CD4031BE datasheet by Texas Instruments

CD4031BE Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that the CD4031BE can handle?
  The CD4031BE can handle clock frequencies up to 2.5 MHz, but it's recommended to operate it at a maximum frequency of 1 MHz for reliable operation.
• How do I ensure that the CD4031BE is properly reset during power-up?
  To ensure proper reset, connect the MR (Master Reset) pin to VCC through a 1kΩ resistor and a 10nF capacitor to ground. This will provide a clean reset signal during power-up.
• What is the recommended power-on sequence for the CD4031BE?
  The recommended power-on sequence is to apply VCC first, followed by the clock signal, and then the data inputs. This ensures that the device is properly initialized and ready for operation.
• How do I handle the asynchronous clear input (ACR) on the CD4031BE?
  The ACR input should be tied to VCC or GND through a 1kΩ resistor to prevent unwanted clearing of the counter. If you need to use the ACR input, ensure that it is synchronized with the clock signal to avoid metastability issues.
• What is the maximum output current that the CD4031BE can sink or source?
  The CD4031BE can sink or source up to 1.6 mA of current per output pin, but it's recommended to limit the output current to 1 mA or less to ensure reliable operation.