The recommended operating voltage range for the HEF4021BP is 5V to 15V, with a typical voltage of 10V.
To ensure proper power supply, connect the VCC pin to a stable voltage source, and the VSS pin to ground. Also, decouple the power supply with a 10uF capacitor between VCC and VSS.
The maximum clock frequency that the HEF4021BP can handle is 10MHz, but it's recommended to operate at a frequency below 5MHz for reliable operation.
The HEF4021BP can be reset by applying a low signal to the MR (Master Reset) pin. The MR pin should be connected to VSS through a 1kΩ resistor and a 10nF capacitor to ensure proper reset operation.
The propagation delay time of the HEF4021BP is typically around 20ns to 30ns, depending on the operating voltage and temperature.
