SN54HC74J datasheet by Texas Instruments

SN54HC74J Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that the SN54HC74J can handle?
  The maximum clock frequency of the SN54HC74J is 25 MHz.
• 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 VCC or GND, and use a pull-up or pull-down resistor to prevent floating inputs.
• What is the recommended operating voltage range for the SN54HC74J?
  The recommended operating voltage range for the SN54HC74J is 4.5V to 5.5V.
• Can I use the SN54HC74J in a 3.3V system?
  While the SN54HC74J is specified for 5V operation, it can be used in a 3.3V system, but the output voltage levels may not be compatible with 3.3V logic. Use a level translator or voltage regulator if necessary.
• How do I handle asynchronous inputs to the flip-flops?
  Asynchronous inputs should be synchronized to the clock signal using a synchronizer circuit or a flip-flop with a synchronous reset to prevent metastability issues.