ULN2803AG Darlington Transistor Arrays 50V 500mA SOP-18
The ULN2803AG is a high-voltage, high-current Darlington transistor array designed to interface low-power logic circuits with high-power loads. It contains eight Darlington pairs with common emitters and integrated suppression diodes for driving inductive loads such as relays, solenoids, and stepper motors. The device is commonly used to expand the output capability of microcontrollers, logic ICs, and embedded systems.
With its SOP-18 surface-mount package, the ULN2803AG is suitable for compact PCB designs while maintaining reliable switching performance. The built-in clamp diodes provide protection against voltage spikes generated by inductive loads, making the IC highly reliable in automation, industrial control, and embedded electronic systems.
Features:
- Eight high-current Darlington transistor pairs.
- High voltage output capability.
- Integrated flyback diodes for inductive load protection.
- Compatible with TTL and CMOS logic levels.
- Common emitter configuration.
- Designed for driving relays, lamps, and motors.
- Compact SOP-18 surface-mount package.
- Reliable and easy interface with microcontrollers.
Specifications:
| Parameter | Value |
|---|---|
| Model | ULN2803AG |
| Device Type | Darlington Transistor Array |
| Number of Channels | 8 |
| Output Voltage | 50V |
| Output Current | 500mA per channel |
| Input Compatibility | TTL / CMOS |
| Package Type | SOP-18 |
| Mounting Type | Surface Mount |
| Clamp Diodes | Integrated |
| Operating Temperature | -40°C to +85°C |
Pinout:
| Pin | Name | Description |
|---|---|---|
| 1 | IN1 | Channel 1 Input |
| 2 | IN2 | Channel 2 Input |
| 3 | IN3 | Channel 3 Input |
| 4 | IN4 | Channel 4 Input |
| 5 | IN5 | Channel 5 Input |
| 6 | IN6 | Channel 6 Input |
| 7 | IN7 | Channel 7 Input |
| 8 | IN8 | Channel 8 Input |
| 9 | GND | Ground |
| 10 | COM | Common diode connection |
| 11 | OUT8 | Channel 8 Output |
| 12 | OUT7 | Channel 7 Output |
| 13 | OUT6 | Channel 6 Output |
| 14 | OUT5 | Channel 5 Output |
| 15 | OUT4 | Channel 4 Output |
| 16 | OUT3 | Channel 3 Output |
| 17 | OUT2 | Channel 2 Output |
| 18 | OUT1 | Channel 1 Output |
Applications:
- Relay drivers.
- Stepper motor drivers.
- LED and lamp drivers.
- Microcontroller output expansion.
- Industrial automation systems.
- Solenoid and valve control.
- Embedded electronic systems.
Package Included:
- 1x ULN2803AG Darlington Transistor Arrays 50V 500mA SOP-18.
