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74LVT573MTC 数据表(PDF) 2 Page - Fairchild Semiconductor

部件名 74LVT573MTC
功能描述  Low Voltage Octal Transparent Latch with 3-STATE Outputs
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制造商  FAIRCHILD [Fairchild Semiconductor]
网页  http://www.fairchildsemi.com
标志 FAIRCHILD - Fairchild Semiconductor

74LVT573MTC 数据表(HTML) 2 Page - Fairchild Semiconductor

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Logic Symbols
IEEE/IEC
Connection Diagram
Pin Descriptions
Truth Table
H
HIGH Voltage Level
L
LOW Voltage Level
Z
High Impedance
X
Immaterial
O0
Previous O0 before HIGH to LOW transition of Latch Enable
Functional Description
The LVT573 and LVTH573 contain eight D-type latches with 3-STATE standard outputs. When the Latch Enable (LE) input
is HIGH, data on the Dn inputs enters the latches. In this condition the latches are transparent, i.e., a latch output will
change state each time its D-type input changes. When LE is LOW, the latches store the information that was present on
the D-type inputs a setup time preceding the HIGH-to-LOW transition of LE. The 3-STATE standard outputs are controlled
by the Output Enable (OE) input. When OE is LOW, the standard outputs are in the 2-state mode. When OE is HIGH, the
standard outputs 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
Output Enable Input
O0–O7
3-STATE Latch Outputs
Inputs
Outputs
LE
OE
Dn
On
XH
X
Z
HL
L
L
HL
H
H
LL
X
O0


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