January 1995

2

Philips Semiconductors

Product specification

Dual monostable multivibrator

HEF4528B

MSI

DESCRIPTION

The HEF4528B is a dual retriggerable-resettable

monostable multivibrator. Each multivibrator has an active

(O), and two pins for connecting the external timing

(1) Always connected to ground.

output pulse is determined by the external timing

positive pulse (LOW-HIGH-LOW) and O and a negative

Fig.1 Functional diagram.

PINNING

See Family Specifications

HEF4528BP(N):

16-lead DIL; plastic (SOT38-1)

HEF4528BD(F):

16-lead DIL; ceramic (cerdip) (SOT74)

HEF4528BT(D):

16-lead SO; plastic (SOT109-1)

( ): Package Designator North America

input (HIGH to LOW triggered)

input (LOW to HIGH triggered)

clear direct input (active LOW)

output

complementary output (active LOW)

external capacitor/ resistor connections

Fig.2 Pinning diagram.