CD74HCT4046AE datasheet by Texas Instruments

CD74HCT4046AE Frequently Asked Questions (FAQs)

• What is the recommended operating voltage range for the CD74HCT4046AE?
  The recommended operating voltage range for the CD74HCT4046AE is 4.5V to 5.5V, although it can operate down to 3V with reduced performance.
• How do I ensure the PLL (Phase-Locked Loop) is properly locked in the CD74HCT4046AE?
  To ensure the PLL is properly locked, the VCO (Voltage-Controlled Oscillator) input frequency should be within the specified range, and the loop filter components should be selected according to the datasheet recommendations. Additionally, the PLL lock detect output (LD) can be used to monitor the lock status.
• What is the maximum clock frequency that the CD74HCT4046AE can handle?
  The maximum clock frequency that the CD74HCT4046AE can handle is 20MHz, although this may vary depending on the specific application and operating conditions.
• How do I minimize jitter and noise in the CD74HCT4046AE output?
  To minimize jitter and noise, use a high-quality clock source, ensure proper power supply decoupling, and use a low-noise voltage regulator. Additionally, the PLL loop filter components should be selected to minimize noise and jitter.
• Can I use the CD74HCT4046AE as a standalone frequency synthesizer?
  Yes, the CD74HCT4046AE can be used as a standalone frequency synthesizer, but it requires an external reference clock and a voltage-controlled oscillator (VCO) to generate the desired output frequency.