LM393DE4 datasheet by Texas Instruments

LM393DE4 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 high-frequency noise. Additionally, ensure that the input signals are clean and free of noise.
• What is the minimum input voltage required for the comparator to function correctly?
  The minimum input voltage required for the comparator to function correctly is 2V. However, the device can operate down to 1.2V, but with reduced performance and accuracy.
• Can I use the LM393DE4 as an amplifier?
  No, the LM393DE4 is a comparator, not an amplifier. It is designed to compare two input voltages and output a digital signal indicating which input is higher. It is not intended for amplifying signals.
• How do I handle the output of the comparator if I need a push-pull output?
  The LM393DE4 has an open-drain output, which means it can only sink current. To get a push-pull output, you can add an external pull-up resistor to the output pin or use an external transistor to create a push-pull stage.