SNx4HC21 Dual 4-Input AND Gates

1 Features

• Buffered inputs

• Wide operating voltage range: 2 V to 6 V

• Wide operating temperature range: -40°C to +85°C

• Supports fanout up to 10 LSTTL loads

• Significant power reduction compared to LSTTL

logic ICs

2 Applications

• Combining power good signals

• Enable digital signals

3 Description

This device contains two independent 4-input AND

gates. Each gate performs the Boolean function

Y = A ● B ● C ● D in positive logic.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

SN74HC21D

SOIC (14)

8.70 mm × 3.90 mm

SN74HC21N

PDIP (14)

19.30 mm × 6.40 mm

SN74HC21NS

SO (14)

10.20 mm × 5.30 mm

SN74HC21PW

TSSOP (14)

5.00 mm × 4.40 mm

SN54HC21J

CDIP (14)

21.30 mm × 7.60 mm

SN54HC21FK

LCCC (20)

8.90 mm × 8.90 mm

(1)

For all available packages, see the orderable addendum at

the end of the data sheet.

1

2

3

7

4

5

6

14

13

12

8

11

10

9

1A

1B

NC

1C

1D

1Y

GND

2D

2C

NC

2B

2A

2Y

V

CC

Functional pinout

SN74HC21, SN54HC21

SCLS087F – DECEMBER 1982 – REVISED JUNE 2021

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.