74VHC139 查看數據表（PDF） - STMicroelectronics
零件编号
产品描述 (功能)
生产厂家
74VHC139 Datasheet PDF : 9 Pages
| |||
74VHC139
INPUT EQUIVALENT CIRCUIT
TRUTH TABLE
ENABLE
G
H
L
L
L
L
X : Don’t care
INPUTS
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 FUNCTION
1G, 2G
1A, 1B
1Y0 to 1Y3
2Y0 to 2Y3
2A, 2B
GND
VCC
Enable Inputs
Address Inputs
Outputs
Outputs
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
This logic diagram has not be used to estimate propagation delays
2/9
Share Link: 