CD74HC423 查看數據表（PDF） - Harris Semiconductor

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CD74HC423

High Speed CMOS Logic Dual Retriggerable Monostable Multivibrators with Resets

Harris Semiconductor 

CD74HC123, CD74HCT123, CD74HC423, CD74HCT423

Switching Specifications CL = 50pF, Input tr, tf = 6ns, RX = 10KΩ, CX = 0

PARAMETER

HC TYPES

Trigger Propagation Delay

A, B, R to Q

TEST

25oC

SYMBOL CONDITIONS VCC (V) MIN TYP MAX

tPHL

CL = 50pF

2

-

- 300

-40oC TO

85oC

MIN MAX

-

375

4.5

-

-

60

-

75

A, B, R to Q

tPHL

CL = 15pF

5

CL = 50pF

6

CL = 50pF

2

4.5

-

25

-

-

-

-

-

51

-

64

-

-

320

-

400

-

-

64

-

80

Reset Propagation Delay

R to Q or Q

CL = 15pF

5

CL = 50pF

6

tPHL, tPLH CL = 50pF

2

4.5

-

26

-

-

-

-

-

54

-

68

-

-

215

-

270

-

-

43

-

54

6

-

-

37

-

46

Output Transition Time

tTHL, tTLH CL = 50pF

2

-

-

75

-

95

4.5

-

-

15

-

19

6

-

-

13

-

16

-55oC TO

125oC

MIN MAX UNITS

-

450 ns

-

90

ns

-

-

ns

-

76

ns

-

480 ns

-

96

ns

-

-

ns

-

82

ns

-

325 ns

-

65

ns

-

55

ns

-

110 ns

-

22

ns

-

19

ns

Output Pulse Width

-

RX = 10KΩ, CX = 10pF

-

5

-

45

-

-

-

-

-

µs

Pulse Width Match Between

Circuits In the Same Package

-

RX = 10KΩ, CX = 10pF

-

5

-

±2

-

-

-

-

-

%

Power Dissipation Capacitance CPD

CL = 15pF

5

-

-

-

-

-

-

-

pF

Input Capacitance

CIN

CL = 50pF

-

10

-

10

-

10

-

10

pF

NOTES:

5. CPD is used to determine the dynamic power consumption, per multivibrator.

6. PD = (CPD + CX) VCC2 fi ∑(CL VCC2 fO) where fi = input frequency, fO = Output Frequency, CL = Output Load Capacitance,

CX = External Capacitance VCC = Supply Voltage assuming fi « t--W-I---

6

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