The ULx200xA devices are high-voltage, high-current Darlington transistor arrays. Each consists of seven NPN Darlington pairs that feature high-voltage outputs with common-cathode clamp diodes for switching inductive loads.
The collector-current rating of a single Darlington pair is 500mA. The Darlington pairs can be paralleled for higher current capability. Applications include relay drivers, hammer drivers, lamp drivers, display drivers (LED and gas discharge), line drivers, and logic buffers. For 100V (otherwise interchangeable) versions of the ULx2003A devices, see the SLRS023 data sheet for the SN75468 and SN75469 devices.
The ULN2002A device is designed specifically for use with 14V to 25V PMOS devices. Each input of this device has a Zener diode and resistor in series to control the input current to a safe limit. The ULx2003A devices have a 2.7kΩ series base resistor for each Darlington pair for operation directly with TTL or 5V CMOS devices.
The ULx2004A devices have a 10.5kΩ series base resistor to allow operation directly from CMOS devices that use supply voltages of 6V to 15V. The required input current of the ULx2004A device is below that of the ULx2003A devices, and the required voltage is less than that required by the ULN2002A device.
| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | ULN200x, ULQ200x High-Voltage, High-Current Darlington Transistor Arrays datasheet (Rev. T) | PDF | HTML | 21 Mar 2025 |
| E-book | 11 Ways to Protect Your Power Path | 03 Jul 2019 | ||
| Application note | Basics of Power Switches (Rev. A) | PDF | HTML | 26 Apr 2019 | |
| Application note | Stepper Motor Driving with Peripheral Drivers (Rev. A) | PDF | HTML | 02 Dec 2016 | |
| Technical article | How to create a dynamic power solution for stepper motors, relays and LEDs | PDF | HTML | 01 Nov 2016 | |
| User guide | BOOSTXL-ULN2003 Dual Stepper Motor Driver BoosterPack Hardware | 12 Apr 2016 | ||
| Application note | Improved Thermal Dissipation and Energy Efficiency for Peripheral Driving | 30 Oct 2014 |
For additional terms or required resources, click any title below to view the detail page where available.
The ULN2003A evaluation module (EVM) is used to enable hardware engineers to evaluate the full performance and functionality of the ULN2003A Darlington transistor arrays. The EVM is designed to be used as a stand-alone board with an attached voltage supply and output load to test and assess the (...)
The ULN2003ADYYEVM is a hardware evaluation module (EVM) used to enable hardware engineers to evaluate the full performance and functionality of the ULN2003ADYY Darlington Transistor Arrays. The ULN2003ADYYEVM is designed to be used as a standalone board with an attached voltage supply and output (...)
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| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| PDIP (N) | 16 | Ultra Librarian |
| SOIC (D) | 16 | Ultra Librarian |
| SOP (NS) | 16 | Ultra Librarian |
| SOT-23-THN (DYY) | 16 | Ultra Librarian |
| TSSOP (PW) | 16 | Ultra Librarian |
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