Diodes 74AHCT138 Uživatelský manuál stáhnout pdf (Strana 2)

74AHCT138

Document number: DS35483 Rev. 2 - 2

2 of 9

www.diodes.com

June 2013

© Diodes Incorporated

74AHCT138

Pin Descriptions

Pin Number Pin Name Description

1 A0 Address Input 0

2 A1 Address Input 1

3 A2 Address Input 2

4

E

1

Enable Input 1 (active LOW)

5

E

2

Enable Input 2 (active LOW)

6 E3 Enable Input 3 (active HIGH)

7 Y7 Output 7 (active LOW)

8 GND Ground

9 Y6 Output 6 (active LOW)

10 Y5 Output 5 (active LOW)

11 Y4 Output 4 (active LOW)

12 Y3 Output 3 (active LOW)

13 Y2 Output 2 (active LOW)

14 Y1 Output 1 (active LOW)

15 Y0 Output o (active LOW)

16

V

CC

Supply Voltage

Function Table Diagram

Control Input Output

E1 E2

E3 A2 A1 A0

Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0

H X X X X X H H H H H H H H

X H X

X X L

L L H

L L L H H H H H H H L

L L H H H H H H H L H

L H L H H H H H L H H

L H H H H H H L H H H

H L L H H H L H H H H

H L H H H L H H H H H

H H L H L H H H H H H

H H H L H H H H H H H

1 2 3 4 5 6 7 8 9

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