LM193N datasheet by STMicroelectronics

LM193N 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 that the output is not oscillating when the input voltages are close to each other?
  To prevent oscillation, add hysteresis to the input signals by connecting a small resistor (e.g., 1kΩ) and capacitor (e.g., 10nF) in series between the input pins and the output pin. This will help to stabilize the output.
• What is the minimum supply voltage required for the LM193N to operate correctly?
  The minimum supply voltage required for the LM193N to operate correctly is 2V. However, the device's performance may degrade at lower supply voltages, and it's recommended to use a minimum supply voltage of 4V for optimal performance.
• Can I use the LM193N as a zero-crossing detector?
  Yes, the LM193N can be used as a zero-crossing detector. However, it's essential to ensure that the input signals are properly biased and that the device is operated within its specified temperature range to ensure accurate detection.
• How do I choose the correct pull-up resistor value for the output pin?
  The pull-up resistor value depends on the load current and the desired output voltage. A general rule of thumb is to choose a pull-up resistor value between 1kΩ and 10kΩ. A higher value will reduce power consumption but may increase the output rise time.