HEF4528B
Dual monostable multivibrator
Rev. 10 14 March 2017 Product data sheet
1 General description
The HEF4528B is a dual retriggerable-resetable monostable multivibrator. Each
multivibrator has an active LOW input (nA), and active HIGH input (nB), an active LOW
clear direct input (nCD), an output (nQ) and its complement (nQ), and two external timing
component connecting pins (nCEXT, always connected to ground, and nREXT/CEXT).
An external timing capacitor (C ) must be connected between nCEXT and
EXT
nREXT/CEXT and an external resistor (R ) must be connected between nREXT/CEXT
EXT
and V . The output pulse duration is determined by the external timing components
DD
C and R . A HIGH-to-LOW transition on nA when nB is LOW or a LOW-to-HIGH
EXT EXT
transition on nB when nA is HIGH produces a positive pulse (LOW-HIGH-LOW) on nQ
and a negative pulse (HIGH-LOW-HIGH) on nQ if the nCD is HIGH. A LOW on nCD
forces nQ LOW, nQ HIGH and inhibits any further pulses until nCD is HIGH.
It operates over a recommended V power supply range of 3 V to 15 V referenced to
DD
V (usually ground). Unused inputs must be connected to V , V , or another input.
SS DD SS
2 Features and benefits
Fully static operation
5 V, 10 V, and 15 V parametric ratings
Standardized symmetrical output characteristics
Specified from -40 C to +85 C
Complies with JEDEC standard JESD 13-B
3 Ordering information
Table 1. Ordering information
All types operate from -40 C to +85 C.
Type number Package
Name Description Version
HEF4528BT SO16 plastic small outline package; 16 leads; body width 3.9 mm SOT109-1Nexperia
HEF4528B
Dual monostable multivibrator
4 Functional diagram
nCEXT
nREXT/
CEXT
2 1REXT/CEXT
nA
1 1CEXT
nB
1Q 6
5 1A
4 1B
1Q 7
3 1CD
2REXT/CEXT
14
2CEXT
15
nCD
2Q 10
11 2A
12 2B
nQ
2Q 9
13 2CD
nQ
001aae729
001aae727
Figure 2. Logic diagram for one monostable
Figure 1. Functional diagram multivibrator
5 Pinning information
5.1 Pinning
HEF4528B
1CEXT 1 16 V
DD
2 15
1REXT/CEXT 2CEXT
1CD 3 14 2REXT/CEXT
1B 4 13 2CD
1A 5 12 2B
1Q 6 11 2A
7 10
1Q 2Q
V 8 9 2Q
SS
001aae728
Figure 3. Pin configuration (SO16)
HEF4528B All information provided in this document is subject to legal disclaimers. Nexperia B.V. 2017. All rights reserved.
Product data sheet Rev. 10 14 March 2017
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