74HC73D,653 datasheet by NXP Semiconductors

74HC73D,653 Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that the 74HC73D can handle?
  The maximum clock frequency for the 74HC73D is 25 MHz, but it can operate up to 30 MHz with a reduced voltage supply (VCC) of 4.5V.
• 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 pull-up resistor (e.g., 1 kΩ) and a capacitor (e.g., 10 nF) to ground, respectively. This will ensure that the flip-flops are reset during power-up.
• Can I use the 74HC73D as a latch instead of a flip-flop?
  Yes, you can use the 74HC73D as a latch by connecting the clock (CLK) input to VCC or GND, depending on the desired latch behavior. However, keep in mind that this may not be the most efficient or recommended use of the device.
• What is the recommended operating voltage range for the 74HC73D?
  The recommended operating voltage range for the 74HC73D is 2V to 6V, with a typical voltage of 5V. Operating outside this range may affect the device's performance and reliability.
• How do I handle the asynchronous preset (PRE) and clear (CLR) inputs?
  When using the asynchronous preset and clear inputs, ensure that they are synchronized with the clock signal to avoid metastability issues. You can do this by using a synchronizer circuit or by ensuring that the preset and clear inputs are stable before the clock edge.