M74HC299B1R datasheet by STMicroelectronics

M74HC299B1R Frequently Asked Questions (FAQs)

• What is the maximum clock frequency for the M74HC299B1R?
  The maximum clock frequency for the M74HC299B1R is 100 MHz, but it can operate up to 150 MHz with a reduced voltage supply (VCC) of 4.5V.
• How do I ensure correct data alignment when using the M74HC299B1R as a shift register?
  To ensure correct data alignment, make sure to synchronize the clock signal (CP) with the data signal (D) and use the correct polarity for the clock signal. Also, ensure that the serial input (DS) is stable before the clock signal transitions.
• What is the recommended operating voltage range for the M74HC299B1R?
  The recommended operating voltage range for the M74HC299B1R is 2V to 6V, with a typical voltage of 5V. Operating outside this range may affect the device's performance and reliability.
• Can I use the M74HC299B1R as a parallel-in, parallel-out shift register?
  Yes, the M74HC299B1R can be used as a parallel-in, parallel-out shift register by connecting the parallel inputs (Q0-Q7) to the parallel outputs (Q0-Q7) and using the serial input (DS) as a parallel load input.
• How do I handle asynchronous clock signals when using the M74HC299B1R?
  To handle asynchronous clock signals, use a clock synchronization circuit or a flip-flop to synchronize the clock signal with the data signal. This ensures that the clock signal transitions do not occur during data transitions.