SN74HC245DWRE4 datasheet by Texas Instruments

SN74HC245DWRE4 Frequently Asked Questions (FAQs)

• What is the maximum operating frequency of the SN74HC245DWRE4?
  The maximum operating frequency of the SN74HC245DWRE4 is 50 MHz, but it can vary depending on the system design and capacitive loading.
• How do I handle the power-up and power-down sequencing of the SN74HC245DWRE4?
  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 output states.
• What is the recommended termination scheme for the SN74HC245DWRE4?
  The recommended termination scheme is to use a 50-ohm pull-up resistor to VCC for each output pin, and a 50-ohm pull-down resistor to GND for each input pin.
• Can I use the SN74HC245DWRE4 in a 5V system?
  Yes, the SN74HC245DWRE4 is compatible with 5V systems, but it is recommended to use a voltage regulator to ensure a stable 4.5V to 5.5V supply voltage.
• How do I handle the thermal management of the SN74HC245DWRE4?
  The SN74HC245DWRE4 has a maximum junction temperature of 150°C. It is recommended to use a heat sink or thermal pad to keep the junction temperature below 125°C for reliable operation.