LM393DT datasheet by STMicroelectronics

LM393DT Frequently Asked Questions (FAQs)

• What is the maximum voltage that can be applied to the input pins?
  The maximum voltage that can be applied to the input pins is the supply voltage (VCC) + 0.3V. Exceeding this voltage can cause damage to the device.
• How do I ensure the comparator output is stable and not oscillating?
  To ensure a stable output, make sure to add a small capacitor (e.g., 10nF) between the output pin and ground to filter out any noise or oscillations.
• What is the minimum hysteresis required for reliable operation?
  The minimum hysteresis required for reliable operation is typically around 1-2mV, but this can vary depending on the specific application and noise environment.
• Can I use the LM393DT as an amplifier?
  No, the LM393DT is a comparator, not an amplifier. It is designed to compare two input voltages and output a digital signal, not to amplify a signal.
• How do I choose the right pull-up resistor value for the output pin?
  The pull-up resistor value depends on the load current and voltage requirements. A general rule of thumb is to choose a value between 1kΩ and 10kΩ, but consult the datasheet and application notes for specific guidance.