SN74HC595NSR datasheet by Texas Instruments

SN74HC595NSR Frequently Asked Questions (FAQs)

• What is the maximum clock frequency for the SN74HC595NSR?
  The maximum clock frequency for the SN74HC595NSR is 25 MHz, but it can vary depending on the operating conditions and the quality of the clock signal.
• How do I ensure that the output pins are in a known state during power-up?
  To ensure that the output pins are in a known state during power-up, you can use the output enable (OE) pin to disable the outputs during power-up, and then enable them once the device is fully powered up and configured.
• What is the purpose of the MR (Master Reset) pin?
  The MR (Master Reset) pin is used to asynchronously reset the shift register and output latch, clearing all outputs to a low state. This pin can be used to reset the device to a known state during power-up or in response to a system reset.
• Can I use the SN74HC595NSR as a level shifter?
  Yes, the SN74HC595NSR can be used as a level shifter, but it's not the most efficient or recommended use case. The device is primarily designed as a shift register, and using it as a level shifter may not take full advantage of its capabilities.
• How do I handle the latency between the clock signal and the output pins?
  The latency between the clock signal and the output pins is typically around 10-20 ns, depending on the operating conditions. To handle this latency, you can use a clock signal that is synchronized with the data signal, or use a separate clock signal that is delayed by the latency amount.