This document describes the features and characteristics of the ULN2001A, ULN2002A, ULN2003, and ULN2004A, which are four high voltage, high current Darlington arrays. Each array contains seven open collector Darlington pairs with common emitters. Each channel is rated at 500mA and can withstand peak currents of 600mA. Suppression diodes are included for inductive load driving, and the inputs are pinned opposite the outputs to simplify board layout. The four versions interface to all common logic families: ULN2001A General Purpose, DTL, TTL, PMOS, CMOS; ULN2002A 14-25V PMOS; ULN2003A 5V TTL, CMOS; ULN2004A 6-15V CMOS, PMOS. These versatile devices are useful for driving a wide range of loads, including solenoids, relays, DC motors, LED displays, filament lamps, thermal print heads, and high power buffers.
The ULN2001A‑2004A series are high‑voltage, high‑current Darlington driver arrays, each containing seven open‑collector Darlington pairs with common emitters. Each channel is rated for 500 mA continuous collector current (600 mA peak) and can handle up to 50 V output, with integrated suppression diodes for inductive loads. The devices accept TTL, CMOS, DTL and PMOS inputs and are available in DIP‑16 and SO‑16 packages.
Key specifications include a continuous collector current of 500 mA, output voltage rating of 50 V, input voltage up to 30 V for certain variants, and a thermal resistance junction‑to‑ambient of 70 °C/W. Mechanical dimensions are provided for both DIP‑16 and SO‑16 packages, and the document includes absolute maximum ratings, electrical characteristics, thermal data, and test circuit examples.
| Output current per driver | 500 mA |
|---|---|
| Output voltage rating | 50 V |
| Continuous collector current (Ic) | 500 mA |
| Input voltage (Vin) for ULN2002A/D‑2003A/D‑2004A/D | 30 V |
| Thermal resistance (junction‑ambient) | 70 °C/W |
Each channel can handle a continuous collector current of 500 mA.
The devices are rated for an output voltage of up to 50 V.
They are offered in a 16‑pin DIP package and also in a small outline SO‑16 package.
Yes, integrated suppression diodes are provided for inductive load driving.