Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Channels | 7 NPN Darlington low-side channels |
| Collector Voltage | 50 V |
| Collector Current | 500 mA rated single-output class |
| Input Resistors | 2.7 kΩ series base resistor per channel |
| Logic Compatibility | TTL or 5-V CMOS-oriented inputs |
| Inductive Loads | Common-cathode clamp diodes included |
| Temperature Grade | AI grade, −40°C to +105°C |
| Exact Package / Packing | SOIC (D), 16 pins; 2500-piece large reel; marking ULN2003AI |
Product Overview
ULN2003AIDR is a seven-channel low-side Darlington driver for relays, lamps, solenoids and small motors. Each channel accepts logic through a 2.7-kΩ base resistor and provides an open-collector-style high-voltage output.
Integrated clamp diodes simplify inductive loads when COM is connected to the appropriate positive load supply. The 500-mA figure applies to a single channel; simultaneous-channel package dissipation can reduce practical current per channel.
The AI suffix is an industrial-temperature grade. That distinguishes it from standard ULN2003A versions even though the channel count and input resistor architecture are the same.
For related devices, see HKEQGOO’s Bipolar Transistor Arrays category.
Technical Specifications
| Parameter | Verified Information |
|---|---|
| Manufacturer | Texas Instruments |
| Exact MPN | ULN2003AIDR |
| Channels | 7 NPN Darlington low-side channels |
| Collector Voltage | 50 V |
| Collector Current | 500 mA rated single-output class |
| Input Resistors | 2.7 kΩ series base resistor per channel |
| Logic Compatibility | TTL or 5-V CMOS-oriented inputs |
| Inductive Loads | Common-cathode clamp diodes included |
| Temperature Grade | AI grade, −40°C to +105°C |
| Exact Package / Packing | SOIC (D), 16 pins; 2500-piece large reel; marking ULN2003AI |
| Manufacturer Status | Active / Production |
| Part Marking | ULN2003AI |
Functional Highlights
Integrated diode clamps reduce relay/solenoid BOM
Seven inductive loads can share the COM clamp connection instead of requiring one flyback diode per external transistor stage.
AI grade extends operating temperature without changing logic interface
Existing 5-V logic designs can retain the familiar ULN2003 input network while gaining the wider temperature rating.
Design Considerations
- Connect COM correctly for inductive clamp operation; leave it application-appropriate for noninductive loads.
- Calculate package dissipation for the number of simultaneous conducting channels.
- Remember Darlington saturation voltage is higher than a modern low-RON MOSFET array.
Product Status and Exact Order Code
Manufacturer status: Active / Production
Texas Instruments lists ULN2003AIDR as Active / Production; SOIC (D), 16 pins; 2500-piece large tape and reel; −40°C to +105°C; marking ULN2003AI.
Related Engineering Resources
Quality & Verification Support
Third-party inspection or testing can be arranged according to customer requirements. Testing fees are borne by the buyer. Additional verification requirements can be discussed before shipment. After an order is placed, physical product, label, packaging, and Date Code photos may be provided where appropriate.
Request a Quote
To request a quotation, provide the manufacturer part number, required quantity, destination, target Date Code if applicable, and any testing or inspection requirements.
