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Functional Description

The ACTQ821 consists of ten-bit D-type edge-triggered

flip-flops. The buffered Clock (CP) and buffered Output

Enable (OE) are common to all flip-flops. The flip-flops will

store the state of their individual D inputs that meet the

setup and hold time requirements on the LOW-to-HIGH CP

transition. With OE LOW the contents of the 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.

The ACTQ821 is functionally and pin compatible with the

AM29821.

Function Table

H

= HIGH Voltage Level

L

= LOW Voltage Level

Z

= HIGH Impedance

 = LOW-to-HIGH Clock Transition

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.

Inputs

Internal

Outputs

Function

OE

CP

D

Q

O

H



L

L

Z

High Z

H



H

H

Z

High Z

L



LL

L

Load

L



HH

H

Load