SLRS049H February   1997  – February 2017 ULN2803A

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Switching Characteristics
    7. 6.7 Typical Characteristics
  7. 7 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
    4. 8.4 Device Functional Modes
      1. 8.4.1 Inductive Load Drive
      2. 8.4.2 Resistive Load Drive
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Drive Current
        2. 9.2.2.2 Output Low Voltage
        3. 9.2.2.3 Power Dissipation and Temperature
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Receiving Notification of Documentation Updates
    2. 12.2 Community Resources
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • DW|18
Thermal pad, mechanical data (Package|Pins)
Orderable Information

1 Features

  • 500-mA-Rated Collector Current
    (Single Output)
  • High-Voltage Outputs: 50 V
  • Output Clamp Diodes
  • Inputs Compatible With Various Types of Logic

2 Applications

  • Relay Drivers
  • Hammer Drivers
  • Lamp Drivers
  • Display Drivers (LED and Gas Discharge)
  • Line Drivers
  • Logic Buffers
  • Stepper Motors
  • IP Camera
  • HVAC Valve and LED Dot Matrix

3 Description

The ULN2803A device is a 50 V, 500 mA Darlington transistor array. The device consists of eight NPN Darlington pairs that feature high-voltage outputs with common-cathode clamp diodes for switching inductive loads. The collector-current rating of each Darlington pair is 500 mA. The Darlington pairs may be connected in parallel for higher current capability.

Applications include relay drivers, hammer drivers, lamp drivers, display drivers (LED and gas discharge), line drivers, and logic buffers. The ULN2803A device has a 2.7-kΩ series base resistor for each Darlington pair for operation directly with TTL or 5-V CMOS devices.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
ULN2803ADW SOIC (18) 11.55 mm × 7.50 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Logic Diagram

ULN2803A logic_lrs049.gif