HEF4528B Dual monostable multivibrator Rev. 7 22 November 2011 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 V DD SS (usually ground). Unused inputs must be connected to V , V , or another input. 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 HEF4528BP DIP16 plastic dual in-line package 16 leads (300 mil) SOT38-4 HEF4528BT SO16 plastic small outline package 16 leads body width 3.9 mm SOT109-1HEF4528B NXP Semiconductors Dual monostable multivibrator 4. Functional diagram nCEXT nREXT/ 2 1REXT/CEXT CEXT 1 1CEXT nA 1Q 6 5 1A nB 4 1B 1Q 7 3 1CD 2REXT/CEXT 14 2CEXT 15 2Q 10 11 2A nCD 12 2B 2Q 9 13 2CD nQ 001aae727 nQ 001aae729 Fig 1. Functional diagram Fig 2. Logic diagram for one monostable multivibrator HEF4528B All information provided in this document is subject to legal disclaimers. NXP B.V. 2011. All rights reserved. Product data sheet Rev. 7 22 November 2011 2 of 17