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MC14534BDW Datasheet(PDF) 1 Page - Motorola, Inc |
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MC14534BDW Datasheet(HTML) 1 Page - Motorola, Inc |
1 / 9 page MOTOROLA CMOS LOGIC DATA 1 MC14534B 5 Cascaded BCD Counters The MC14534B is composed of five BCD ripple counters that have their respective outputs multiplexed using an internal scanner. Outputs of each counter are selected by the scanner and appear on four (BCD) pins. Selection is indicated by a logic high on the appropriate digit select pin. Both BCD and digit select outputs have three–state controls providing an “open–circuit” when these controls are high and allowing multiplexing. Cascading may be accomplished by using the carry–out pin. The counters and scanner can be independently reset by applying a high to the counter master reset (MR) and the scanner reset (SR). The MC14534B was specifically designed for application in real time or event counters where continual updating and multiplexed displays are used. • Four Operating Modes (See truth table) • Input Error Detection Circuit • Clock Conditioning Circuits for Slow Transition Inputs • Counter Sequences on Positive Transition of Clock A • Supply Voltage Range = 3.0 Vdc to 18 Vdc • Capable of Driving Two Low–power TTL Loads or One Low–power Schottky TTL Load Over the Rated Temperature Range BLOCK DIAGRAM PULSE ERROR DETECTOR PULSE SHAPER TEST CONTROL OUTPUT CONTROL MUX MUX MUX MUX MUX UNITS CARRY CONTROL TENS HUNDREDS THOUSANDS TEN THOUSANDS C ÷ 10 C ÷ 10 C ÷ 10 C ÷ 10 C ÷ 10 Q0 Q3 Q0 Q3 Q0 Q3 Q0 Q3 Q0 Q3 Cn+4 Cn+4 Cn+4 Cn+4 Cn+4 22 7 8 14 16 11 1 23 4 2 5 6 9 10 CLOCK B CLOCK A MASTER RESET MODE A MODE B SCANNER RESET SCANNER CLOCK ERROR OUT 3 R SCANNER 13 17 18 19 20 Q3 Q2 Q1 Q0 21 3–STATE BCD CONTROL CARRY OUT 3–STATE DIGIT CONTROL 15 DS1 DS2 DS3 DS4 DS5 DIGIT SELECT 3–STATE OUTPUT BUFFER NOTE: BCD OUT VDD = PIN 24 VSS = PIN 12 TO CAPACITORS 3–State Control Out Q or DS High Impedance 0 1 = MOTOROLA SEMICONDUCTOR TECHNICAL DATA © Motorola, Inc. 1995 REV 3 1/94 MC14534B L SUFFIX CERAMIC CASE 623 ORDERING INFORMATION MC14XXXBCP Plastic MC14XXXBCL Ceramic MC14XXXBDW SOIC TA = – 55° to 125°C for all packages. P SUFFIX PLASTIC CASE 709 DW SUFFIX SOIC CASE 751E |
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