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74ACTQ823SPC Folha de dados(PDF) 2 Page - Fairchild Semiconductor

Nome de Peças 74ACTQ823SPC
Descrição Electrónicos  Quiet Seriesa??9-Bit D-Type Flip-Flop with 3-STATE Outputs
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Fabricante Electrônico  FAIRCHILD [Fairchild Semiconductor]
Página de início  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

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Functional Description
The ACTQ823 consists of nine D-type edge-triggered flip-
flops. These have 3-STATE outputs for bus systems orga-
nized with inputs and outputs on opposite sides. The buff-
ered 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 out-
puts. When OE is HIGH, the outputs go to the high imped-
ance state. Operation of the OE input does not affect the
state of the flip-flops. In addition to the Clock and Output
Enable pins, there are Clear (CLR) and Clock Enable (EN)
pins. These devices are ideal for parity bus interfacing in
high performance systems.
When CLR is LOW and OE is LOW, the outputs are LOW.
When CLR is HIGH, data can be entered into the flip-flops.
When EN is LOW, data on the inputs is transferred to the
outputs on the LOW-to-HIGH clock transition. When the
EN is HIGH, the outputs do not change state, regardless of
the data or clock input transitions.
Function Table
H
= HIGH Voltage Level
Z
= High Impedance
L
= LOW Voltage Level
 = LOW-to-HIGH Transition
X
= Immaterial
NC
= No Change
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
Output
Function
OE
CLR
EN
CP
D
Q
O
H
X
L

L
L
Z
High Z
H
X
L

H
H
Z
High Z
H
L
X
X
X
L
Z
Clear
L
L
X
X
X
L
L
Clear
H
H
H
X
X
NC
Z
Hold
L
H
H
X
X
NC
NC
Hold
H
H
L

L
L
Z
Load
H
H
L

H
H
Z
Load
L
H
L

L
L
L
Load
L
H
L

H
H
H
Load


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