SN74HC74N datasheet by Texas Instruments

SN74HC74N Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that the SN74HC74N can handle?
  The maximum clock frequency of the SN74HC74N 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 SN74HC74N is properly powered and decoupled?
  To ensure proper power and decoupling, use a 5V power supply with a minimum of 10uF decoupling capacitor between VCC and GND, and place the capacitor as close to the device as possible.
• What is the maximum current that the SN74HC74N can sink or source?
  The SN74HC74N can sink or source up to 25mA of current per output pin, but it's recommended to limit the current to 10mA or less to ensure reliable operation.
• How do I handle the asynchronous reset input (CLR) and preset input (PRE) of the SN74HC74N?
  The CLR and PRE inputs are active-low, asynchronous inputs that can be used to reset or preset the flip-flop. Connect them to VCC through a pull-up resistor (e.g., 1kΩ) and use a logic signal to drive them low to assert the reset or preset function.
• What is the propagation delay of the SN74HC74N, and how does it affect my design?
  The propagation delay of the SN74HC74N is typically around 10-15ns, which can affect the timing of your design. Ensure that you account for this delay when designing your clock and data signals.