SN74HC74DRG4 datasheet by Texas Instruments

SN74HC74DRG4 Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that the SN74HC74DRG4 can handle?
  The maximum clock frequency of the SN74HC74DRG4 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 SN74HC74DRG4 is properly powered?
  To ensure proper power supply, connect VCC to a 2.0-V to 6.0-V power supply, and GND to the system ground. Decouple the power supply with a 0.1-μF ceramic capacitor.
• What is the purpose of the preset (PRE) input?
  The preset (PRE) input is used to asynchronously set the Q output to a logic high level, regardless of the clock (CLK) input. This is useful for initializing the flip-flop or for resetting the output.
• How do I handle the asynchronous clear (CLR) input?
  The asynchronous clear (CLR) input is used to reset the flip-flop. When CLR is low, the Q output is reset to a logic low level, regardless of the clock (CLK) input. Ensure that CLR is not asserted simultaneously with the clock edge to avoid metastability.
• What is the propagation delay of the SN74HC74DRG4?
  The propagation delay of the SN74HC74DRG4 is typically around 10-15 ns, but it can vary depending on the operating conditions and the load capacitance.