Moteur de recherche de fiches techniques de composants électroniques |
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LS7055 Fiches technique(PDF) 6 Page - LSI Computer Systems |
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LS7055 Fiches technique(HTML) 6 Page - LSI Computer Systems |
6 / 6 page 7055-012703-6 THUMBWHEEL SWITCHES LS7055/LS7056 7 SEGMENT OUTPUT 2.5k Ω (typical) 10k Ω (typical) DIGITAL SELECT OUTPUTS FIGURE 6. Driving a small LED Display (Typically 1/8") at 12V power supply. The 2.7k Ω resistors provide approximately 3 mA segment drive. PRESET STORE BCD TO 7 SEGMENT DECODER MULTIPLEXER BLANKING GENERATOR LATCH MAINSIGNAL STORE MAINSIGNAL COMPARATOR PRESIGNAL STORE PRESIGNAL COMPARATOR ZERO DETECTOR 6 DECADE UP/DOWN COUNTER COUNTER RESET COUNTER PRESET UP/DOWN CONTROL BLANKING OVERRIDE INPUT LAMP TEST INPUT (OPTIONAL-LS7056) 7 SEGMENT OUTPUTS BCD OUTPUTS DIGIT SELECT OUTPUTS DIGIT SELECT GENERATOR SCAN OSCILLATOR DATA TRANSFER INPUT DECODER STORAGE SELECT 1 STORAGE SELECT 2 DIVIDE CONTROL INPUT 1 DIVIDE CONTROL INPUT 2 BCD DATA INPUTS COUNT INPUT COUNT INHIBIT INPUT +1, 5, 6 SELECT MAINSIGNAL STORE PRESIGNAL STORE PRESET STORE COUNT 15 16 1 40 3 2 31 MAINSIGNAL OUTPUT PRESIGNAL OUTPUT ZERO DETECT OUTPUT INHIBIT INTERNAL PRESET INPUT RESET INPUT PRESET ENABLE INPUT UP/DOWN INPUT INHIBIT INTERNAL RESET INPUT 9 36 38 5 4 6 7 39 FIGURE 7. LS7055/LS7056 BLOCK DIAGRAM SCAN INPUT CLOCK 10 11 12 13 B1 B4 B2 B8 17 18 19 20 21 22 32 33 34 35 24 25 26 27 28 29 30 |
Numéro de pièce similaire - LS7055 |
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Description similaire - LS7055 |
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