The LM2901PWR from Texas Instruments is a quad differential comparator IC designed to compare voltages and provide digital outputs based on those comparisons. It comes in a 14-pin TSSOP (Thin Shrink Small Outline Package) format. Here's an overview of the LM2901PWR, covering its features, specifications, main uses, application areas, characteristics, working principle, and potential alternative models:



  • Manufacturer: Texas Instruments
  • IC Type: Quad Differential Comparator
  • Package Type: 14-pin TSSOP
  • Number of Comparators: 4
  • Supply Voltage: Typically operates from a single or dual power supply
  • Low Power Consumption: Suited for applications needing efficient power management


  • Number of Channels: Contains 4 independent comparator channels
  • Response Time: Provides fast response for voltage comparisons
  • Input Offset Voltage: Typically low for accurate comparisons
  • Input Common-Mode Voltage Range: Specifies the range of acceptable input voltages
  • Output Drive Capability: Capable of driving digital logic circuits
  • DataSheet LM2901PWR PDF

Main Uses:

  • Voltage Monitoring: Detecting voltage levels and variations in circuits
  • Overvoltage/Undervoltage Detection: Triggering alarms or shutdowns based on voltage thresholds
  • Signal Conditioning: Preparing signals for further processing
  • Zero-Crossing Detection: Identifying zero-crossing events in AC signals


  • Quad Comparator: Incorporates four independent voltage comparators in a single package
  • Low Input Bias Current: Minimizes loading effects on signal sources
  • Wide Supply Voltage Range: Compatible with various power supply configurations
  • Open-Collector Outputs: Enabling easy interfacing with other digital circuitry
  • Hysteresis Capability: Supports stable operation in noisy environments

Application Areas:

  • Switching Power Supplies: Overvoltage/undervoltage protection
  • Signal Conditioning Circuits: Amplification and filtering of signals
  • Automotive Electronics: Battery voltage monitoring, sensor interfacing
  • Industrial Control Systems: Monitoring and control of industrial processes

Working Principle:

  • The LM2901PWR compares the voltages present at its input pins and generates digital output signals based on these comparisons.
  • Each comparator within the IC operates independently, making it suitable for multiple comparison tasks simultaneously.
  • Output states change based on the relation of the voltage levels applied to the comparator inputs.

Alternative Models:

  • LM339: Another quad comparator IC from Texas Instruments with similar functionality
  • LM393: Dual voltage comparator IC for simpler applications
  • LT1711: High-speed comparator IC for precision applications

The LM2901PWR quad differential comparator is a versatile component commonly used for voltage comparison tasks in a wide range of electronic circuits. Refer to the official datasheet provided by Texas Instruments for detailed electrical characteristics, application notes, and circuit design guidelines when working with this specific IC.

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