74HC165D datasheet by Philips Semiconductors

74HC165D Frequently Asked Questions (FAQs)

• What is the maximum clock frequency for the 74HC165D?
  The maximum clock frequency for the 74HC165D is 25 MHz, but it can vary depending on the operating voltage and load capacitance.
• How do I ensure reliable data transfer with the 74HC165D?
  To ensure reliable data transfer, make sure to meet the setup and hold time requirements, use a clock signal with a fast rise and fall time, and minimize noise on the clock and data lines.
• Can I use the 74HC165D as a parallel-in, serial-out shift register?
  Yes, the 74HC165D can be used as a parallel-in, serial-out shift register by applying the parallel data to the P0-P7 inputs and then clocking the data out serially through the Q7 output.
• What is the purpose of the PL and CLR pins?
  The PL (Parallel Load) pin is used to load parallel data into the shift register, and the CLR (Clear) pin is used to clear the shift register and set all outputs to low.
• How do I interface the 74HC165D with a microcontroller?
  The 74HC165D can be interfaced with a microcontroller by connecting the clock input to a microcontroller output, and the serial data output to a microcontroller input. The microcontroller can then control the clock signal to shift data in or out of the 74HC165D.