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 HEF4028B MSI 1-of-10 decoder Product specification File under Integrated Circuits, IC04 January 1995 Philips Semiconductors Product specification HEF4028B MSI 1-of-10 decoder DESCRIPTION The HEF4028B is a 4-bit BCD to 1-of-10 active HIGH decoder. A 1-2-4-8 BCD code applied to inputs A0 to A3 causes the selected output to be HIGH, the other nine will be LOW. If desired, the device may be used as a 1-of-8 decoder with enable; 3-bit octal inputs are applied to inputs A0, A1 and A2 selecting an output O0 to O7. Input A3 then becomes an active LOW enable, forcing the selected output LOW when A3 is HIGH. The HEF4028B may also be used as an 8-output (O0 to O7) demultiplexer with A0 to A2 as address inputs and A3 as an active LOW data input. The outputs are fully buffered for best performance. Fig.1 Functional diagram. HEF4028BP(N): 16-lead DIL; plastic (SOT38-1) HEF4028BD(F): 16-lead DIL; ceramic (cerdip) HEF4028BT(D): 16-lead SO; plastic (SOT74) (SOT109-1) ( ): Package Designator North America PINNING Fig.2 Pinning diagram. A0 to A3 address inputs, 1-2-4-8 BCD O0 to O9 outputs (active HIGH) FAMILY DATA, IDD LIMITS category MSI See Family Specifications January 1995 2 Philips Semiconductors Product specification HEF4028B MSI 1-of-10 decoder Fig.3 Logic diagram. January 1995 3 Philips Semiconductors Product specification HEF4028B MSI 1-of-10 decoder TRUTH TABLE INPUTS OUTPUTS A3 A2 A1 A0 O0 O1 O2 O3 O4 O5 O6 O7 O8 O9 L L L L H L L L L L L L L L L L L H L H L L L L L L L L L L H L L L H L L L L L L L L L H H L L L H L L L L L L L H L L L L L L H L L L L L L H L H L L L L L H L L L L L H H L L L L L L L H L L L L H H H L L L L L L L H L L H L L L L L L L L L L L H L H L L H L L L L L L L L L H H L H L L L L L L L L L L L H L H H L L L L L L L L L L H H L L L L L L L L L L L L H H L H L L L L L L L L L L H H H L L L L L L L L L L L H H H H L L L L L L L L L L Notes 1. H = HIGH state (the more positive voltage) L = LOW state (the less positive voltage) 2. Extraordinary states. January 1995 4 (2) Philips Semiconductors Product specification HEF4028B MSI 1-of-10 decoder AC CHARACTERISTICS VSS = 0 V; Tamb = 25 C; CL = 50 pF; input transition times 20 ns VDD V SYMBOL TYPICAL EXTRAPOLATION FORMULA TYP. MAX. 100 200 ns 73 ns + (0,55 ns/pF) CL 40 80 ns 29 ns + (0,23 ns/pF) CL 30 60 ns 22 ns + (0,16 ns/pF) CL 90 180 ns 63 ns + (0,55 ns/pF) CL 40 80 ns 29 ns + (0,23 ns/pF) CL 30 60 ns 22 ns + (0,16 ns/pF) CL 60 120 ns 10 ns + (1,0 ns/pF) CL 30 60 ns 9 ns + (0,42 ns/pF) CL 20 40 ns 6 ns + (0,28 ns/pF) CL Propagation delays An On HIGH to LOW 5 10 tPHL 15 5 LOW to HIGH 10 tPLH 15 Output transition times HIGH to LOW 5 10 tTHL 15 5 LOW to HIGH 10 15 VDD V Dynamic power dissipation per package (P) 5 tTLH 60 120 ns 10 ns + (1,0 ns/pF) CL 30 60 ns 9 ns + (0,42 ns/pF) CL 20 40 ns 6 ns + (0,28 ns/pF) CL TYPICAL FORMULA FOR P (W) 350 fi + (foCL) x VDD 2 10 2 200 fi + (foCL) x VDD 2 15 7 350 fi + (foCL) x VDD 2 where fi = input freq. (MHz) fo = output freq. (MHz) CL = total load cap. (pF) (foCL) = sum of outputs VDD = supply voltage (V) January 1995 5