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74ACTQ821SPC Datasheet(PDF) 2 Page - Fairchild Semiconductor

Part No. 74ACTQ821SPC
Description  Quiet Series 10-Bit D-Type Flip-Flop with 3-STATE Outputs
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Maker  FAIRCHILD [Fairchild Semiconductor]
Homepage  http://www.fairchildsemi.com
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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




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