IN74HC21AD datasheet(4/5 Pages) INTEGRAL

Part #	IN74HC21AD

Description	Dual 4-Input AND Gate

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Manufacturer	INTEGRAL [Integral Corp.]

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IN74HC21A

4

INTEGRAL

AC ELECTRICAL CHARACTERISTICS (C

L=50pF,Input t r=tf=6.0 ns)

VCC

Guaranteed Limit

Symbol

Parameter

V

25

°C to

-55

°C

≤85°C

≤125°C

Unit

tPHL, tPLH

Maximum Propagation Delay (Figure 1)

2.0

4.5

6.0

110

22

19

140

28

24

165

33

28

ns

tTHL, tTLH

Maximum Output Transition Time

(Figure 1)

2.0

4.5

6.0

75

15

13

95

19

16

110

22

19

ns

CIN

Maximum Input Capacitance

5.0

10

pF

Power Dissipation Capacitance (Per Gate)

TA=25

°C,V

CC=5.0 V

CPD

Used to determine the no-load dynamic power

consumption:

PD=CPDVCC

2f+I

CCVCC

50

pF

Figure 1. Switching Waveforms

Figure 2. Test Circuit

0.1

0.9

V

2

V

2

V

1

t

PHL

t

HL

t

PLH

t

LH

GND

V

2

V

2

V = 0.5 V

1

CC

Input

Output

0.1

0.9

t

THL

t

TLH

0 V

V

CC

PULSE

GENERATOR

DEVICE

UNDER

TEST

V

CC

V

I

V

O

C

50 pF

L

R

T

Termination resistance RT – should

be equal to ZOUT of pulse

generators

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IN74HC21AD Datasheet(PDF) 4 Page - Integral Corp.

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