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 HEF4543B MSI BCD to 7-segment latch/decoder/driver 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. 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). 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. Fig.1 Functional diagram. HEF4543BP(N): 16-lead DIL; plastic (SOT38-1) HEF4543BD(F): 16-lead DIL; ceramic (cerdip) ( SOT74) HEF4543BT(D): 16-lead SO; plastic (SOT109-1) ( ): Package Designator North America PINNING DA to DD address (data) inputs PH phase input (active HIGH) BI blanking input (active HIGH) LD latch disable input (active HIGH) Oa to Og 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 ... Philips Semiconductors 3 BCD to 7-segment latch/decoder/driver January 1995 Product specification HEF4543B MSI Fig.4 Logic diagram. Philips Semiconductors Product specification HEF4543B MSI BCD to 7-segment latch/decoder/driver FUNCTION TABLE INPUTS LD BI PH X H H L (4) OUTPUTS DD DC DB DA Oa Ob Oc Od Oe Of Og DISPLAY L X X X X L L L L L L L blank L L L L L H H H H H H L 0 H L L L L L H L H H L L L L 1 H L L L L H L H H L H H L H 2 H L L L L H H H H H H L L H 3 H L L L H L L L H H L L H H 4 H L L L H L H H L H H L H H 5 H L L L H H L H L H H H H H 6 H L L L H H H H H H L L L L 7 H L L H L L L H H H H H H H 8 H L L H L L H H H H H L H H 9 H L L H L H L L L L L L L L blank H L L H L H H L L L L L L L blank H L L H H L L L L L L L L L blank H L L H H L H L L L L L L L blank H L L H H H L L L L L L L L blank H L L H H H H L L L L L L L blank L L L as above H X X X X as above Notes 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 (5) (5) inverse of above as above Philips Semiconductors Product specification HEF4543B MSI 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 SYMBOL MIN. TYP. TYPICAL EXTRAPOLATION FORMULA MAX. Propagation delays Dn → On HIGH to LOW 180 360 ns 153 ns + (0,55 ns/pF) CL 75 150 ns 64 ns + (0,23 ns/pF) CL 55 110 ns 47 ns + (0,16 ns/pF) CL 180 360 ns 153 ns + (0,55 ns/pF) CL 75 150 ns 64 ns + (0,23 ns/pF) CL 55 110 ns 47 ns + (0,16 ns/pF) CL 170 340 ns 143 ns + (0,55 ns/pF) CL 80 160 ns 69 ns + (0,23 ns/pF) CL 60 120 ns 52 ns + (0,16 ns/pF) CL 190 380 ns 163 ns + (0,55 ns/pF) CL 80 160 ns 69 ns + (0,23 ns/pF) CL 60 120 ns 52 ns + (0,16 ns/pF) CL 145 290 ns 118 ns + (0,55 ns/pF) CL 65 130 ns 54 ns + (0,23 ns/pF) CL 15 45 90 ns 37 ns + (0,16 ns/pF) CL 5 125 250 ns 98 ns + (0,55 ns/pF) CL 5 10 tPHL 15 5 LOW to HIGH 10 tPLH 15 LD → On HIGH to LOW 5 10 tPHL 15 5 LOW to HIGH 10 tPLH 15 BI → On HIGH to LOW LOW to HIGH Output transition times HIGH to LOW LOW to HIGH 5 10 tPHL 55 110 ns 54 ns + (0,23 ns/pF) CL 15 40 80 ns 32 ns + (0,16 ns/pF) CL 5 60 120 ns 10 ns + 10 tPLH 30 60 ns 9 ns + (0,42 ns/pF) CL 15 20 40 ns 6 ns + (0,28 ns/pF) CL 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 10 tTHL tTLH 15 Minimum LD pulse width; HIGH 5 10 tWLDH 60 30 ns 30 15 ns 15 20 10 ns Set-up time 5 40 20 ns Dn → LD 10 Hold time Dn → LD 20 5 ns 15 15 0 ns 5 0 −15 ns 15 0 ns 20 5 ns 10 15 January 1995 (1,0 ns/pF) CL tsu thold 5 10 ns + (1,0 ns/pF) CL Philips Semiconductors Product specification HEF4543B MSI BCD to 7-segment latch/decoder/driver VDD V Dynamic power 5 TYPICAL FORMULA FOR P (µW) 2 200 fi + ∑ (foCL) × VDD2 dissipation per 10 10 400 fi + ∑ (foCL) × package (P) 15 33 000 fi + ∑ (foCL) × 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 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 HEF4543B MSI Philips Semiconductors Product specification BCD to 7-segment latch/decoder/driver 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 HEF4543B MSI