| Category | |
| Manufacturer Name | |
| Current | |
| DC Current Gain (hFE) (Min) @ Ic, Vce | |
| Input Voltage | |
| Mounting Type | |
| Operating Temperature | |
| Output Current | |
| Output Voltage | |
| Power | |
| Storage Temperature | |
| Supplier Device Package | |
| Supplier Package | |
| Transistor Type | |
| Vce Saturation (Max) @ Ib, Ic | |
| Voltage |
The ULN2803A from STMicroelectronics is a high-voltage, high-current Darlington driver IC. It comprises 8 NPN Darlington pairs, all sharing a common emitter and featuring open-collector outputs. Each pair includes a 2.7KΩ resistor, making it compatible with TTL and 5V CMOS logic for data processing without the need for logic buffers.
This device is designed for applications requiring high output voltage and current, with a maximum output voltage of 50V and a sink current capability of up to 500mA per channel. The operating temperature range is -40°C to 85°C.
The ULN2803A is suitable for driving various loads, including relays, clamp drivers, stepper motors, and magnet valves. It is available in a 18-DIP (Through Hole) package, facilitating easy integration into circuit designs.
Key electrical characteristics include a minimum DC current gain (hFE) of 1000 at 350mA and 2V, and a maximum saturation voltage of 1.6V at 350mA and 500µA input current. The device also includes clamp diodes for switching inductive loads.
| Qty | Low | High |
|---|---|---|
| 1+ | $0.99 | $0.99 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
The maximum output voltage is 50V.
The maximum output current per channel is 500mA.
The ULN2803A is available in an 18-DIP (0.300", 7.62mm) through-hole package.
The operating junction temperature range is -40°C to 150°C.
Yes, it has integrated clamp diodes with a maximum reverse voltage of 55V and a maximum forward current of 25mA.
The minimum DC current gain is 1000 at 350mA collector current and 2V collector-emitter voltage.
The maximum turn-on and turn-off delays are both 1.0µS.