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74VHCT573AN bảng dữ liệu(PDF) 2 Page - Fairchild Semiconductor

tên linh kiện 74VHCT573AN
Giải thích chi tiết về linh kiện  Octal D-Type Latch with 3-STATE Outputs
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Pin Descriptions
Truth Table
H
HIGH Voltage Level
L
LOW Voltage Level
X
Immaterial
Z
High Impedance
Functional Description
The VHCT573A contains eight D-type latches with 3-
STATE output buffers. When the Latch Enable (LE) input is
HIGH, data on the Dn inputs enters the latches. In this con-
dition 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 3-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.
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.
Pin Names
Description
D0–D7
Data Inputs
LE
Latch Enable Input
OE
3-STATE Output Enable Input
O0–O7
3-STATE Outputs
Inputs
Outputs
OE
LE
D
On
L
HHH
LH
L
L
LL
X
O0
HX
X
Z


Số phần tương tự - 74VHCT573AN

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