Rev.2.00 Mar 30, 2006 page 1 of 8

HD74HC374, HD74HC534

Octal D-type Flip-Flops (with 3-state outputs)

Octal D-type Flip-Flops (with inverted 3-state outputs)

REJ03D0620-0200

(Previous ADE-205-499)

Rev.2.00

Mar 30, 2006

Description

These devices are positive edge triggered flip-flops. The difference between HD74HC374 and HD74HC534 is only

that the former is a true outputs and the latter is a false outputs. Data at the D inputs, meeting the setup and hold time

requirements, are transferred to the Q outputs on positive going transitions of the clock (CK) input. When a high logic

level is applied to the output control (OC) input, all outputs go to a high impedance state, regardless of what signals are

present at the other inputs and the state of the storage elements.

Features

• High Speed Operation: t

• High Output Current: Fanout of 15 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)

HD74HC374P

HD74HC534P

DILP-20 pin

PRDP0020AC-B

(DP-20NEV)

P

—

HD74HC374FPEL

HD74HC534FPEL

SOP-20 pin (JEITA)

PRSP0020DD-B

(FP-20DAV)

FP

EL (2,000 pcs/reel)

HD74HC534RPEL

SOP-20 pin (JEDEC)

PRSP0020DC-A

(FP-20DBV)

RP

EL (1,000 pcs/reel)

HD74HC374TELL

TSSOP-20 pin

PTSP0020JB-A

(TTP-20DAV)

T

ELL (2,000 pcs/reel)

Note:

Please consult the sales office for the above package availability.

Function Table

Output Control

Clock

D

HD74HC374

Q

HD74HC534

Q

L

H

H

L

L

L

L

H

L

L

X

No change

No change

H

X

X

Z

Z

Note:

1. H; High level, L; Low level, X; Irrelevant, Z; High impedance