The LM393 is a dual voltage comparator chip commonly used in various electronic circuits. Here is a detailed introduction to the LM393P dual differential comparator by Rochester Electronics:


LM393P Dual Differential Comparator by Rochester Electronics


  • Manufacturer: Rochester Electronics
  • Part Number: LM393P
  • Type: Dual Voltage Comparator

Key Features:

  • Dual Comparator: Contains two independent voltage comparators in a single package.
  • Differential Input: Compares two voltage levels and provides a high or low output based on the comparison.
  • Open-Collector Outputs: Allows for easy interfacing with other digital circuits.
  • Wide Voltage Supply Range: Typically works well with a wide range of supply voltages.
  • Low Power Consumption: Suitable for battery-powered applications.
  • DataSheet

    LM393P PDF

Features and Applications:

  • Voltage Comparison: Compares two input voltage levels and generates a digital output based on the comparison.
  • Signal Conditioning: Used for signal conditioning in various electronic circuits.
  • Threshold Detection: Detects when a signal crosses a specific threshold level.
  • Waveform Synchronization: Aligns signals for precise synchronization in timing circuits.
  • Overvoltage Protection: Utilized for overvoltage protection in sensor circuits.

Package Information:

  • DIP Package (Dual Inline Package): Commonly a 8-pin DIP package for easy through-hole mounting.


  • Voltage Monitoring: Used in voltage monitoring circuits.
  • Sensor Interfacing: Interfaces with sensors to trigger actions based on input voltages.
  • Comparator Circuits: Forms the basis of comparator circuits for various applications.
  • Signal Conditioning: Conditions analog signals for processing in digital systems.
  • Overvoltage Protection: Protects circuits from overvoltage conditions.


  • Versatility: Suitable for a wide range of voltage comparison applications.
  • Reliability: Manufactured by Rochester Electronics, known for quality electronic components.
  • Ease of Use: Straightforward to integrate into different circuit designs.
  • Low Power Consumption: Ideal for applications where power efficiency is important.
  • Cost-Effective Solution: Provides essential voltage comparison functions at an affordable price.

The LM393P dual differential comparator by Rochester Electronics is a versatile component commonly used in voltage comparison, signal conditioning, and threshold detection applications. Its dual comparator design, differential inputs, and open-collector outputs make it suitable for various electronics projects where precise voltage comparison and signal monitoring are required. The component's low power consumption and wide voltage supply range enhance its usability in a variety of applications.

For detailed electrical characteristics, application circuit examples, and further integration guidelines, it is advisable to consult the datasheet provided for the LM393P comparator by Rochester Electronics.