CD74HC74EE4 datasheet by Texas Instruments

CD74HC74EE4 Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that the CD74HC74EE4 can handle?
  The CD74HC74EE4 can handle clock frequencies up to 25 MHz, but it's recommended to check the specific application and operating conditions to ensure reliable operation.
• 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 CD74HC74EE4?
  The recommended operating voltage range for the CD74HC74EE4 is 2 V to 6 V, with a typical operating voltage of 5 V. However, it's essential to check the specific application and operating conditions to ensure reliable operation.
• Can I use the CD74HC74EE4 in a 3.3 V system?
  Yes, the CD74HC74EE4 can operate at 3.3 V, but you need to ensure that the input signals are within the recommended voltage range (0.8 V to 2.7 V) to maintain reliable operation.
• How do I handle the asynchronous preset and clear inputs?
  The asynchronous preset and clear inputs (PRE and CLR) should be driven by a signal that meets the recommended input voltage range and has a rise and fall time of less than 10 ns to ensure reliable operation.