SLVS969G october   2009  – august 2023 TL331-Q1 , TL331B-Q1 , TL391B-Q1

PRODMIX  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Revision History
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1  Absolute Maximum Ratings, TL331-Q1
    2. 6.2  Absolute Maximum Ratings, TL331B-Q1 and TL391B-Q1
    3. 6.3  ESD Ratings, All Devices
    4. 6.4  Recommended Operating Conditions, TL331-Q1
    5. 6.5  Recommended Operating Conditions, TL331B-Q1 and TL391B-Q1
    6. 6.6  Thermal Information
    7. 6.7  Electrical Characteristics, TL331B-Q1 and TL391B-Q1
    8. 6.8  Switching Characteristics, TL331B-Q1 and TL391B-Q1
    9. 6.9  Electrical Characteristics, TL331-Q1
    10. 6.10 Switching Characteristics, TL331-Q1
    11. 6.11 Typical Characteristics, TL331-Q1
    12. 6.12 Typical Characteristics, TL331B-Q1 and TL391B-Q1
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
    4. 7.4 Device Functional Modes
      1. 7.4.1 Voltage Comparison
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Input Voltage Range
        2. 8.2.2.2 TL331B-Q1 and TL391B-Q1 ESD Protection
        3. 8.2.2.3 Minimum Overdrive Voltage
        4. 8.2.2.4 Output and Drive Current
        5. 8.2.2.5 Response Time
      3. 8.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Documentation Support
      1. 9.1.1 Related Documentation
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

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

3 Description

The TL331B-Q1 and TL391B-Q1 devices are the next generation versions of the industry-standard TL331-Q1 comparator. These next generation devices provide outstanding value for cost-sensitive applications, with features including lower offset voltage, higher supply voltage capability, lower supply current, lower input bias current, lower propagation delay, dedicated ESD protection cells with improved negative input voltage handling. The TL331B-Q1 can drop-in replace both the TL331-Q1 "I" and "Q" versions. The TL391B-Q1 provides an alternate pinout of the TL331B-Q1.

This device consists of a single voltage comparator designed to operate from a single power supply over a wide range of voltages. Operation from dual supplies also is possible if the difference between the two supplies is 2 V to 36 V and VCC is at least 1.5 V more positive than the input common-mode voltage. Current drain is independent of the supply voltage. To achieve wired-AND relationships, one can connect the output to other open-collector outputs.

Device Information
PART NUMBERPACKAGE (1)BODY SIZE (NOM)
TL331B-Q1,
TL391B-Q1,
TL331-Q1		SOT-23 (5)2.90 mm × 1.60 mm
(1) For all available packages, see the orderable addendum at the end of the data sheet.
Family Comparison Table
Specification TL331B-Q1TL391B-Q1 TL331I-Q1 TL331Q-Q1 Units
Supply Voltage 2 to 36 2 to 36 2 to 36 V
Total Supply Current (5V to 36V max) 0.43 0.7 0.7 mA
Temperature Range −40 to 125 -40 to 85 -40 to 125 °C
ESD (HBM) 2000 2000 2000 V
Offset Voltage (Max over temp) ± 4 ± 9 ± 9 mV
Input Bias Current (typ / max) 3.5 / 25 25 / 250 25 / 250 nA
Response Time (typ) 1 1.3 1.3 µsec