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54ACT573F Folha de dados(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Nome de Peças 54ACT573F
Descrição Electrónicos  Octal Latch with TRI-STATE Outputs
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Fabricante Electrônico  NSC [National Semiconductor (TI)]
Página de início  http://www.national.com
Logo NSC - National Semiconductor (TI)

54ACT573F Folha de dados(HTML) 3 Page - National Semiconductor (TI)

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Functional Description
The ’ACT573 contains eight D-type latches with TRI-STATE
output buffers. When the Latch Enable (LE) input is HIGH,
data on the D
n inputs enters the latches. In this condition the
latches are transparent, i.e., a latch output will change state
each time its D input changes. When LE is LOW the latches
store the information that was present on the D inputs a
setup time preceding the HIGH-to-LOW transition of LE. The
TRI-STATE buffers are controlled by the Output Enable (OE)
input. When OE is LOW, the buffers are enabled. When OE
is HIGH the buffers are in the high impedance mode but this
does not interfere with entering new data into the latches.
Truth Table
Inputs
Outputs
OE
LE
D
O
n
LH
H
H
LH
L
L
LL
X
O
0
HX
X
Z
H = HIGH Voltage
L = LOW Voltage
Z = High Impedance
X = Immaterial
O0 = Previous O0 before HIGH-to-LOW transition of Latch Enable
Logic Diagram
DS100332-5
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
3
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