Philips HEF4528BU, HEF4528BT, HEF4528BPB, HEF4528BP, HEF4528BDB Datasheet
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DATA SH EET
Product specification
File under Integrated Circuits, IC04
January 1995
INTEGRATED CIRCUITS
HEF4528B
MSI
Dual monostable multivibrator
For a complete data sheet, please also download:
•The IC04 LOCMOS HE4000B Logic
Family Specifications HEF, HEC
•The IC04 LOCMOS HE4000B Logic
Package Outlines/Information HEF, HEC
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
LOW input (I0), and active HIGH input (I1), an active LOW
clear direct input (CD), an output (O) and its complement
(O), and two pins for connecting the external timing
components (C
TC
(1)
, RCTC).
An external timing capacitor (Ct) must be connected
between CTCand RCTCand an external resistor (Rt) must
be connected between RCTCand VDD. The duration of the
(1) Always connected to ground.
output pulse is determined by the external timing
components Ct and Rt.
A HIGH to LOW transition on I0 when I1is LOW or a LOW
to HIGH transition on I1when I0is HIGH produces a
positive pulse (LOW-HIGH-LOW) and O and a negative
pulse (HIGH-LOW-HIGH) on O if the CDis HIGH. A LOW
on CDforces O LOW, O HIGH and inhibits any further
pulses until CDis HIGH.
Fig.1 Functional diagram.
PINNING
FAMILY DATA, I
DD
LIMITS category MSI
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
I
0A,I0B
input (HIGH to LOW triggered)
I
1A
, I
1B
input (LOW to HIGH triggered)
CDA, C
DB
clear direct input (active LOW)
O
A
, O
B
output
OA, O
B
complementary output (active LOW)
C
TC A
, C
TC B
external capacitor connections
(1)
RC
TC A
,
external capacitor/ resistor connections
RC
TC B
Fig.2 Pinning diagram.
January 1995 3
Philips Semiconductors Product specification
Dual monostable multivibrator
HEF4528B
MSI
Fig.3 Logic diagram (one monostable multivibrator).
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