SN74HCT645DW datasheet by Texas Instruments

SN74HCT645DW Frequently Asked Questions (FAQs)

• What is the maximum operating frequency of the SN74HCT645DW?
  The maximum operating frequency of the SN74HCT645DW is 30 MHz, but it can vary depending on the system design and capacitive load.
• How do I ensure signal integrity when using the SN74HCT645DW in a high-speed application?
  To ensure signal integrity, use a low-impedance PCB design, minimize trace lengths, and use termination resistors or series resistors to reduce signal reflections and ringing.
• Can I use the SN74HCT645DW in a 5V system?
  Yes, the SN74HCT645DW is compatible with 5V systems, but ensure that the input voltage does not exceed the recommended maximum of 5.5V to prevent damage to the device.
• How do I handle power sequencing when using the SN74HCT645DW in a system with multiple power rails?
  To prevent latch-up or damage, ensure that the VCC pin is powered up before the input signals, and that the input signals are stable before the VCC pin is powered down.
• What is the recommended pull-up resistor value for the OE (output enable) pin?
  The recommended pull-up resistor value for the OE pin is between 1 kΩ and 10 kΩ, depending on the system requirements and noise immunity.