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零件编号
产品描述 (功能)
74VHC139T 查看數據表(PDF) - STMicroelectronics
零件编号
产品描述 (功能)
生产厂家
74VHC139T
DUAL 2 TO 4 DECODER/DEMULTIPLEXER
STMicroelectronics
74VHC139T Datasheet PDF : 8 Pages
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74VHC139
INPUT EQUIVALENT CIRCUIT
TRUTH TABLE
E NA BL E
G
H
L
L
L
L
X:Don’t Care
IN PUT S
SELECT
B
A
X
X
L
L
L
H
H
L
H
H
LOGIC DIAGRAM
PIN DESCRIPTION
PIN No
1, 15
2, 3
4, 5, 6, 7
12, 11, 10,
9
14, 13
8
16
SYMBOL NAME AND FUNCT ION
1G, 2G Enable Inputs
1A, 1B Address Inputs
1Y0 to 1Y3 Outputs
2Y0 to 2Y3 Outputs
2A, 2B
GND
V
CC
Address Inputs
Ground (0V)
Positive Supply Voltage
OUTPUTS
Y0
Y1
Y2
Y3
H
H
H
H
L
H
H
H
H
L
H
H
H
H
L
H
H
H
H
L
Thislogic diagram has notbe used to estimate propagation delays
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