SN74HC645DW datasheet by Texas Instruments

SN74HC645DW Frequently Asked Questions (FAQs)

• What is the maximum operating frequency of the SN74HC645DW?
  The maximum operating frequency of the SN74HC645DW is 25 MHz, but it can vary depending on the specific application and operating conditions.
• How do I handle the power-up and power-down sequencing of the SN74HC645DW?
  It is recommended to power up the VCC pin before the input signals and power down the VCC pin after the input signals to prevent unwanted latch-up or damage to the device.
• What is the recommended operating voltage range for the SN74HC645DW?
  The recommended operating voltage range for the SN74HC645DW is 2 V to 6 V, with a typical operating voltage of 5 V.
• How do I ensure that the SN74HC645DW is properly terminated to prevent signal reflections?
  It is recommended to use a termination resistor (e.g., 50 ohms) at the output of the SN74HC645DW to prevent signal reflections and ensure signal integrity.
• Can I use the SN74HC645DW in a 3.3 V system?
  Yes, the SN74HC645DW can be used in a 3.3 V system, but the output voltage will be limited to 3.3 V, and the device may not operate at the maximum frequency.