LM239N datasheet by STMicroelectronics

LM239N Frequently Asked Questions (FAQs)

• What is the maximum operating temperature range for the LM239N?
  The LM239N can operate from -40°C to 125°C, but the maximum junction temperature (TJ) should not exceed 150°C.
• Can I use the LM239N as a comparator with an open-drain output?
  Yes, the LM239N can be used as an open-drain comparator by connecting a pull-up resistor to the output pin. However, this configuration may affect the output rise time and noise immunity.
• How do I ensure the LM239N is stable and doesn't oscillate?
  To ensure stability, make sure to decouple the power supply pins with capacitors, use a low-ESR capacitor for the output stage, and avoid using long traces or wires that can cause oscillations.
• What is the minimum input common-mode voltage range for the LM239N?
  The minimum input common-mode voltage range for the LM239N is typically around 2V below the positive supply rail (VCC). However, this can vary depending on the specific application and operating conditions.
• Can I use the LM239N as a voltage reference?
  While the LM239N has a built-in voltage reference, it's not designed to be used as a standalone voltage reference. The internal reference is primarily used for the comparator's internal circuitry. If you need a voltage reference, consider using a dedicated voltage reference IC.