The ULN2003A is a high‑voltage, high‑current Darlington transistor array that contains seven NPN Darlington pairs with common‑cathode clamp diodes. It is designed for relay, lamp, display, line‑driver, and logic‑buffer applications and can be driven directly from TTL or 5‑V CMOS devices.
The document lists absolute maximum ratings, detailed electrical and switching characteristics, ordering information for PDIP, SOIC, TSSOP and PW packages, and mechanical dimensions. It also includes a notice on warranty, availability, and usage terms.
| Collector‑emitter voltage (VCE) max | 50 V |
|---|---|
| Clamp diode reverse voltage | 50 V |
| Peak collector current per Darlington pair | 500 mA |
| Total emitter‑terminal current | 2.5 A |
| Operating temperature range | -40 °C to 105 °C |
| Storage temperature range | -65 °C to 150 °C |
The maximum collector current for a single Darlington pair is 500 mA.
It supports a collector‑emitter voltage of up to 50 V and a clamp diode reverse voltage of up to 50 V.
The device is rated for operation from –40 °C to 105 °C.