© Semiconductor Components Industries, LLC, 2011

May, 2011 − Rev. 5

1

Publication Order Number:

MC74VHCT373A/D

MC74VHCT373A

Octal D-Type Latch

with 3-State Output

The MC74VHCT373A is an advanced high speed CMOS octal latch

with 3−state output fabricated with silicon gate CMOS technology. It

achieves high speed operation similar to equivalent Bipolar Schottky

TTL while maintaining CMOS low power dissipation.

This 8−bit D−type latch is controlled by a latch enable input and an

output enable input. When the output enable input is high, the eight

outputs are in a high impedance state.

The internal circuit is composed of three stages, including a buffer

output which provides high noise immunity and stable output.

The VHCT inputs are compatible with TTL levels. This device can

be used as a level converter for interfacing 3.3 V to 5.0 V, because it

has full 5.0 V CMOS level output swings.

The VHCT373A input and output (when disabled) structures

provide protection when voltages between 0 V and 5.5 V are applied,

regardless of the supply voltage. These input and output structures

help prevent device destruction caused by supply

voltage−input/output voltage mismatch, battery backup, hot insertion,

etc.

Features

Human Body Model > 2000 V;

Machine Model > 200 V

http://onsemi.com

See detailed ordering and shipping information in the package

dimensions section on page 4 of this data sheet.

ORDERING INFORMATION

MARKING

DIAGRAMS

20

1

TSSOP−20

SUFFIX DT

CASE 948E

SOIC−20WB

SUFFIX DW

CASE 751D

VHCT

373A

ALYWG

G

1

1

20

1

VHCT373A

AWLYYWWG

A

= Assembly Location

WL, L

= Wafer Lot

YY, Y

= Year

WW, W = Work Week

G or G

= Pb−Free Package

(Note: Microdot may be in either location)

OE

LE

Q

L

L

L

H

H

H

L

X

H

L

No Change

Z

INPUTS

OUTPUT

FUNCTION TABLE

D

H

L

X

X