74LCX574(1999) データシートの表示（PDF） - Fairchild Semiconductor

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74LCX574
(Rev.:1999)

Low Voltage Octal D-Type Flip-Flop with 5V Tolerant Inputs and Outputs

Fairchild Semiconductor 

Functional Description

The LCX574 consists of eight edge-triggered flip-flops with

individual D-type inputs and 3-STATE true outputs. The

buffered clock and buffered Output Enable are common to

all flip-flops. The eight flip-flops will store the state of their

individual D inputs that meet the setup and hold time

requirements on the LOW-to-HIGH Clock (CP) transition.

With the Output Enable (OE) LOW, the contents of the

eight flip-flops are available at the outputs. When OE is

HIGH, the outputs go to the high impedance state. Opera-

tion of the OE input does not affect the state of the flip-

flops.

Truth Table

Inputs

OE CP D

H HL

H HH

 H

L

 H

H

 L

L

 L

H

L HL

L HH

Internal

Q

NC

NC

L

H

L

H

NC

NC

Outputs

Function

On

Z Hold

Z Hold

Z Load

Z Load

L Data Available

H Data Available

NC No Change in Data

NC No Change in Data

H = HIGH Voltage Level

L = LOW Voltage Level

X = Immaterial

Z = High Impedance

= LOW-to-HIGH Transition

NC = No Change

Logic Diagram

Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.

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