74ACT534 データシートの表示（PDF） - Fairchild Semiconductor

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74ACT534

Octal D-Type Flip-Flop with 3-STATE Outputs

Fairchild Semiconductor 

Functional Description

The ACT534 consists of eight edge-triggered flip-flops with

individual D-type inputs and 3-STATE complementary out-

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

Function Table

transition. With the Output Enable (OE) LOW, the contents

of the eight flip-flops are available at the outputs. When the

OE is HIGH, the outputs go to the high impedance state.

Operation of the OE input does not affect the state of the

flip-flops.

Inputs

CP

OE

D



L

H



L

L

L

L

X

X

H

X

H = HIGH Voltage Level

L = LOW Voltage Level

X = Immaterial

= LOW-to-HIGH Clock Transition

Z = High Impedance

O0 = Value stored from previous clock cycle

Logic Diagram

Output

O

L

H

O0

Z

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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