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
EXT
) must be connected between nCEXT and
nREXT/CEXT and an external resistor (R
EXT
) must be connected between nREXT/CEXT
and V
DD
. The output pulse duration is determined by the external timing components
C
EXT
and R
EXT
. A HIGH-to-LOW transition on nA when nB is LOW or a LOW-to-HIGH
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
DD
power supply range of 3 V to 15 V referenced to
V
SS
(usually ground). Unused inputs must be connected to V
DD
, V
SS
, or another input.
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.
PackageType number
Name Description Version
HEF4528BT SO16 plastic small outline package; 16 leads; body width 3.9 mm SOT109-1
