SN74HCT74D datasheet by Texas Instruments

SN74HCT74D Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that the SN74HCT74D can handle?
  The maximum clock frequency of the SN74HCT74D is 30 MHz, but it can vary depending on the specific application and operating conditions.
• How do I ensure that the SN74HCT74D 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 for each 10 devices on the board.
• What is the maximum current that the SN74HCT74D can sink or source?
  The SN74HCT74D can sink or source up to 6mA per output, but it's recommended to limit the current to 4mA per output to ensure reliable operation.
• How do I handle the asynchronous reset input (CLR) of the SN74HCT74D?
  The CLR input should be tied to VCC through a 1kΩ resistor and a 0.01uF capacitor to ensure proper reset operation. A pull-up resistor is not necessary.
• Can I use the SN74HCT74D in a 3.3V system?
  No, the SN74HCT74D is designed to operate at 5V and is not compatible with 3.3V systems. Use a level translator or a different device if you need to interface with 3.3V logic.