Rev.2.00, Oct 06, 2005 page 1 of 6

HD74HC77

4-bit Bistable Latch

REJ03D0552-0200

(Previous ADE-205-424)

Rev.2.00

Oct 06, 2005

Description

The HD74HC77 is ideally suited for use as temporary storage for binary information between processing units and

input/output or indicator units. Information present at a data (D) input is transferred to the Q output when the enable

(G) is high and the Q output will follow the data input as long as the enable remains high. When the enable goes low

the information (that was present at the data input at the time the transition occurred) is retained at the Q output until the

enable is permitted to go high.

Features

• High Speed Operation: t

• High Output Current: Fanout of 10 LSTTL Loads

• Wide Operating Voltage: V

• Low Input Current: 1 µA max

• Low Quiescent Supply Current: I

• Ordering Information

Part Name

Package Type

Package Code

(Previous Code)

Package

Abbreviation

Taping Abbreviation

(Quantity)

HD74HC77P

DILP-14 pin

PRDP0014AB-B

(DP-14AV)

P

—

HD74HC77FPEL

SOP-14 pin (JEITA)

PRSP0014DF-B

(FP-14DAV)

FP

EL (2,000 pcs/reel)

HD74HC77RPEL

SOP-14 pin (JEDEC)

PRSP0014DE-A

(FP-14DNV)

RP

EL (2,500 pcs/reel)

Note:

Please consult the sales office for the above package availability.

Function Table

Inputs

Output

Data

Enable G

Q

L

H

L

H

H

H

X

L

No change

H :

High level

L :

Low level

X :

Irrelevant