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54ACT821L View Datasheet(PDF) - National ->Texas Instruments

Part NameDescriptionManufacturer
54ACT821L 10-Bit D Flip-Flop with TRI-STATE Outputs National-Semiconductor
National ->Texas Instruments National-Semiconductor
54ACT821L Datasheet PDF : 8 Pages
1 2 3 4 5 6 7 8
Functional Description
The ’AC/’ACT821 consists of ten D-type edge-triggered
flip-flops. The buffered Clock (CP) and buffered Output En-
able (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 im-
pedance state. Operation of the OE input does not affect the
state of the flip-flops.
The ’AC/’ACT821 is functionally and pin compatible with the
AM29821.
Function Table
Inputs
OE
CP
D
H
N
L
H
N
H
L
N
L
L
N
H
H = HIGH Voltage Level
L = LOW Voltage Level
Z = HIGH Impedance
N = LOW-to-HIGH Clock Transition
Internal
Q
L
H
L
H
Outputs
O
Z
Z
L
H
Function
High Z
High Z
Load
Load
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.
DS100355-5
www.national.com
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