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MC14553B Arkusz danych(PDF) 4 Page - ON Semiconductor |
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MC14553B Arkusz danych(HTML) 4 Page - ON Semiconductor |
4 / 8 page MC14553B http://onsemi.com 4 Figure 2. 3−Digit Counter Timing Diagram (Reference Figure 4) UNITS CLOCK UNITS Q0 UNITS Q1 UNITS Q2 UNITS Q3 TENS CLOCK TENS Q0 TENS Q3 HUNDREDS CLOCK HUNDREDS Q0 HUNDREDS Q3 DISABLE OVERFLOW MASTER RESET SCAN OSCILLATOR DIGIT SELECT 1 DIGIT SELECT 2 DIGIT SELECT 3 UP AT 80 UP AT 980 UP AT 800 (DISABLES CLOCK WHEN HIGH) UNITS TENS HUNDREDS PULSE GENERATOR (a) 16 VDD Q3 Q2 Q1 Q0 O.F. DS1 DS2 DS3 8VSS C LE DIS MR CL CL CL CL CL GENERATOR 1 (b) VDD Q3 Q2 Q1 Q0 O.F. DS1 DS2 DS3 VSS C LE MR DIS CL CL CL CL CL GENERATOR 2 GENERATOR 3 20 ns 20 ns 90% 10% tPLH tPHL 50% 50% tTHL tTLH 10% 90% 50% 1/fcl tWL(cl) tTLH 50% OVERFLOW BCD OUT CLOCK 90% 10% trem tPHL, tPLH 50% 50% 50% tWH(R) tsu tPHL MASTER RESET BCD OUT LATCH ENABLE CLOCK Figure 3. Switching Time Test Circuits and Waveforms tsu tPHL |
Podobny numer części - MC14553B_06 |
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Podobny opis - MC14553B_06 |
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