TECHNICAL DATA

KK74HC27A

Triple 3-Input NOR Gate

ORDERING INFORMATION

KK74HC27AN

Plastic

KK74HC27AD

SOIC

The KK74HC27A is high-speed Si-gate CMOS device and are pin

compatible with low power Schottky TTL (LSTTL) . The device provide

Triple 3-input NOR function.

• Outputs Directly Interface to CMOS, NMOS, and TTL

• Operating Voltage Range: 2.0 to 6.0 V

• Low Input Current: 1.0 µA

• High Noise Immunity Characteristic of CMOS Devices

LOGIC DIAGRAM

PIN 7 = GND

PIN ASSIGNMENT

A1

A2

A3

C1

C2

C3

Y1

Y2

Y3

B1

B2

B3

1

2

3

5

4

6

7

V CC

14

13

12

11

10

8

9

GND

A1

B1

B2

B3

A2

A3

Y2

Y3

Y1

C1

C2

C3

FUNCTION TABLE

Inputs

Output

A

B

C

C

B

A

Y

+

+

=

L

L

L

H

X

X

H

L

X

H

X

L

H

X

X

L

X = don’t care

1