ULN2803CDWR
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| Part Number | ULN2803CDWR |
|---|---|
| Manufacturer |
 Texas Instruments
|
| Description | The ULN2803CDWR is a widely used 8-channel NPN Darlington transistor array developed by Texas Instruments, designed for driving high-current loads from low-voltage logic signals. It integrates eight Darlington pairs in a single package, enabling efficient interfacing between microcontrollers and power devices. Each channel is capable of handling up to approximately 500 mA collector current and supports output voltages up to 50V, making it suitable for driving relays, solenoids, lamps, and stepper motors. The ULN2803CDWR features open-collector outputs with integrated clamp diodes, allowing safe switching of inductive loads by suppressing voltage spikes. It also includes built-in 2.7kΩ base resistors, enabling direct compatibility with TTL and 5V CMOS logic without additional components. Designed for versatility, the device allows parallel connection of output channels to achieve higher current capability when needed. Its architecture provides reliable switching performance in a wide range of industrial and embedded applications. The IC operates across a broad temperature range and is packaged in a compact 20-pin SOIC surface-mount form factor, making it suitable for high-density PCB designs and automated assembly processes. The ULN2803CDWR is commonly used in relay driving circuits, stepper motor control, LED displays, industrial automation, home appliances, and interface circuits, where reliable high-current switching and logic-level compatibility are required. |
| Product Group | Logic IC |
| MOQ | 2000 pcs |
| SPQ | 2000 pcs |
| Figure/Case | 20-SOIC |
| Package | T&R Pack |
 PDF Datasheet | |
| Ship From | Hong Kong |
| Shipment Way | DHL / Fedex / TNT / UPS / Others |
| Delivery Term | Ex-Works |
| Send RFQ | sales@signalhk.com |
| Feature | Description |
|---|---|
| Core | N/A (Driver IC) |
| Function | Darlington transistor array (high-voltage, high-current) |
| Input Voltage | 5V to 30V (depending on load and application) |
| Output Voltage | Up to 50V (depending on load and application) |
| Output Current | 500 mA per channel (total 8 channels) |
| Channels | 8 output channels |
| Control Pins | 8 input control pins (TTL compatible) |
| Package | SO-18 (18 pins) |
| Power Dissipation | 1W per channel (max) |
| Max Output Current | 500 mA per channel, up to 2A with all channels in parallel |
| Operating Temperature Range | -40°C to +85°C |
| Protection | Thermal shutdown, overvoltage, and overload protection |
| Applications | Stepper motors, relays, solenoids, lamp drivers, industrial control systems |
| Turn-on Time | 200 µs typical |
| Turn-off Time | 100 µs typical |
| Packaging | Tape and reel (TR) |
| Gate Drive Capability | Can drive inductive loads (e.g., stepper motors) |
| Internal Diodes | Integrated flyback diodes for inductive load protection |
| Development Tools | Supported by general-purpose logic development tools and test equipment |
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ULN2803CDWR
ULN2803CDWR