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1 / 8 page © Semiconductor Components Industries, LLC, 2000 March, 2000 – Rev. 3 1 Publication Order Number: MC14543B/D MC14543B BCD-to-Seven Segment Latch/Decoder/Driver for Liquid Crystals The MC14543B BCD–to–seven segment latch/decoder/driver is designed for use with liquid crystal readouts, and is constructed with complementary MOS (CMOS) enhancement mode devices. The circuit provides the functions of a 4–bit storage latch and an 8421 BCD–to–seven segment decoder and driver. The device has the capability to invert the logic levels of the output combination. The phase (Ph), blanking (BI), and latch disable (LD) inputs are used to reverse the truth table phase, blank the display, and store a BCD code, respectively. For liquid crystal (LC) readouts, a square wave is applied to the Ph input of the circuit and the electrically common backplane of the display. The outputs of the circuit are connected directly to the segments of the LC readout. For other types of readouts, such as light–emitting diode (LED), incandescent, gas discharge, and fluorescent readouts, connection diagrams are given on this data sheet. Applications include instrument (e.g., counter, DVM etc.) display driver, computer/calculator display driver, cockpit display driver, and various clock, watch, and timer uses. • Latch Storage of Code • Blanking Input • Readout Blanking on All Illegal Input Combinations • Direct LED (Common Anode or Cathode) Driving Capability • Supply Voltage Range = 3.0 V to 18 V • Capable of Driving 2 Low–power TTL Loads, 1 Low–power Schottky TTL Load or 2 HTL Loads Over the Rated Temperature Range • Pin–for–Pin Replacement for CD4056A (with Pin 7 Tied to V SS). • Chip Complexity: 207 FETs or 52 Equivalent Gates MAXIMUM RATINGS (Voltages Referenced to VSS) (Note 2.) Symbol Parameter Value Unit VDD DC Supply Voltage Range – 0.5 to +18.0 V Vin Input Voltage Range, All Inputs – 0.5 to VDD + 0.5 V Iin DC Input Current per Pin ±10 mA PD Power Dissipation, per Package (Note 3.) 500 mW TA Operating Temperature Range – 55 to +125 °C Tstg Storage Temperature Range – 65 to +150 °C IOHmax IOLmax Maximum Continuous Output Drive Current (Source or Sink) 10 (per Output) mA POHmax POLmax Maximum Continuous Output Power (Source or Sink) (4.) 70 (per Output) mW 2. Maximum Ratings are those values beyond which damage to the device may occur. 3. Temperature Derating: Plastic “P and D/DW” Packages: – 7.0 mW/ _C From 65_C To 125_C 4. POHmax = IOH (VOH – VDD) and POLmax = IOL (VOL – VSS) http://onsemi.com A = Assembly Location WL or L = Wafer Lot YY or Y = Year WW or W = Work Week Device Package Shipping ORDERING INFORMATION MC14543BCP PDIP–16 2000/Box MC14543BD SOIC–16 48/Rail MC14543BDR2 SOIC–16 2500/Tape & Reel 1. For ordering information on the EIAJ version of the SOIC packages, please contact your local ON Semiconductor representative. MARKING DIAGRAMS 1 16 PDIP–16 P SUFFIX CASE 648 MC14543BCP AWLYYWW SOIC–16 D SUFFIX CASE 751B 1 16 14543B AWLYWW SOEIAJ–16 F SUFFIX CASE 966 1 16 MC14543B AWLYWW MC14543BFEL SOEIAJ–16 See Note 1. MC14543BF SOEIAJ–16 See Note 1. This device contains protection circuitry to guard against damage due to high static voltages or electric fields. However, precautions must be taken to avoid ap- plications of any voltage higher than maximum rated voltages to this high–impedance circuit. For proper operation, Vin and Vout should be constrained to the range VSS v (Vin or Vout) v VDD. Unused inputs must always be tied to an appropriate logic voltage level (e.g., either VSS or VDD). Unused out- puts must be left open. |
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