SN54LS74AJ datasheet by Texas Instruments

SN54LS74AJ Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that the SN54LS74AJ can handle?
  The maximum clock frequency of the SN54LS74AJ is 35 MHz.
• How do I ensure that the flip-flops are properly initialized during power-up?
  To ensure proper initialization, connect the preset (PRE) and clear (CLR) inputs to VCC through a 1 kΩ resistor and a 0.01 μF capacitor to ground, respectively.
• What is the recommended operating voltage range for the SN54LS74AJ?
  The recommended operating voltage range for the SN54LS74AJ is 4.5 V to 5.5 V.
• Can I use the SN54LS74AJ in a 3.3 V system?
  No, the SN54LS74AJ is not recommended for use in 3.3 V systems. It is designed to operate at 5 V.
• How do I handle the asynchronous preset (PRE) and clear (CLR) inputs?
  The preset (PRE) and clear (CLR) inputs should be driven asynchronously, and the clock (CLK) input should be low when these inputs are active.