74HC4538 datasheet(6/13 Pages) PHILIPS

Part #	74HC4538

Description	Dual retriggerable precision monostable multivibrator

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Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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6 / 13 page

September 1993

6

Philips Semiconductors

Product speciﬁcation

Dual retriggerable precision monostable

multivibrator

74HC/HCT4538

DC CHARACTERISTICS FOR 74HC

For the DC characteristics see

“74HC/HCT/HCU/HCMOS Logic Family Specifications”.

Output capability: standard

ICC category: MSI

AC CHARACTERISTICS FOR 74HC

GND = 0 V; tr = tf = 6 ns; CL = 50 pF

SYMBOL

PARAMETER

Tamb (°C)

UNIT

TEST CONDITIONS

74HC

VCC

(V)

OTHER

+25

−40 to +85

−40 to +125

min.

typ.

max.

min.

max.

min.

max.

tPLH

propagation delay

nA0,nA1 to nQ

85

31

25

265

53

45

330

66

56

400

80

68

ns

2.0

4.5

6.0

Fig.8

tPHL

propagation delay

nA0,nA1 to nQ

83

30

24

265

53

45

330

66

56

400

80

68

ns

2.0

4.5

6.0

Fig.8

tPHL

propagation delay

nRD to nQ

80

29

23

265

53

45

330

66

56

400

80

68

ns

2.0

4.5

6.0

Fig.8

tPLH

propagation delay

nRD to nQ

83

30

24

265

53

45

340

68

58

400

80

68

ns

2.0

4.5

6.0

Fig.8

tTHL/ tTLH

output transition

time

19

7

6

75

15

13

95

19

16

110

22

19

ns

2.0

4.5

6.0

Fig.8

tW

nA0 pulse width

LOW

80

16

14

17

6

5

100

20

17

120

24

20

ns

2.0

4.5

6.0

Fig.8

tW

nA1 pulse width

HIGH

80

16

14

17

6

5

100

20

17

120

24

20

ns

2.0

4.5

6.0

Fig.8

tW

nRD pulse width

LOW

80

16

14

19

7

6

100

20

17

120

24

20

ns

2.0

4.5

6.0

Fig.8

tW

nQ, nQ pulse width

HIGH or LOW

0.63 0.70

0.77

0.602 0.798

0.595 0.805

ms

5.0

Fig.8;

Rt = 10 kΩ;

Ct = 0.1 µF

trem

removal time

RD to nA0,nA1

35

7

6

2

45

9

8

55

11

9

ns

2.0

4.5

6.0

Fig.8

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