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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 HEF4543B MSI BCD to 7-segment latch/decoder/driver Product specification File under Integrated Circuits, IC04 January 1995 Philips Semiconductors Product specification BCD to 7-segment latch/decoder/driver DESCRIPTION The HEF4543B is a BCD to 7-segment latch/decoder/driver for liquid crystal and LED displays. It has four address inputs (DA to DD), an active HIGH latch disable input (LD), an active HIGH blanking input (BI), an active HIGH phase input (PH) and seven buffered segment outputs (Oa to Og). HEF4543B MSI The circuit provides the function of a 4-bit storage latch and an 8-4-2-1 BCD to 7-segment decoder/driver. It can invert the logic levels of the output combination. The phase (PH), blanking (BI) and latch disable (LD) inputs are used to reverse the function table phase, blank the display and store a BCD code, respectively. For liquid crystal displays a square-wave is applied to PH and the electrical common back-plane of the display. The outputs of the device are directly connected to the segments of the liquid crystal. Fig.2 Pinning diagram. HEF4543BP(N): HEF4543BD(F): Fig.1 Functional diagram. HEF4543BT(D): 16-lead DIL; plastic (SOT38-1) 16-lead DIL; ceramic (cerdip) ( SOT74) 16-lead SO; plastic (SOT109-1) ( ): Package Designator North America PINNING DA to DD PH BI LD Oa to Og address (data) inputs phase input (active HIGH) blanking input (active HIGH) latch disable input (active HIGH) segment outputs Fig.3 Segment designation. FAMILY DATA, IDD LIMITS category MSI See Family Specifications 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 Fig.4 Logic diagram. Philips Semiconductors BCD to 7-segment latch/decoder/driver HEF4543B MSI Product specification Philips Semiconductors Product specification BCD to 7-segment latch/decoder/driver FUNCTION TABLE INPUTS LD X H H H H H H H H H H H H H H H H L BI H L L L L L L L L L L L L L L L L L PH L L L L L L L L L L L L L L L L L L H (4) HEF4543B MSI OUTPUTS DC X L L L L H H H H L L L L H H H H X DB X L L H H L L H H L L H H L L H H X DA X L H L H L H L H L H L H L H L H X Oa L H L H H L H H H H H L L L L L L Ob L H H H H H L L H H H L L L L L L Oc L H H L H H H H H H H L L L L L L Od L H L H H L H H L H H L L L L L L (5) DD X L L L L L L L L H H H H H H H H X Oe L H L H L L L H L H L L L L L L L Of L H L L L H H H L H H L L L L L L Og L L L H H H H H L H H L L L L L L DISPLAY blank 0 1 2 3 4 5 6 7 8 9 blank blank blank blank blank blank (5) as above Notes as above inverse of above as above 1. H = HIGH state (the more positive voltage) 2. L = LOW state (the less positive voltage) 3. X = state is immaterial 4. For liquid crystal displays, apply a square-wave to PH. For common cathode LED displays, select PH = LOW. For common anode LED displays, select PH = HIGH. 5. Depends upon the BCD-code previously applied when LD = HIGH. Fig.5 Display. January 1995 4 Philips Semiconductors Product specification BCD to 7-segment latch/decoder/driver AC CHARACTERISTICS VSS = 0 V; Tamb = 25 C; CL = 50 pF; input transition times 20 ns VDD V Propagation delays Dn On HIGH to LOW 5 10 15 5 LOW to HIGH LD On HIGH to LOW 10 15 5 10 15 5 LOW to HIGH BI On HIGH to LOW 10 15 5 10 15 5 LOW to HIGH Output transition times HIGH to LOW 10 15 5 10 15 5 LOW to HIGH Minimum LD pulse width; HIGH Set-up time Dn LD Hold time Dn LD 10 15 5 10 15 5 10 15 5 10 15 thold tsu tWLDH 60 30 20 40 20 15 0 15 20 tTLH tTHL tPLH tPHL tPLH tPHL tPLH tPHL 180 75 55 180 75 55 170 80 60 190 80 60 145 65 45 125 55 40 60 30 20 60 30 20 30 15 10 20 5 0 -15 0 5 360 150 110 360 150 110 340 160 120 380 160 120 290 130 90 250 110 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 SYMBOL MIN. TYP. MAX. HEF4543B MSI TYPICAL EXTRAPOLATION FORMULA 153 ns + (0,55 ns/pF) CL 64 ns + (0,23 ns/pF) CL 47 ns + (0,16 ns/pF) CL 153 ns + (0,55 ns/pF) CL 64 ns + (0,23 ns/pF) CL 47 ns + (0,16 ns/pF) CL 143 ns + (0,55 ns/pF) CL 69 ns + (0,23 ns/pF) CL 52 ns + (0,16 ns/pF) CL 163 ns + (0,55 ns/pF) CL 69 ns + (0,23 ns/pF) CL 52 ns + (0,16 ns/pF) CL 118 ns + (0,55 ns/pF) CL 54 ns + (0,23 ns/pF) CL 37 ns + (0,16 ns/pF) CL 98 ns + (0,55 ns/pF) CL 54 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 BCD to 7-segment latch/decoder/driver HEF4543B MSI VDD V Dynamic power dissipation per package (P) 5 10 15 TYPICAL FORMULA FOR P (W) 2 200 fi + (foCL) x VDD2 10 400 fi + (foCL) x 33 000 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) APPLICATION INFORMATION Some examples of applications for the HEF4543B are: * Driving LCD displays. * Driving LED displays. * Driving fluorescent displays. * Driving incandescent displays. * Driving gas discharge displays. Fig.6 Connection to common cathode LED display readout. January 1995 6 Philips Semiconductors Product specification BCD to 7-segment latch/decoder/driver HEF4543B MSI Fig.7 Connection to common anode LED display readout. Note to Figs 6 and 7: bipolar transistors may be added for gain where VDD 10 V or Iout 10 mA. Fig.8 Connection to liquid crystal (LCD) display readout. January 1995 7 Philips Semiconductors Product specification BCD to 7-segment latch/decoder/driver HEF4543B MSI Fig.9 Connection to incandescent display readout. Fig.10 Connection to gas discharge display readout. Fig.11 Connection to fluorescent display readout. January 1995 8 |
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