74ACTQ841 查看數據表（PDF） - Fairchild Semiconductor
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74ACTQ841 Datasheet PDF : 7 Pages
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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.
Logic Diagram
Function Table
Inputs
OE LE
D
X
X
X
H
H
L
H
H
H
H
L
X
L
H
L
L
H
H
L
L
X
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
NC = No Change
Internal Output
Q
O
X
Z
L
Z
H
Z
NC
Z
L
L
H
H
NC
NC
Function
High Z
High Z
High Z
Latched
Transparent
Transparent
Latched
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
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