MC14534B Datasheet | Motorola Semiconductor

.. MOTOROLA SEMICONDUCTOR TECHNICAL DATA MC14534B 5 Cascaded BCD Counters The MC14534B is posed 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 acplished 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 L SUFFIX CERAMIC CASE 623 P SUFFIX PLASTIC CASE 709 DW SUFFIX SOIC CASE 751E ORDERING INFORMATION MC14XXXBCP MC14XXXBCL MC14XXXBDW Plastic Ceramic SOIC TA = - 55° to 125°C for all packages. BLOCK DIAGRAM TO CAPACITORS 22 23 CLOCK B CLOCK A 4 MASTER 2 RESET C ÷ 10 Q0 5 MODE A MODE B 6 MUX 18 Q2 BCD OUT Q1 R SCANNER 10 CLOCK 20 SCANNER Q0 OUTPUT CONTROL MUX MUX MUX MUX 17 Q3 PULSE SHAPER PULSE ERROR DETECTOR 3 ERROR OUT TEST CONTROL 1 VDD = PIN 24 VSS = PIN 12 UNITS Cn+4 Q3 CARRY CONTROL C ÷ 10 Q0 TENS Cn+4 Q3 HUNDREDS C ÷ 10 Q0 Cn+4 Q3 THOUSANDS C ÷ 10 Q0 Cn+4 Q3 TEN THOUSANDS C ÷ 10 Cn+4 Q0 Q3 13 CARRY OUT SCANNER RESET 9 21 15 3- STATE DIGIT CONTROL 3- STATE BCD CONTROL 7 NOTE: = 3- STATE OUTPUT BUFFER DS1 8 DS2 14 DS3 16 DS4 11 DS5 3- State Control 0 1 Out Q or DS High Impedance DIGIT...