CD54HC4020F datasheet by Texas Instruments

CD54HC4020F Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that the CD54HC4020F can handle?
  The CD54HC4020F can handle clock frequencies up to 25 MHz, but it's recommended to check the timing specifications in the datasheet for specific frequency ranges.
• How do I ensure that the CD54HC4020F is properly powered?
  The CD54HC4020F requires a single 2-V to 6-V power supply, and it's essential to decouple the power pins with capacitors to minimize noise and ensure reliable operation.
• What is the maximum input voltage that the CD54HC4020F can tolerate?
  The CD54HC4020F has input voltage limits of -0.5 V to VCC + 0.5 V. Exceeding these limits can cause damage to the device.
• Can I use the CD54HC4020F in a 3.3-V system?
  Yes, the CD54HC4020F is compatible with 3.3-V systems, but ensure that the input signals are within the recommended voltage range and that the power supply is properly decoupled.
• How do I handle the asynchronous reset input (MR) on the CD54HC4020F?
  The asynchronous reset input (MR) should be tied to VCC through a pull-up resistor or connected to a reset signal. Leaving it unconnected can cause unpredictable behavior.