HEF4538BP View Datasheet(PDF) - Philips Electronics

Part Name

Description

MFG CO.

HEF4538BP

Dual precision monostable multivibrator

Philips Electronics 

Philips Semiconductors

Dual precision monostable multivibrator

FUNCTION TABLE

INPUTS

I0

I1

CD

L

H

H

H

X

X

L

OUTPUTS

O

O

L

H

Notes

1. H = HIGH state (the more positive voltage)

L = LOW state (the less positive voltage)

X = state is immaterial

= positive output pulse

= negative output pulse

= positive-going transition

= negative-going transition

Product specification

HEF4538B

MSI

Fig.4 Connection of the external timing

components Rt and Ct.

DC CHARACTERISTICS

VSS = 0 V

Tamb (°C)

VDD

V

SYMBOL

− 40

+ 25

+ 85

TYP. MAX. TYP. MAX. TYP. MAX.

Supply current

active state

(see note)

Input leakage

current

(pins 2 and 14)

5

10

ID

15

15

± IIN

55

150

220

300

µA

µA

µA

1000 nA

Note

1. Only one monostable is switching: current present during output pulse (output O is HIGH).

January 1995

4

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