© 2005 Fairchild Semiconductor Corporation

DS011555

www.fairchildsemi.com

February 1993

Revised April 2005

74VHC373

Octal D-Type Latch with 3-STATE Outputs

General Description

The VHC373 is an advanced high speed CMOS octal D-

type latch with 3-STATE output fabricated with silicon gate

CMOS technology. It achieves the high speed operation

similar to equivalent Bipolar Schottky TTL while maintain-

ing the CMOS low power dissipation. This 8-bit D-type

latch is controlled by a latch enable input (LE) and an out-

put enable input (OE). The latches appear transparent to

data when latch enable (LE) is HIGH. When LE is LOW, the

data that meets the setup time is LATCHED. When the OE

input is HIGH, the eight outputs are in a high impedance

state.

An input protection circuit ensures that 0V to 7V can be

applied to the input pins without regard to the supply volt-

age. This device can be used to interface 5V to 3V systems

and two supply systems such as battery back up. This cir-

cuit prevents device destruction due to mismatched supply

and input voltages.

Features

s Power Down Protection is provided on all inputs

s Pin and Function Compatible with 74HC373

Ordering Code:

Surface mount packages are also available on Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

Pb-Free package per JEDEC J-STD-020B.

Logic Symbol

IEEE/IEC

Connection Diagram

Order Number

Package Number

Package Description

74VHC373M

M20B

20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide

74VHC373SJ

M20D

Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

74VHC373MTC

MTC20

20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide

74VHC373N

N20A

20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide