SN74HCT574NSR datasheet by Texas Instruments

SN74HCT574NSR Frequently Asked Questions (FAQs)

• What is the maximum clock frequency that the SN74HCT574NSR can handle?
  The maximum clock frequency of the SN74HCT574NSR is 40 MHz.
• How do I ensure that the flip-flops are properly initialized during power-up?
  To ensure proper initialization, connect the preset (PRE) input to VCC and the clear (CLR) input to GND during power-up. This will set the outputs to a known state.
• What is the recommended operating voltage range for the SN74HCT574NSR?
  The recommended operating voltage range for the SN74HCT574NSR is 4.5V to 5.5V.
• Can I use the SN74HCT574NSR in a 3.3V system?
  While the SN74HCT574NSR 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. A level translator or voltage regulator may be required.
• How do I handle the asynchronous preset (PRE) and clear (CLR) inputs?
  The preset (PRE) and clear (CLR) inputs are asynchronous, meaning they can be asserted at any time, regardless of the clock signal. However, it's recommended to synchronize these inputs with the clock signal to avoid metastability issues.