HCF4047BM1 datasheet by STMicroelectronics

HCF4047BM1 Frequently Asked Questions (FAQs)

• What is the recommended operating voltage range for HCF4047BM1?
  The recommended operating voltage range for HCF4047BM1 is 4.5V to 15V, although it can operate up to 18V with reduced performance.
• How do I ensure the HCF4047BM1 oscillator starts reliably?
  To ensure the oscillator starts reliably, make sure to decouple the power supply with a 100nF capacitor, use a high-quality quartz crystal with a suitable load capacitance, and keep the oscillator circuit layout as symmetrical as possible.
• What is the maximum frequency that the HCF4047BM1 can operate at?
  The HCF4047BM1 can operate up to 10MHz, but the maximum frequency is dependent on the specific application and the quality of the external components used.
• Can I use the HCF4047BM1 as a clock source for a microcontroller?
  Yes, the HCF4047BM1 can be used as a clock source for a microcontroller, but ensure that the microcontroller's clock input requirements are met, and the oscillator circuit is properly designed to minimize jitter and noise.
• How do I choose the correct load capacitance for the quartz crystal?
  The load capacitance (CL) should be chosen based on the quartz crystal's specifications and the oscillator circuit's requirements. A general rule of thumb is to use CL = 2 * (C1 + C2), where C1 and C2 are the capacitors connected between the crystal and ground.