SN74HCT74DR datasheet by Texas Instruments

SN74HCT74DR Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that the SN74HCT74DR can handle?
  The maximum clock frequency of the SN74HCT74DR is 30 MHz, but it can vary depending on the specific application and operating conditions.
• How do I ensure that the flip-flops are properly initialized on power-up?
  To ensure proper initialization, connect the preset (PRE) and clear (CLR) inputs to a valid logic level during power-up. You can also use an external reset circuit to initialize the flip-flops.
• What is the recommended operating voltage range for the SN74HCT74DR?
  The recommended operating voltage range for the SN74HCT74DR is 4.5V to 5.5V, with a typical voltage of 5V.
• How do I handle the asynchronous preset (PRE) and clear (CLR) inputs?
  The preset and clear inputs are asynchronous, meaning they can be asserted at any time, including during clock transitions. Ensure that these inputs are synchronized with the clock signal to avoid metastability issues.
• What is the propagation delay time for the SN74HCT74DR?
  The propagation delay time for the SN74HCT74DR is typically around 10-15 ns, but it can vary depending on the specific application and operating conditions.