e., a latch

output will change state each time its D input changes. When LE is LOW,

the latches store the information that was present on the D inputs a setup

time preceding the HIGH–to–LOW transition of LE. The 3–state standard

outputs are controlled by the Output Enable (OE) input. When OE is

LOW, the standard outputs are enabled. When OE is HIGH, the standard

outputs are in the high impedance state, but this does not interfere with

new data entering into the latches.

Substantially Reduces System Power Requirements

Pinout: 20–Lead (Top View)

19

20

18

17

16

15

14

2

1

34567

VCC

13

8

12

9

11

10

O7

D7

D6

O6

O5

D5

D4

O4

LE

OE

O0

D0

D1

O1

O2

D2

D3

O3

GND

DW SUFFIX

PLASTIC SOIC

CASE 751D–04

DT SUFFIX

PLASTIC TSSOP

CASE 948E–02

20

1

20

1

M SUFFIX

PLASTIC SOIC EIAJ

CASE 967–01

20

1

SD SUFFIX

PLASTIC SSOP

CASE 940C–03

20

1

PIN NAMES

Function

Output Enable Input

Latch Enable Input

Data Inputs

3–State Latch Outputs

Pins

OE

LE

D0–D7

O0–O7

MC74LCX373

LOW–VOLTAGE

CMOS OCTAL

TRANSPARENT LATCH