CD4047BD3 datasheet by Texas Instruments

CD4047BD3 Frequently Asked Questions (FAQs)

• What is the recommended operating voltage range for the CD4047BD3?
  The recommended operating voltage range for the CD4047BD3 is 3V to 15V, although it can operate up to 18V with reduced performance.
• How do I ensure the CD4047BD3 oscillator starts reliably?
  To ensure reliable oscillator startup, ensure that the power supply voltage is stable, and the capacitor values are within the recommended range. Also, add a pull-up resistor (e.g., 1kΩ) between the oscillator output (pin 9) and VCC.
• What is the maximum frequency of operation for the CD4047BD3?
  The maximum frequency of operation for the CD4047BD3 is approximately 1 MHz, although this can vary depending on the specific application and component values.
• Can I use the CD4047BD3 as a voltage-controlled oscillator (VCO)?
  Yes, the CD4047BD3 can be used as a VCO by applying a control voltage to the threshold input (pin 5) to vary the oscillator frequency.
• How do I minimize noise and jitter in the CD4047BD3 oscillator circuit?
  To minimize noise and jitter, use a high-quality quartz crystal, ensure good power supply decoupling, and add a bypass capacitor (e.g., 100nF) between VCC and GND. Also, consider using a shielded enclosure and minimizing stray capacitance.