HD74HC51

Rev.2.00, Oct 06, 2005 page 2 of 6

2Y =

(2A·2B) + (2C·2D)

Inputs

Output

2A

2B

2C

2D

2Y

H

H

X

X

L

X

X

H

H

L

L

X

L

X

H

L

X

X

L

H

X

L

L

X

H

X

L

X

L

H

H :

High level

L :

Low level

X :

Irrelevant

Pin Arrangement

1

2

3

4

5

6

7

1A

2A

2B

2C

2D

2Y

GND

1C

1B

1F

1E

1D

1Y

14

13

12

11

10

9

8

(Top view)

Absolute Maximum Ratings

Item

Symbol

Ratings

Unit

Supply voltage range

–0.5 to 7.0

V

Input / Output voltage

Vin, Vout

V

Input / Output diode current

±20

mA

Output current

±25

mA

±50

mA

Power dissipation

500

mW

Storage temperature

Tstg

–65 to +150

°C

Note:

The absolute maximum ratings are values, which must not individually be exceeded, and furthermore, no two of

which may be realized at the same time.