The ULN2003 and ULN2004 are 7‑channel Darlington driver arrays with open‑collector outputs and built‑in clamp diodes for inductive‑load protection. They are supplied in a 16‑pin DIP package, with an optional hermetic version for military and aerospace use.
The datasheet provides absolute maximum ratings, electrical characteristics, and typical performance curves, including voltage, current, power dissipation, and timing parameters for both devices.
| Maximum Collector Voltage (VCEMAX) | 50 V |
|---|---|
| Maximum Continuous Input Current | 235 mA |
| Total package power dissipation | 2.0 W |
| Output sink current per channel | 500 mA |
The devices are rated for a maximum collector‑emitter voltage of 50 V.
Each output can sink up to 500 mA of current.
ULN2003 uses a 2.7 kΩ series base resistor for each Darlington pair.
The input voltage (V IN) is limited to 30 V for both ULN2003 and ULN2004.