74HC21

Dual 4-input AND gate

Rev. 9 — 2 May 2023

Product data sheet

1. General description

The 74HC21 is a dual 4-input AND gate. Inputs include clamp diodes. This enables the use of

current limiting resistors to interface inputs to voltages in excess of VCC.

2. Features and benefits

• Wide supply voltage range from 2.0 to 6.0 V

• CMOS low power dissipation

• High noise immunity

• Latch-up performance exceeds 100 mA per JESD 78 Class II Level B

• CMOS input levels

• Complies with JEDEC standards:

• JESD8C (2.7 V to 3.6 V)

• JESD7A (2.0 V to 6.0 V)

• ESD protection:

• HBM JESD22-A114E exceeds 2000 V

• MM JESD22-A115-A exceeds 200 V

• Specified from -40 °C to +85 °C and from -40 °C to +125 °C.

3. Ordering information

Table 1. Ordering information

Package

Type number

Temperature range Name

Description

Version

74HC21D

-40 °C to +125 °C

SO14

plastic small outline package; 14 leads;

body width 3.9 mm

SOT108-1

74HC21PW

-40 °C to +125 °C

TSSOP14 plastic thin shrink small outline package; 14 leads;

body width 4.4 mm

SOT402-1

4. Functional diagram

001aab975

1A

1B

1C

1D

1

2

4

6

1Y

5

2A

2B

2C

2D

9

10

12

8

2Y

13

Fig. 1. Functional diagram

001aab973

1A

1B

1C

1D

1

2

4

6

1Y

5

2A

2B

2C

2D

9

10

12

8

2Y

13

Fig. 2. Logic symbol