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MC14060BDTR2 Arkusz danych(PDF) 5 Page - ON Semiconductor |
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MC14060BDTR2 Arkusz danych(HTML) 5 Page - ON Semiconductor |
5 / 8 page MC14060B http://onsemi.com 5 Figure 3. Oscillator Circuit Using RC Configuration CLOCK 11 RESET RS Ctc Rtc 10 OUT 1 9 OUT 2 f [ 1 2.3 RtcCtc if 1 kHz ≤ f ≤ 100 kHz and 2Rtc < RS < 10Rtc (f in Hz, R in ohms, C in farads) The formula may vary for other frequencies. Recommended maximum value for the resistors in 1 M Ω. TYPICAL RC OSCILLATOR CHARACTERISTICS Figure 4. RC Oscillator Stability Figure 5. RC Oscillator Frequency as a Function of RTC and C – 8.0 –12 –16 – 4.0 0 4.0 8.0 125 100 75 50 25 0 –25 –55 TA, AMBIENT TEMPERATURE (°C) VDD = 15 V 1.0 V 5.0 V RTC = 56 kΩ C = 1000 pF RS = 0, f = 10.15 kHz @ VDD = 10, TA =25°C RS = 120 kΩ, f = 7.8 kHz @ VDD = 10 V, TA =25°C 100 50 20 10 5 2 1 0.5 0.2 0.1 1.0 k 10 k 100 k 1.0 M RTC, RESISTANCE (OHMS) 0.0001 0.001 0.01 0.1 C, CAPACITANCE ( µF) VDD = 10 V f AS A FUNCTION OF RTC (C = 1000 pF) (RS ≈ 2RTC) f AS A FUNCTION OF C (RTC = 56 kΩ) (RS = 120 k) Figure 6. Typical Crystal Oscillator Circuit CLOCK 11 RESET 9 OUT 2 10 OUT 1 18M RO CS CT Characteristic 500 kHz Circuit 32 kHz Circuit Unit Crystal Characteristics Resonant Frequency Equivalent Resistance, RS 500 1.0 32 6.2 kHz k Ω External Resistor/Capacitor Values RO CT CS 47 82 20 750 82 20 k Ω pF pF Frequency Stability Frequency Changes 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 Complete Oscillator (8.) TA Change from + 25_C to + 125 _C Complete Oscillator (8.) + 6.0 + 2.0 + 100 – 160 + 2.0 + 2.0 + 120 – 560 ppm ppm ppm ppm 8. Complete oscillator includes crystal, capacitors, and resistors. Figure 7. Typical Data for Crystal Oscillator Circuit |
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Podobny opis - MC14060BDTR2 |
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