74LVX139(2004) 查看數據表（PDF） - STMicroelectronics

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74LVX139
(Rev.:2004)

LOW VOLTAGE CMOS DUAL 2 TO 4 DECODER/DEMULTIPLEXER

STMicroelectronics 

74LVX139

Figure 2: Input Equivalent Circuit

Table 3: Truth Table

INPUTS

ENABLE

SELECT

nG

nB

nA

H

X

X

L

L

L

L

L

H

L

H

L

L

H

H

X : Don’t Care

n: 1, 2.

Figure 3: Logic Diagram

Table 2: Pin Description

PIN N°

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

nY0

nY1

nY2

nY3

H

H

H

H

L

H

H

H

H

L

H

H

H

H

L

H

H

H

H

L

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