SN74HC74DR datasheet by Texas Instruments

SN74HC74DR Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that the SN74HC74DR can handle?
  The maximum clock frequency of the SN74HC74DR 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 SN74HC74DR is properly powered and decoupled?
  To ensure proper power and decoupling, use a 5V power supply, add a 0.1uF decoupling capacitor between VCC and GND, and use a 10uF bulk capacitor between VCC and GND. Also, ensure that the power supply is clean and free of noise.
• What is the maximum current that the SN74HC74DR can sink or source?
  The SN74HC74DR 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) of the SN74HC74DR?
  The CLR input should be tied to VCC through a pull-up resistor (e.g., 1kΩ) to ensure that the flip-flop is properly reset. A low-going pulse on CLR will reset the flip-flop.
• What is the propagation delay of the SN74HC74DR?
  The propagation delay of the SN74HC74DR is typically around 10-15ns, but it can vary depending on the operating conditions and the quality of the clock signal.