74HC74D,653 datasheet by NXP Semiconductors

74HC74D,653 Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that the 74HC74D can handle?
  The maximum clock frequency of the 74HC74D 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 flip-flops are properly initialized on power-up?
  To ensure proper initialization, connect the preset (PRE) and clear (CLR) inputs to a logic level that corresponds to the desired initial state. You can also use an external reset signal to initialize the flip-flops.
• What is the recommended operating voltage range for the 74HC74D?
  The recommended operating voltage range for the 74HC74D is 2.0 V to 6.0 V, with a typical voltage of 5.0 V.
• How do I handle the asynchronous reset (CLR) input?
  The asynchronous reset (CLR) input should be connected to a logic level that corresponds to the desired reset state. When CLR is low, the flip-flops are reset, and when CLR is high, the flip-flops operate normally.
• What is the propagation delay time for the 74HC74D?
  The propagation delay time for the 74HC74D is typically around 10 ns to 20 ns, depending on the operating conditions and the quality of the clock signal.