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54AC574 Datasheet(PDF) 2 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. 54AC574
Description  Octal D-Type Flip-Flop with TRI-STATE Outputs
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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54AC574 Datasheet(HTML) 2 Page - National Semiconductor (TI)

 
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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
www.national.com
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