SN74LS74AD datasheet by Texas Instruments

SN74LS74AD Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that the SN74LS74AD can handle?
  The maximum clock frequency of the SN74LS74AD is typically 25 MHz, but it can vary depending on the specific application and operating conditions.
• How do I ensure that the SN74LS74AD is properly reset during power-up?
  To ensure proper reset, connect the CLR (clear) input to a pull-up resistor and a capacitor to VCC. This will ensure that the flip-flop is reset during power-up.
• Can I use the SN74LS74AD as a latch instead of a flip-flop?
  Yes, the SN74LS74AD can be used as a latch by tying the clock input (CLK) to a logic high level. This will allow the device to behave as a level-sensitive latch.
• What is the minimum input pulse width required for the SN74LS74AD to trigger correctly?
  The minimum input pulse width required for the SN74LS74AD to trigger correctly is typically around 10 ns, but this can vary depending on the specific application and operating conditions.
• How do I handle metastability issues in the SN74LS74AD?
  To handle metastability issues, ensure that the clock signal is clean and has a fast rise time. You can also use synchronizers or other metastability-resistant design techniques to mitigate the issue.