74HC21

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© NXP Semiconductors N.V. 2015. All rights reserved.

Product data sheet

Rev. 7 — 30 November 2015

3 of 14

NXP Semiconductors

74HC21

Dual 4-input AND gate

5.2 Pin description

6.

Functional description

[1]

H = HIGH voltage level; L = LOW voltage level; X = don’t care.

7.

Limiting values

[1]

The input and output voltage ratings may be exceeded if the input and output current ratings are observed.

[2]

For SO14 package: Ptot derates linearly with 8 mW/K above 70 C.

For (T)SSOP14 packages: Ptot derates linearly with 5.5 mW/K above 60 C.

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

Table 3.

Function table[1]

Input

Output

nA

nB

nC

nD

nY

L

XXXL

XL

XXL

XXL

XL

XXXL

L

HHHHH

Table 4.

Limiting values

In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).

Symbol

Parameter

Conditions

Min

Max

Unit

VCC

supply voltage

0.5

+7

V

IIK

input clamping current

VI < 0.5 V or VI >VCC +0.5 V

[1]

-

20

mA

IOK

output clamping current

VO < 0.5 V or VO >VCC +0.5 V

[1]

-

20

mA

IO

output current

0.5 V < V

O < VCC +0.5 V

-

25

mA

ICC

supply current

-

50

mA

IGND

ground current

50

-

mA

Tstg

storage temperature

65

+150

C

Ptot

total power dissipation

SO14 and (T)SSOP14 packages

[2]

-500

mW

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