Rev.4.00 Jul. 29, 2004 page 1 of 7

HD74LVC574A

Octal D-type Flip Flops with 3-state Outputs

REJ03D0361–0400Z

(Previous ADE-205-117B (Z))

Rev.4.00

Jul. 29, 2004

Description

The HD74LVC574A has eight edge trigger D type flip flops with three state outputs in a 20 pin package. Data at the D

inputs meeting set up requirements are transferred to the Q outputs on positive going transitions of the clock input.

When the clock input goes low, data at the D inputs will be retained at the outputs until clock input returns high again.

When a high logic level is applied to the output control 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. Low voltage and high-speed operation

is suitable at the battery drive product (note type personal computer) and low power consumption extends the life of a

battery for long time operation.

Features

• V

• All inputs V

• All outputs V

• Typical V

• Typical V

• High output current ±24 mA (@V

• Ordering Information

Part Name

Package Type

Package Code

Package

Abbreviation

Taping Abbreviation

(Quantity)

HD74LVC574AFPEL

SOP–20 pin (JEITA)

FP–20DAV

FP

EL (2,000 pcs/reel)

HD74LVC574ATELL

TSSOP–20 pin

TTP–20DAV

T

ELL (2,000 pcs/reel)

Note: Please consult the sales office for the above package availability.

Function Table

Inputs

OC

CK

D

Output Q

L

↑

HH

L

↑

LL

LL

X

HX

X

Z

H:

High level

L:

Low level

X:

Immaterial

Z:

High impedance

↑ :

Low to high transition

Level of Q before the indicated steady input conditions were established.