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74ACTQ841_00 Datasheet(PDF) 2 Page - Fairchild Semiconductor

Part No. 74ACTQ841_00
Description  Quiet Series 10-Bit Transparent Latch with 3-STATE Outputs
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Maker  FAIRCHILD [Fairchild Semiconductor]
Homepage  http://www.fairchildsemi.com
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Functional Description
The ACTQ841 consists of ten D-type latches with 3-STATE
outputs. The flip-flops appear transparent to the data when
Latch Enable (LE) is HIGH. This allows asynchronous
operation, as the output transition follows the data in transi-
tion.
On the LE HIGH-to-LOW transition, the data that meets the
setup and hold time is latched. Data appears on the bus
when the Output Enable (OE) is LOW. When OE is HIGH
the bus output is in the high impedance state.
Function Table
H
= HIGH Voltage Level
L
= LOW Voltage Level
X
= Immaterial
Z
= High Impedance
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
LE
D
Q
O
XX
X
X
Z
High Z
HH
L
L
Z
High Z
HH
H
H
Z
High Z
H
L
X
NC
Z
Latched
L
H
L
L
L
Transparent
L
H
H
H
H
Transparent
L
L
X
NC
NC
Latched




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