The eight NPN Darlington connected transistors in this family of arrays are ideally suited for interfacing between low logic level digital circuitry (such as TTL, CMOS, or PMOS/NMOS) and the higher current/voltage requirements of lamps, relays, printer hammers, or other similar loads for a broad range of computer, industrial, and consumer applications. All devices feature open–collector outputs and free-wheeling clamp diodes for transient suppression.
ULN2804 Pinout
ULN2804 Pin Configuration
| Pin No | Pin Name | Description |
|---|---|---|
| 1 | 1B | Input Pin1B |
| 2 | 2B | Input Pin 2B |
| 3 | 3B | Input Pin 3B |
| 4 | 4B | Input Pin 4B |
| 5 | 5B | Input Pin 5B |
| 6 | 6B | Input Pin 6B |
| 7 | 7B | Input Pin 7B |
| 8 | 8B | Input Pin 8B |
| 9 | GND | Ground Pin |
| 10 | COM | Common Pin |
| 11 | 8C | Output Pin 8C |
| 12 | 7C | Output Pin 7C |
| 13 | 6C | Output Pin 6C |
| 14 | 5C | Output Pin 5C |
| 15 | 4C | Output Pin 4C |
| 16 | 3C | Output Pin 3C |
| 17 | 2C | Output Pin 2C |
| 18 | 1C | Output Pin 1C |
The ULN2803 is designed to be compatible with standard TTL families while the ULN2804 is optimized for 6 to 15-volt high-level CMOS or PMOS.
Rating:
- Maximum Collector Emitter Voltage VO=50 V
- Input Voltage VI = 30 V
- Collector Current – Continuous IC = 500 mA
- Base Current – Continuous IB = 25 mA
- Operating Ambient Temperature Range TA = -20 to +85 °C
- Storage Temperature Range Tstg: –55 to +150 °C
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