Transistor Array - ULN2803 (3 Pack)

This simple Transistor Array pack contains three SMD ULN2803 ICs from Texas Instruments. Each of these tiny ICs consists of eight NPN Darlington pairs that feature high-voltage outputs with common-cathode clamp diodes for switching a board's inductive loads with a collector current of 500mA. Each ULN2803 can absolutely be connected in parallel to achieve higher current capability.

The ULN2803 chips in the Transistor Array are ideal when used in applications like relay drivers, hammer drivers, lamp drivers, display drivers (LED and gas discharge), line drivers, and logic buffers. Additionally, each ULN2803 has a 2.7-kΩ series base resistor for each Darlington pair for operation directly with TTL or 5V CMOS devices.

  • 500mA-Rated Collector Current
  • High-Voltage Outputs: 50V outputs
  • Output Clamp Diodes
  • Inputs Compatible with Various Types of Logic
  • Relay-Driver Applications
  • Compatible with ULN2800A Series
  • Three Units in Each Order
  • [Datasheet](https://cdn.sparkfun.com/datasheets/Components/General IC/uln2803a.pdf)

Transistor Array - ULN2803 (3 Pack) Product Help and Resources

Core Skill: Soldering

This skill defines how difficult the soldering is on a particular product. It might be a couple simple solder joints, or require special reflow tools.

3 Soldering

Skill Level: Competent - You will encounter surface mount components and basic SMD soldering techniques are required.
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Core Skill: Programming

If a board needs code or communicates somehow, you're going to need to know how to program or interface with it. The programming skill is all about communication and code.

2 Programming

Skill Level: Rookie - You will need a better fundamental understand of what code is, and how it works. You will be using beginner-level software and development tools like Arduino. You will be dealing directly with code, but numerous examples and libraries are available. Sensors or shields will communicate with serial or TTL.
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Core Skill: Electrical Prototyping

If it requires power, you need to know how much, what all the pins do, and how to hook it up. You may need to reference datasheets, schematics, and know the ins and outs of electronics.

3 Electrical Prototyping

Skill Level: Competent - You will be required to reference a datasheet or schematic to know how to use a component. Your knowledge of a datasheet will only require basic features like power requirements, pinouts, or communications type. Also, you may need a power supply that?s greater than 12V or more than 1A worth of current.
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Comments

Looking for answers to technical questions?

We welcome your comments and suggestions below. However, if you are looking for solutions to technical questions please see our Technical Assistance page.

  • The eagle package for this product is wrong :(

    It is some package called "SO018" that as far as I can tell doesn't exist. It is the right pin spacing and length as the SOIC18, which this chip is, but is about half the width.

  • These are the NPN darlingtons... is there a PNP equivalent? Would be very useful for LED matrices! :)

  • re: SMD Impaired; How about a breakout board we can solder these to?

  • Ahem, any options for the SMD impaired?

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