CD54HC164F datasheet by Texas Instruments

CD54HC164F Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that can be used with the CD54HC164F?
  The maximum clock frequency for the CD54HC164F is 25 MHz, but it can vary depending on the operating voltage and temperature. It's recommended to check the timing characteristics in the datasheet for specific frequency limits.
• How do I ensure that the CD54HC164F is properly powered and decoupled?
  To ensure proper power and decoupling, use a 0.1 μF ceramic capacitor between VCC and GND, and a 10 μF electrolytic capacitor between VCC and GND. Also, make sure to use a low-impedance power supply and keep the power traces short and wide.
• What is the maximum input voltage that can be applied to the CD54HC164F?
  The maximum input voltage for the CD54HC164F is 6 V, but it's recommended to keep the input voltage within the recommended operating range of 2 V to 6 V to ensure reliable operation.
• How do I handle the asynchronous clear (CLR) input?
  The asynchronous clear (CLR) input should be tied to VCC through a pull-up resistor (e.g., 1 kΩ) to prevent unwanted clearing of the shift register. When CLR is low, the shift register is cleared, and when CLR is high, the shift register operates normally.
• What is the recommended method for serially loading data into the CD54HC164F?
  To serially load data into the CD54HC164F, apply the data to the SER (serial input) pin, and then clock the data into the shift register using the CLK (clock) pin. Make sure to meet the setup and hold times specified in the datasheet.