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INTEGRATED CIRCUITS DATA SHEET 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 HEF4528B MSI Dual monostable multivibrator Product specification File under Integrated Circuits, IC04 January 1995 Philips Semiconductors Product specification Dual monostable multivibrator 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 (CTC(1), RCTC). An external timing capacitor (Ct ) must be connected between CTC and RCTC and an external resistor (Rt) must be connected between RCTC and VDD. The duration of the (1) Always connected to ground. HEF4528B MSI output pulse is determined by the external timing components Ct and Rt. A HIGH to LOW transition on I0 when I1 is LOW or a LOW to HIGH transition on I1 when I0 is HIGH produces a positive pulse (LOW-HIGH-LOW) and O and a negative pulse (HIGH-LOW-HIGH) on O if the CD is HIGH. A LOW Fig.2 Pinning diagram. HEF4528BP(N): HEF4528BD(F): HEF4528BT(D): 16-lead DIL; plastic (SOT38-1) 16-lead DIL; ceramic (cerdip) (SOT74) 16-lead SO; plastic (SOT109-1) ( ): Package Designator North America PINNING I0A, I0B I1A, I1B CDA, CDB OA, OB OA, OB CTC A, CTC B RCTC A, RCTC B input (HIGH to LOW triggered) input (LOW to HIGH triggered) clear direct input (active LOW) output complementary output (active LOW) external capacitor connections (1) external capacitor/ resistor connections Fig.1 Functional diagram. on CD forces O LOW, O HIGH and inhibits any further pulses until CD is HIGH. FAMILY DATA, IDD LIMITS category MSI See Family Specifications January 1995 2 Philips Semiconductors Product specification Dual monostable multivibrator HEF4528B MSI Fig.3 Logic diagram (one monostable multivibrator). January 1995 3 Philips Semiconductors Product specification Dual monostable multivibrator FUNCTION TABLE INPUTS I0 H X Notes 1. H = HIGH state (the more positive voltage) 2. L = LOW state (the less positive voltage) 3. X = state is immaterial 4. 5. 6. = positive-going transition = negative-going transition = positive or negative output pulse; width is determined by Ct and Rt X I1 L CD H H L L H OUTPUTS O O HEF4528B MSI AC CHARACTERISTICS VSS = 0 V; Tamb = 25 °C; CL = 50 pF; input transition times 20 ns VDD V Propagation delays I0, I1 O HIGH to LOW I0, I1 O LOW to HIGH CD O HIGH to LOW CD O LOW to HIGH Output transition times HIGH to LOW LOW to HIGH 5 10 15 5 10 15 5 10 15 5 10 15 5 10 15 5 10 15 tTLH tTHL tPLH tPHL tPLH tPHL 140 50 35 155 60 40 105 40 30 120 50 35 60 30 20 60 30 20 280 100 70 305 115 80 210 85 60 240 105 70 120 60 40 120 60 40 ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns 113 ns + (0,55 ns/pF) CL 39 ns + (0,23 n