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The ULN2003AN from Texas Instruments is a versatile 7-channel Darlington transistor array designed for high-voltage and high-current applications. Each channel consists of an NPN Darlington pair with common-cathode clamp diodes, making it suitable for switching inductive loads. The device offers high-voltage outputs up to 50V and a collector current rating of 500mA per output, with the ability to parallel Darlington pairs for increased current capability.
This array is compatible with CMOS and TTL logic inputs. It operates within a temperature range of -40°C to 70°C. The ULN2003AN is available in a 16-pin PDIP package and is designed for through-hole mounting.
Key applications include relay drivers, hammer drivers, lamp drivers, display drivers (LED and gas discharge), line drivers, and logic buffers. The integrated output clamp diodes provide protection against voltage transients when switching inductive loads.
| Qty | Low | High |
|---|---|---|
| 1+ | $0.32 | $0.32 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
The maximum switching voltage is 50V.
The operating temperature range is -40°C to 70°C.
The peak output current per channel is 0.5A.
The ULN2003AN is supplied in a 16-PDIP package.
The inputs are compatible with CMOS and TTL logic.
The typical delay time is 250ns.
The maximum current rating per output channel is 500mA.