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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 HEF4532B MSI 8-input priority encoder Product specification File under Integrated Circuits, IC04 January 1995 Philips Semiconductors Product specification 8-input priority encoder DESCRIPTION The HEF4532B is an 8-input priority encoder with eight active HIGH priority inputs (I0 to I7), three active HIGH outputs (O0 to O2), an active HIGH enable input (Ein), an active HIGH enable output (Eout) and an active HIGH group select output (GS). Data is accepted on inputs I0 to I7. The binary code HEF4532B MSI corresponding to the highest priority input (I0 to I7) which is HIGH, is generated on O0 to O2 if Ein is HIGH. Input I7 is assigned the highest priority. GS is HIGH when one or more priority inputs and Ein are HIGH. Eout is HIGH when I0 to I7 are LOW and Ein is HIGH. Ein, when LOW, forces all outputs (O0 to O2, GS, Eout) LOW. HEF4532BP(N): HEF4532BD(F): HEF4532BT(D): 16-lead DIL; plastic (SOT38-1) 16-lead DIL; ceramic (cerdip) (SOT74) 16-lead SO; plastic (SOT109-1) ( ): Package Designator North America Fig.1 Functional diagram. PINNING I0 to I7 Ein Eout GS O0 to O2 priority inputs enable input enable output group select output outputs FAMILY DATA, IDD LIMITS category MSI See Family Specifications Fig.2 Pinning diagram. January 1995 2 This text is here in white to force landscape pages to be rotated correctly when browsing through the pdf in the Acrobat reader.This text is here in _white to force landscape pages to be rotated correctly when browsing through the pdf in the Acrobat reader.This text is here inThis text is here in white to force landscape pages to be rotated correctly when browsing through the pdf in the Acrobat reader. white to force landscape pages to be ... January 1995 3 Product specification Fig.3 Logic diagram. Philips Semiconductors 8-input priority encoder HEF4532B MSI Philips Semiconductors Product specification 8-input priority encoder TRUTH TABLE INPUTS Ein L H H H H H H H H H Notes 1. H = HIGH state (the more positive voltage) 2. L = LOW state (the less positive voltage) 3. X = state is immaterial LOGIC EQUATIONS O2 O1 O0 GS = Ein (I4 + I5 + I6 + I7) = Ein (I2 I4 I5 + I3 I4 I5 + I6 + I7) = Ein (I1 I2 I4 I6 + I3 I4 I6 + I5 I6 + I7) = Ein (I0 + I1 + I2 + I3 + I4 + I5 + I6 + I7) I7 X L H L L L L L L L I6 X L X H L L L L L L I5 X L X X H L L L L L I4 X L X X X H L L L L I3 X L X X X X H L L L I2 X L X X X X X H L L I1 X L X X X X X X H L I0 X L X X X X X X X H GS L L H H H H H H H H O2 L L H H H H L L L L HEF4532B MSI OUTPUTS O1 L L H H L L H H L L O0 L L H L H L H L H L Eout L H L L L L L L L L Eout = Ein I0 I1 I2 I3 I4 I5 I6 I7 AC CHARACTERISTICS VSS = 0 V; Tamb = 25 C; input transition times 20 ns VDD V Dynamic power dissipation per package (P) 5 10 15 TYPICAL FORMULA FOR P (W) 1 620 fi + (foCL) x VDD2 6 600 fi + (foCL) x 15 970 fi + (foCL) x VDD2 VDD2 where fi = input freq. (MHz) fo = output freq. (MHz) CL = load capacitance (pF) (foCL) = sum of outputs VDD = supply voltage (V) January 1995 4 Philips Semiconductors Product specification 8-input priority encoder AC CHARACTERISTICS VSS = 0 V; Tamb = 25 C; CL = 50 pF; input transition times 20 ns; see also waveforms Fig.4 VDD V Propagation delays Ein Eout HIGH to LOW 5 10 15 5 LOW to HIGH Ein GS HIGH to LOW 10 15 5 10 15 5 LOW to HIGH Ein On HIGH to LOW 10 15 5 10 15 5 LOW to HIGH In On HIGH to LOW 10 15 5 10 15 5 LOW to HIGH In GS HIGH to LOW 10 15 5 10 15 5 LOW to HIGH Output transition times HIGH to LOW LOW to HIGH 10 15 5 10 15 5 10 15 tTLH tTHL tPLH tPHL tPLH tPHL tPLH tPHL tPLH tPHL tPLH tPHL 95 45 35 80 35 30 85 45 35 80 40 30 80 40 30 85 40 30 115 50 35 115 50 35 115 50 40 115 50 40 60 30 20 60 30 20 190 90 70 160 70 60 170 90 70 160 80 60 160 80 60 170 80 60 230 100 70 230 100 70 230 100 80 230 100 80 120 60 40 120 60 40 ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns ns SYMBOL MIN. TYP. MAX. HEF4532B MSI TYPICAL EXTRAPOLATION FORMULA 68 ns + (0,55 ns/pF) CL 34 ns + (0,23 ns/pF) CL 27 ns + (0,16 ns/pF) CL 53 ns + (0,55 ns/pF) CL 24 ns + (0,23 ns/pF) CL 22 ns + (0,16 ns/pF) CL 58 ns + (0,55 ns/pF) CL 34 ns + (0,23 ns/pF) CL 27 ns + (0,16 ns/pF) CL 53 ns + (0,55 ns/pF) CL 29 ns + (0,23 ns/pF) CL 22 ns + (0,16 ns/pF) CL 53 ns + (0,55 ns/pF) CL 29 ns + (0,23 ns/pF) CL 22 ns + (0,16 ns/pF) CL 58 ns + (0,55 ns/pF) CL 29 ns + (0,23 ns/pF) CL 22 ns + (0,16 ns/pF) CL 88 ns + (0,55 ns/pF) CL 39 ns + (0,23 ns/pF) CL 27 ns + (0,16 ns/pF) CL 88 ns + (0,55 ns/pF) CL 39 ns + (0,23 ns/pF) CL 27 ns + (0,16 ns/pF) CL 88 ns + (0,55 ns/pF) CL 39 ns + (0,23 ns/pF) CL 32 ns + (0,16 ns/pF) CL 88 ns + (0,55 ns/pF) CL 39 ns + (0,23 ns/pF) CL 32 ns + (0,16 ns/pF) CL 10 ns + (1,0 ns/pF) CL 9 ns + (0,42 ns/pF) CL 6 ns + (0,28 ns/pF) CL 10 ns + (1,0 ns/pF) CL 9 ns + (0,42 ns/pF) CL 6 ns + (0,28 ns/pF) CL January 1995 5 Philips Semiconductors Product specification 8-input priority encoder HEF4532B MSI Fig.4 Waveforms showing propagation delays from inputs to outputs. January 1995 6 Philips Semiconductors Product specification 8-input priority encoder APPLICATION INFORMATION Some examples of applications for the HEF4532B are: * Priority encoder * Keyboard encoder HEF4532B MSI Fig.5 16-level priority encoder. January 1995 7 Philips Semiconductors Product specification 8-input priority encoder HEF4532B MSI Fig.6 0-to-9 keyboard encoder. TRUTH TABLE (for Fig.6) INPUTS 9 H L L L L L L L L L Notes 1. H = HIGH state (the more positive voltage) 2. L = LOW state (the less positive voltage) 3. X = state is immaterial 8 X H L L L L L L L L 7 X X H L L L L L L L 6 X X X H L L L L L L 5 X X X X H L L L L L 4 X X X X X H L L L L 3 X X X X X X H L L L 2 X X X X X X X H L L 1 X X X X X X X X H L 0 X X X X X X X X X H GS L L H H H H H H H H O'3 H H L L L L L L L L OUTPUTS O'2 L L H H H H L L L L O'1 L L H H L L H H L L O'0 H L H L H L H L H L January 1995 8 |
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