M74HC164M1R datasheet by STMicroelectronics

M74HC164M1R Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that can be used with the M74HC164M1R?
  The maximum clock frequency for the M74HC164M1R 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 shift register outputs are stable during power-up?
  To ensure stable outputs during power-up, it's recommended to add a pull-up or pull-down resistor to the output pins and to use a power-on reset circuit to initialize the shift register.
• Can I use the M74HC164M1R as a serial-to-parallel converter?
  Yes, the M74HC164M1R can be used as a serial-to-parallel converter. The serial input data is shifted into the register on the rising edge of the clock, and the parallel output is available at the output pins.
• What is the maximum current that can be sourced or sunk by the output pins?
  The maximum current that can be sourced or sunk by the output pins of the M74HC164M1R is 25 mA. However, it's recommended to check the output current limits in the datasheet for specific applications.
• How do I handle asynchronous clock and data inputs?
  To handle asynchronous clock and data inputs, it's recommended to use a synchronizer circuit or a flip-flop to synchronize the data with the clock signal. This ensures that the data is sampled correctly and reduces the risk of metastability.