Nexperia

74HC21

Dual 4-input AND gate

001aab974

&

6

1

2

4

5

&

8

9

10

12

13

Fig. 3. IEC Logic symbol

001aab976

A

B

C

D

Y

Fig. 4. Logic diagram

5. Pinning information

5.1. Pinning

1A

VCC

1B

2D

n.c.

2C

1C

n.c.

1D

2B

1Y

2A

GND

2Y

aaa-036539

1

2

3

4

5

6

7

8

10

9

12

11

14

13

D package

SOT108-1 (SO14)

1A

VCC

1B

2D

n.c.

2C

1C

n.c.

1D

2B

1Y

2A

GND

2Y

aaa-036540

1

2

3

4

5

6

7

8

10

9

12

11

14

13

PW package

SOT402-1 (TSSOP14)

5.2. Pin description

Table 2. Pin description

Symbol

Pin

Description

1A, 1B, 1C, 1D

1, 2, 4, 5

data input

n.c.

3, 11

not connected

1Y

6

data output

GND

7

ground (0 V)

2Y

8

data output

2A, 2B, 2C, 2D

9, 10, 12, 13

data input

VCC

14

supply voltage

74HC21

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Product data sheet

Rev. 9 — 2 May 2023

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