74HC21 datasheet(3/14 Pages) NXP

3 / 14 page

74HC21_5

Product data sheet

Rev. 05 — 7 May 2009

3 of 14

NXP Semiconductors

74HC21

Dual 4-input AND gate

5.2 Pin description

Functional description

[1]

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

Limiting values

[1]

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

[2]

For DIP14 package: Ptot derates linearly with 12 mW/K above 70 °C.

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

Description

1A, 1B, 1C, 1D

1, 2, 4, 5

data input

n.c.

3, 11

not connected

data output

GND

ground (0 V)

data output

2A, 2B, 2C, 2D

9, 10, 12, 13

data input

VCC

supply voltage

Table 3.

Function table[1]

Input

Output

XXXL

XXL

XXXL

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

IIK

input clamping current

VI < −0.5 V or VI >VCC + 0.5 V

[1] -

±20

IOK

output clamping current

VO < −0.5 V or VO >VCC + 0.5 V

[1] -

±20

output current

−0.5 V < VO < VCC + 0.5 V

±25

ICC

supply current

IGND

ground current

−50

Tstg

storage temperature

−65

+150

°C

Ptot

total power dissipation

[2]

DIP14 package

750

SO14 and (T)SSOP14

packages

500

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