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 2 / 15