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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 HEF4028B MSI 1-of-10 decoder Product specification File under Integrated Circuits, IC04 January 1995 Philips Semiconductors Product specification 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. HEF4028B MSI Fig.1 Functional diagram. HEF4028BP(N): HEF4028BD(F): HEF4028BT(D): 16-lead DIL; plastic (SOT38-1) 16-lead DIL; ceramic (cerdip) (SOT74) 16-lead SO; plastic (SOT109-1) ( ): Package Designator North America PINNING Fig.2 Pinning diagram. A0 to A3 O0 to O9 address inputs, 1-2-4-8 BCD outputs (active HIGH) FAMILY DATA, IDD LIMITS category MSI See Family Specifications January 1995 2 Philips Semiconductors Product specification 1-of-10 decoder HEF4028B MSI Fig.3 Logic diagram. January 1995 3 Philips Semiconductors Product specification 1-of-10 decoder TRUTH TABLE INPUTS A3 L L L L L L L L H H H H H H H H Notes 1. H = HIGH state (the more positive voltage) L = LOW state (the less positive voltage) 2. Extraordinary states. A2 L L L L H H H H L L L L H H H H A1 L L H H L L H H L L H H L L H H A0 L H L H L H L H L H L H L H L H O0 H L L L L L L L L L L L L L L L O1 L H L L L L L L L L L L L L L L O2 L L H L L L L L L L L L L L L L O3 L L L H L L L L L L L L L L L L O4 L L L L H L L L L L L L L L L L OUTPUTS O5 L L L L L H L L L L L L L L L L O6 L L L L L L H L L L L L L L L L O7 L L L L L L L H L L L L L L L L O8 L L L L L L L L H L L L L L L L HEF4028B MSI O9 L L L L L L L L L H L L L L L L (2) January 1995 4 Philips Semiconductors Product specification 1-of-10 decoder AC CHARACTERISTICS VSS = 0 V; Tamb = 25 C; CL = 50 pF; input transition times 20 ns VDD V Propagation delays An On HIGH to LOW 5 10 15 5 LOW to HIGH Output transition times HIGH to LOW 10 15 5 10 15 5 LOW to HIGH 10 15 tTLH tTHL tPLH tPHL 100 40 30 90 40 30 60 30 20 60 30 20 200 80 60 180 80 60 120 60 40 120 60 40 ns ns ns ns ns ns ns ns ns ns ns ns 73 ns 29 ns 22 ns 63 ns 29 ns 22 ns 10 ns 9 ns 6 ns 10 ns 9 ns 6 ns + + + + + + + + + + + + SYMBOL TYP. MAX. HEF4028B MSI TYPICAL EXTRAPOLATION FORMULA (0,55 ns/pF) CL (0,23 ns/pF) CL (0,16 ns/pF) CL (0,55 ns/pF) CL (0,23 ns/pF) CL (0,16 ns/pF) CL (1,0 ns/pF) CL (0,42 ns/pF) CL (0,28 ns/pF) CL (1,0 ns/pF) CL (0,42 ns/pF) CL (0,28 ns/pF) CL VDD V Dynamic power dissipation per package (P) 5 10 15 TYPICAL FORMULA FOR P (W) 350 fi + (foCL) x VDD 2 2 200 fi + (foCL) x VDD 7 350 fi + (foCL) x VDD 2 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 This datasheet has been download from: www..com Datasheets for electronics components. |
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