SN74AC240DBR datasheet by Texas Instruments

SN74AC240DBR Frequently Asked Questions (FAQs)

• What is the maximum operating frequency of the SN74AC240DBR?
  The maximum operating frequency of the SN74AC240DBR is 100 MHz, but it can vary depending on the load capacitance and the output current.
• How do I handle the power-up and power-down sequencing of the SN74AC240DBR?
  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 SN74AC240DBR?
  The recommended termination scheme is to use a 33-ohm series resistor and a 47-pF capacitor to ground on each output pin to minimize ringing and reflections.
• Can I use the SN74AC240DBR in a 5V system?
  Yes, the SN74AC240DBR is compatible with 5V systems, but the input voltage should not exceed 5.5V to prevent damage to the device.
• How do I handle the thermal management of the SN74AC240DBR?
  The device should be mounted on a PCB with a thermal pad connected to a ground plane to dissipate heat. The maximum junction temperature is 150°C.