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MC14521BCP Fiches technique(PDF) 5 Page - ON Semiconductor |
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MC14521BCP Fiches technique(HTML) 5 Page - ON Semiconductor |
5 / 9 page MC14521B http://onsemi.com 5 Figure 2. Switching Time Test Circuit and Waveforms PULSE GENERATOR Q18 Q19 Q20 Q21 Q22 Q23 Q24 IN 2 R VDD VDD′ VSS VSS′ CL CL CL CL CL CL CL VDD 20 ns 20 ns 20 ns 10% 50% 90% 10% 50% 90% IN 2 Qn tPLH tPHL tTLH tTHL tWL tWH Characteristic 500 kHz Circuit 50 kHz Circuit Unit Crystal Characteristics Resonant Frequency Equivalent Resistance, RS 500 1.0 50 6.2 kHz kW External Resistor/Capacitor Values Ro CT CS 47 82 20 750 82 20 kW pF pF Frequency Stability Frequency Change as a Function of VDD (TA = 25_C) VDD Change from 5.0 V to 10 V VDD Change from 10 V to 15 V Frequency Change as a Function of Temperature (VDD = 10 V) TA Change from – 55_C to + 25_C MC14521 only Complete Oscillator* TA Change from +25_C to+125_C MC14521 only Complete Oscillator* + 6.0 + 2.0 – 4.0 + 100 – 2.0 – 160 + 2.0 + 2.0 – 2.0 + 120 – 2.0 – 560 ppm ppm ppm ppm ppm ppm *Complete oscillator includes crystal, capacitors, and resistors. Figure 4. Typical Data for Crystal Oscillator Circuit Figure 3. Crystal Oscillator Circuit VDD VDD VDD′ VSS VSS′ OUT 1 OUT 2 Q18 Q19 Q20 Q21 Q22 Q23 Q24 IN 1 IN 2 R R* R* CS CT Ro 18 M *Optional for low power operation, 10 kW ≤ R ≤ 70 kW. |
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Description similaire - MC14521BCP |
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