Connection Diagrams

Functional Description

The ’AC/’ACT574 consists of eight edge-triggered flip-flops

with individual D-type inputs and TRI-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 require-

ments 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. Operation of the OE input

does not affect the state of the flip-flops.

Function Table

Inputs

Internal

Outputs

Function

OE

CP

D

Q

O

N

H

H

L

NC

Z

Hold

H

H

H

NC

Z

Hold

H

N

L

L

Z

Load

H

N

H

H

Z

Load

L

N

L

L

L

Data Available

L

N

H

H

H

Data Available

L

H

L

NC

NC

No Change in Data

L

H

H

NC

NC

No Change in Data

H = HIGH Voltage Level

L = LOW Voltage Level

X = Immaterial

Z = High Impedance

N = LOW-to-HIGH Transition

NC = No Change

Pin Assignment for DIP,

and Flatpak

DS100256-2

Pin Assignment

for LCC

DS100256-3

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