SNOS532N September 2000  – April 2015 LMV7235 , LMV7239 , LMV7239-Q1


  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Pin Configuration and Functions
  6. Specifications
    1. 6.1Absolute Maximum Ratings
    2. 6.2ESD Ratings, LMV7235 and LMV7239
    3. 6.3ESD Ratings, LMV7239-Q1
    4. 6.4Recommended Operating Conditions
    5. 6.5Thermal Information
    6. 6.6Electrical Characteristics, 2.7 V
    7. 6.7Electrical Characteristics, 5 V
  7. Typical Performance Characteristics
  8. Detailed Description
    1. 8.1Overview
    2. 8.2Functional Block Diagram
    3. 8.3Feature Description
      1. 8.3.1Input Stage
      2. 8.3.2Output Stage, LMV7239 and LMV7239-Q1
      3. 8.3.3Output Stage, LMV7235
    4. 8.4Device Functional Modes
      1. 8.4.1Capacitive and Resistive Loads
      2. 8.4.2Noise
      3. 8.4.3Hysteresis
        1. Comparator with Hysteresis
        2. Comparator with Hysteresis
      4. 8.4.4Zero Crossing Detector
        1. Crossing Detector with Hysteresis
      5. 8.4.5Threshold Detector
  9. Application and Implementation
    1. 9.1Application Information
    2. 9.2Typical Applications
      1. 9.2.1Square Wave Oscillator
        1. Requirements
        2. Design Procedure
        3. Curves
      2. 9.2.2Crystal Oscillator
      3. 9.2.3Infrared (IR) Receiver
      4. 9.2.4Window Detector
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1Layout Guidelines
    2. 11.2Layout Example
  12. 12Device and Documentation Support
    1. 12.1Device Support
      1. 12.1.1Development Support
    2. 12.2Documentation Support
      1. 12.2.1Related Documentation
    3. 12.3Related Links
    4. 12.4Trademarks
    5. 12.5Electrostatic Discharge Caution
    6. 12.6Glossary
  13. 13Mechanical, Packaging, and Orderable Information


机械数据 (封装 | 引脚)

1 Features

  • VS = 5 V, TA = 25°C (Typical Values Unless Otherwise Specified)
  • Propagation Delay 75 ns
  • Low supply Current 65 µA
  • Rail-to-Rail Input
  • Open Drain and Push-pull Output
  • Ideal for 2.7-V and 5-V Single Supply Applications
  • Available in Space-saving Packages:
    • 5-pin SOT-23
    • 5-pin SC70
  • LMV7239-Q1 is Qualified for Automotive Applications:
    • Device Temperature AEC-Q100 Grade 1:
      -40°C to 125°C Operating Range
    • Device HBM ESD Classification Level 1C

2 Applications

  • Portable and Battery Powered Systems
  • Set Top Boxes
  • High Speed Differential Line Receiver
  • Window Comparators
  • Zero-crossing Detectors
  • High Speed Sampling Circuits

3 Description

The LMV7235, LMV7239 and LMV7239-Q1 are ultra low power, low voltage, 75-ns comparators. They are guaranteed to operate over the full supply voltage range of 2.7 V to 5.5 V. These devices achieve a 75 ns propagation delay while consuming only 65 µA of supply current at 5 V.

The LMV7235, LMV7239 and LMV7239-Q1 have a greater than rail-to-rail common mode voltage range. The input common mode voltage range extends 200 mV below ground and 200 mV above supply, allowing both ground and supply sensing.

The LMV7235 features an open drain output. By connecting an external resistor, the output of the comparator can be used as a level shifter.

The LMV7239 and LMV7239-Q1 features a push-pull output stage. This feature allows operation without the need of an external pull-up resistor.

The LMV7235, LMV7239 and LMV7239-Q1 are available in the 5-Pin SC70 and 5-Pin SOT-23 packages, which are ideal for systems where small size and low power is critical.

Device Information(1)

LMV7235, LMV7239 and LMV7239-Q1SOT-23 (5)2.90 mm x 1.60 mm
SC70 (5)2.00 mm x 1.25 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Supply Current vs. Supply Voltage

LMV7235 LMV7239 LMV7239-Q1 10135925.gif

Propagation Delay vs. Overdrive

LMV7235 LMV7239 LMV7239-Q1 10135931.gif