SLCS005AG October   1979  – January 2025 LM193 , LM2903 , LM2903B , LM2903V , LM293 , LM293A , LM393 , LM393A , LM393B

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1  Absolute Maximum Ratings
    2. 5.2  Recommended Operating Conditions
    3. 5.3  Thermal Information: LMx93x and LM2903x
    4. 5.4  ESD Ratings
    5. 5.5  Electrical Characteristics LM393B
    6. 5.6  Electrical Characteristics LM2903B
    7. 5.7  Switching Characteristics LM393B and LM2903B
    8. 5.8  Electrical Characteristics for LM193, LM293, and LM393 (without A suffix)
    9. 5.9  Electrical Characteristics for LM293A and LM393A
    10. 5.10 Electrical Characteristics for LM2903, LM2903V, and LM2903AV
    11. 5.11 Switching Characteristics: LM193, LM239, LM393, LM2903, all 'A' and 'V' versions
    12. 5.12 Typical Characteristics, LMx93x and LM2903x
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
    4. 6.4 Device Functional Modes
      1. 6.4.1 Voltage Comparison
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Input Voltage Range
        2. 7.2.2.2 Minimum Overdrive Voltage
        3. 7.2.2.3 Output and Drive Current
        4. 7.2.2.4 Response Time
      3. 7.2.3 Application Curves
      4. 7.2.4 Power Supply Recommendations
      5. 7.2.5 Layout
        1. 7.2.5.1 Layout Guidelines
        2. 7.2.5.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Receiving Notification of Documentation Updates
    2. 8.2 Support Resources
    3. 8.3 Trademarks
    4. 8.4 Electrostatic Discharge Caution
    5. 8.5 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

6.3 Feature Description

The comparator consists of a PNP darlington pair input, allowing the device to operate with very high gain and fast response with minimal input bias current. The input Darlington pair creates a limit on the input common mode voltage capability, allowing the comparator to accurately function from ground to VCC– 2V over temperature. A clamp was added around Q3 to mimic the both inputs above input voltage range behavior of the original classic silicon.

The output consists of an open drain NPN (pull-down or low side) transistor. The output NPN sinks current when the negative input voltage is higher than the positive input voltage and the offset voltage. The VOL is resistive and scales with the output current. Please see the "Output Low Voltage vs. Output Sinking Current" graphs for VOL values with respect to the output current.