74HC4538(2008) View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

74HC4538
(Rev.:2008)

Dual retriggerable monostable multivibrator

STMicroelectronics 

M74HC4538

Electrical characteristics

Table 7.

AC electrical characteristics (CL = 50 pF, Input tr = tf = 6 ns) (continued)

Test condition

Value

Symbol

Parameter

VCC

(V)

TA = 25°C

-40 to 85°C

-55 to

125°C

Unit

Min Typ Max Min Max Min Max

2.0

380

4.5

Cx = 0.1 μF

Rx = 1KΩ

92

ns

trr

Minimum

retrigger time

6.0

2.0

72

6

4.5

Cx = 0.01μF

Rx = 1KΩ

1.4

μs

6.0

1.2

Table 8.

Capacitive characteristics

Test condition

Value

Symbol

Parameter

VCC

(V)

TA = 25°C

-40 to 85°C -55 to 125°C Unit

Min Typ Max Min Max Min Max

CIN Input capacitance 5.0

CPD

Power dissipation

capacitance (1)

5.0

5 10

10

10 pF

70

pF

1. CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current

consumption without load. (Refer to Test Circuit). Average operating current can be obtained by the following equation.

ICC(opr) = CPD x VCC x fIN + ICC’ Duty/100 + Ic/2(per monostable) (Icc’ : Active Supply current) (Duty : %)

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