MC74HC4538AFEL datasheet(6/16 Pages) ONSEMI

Part #	MC74HC4538AFEL

Description	Dual Precision Monostable Multivibrator (Retriggerable,Resettable)

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Manufacturer	ONSEMI [ON Semiconductor]

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MC74HC4538A

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OUTPUT PULSE WIDTH CHARACTERISTICS (CL = 50 pF)t

Symbol

Parameter

Conditions

Guaranteed Limits

Unit

Timing Components

VCC

V

–55 to 25

_C

v 85_C

v 125_C

Min

Max

Min

Max

Min

Max

τ

Output Pulse Width*

(Figures 6 and 8)

Rx = 10 kW, Cx = 0.1 mF

5.0

0.63

0.77

0.6

0.8

0.59

0.81

ms

−

Pulse Width Match Between

Circuits in the same Package

−

± 5.0

%

−

Pulse Width Match Variation

(Part to Part)

−

± 10

%

*For output pulse widths greater than 100

ms, typically τ = kRxCx, where the value of k may be found in Figure 3.

Figure 3. Typical Output Pulse Width Constant,

k, versus Supply Voltage

(For output pulse widths

> 100 ms: τ = kRxCx)

Figure 4. Output Pulse Width versus Timing Capacitance

Figure 5. Normalized Output Pulse Width versus Power Supply Voltage

0.8

0.7

0.6

0.5

0.4

0.3

10 s

1 s

100 ms

10 ms

1 ms

100

ms

10

ms

1

ms

100 ns

1.1

1

0.9

0.8

0.7

0.6

0.5

123

45

67

0.00001

0.0001

0.001

0.01

0.1

1

10

100

1

2

3456

7

VCC, POWER SUPPLY VOLTAGE (VOLTS)

CAPACITANCE (

mF)

VCC, POWER SUPPLY VOLTAGE (VOLTS)

TA = 25°C

VCC = 5 V, TA = 25°C

TA = 25°C

Rx = 100 kW

Cx = 1000 pF

Rx = 1 MW

Cx = 0.1 mF

1 k

W

10 k

W

1 M

W

100 k

W

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