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MC14XXXBCP 데이터시트(PDF) 1 Page - Motorola, Inc |
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MC14XXXBCP 데이터시트(HTML) 1 Page - Motorola, Inc |
1 / 7 page MOTOROLA CMOS LOGIC DATA 1 MC14544B BCD-to-Seven Segment Latch/Decoder/Driver for Liquid Crystals CMOS MSI (Low–Power Complementary MOS) The MC14544B 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. The Ripple Blanking Input (RBI) and the Ripple Blanking Output (RBO) can be used to suppress either leading or trailing zeroes. For other types of readouts, such as light–emitting diode (LED), incandescent, gas discharge, and fluorescent readouts, connection dia- grams 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 • Capability for Suppression of Non–significant zero • Capable of Driving Two Low–power TTL Loads, One Low–power Schottky TTL Load or Two HTL Loads Over the Rated Temperature Range MAXIMUM RATINGS* (Voltages referenced to VSS) Rating Symbol Value Unit DC Supply Voltage VDD – 0.5 to + 18 V Input Voltage, All Inputs Vin – 0.5 to VDD + 0.5 V DC Input Current per Pin Iin ± 10 mAdc Operating Temperature Range TA – 55 to + 125 _C Power Dissipation, per Package† PD 500 mW Storage Temperature Range Tstg – 65 to + 150 _C Maximum Continuous Output Drive Current (Source or Sink) per Output IOHmax IOLmax 10 mAdc Maximum Continuous Output Power* (Source or Sink) per Output POHmax POLmax 70 mW * POHmax = IOH (VOH – VDD) and POLmax = IOL (VOL – VSS) * Maximum Ratings are those values beyond which damage to the device may occur. †Temperature Derating: Plastic “P and D/DW” Packages: – 7.0 mW/ _C From 65_C To 125_C Ceramic “L” Packages: – 12 mW/ _C From 100_C To 125_C MOTOROLA SEMICONDUCTOR TECHNICAL DATA © Motorola, Inc. 1995 REV 3 1/94 MC14544B L SUFFIX CERAMIC CASE 726 ORDERING INFORMATION MC14XXXBCP Plastic MC14XXXBCL Ceramic TA = – 55° to 125°C for all packages. P SUFFIX PLASTIC CASE 707 PIN ASSIGNMENT A B C LD VSS RBO BI PH D e g f VDD RBI a b c d 14 15 16 17 18 10 11 12 13 5 4 3 2 1 9 8 7 6 This device contains protection circuitry to guard against damage due to high static voltages or electric fields. However, pre- cautions must be taken to avoid applications of any voltage higher than maximum rated volt- ages 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 outputs must be left open. 0 1 2 3 4 5 6 7 8 9 DISPLAY a b c d e f g |
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