IN74HC251A datasheet(4/6 Pages) IKSEMICON

Part #	IN74HC251A

Description	8-Input Data Selector/Multiplexer with 3-State Outputs High-Performance Silicon-Gate CMOS

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IN74HC251A

AC ELECTRICAL CHARACTERISTICS (CL=50pF,Input tr=tf=6.0 ns)

VCC

Guaranteed Limit

Symbol

Parameter

V

25

°C

to

-55

°C

≤85°C

≤125°C

Unit

tPLH, tPHL

Maximum Propagation Delay, Input D to

Output Y or Y (Figures 1,2 and 5)

2.0

4.5

6.0

185

37

31

230

46

39

280

56

48

ns

tPLH, tPHL

Maximum Propagation Delay , Input A to

Output Y or Y (Figures 3 and 5)

2.0

4.5

6.0

205

41

35

255

51

43

310

62

53

ns

tPLZ, tPHZ

Maximum Propagation Delay , Output Enable to

Output Y (Figures 4 and 6)

2.0

4.5

6.0

195

39

33

245

48

42

295

59

50

ns

tPZL, tPZH

Maximum Propagation Delay , Output Enable to

Output Y (Figures 4 and 6)

2.0

4.5

6.0

145

29

25

180

36

31

220

44

38

ns

tPLZ, tPHZ

Maximum Propagation Delay , Output Enable to

Output Y (Figures 4 and 6)

2.0

4.5

6.0

220

44

37

275

55

47

330

66

56

ns

tPZL, tPZH

Maximum Propagation Delay , Output Enable to

Output Y (Figures 4 and 6)

2.0

4.5

6.0

150

30

26

190

38

33

225

45

38

ns

tTLH, tTHL

Maximum Output Transition Time, Any Output

(Figures 1 and 6)

2.0

4.5

6.0

75

15

13

95

19

16

110

22

19

ns

CIN

Maximum Input Capacitance

-

10

pF

COUT

Maximum Three-State Output Capacitance

(Output in High-Impedance State)

-

15

pF

Power Dissipation Capacitance (Per Package)

Typical @25

°C,V

CC=5.0 V

CPD

Used to determine the no-load dynamic power

consumption: PD=CPDVCC

2f+I

CCVCC

36

pF

Figure 1. Switching Waveforms

Figure 2. Switching Waveforms

Rev. 00

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IN74HC251A Datasheet(PDF) 4 Page - IK Semicon Co., Ltd

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