74HCT181N datasheet(4/20 Pages) PHILIPS

Il numero della parte	74HCT181N

Spiegazioni elettronici	4-bit arithmetic logic unit

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Produttore elettronici	PHILIPS [NXP Semiconductors]

Homepage	http://www.nxp.com

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1998 Jun 10

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Philips Semiconductors

Product speciﬁcation

4-bit arithmetic logic unit

74HC/HCT181

PIN DESCRIPTION

PIN NO.

SYMBOL

NAME AND FUNCTION

1, 22, 20, 18

B0 to B3

operand inputs (active LOW)

2, 23, 21, 19

A0 to A3

operand inputs (active LOW)

6, 5, 4, 3

S0 to S3

select inputs

7Cn

carry input

8

M

mode control input

9, 10, 11, 13

F0 to F3

function outputs (active LOW)

12

GND

ground (0 V)

14

A=B

comparator output

15

P

carry propagate output (active LOW)

16

Cn+4

carry output

17

G

carry generate output (active LOW)

24

VCC

positive supply voltage

Fig.4 Functional diagram.

ok, halfpage

MBK219

A0

A1

A2

2

23

21

19

1

22

20

18

15

17

14

16

13

11

10

9

A3

B0

B1

Cn+4

F3

F2

F1

F0

A=B

G

B2

P

B3

7

Cn

6

S0

5

S1

4

S2

3

S3

8M

Fig.5 Active HIGH operands - active LOW operands.

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