ULN2065B datasheet by STMicroelectronics

ULN2065B Frequently Asked Questions (FAQs)

• What is the maximum current that each output can sink?
  The ULN2065B can sink up to 350mA per output, but it's recommended to limit it to 250mA for reliable operation.
• How do I protect the ULN2065B from back-EMF when driving inductive loads?
  Use a flyback diode (also known as a freewheeling diode) in parallel with the inductive load to absorb the back-EMF. This diode should be rated for the maximum voltage and current of the load.
• What is the minimum input voltage required for the ULN2065B to function properly?
  The ULN2065B can operate with input voltages as low as 3.5V, but it's recommended to use a minimum of 4.5V for reliable operation.
• Can I use the ULN2065B to drive a relay?
  Yes, the ULN2065B can be used to drive a relay, but make sure to choose a relay with a coil voltage and current rating that matches the ULN2065B's output capabilities.
• How do I calculate the power dissipation of the ULN2065B?
  The power dissipation of the ULN2065B can be calculated using the formula: Pd = (Vin - Vout) x Iout, where Vin is the input voltage, Vout is the output voltage, and Iout is the output current.