CD74HCT423 查看數據表（PDF） - Harris Semiconductor

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CD74HCT423

High Speed CMOS Logic Dual Retriggerable Monostable Multivibrators with Resets

Harris Semiconductor 

CD74HC123, CD74HCT123, CD74HC423, CD74HCT423

Prerequisite for Switching Specifications (Continued)

25oC

PARAMETER

R

SYMBOL VCC (V) MIN

tWL

2

100

4.5

20

TYP

-

-

MAX

-

-

6

17

-

-

A and B Hold Time

tH

2

50

-

-

4.5

10

-

-

6

9

-

-

Reset Removal Time

tREM

2

50

-

-

4.5

10

-

-

6

9

-

-

Retrigger Time Number

trT

RX = 10KΩ, CX = 0

5

-

-

-

-

50

-

-40oC TO 85oC

MIN TYP MAX

125

-

-

25

-

-

21

-

-

65

-

-

13

-

-

11

-

-

65

-

-

13

-

-

11

-

-

-

-

-

-

63

-

-55oC TO 125oC

MIN TYP MAX UNITS

150

-

150 ns

30

-

30

ns

26

-

26

ns

75

-

75

ns

15

-

15

ns

13

-

13

ns

75

-

75

ns

15

-

15

ns

13

-

13

ns

-

-

-

ns

-

76

-

ns

Output Pulse Width

Q or Q

tW

5

RX = 10KΩ, CX = 10nF

HCT TYPES

Minimum Input,

Pulse Width

tWL

A

40

-

50 38.7

-

51.3 38.2

-

51.8 µs

5

20

-

-

25

-

-

-

30

-

-

ns

B

tWH

20

-

-

25

-

-

30

-

-

ns

R

tWL

20

-

-

25

-

-

30

-

-

ns

A and B Hold Time

tH

5

10

-

-

13

-

-

15

-

-

ns

Reset Removal Time

tREM

5

10

-

-

13

-

-

15

-

ns

Retrigger Time Number

(Note 4)

RX = 10KΩ, CX = 0

trT

5

-

50

-

-

63

-

-

76

-

ns

Output Pulse Width Q or Q

tW

5

40

-

50 38.7

-

51.3 38.2

-

51.8 µs

RX = 10KΩ, CX = 10nF

NOTE:

4. Time to trigger depends on the values of RX and CX. The output pulse width can only be extended when the time between the active-

going edges of the trigger input pulses meet the minimum retrigger time requirement.

5

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