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 HEF4532B MSI 8-input priority encoder 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. 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 HEF4532BP(N): 16-lead DIL; plastic (SOT38-1) HEF4532BD(F): 16-lead DIL; ceramic (cerdip) (SOT74) HEF4532BT(D): 16-lead SO; plastic (SOT109-1) ( ): Package Designator North America Fig.1 Functional diagram. PINNING I0 to I7 priority inputs Ein enable input Eout enable output GS group select output O0 to O2 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 ... Philips Semiconductors 8-input priority encoder January 1995 3 Product specification HEF4532B MSI Fig.3 Logic diagram. Philips Semiconductors Product specification HEF4532B MSI 8-input priority encoder TRUTH TABLE INPUTS OUTPUTS Ein I7 I6 I5 I4 I3 I2 I1 I0 GS O2 O1 O0 Eout L X X X X X X X X L L L L L H L L L L L L L L L L L L H H H X X X X X X X H H H H L H L H X X X X X X H H H L L H L L H X X X X X H H L H L H L L L H X X X X H H L L L H L L L L H X X X H L H H L H L L L L L H X X H L H L L H L L L L L L H X H L L H L H L L L L L L L H H 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 LOGIC EQUATIONS O2 = Ein ⋅ (I4 + I5 + I6 + I7) O1 = Ein ⋅ (I2 ⋅ I4 ⋅ I5 + I3 ⋅ I4 ⋅ I5 + I6 + I7) O0 = Ein ⋅ (I1 ⋅ I2 ⋅ I4 ⋅ I6 + I3 ⋅ I4 ⋅ I6 + I5 ⋅ I6 + I7) Eout = Ein ⋅ I0 ⋅ I1 ⋅ I2 ⋅ I3 ⋅ I4 ⋅ I5 ⋅ I6 ⋅ I7 GS = 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 5 TYPICAL FORMULA FOR P (µW) 1 620 fi + ∑ (foCL) × VDD2 where fi = input freq. (MHz) dissipation per 10 6 600 fi + ∑ (foCL) × package (P) 15 15 970 fi + ∑ (foCL) × VDD2 VDD2 fo = output freq. (MHz) CL = load capacitance (pF) ∑ (foCL) = sum of outputs VDD = supply voltage (V) January 1995 4 Philips Semiconductors Product specification HEF4532B MSI 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 TYPICAL EXTRAPOLATION FORMULA SYMBOL MIN. TYP. MAX. Propagation delays Ein → Eout HIGH to LOW 5 10 tPHL 15 5 LOW to HIGH 10 tPLH 15 Ein → GS HIGH to LOW 5 10 tPHL 15 5 LOW to HIGH 10 tPLH 15 Ein → On HIGH to LOW LOW to HIGH In → On HIGH to LOW LOW to HIGH In → GS HIGH to LOW LOW to HIGH Output transition times HIGH to LOW LOW to HIGH 190 ns 68 ns + (0,55 ns/pF) CL 90 ns 34 ns + (0,23 ns/pF) CL 35 70 ns 27 ns + (0,16 ns/pF) CL 80 160 ns 53 ns + (0,55 ns/pF) CL 35 70 ns 24 ns + (0,23 ns/pF) CL 30 60 ns 22 ns + (0,16 ns/pF) CL 85 170 ns 58 ns + (0,55 ns/pF) CL 45 90 ns 34 ns + (0,23 ns/pF) CL 35 70 ns 27 ns + (0,16 ns/pF) CL 80 160 ns 53 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 80 160 ns 53 ns + (0,55 ns/pF) CL 40 80 ns 29 ns + (0,23 ns/pF) CL 15 30 60 ns 22 ns + (0,16 ns/pF) CL 5 85 170 ns 58 ns + (0,55 ns/pF) CL 5 10 tPHL 40 80 ns 29 ns + (0,23 ns/pF) CL 15 30 60 ns 22 ns + (0,16 ns/pF) CL 5 115 230 ns 88 ns + (0,55 ns/pF) CL 10 tPLH 50 100 ns 39 ns + (0,23 ns/pF) CL 15 35 70 ns 27 ns + (0,16 ns/pF) CL 5 115 230 ns 88 ns + (0,55 ns/pF) CL 10 tPHL 50 100 ns 39 ns + (0,23 ns/pF) CL 15 35 70 ns 27 ns + (0,16 ns/pF) CL 5 115 230 ns 88 ns + (0,55 ns/pF) CL 10 tPLH 50 100 ns 39 ns + (0,23 ns/pF) CL 15 40 80 ns 32 ns + (0,16 ns/pF) CL 5 115 230 ns 88 ns + (0,55 ns/pF) CL 10 tPHL 50 100 ns 39 ns + (0,23 ns/pF) CL 15 40 80 ns 32 ns + (0,16 ns/pF) CL 5 60 120 ns 10 ns + (1,0 ns/pF) CL 30 60 ns 10 10 tPLH tTHL 9 ns + (0,42 ns/pF) CL 6 ns + (0,28 ns/pF) CL 15 20 40 ns 5 60 120 ns 30 60 ns 9 ns + (0,42 ns/pF) CL 20 40 ns 6 ns + (0,28 ns/pF) CL 10 15 January 1995 95 45 tTLH 5 10 ns + (1,0 ns/pF) CL Philips Semiconductors Product specification HEF4532B MSI 8-input priority encoder Fig.4 Waveforms showing propagation delays from inputs to outputs. January 1995 6 Philips Semiconductors Product specification HEF4532B MSI 8-input priority encoder APPLICATION INFORMATION Some examples of applications for the HEF4532B are: • Priority encoder • Keyboard encoder Fig.5 16-level priority encoder. January 1995 7 Philips Semiconductors Product specification HEF4532B MSI 8-input priority encoder Fig.6 0-to-9 keyboard encoder. TRUTH TABLE (for Fig.6) INPUTS 9 OUTPUTS 8 7 6 5 4 3 2 1 0 GS O’3 O’2 O’1 O’0 H X X X X X X X X X L H L L H L H X X X X X X X X L H L L L L L H X X X X X X X H L H H H L L L H X X X X X X H L H H L L L L L H X X X X X H L H L H L L L L L H X X X X H L H L L L L L L L L H X X X H L L H H L L L L L L L H X X H L L H L L L L L L L L L H X H L L L H L L L L L L L L L H H 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 January 1995 8