ULN2803A Datasheet PDF – Darlington Transistor Arrays

Part Number: ULN2803A

Function: Darlington Transistor Arrays

Package: SOP 18 Pin

Manufacturer: Texas Instruments


ULN2803A datasheet



The ULN2803A device is a high-voltage, high-current 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.Types of Logic 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.

Logic Diagram

ULN2803A pinout logic diagram


1. 500-mA-Rated Collector Current (Single Output)
2. High-Voltage Outputs: 50 V
3. Output Clamp Diodes
4. Inputs Compatible With Various Types of Logic


1. Relay Drivers
2. Hammer Drivers
3. Lamp Drivers
4. Display Drivers (LED and Gas Discharge)
5. Line Drivers
6. Logic Buffers
7. Stepper Motors
8. IP Camera
9. HVAC Valve and LED Dot Matrix

Other data sheets are available within the file: ULN2803ADW

ULN2803A Datasheet PDF Download

ULN2803A pdf