ULN2803A 8-channel Darlington driver IC
Through-hole ULN2803A 8-channel Darlington transistor array in an 18-pin DIP package with open-collector outputs and common clamp-diode pin. Drives relays, solenoids, lamps, and unipolar stepper motor windings.
Pinout
- 1B1Type · Unknown
- 2B2Type · Unknown
- 3B3Type · Unknown
- 4B4Type · Unknown
- 5B5Type · Unknown
- 6B6Type · Unknown
- 7B7Type · Unknown
- 8B8Type · Unknown
- GND9Type · Ground
- COM10Type · Unknown
- 8C11Type · Unknown
- 7C12Type · Unknown
- 6C13Type · Unknown
- 5C14Type · Unknown
- 4C15Type · Unknown
- 3C16Type · Unknown
- 2C17Type · Unknown
- 1C18Type · Unknown
| Pin | Position | Type |
|---|---|---|
| 1B | 1 | Unknown |
| 2B | 2 | Unknown |
| 3B | 3 | Unknown |
| 4B | 4 | Unknown |
| 5B | 5 | Unknown |
| 6B | 6 | Unknown |
| 7B | 7 | Unknown |
| 8B | 8 | Unknown |
| GND | 9 | Ground |
| COM | 10 | Unknown |
| 8C | 11 | Unknown |
| 7C | 12 | Unknown |
| 6C | 13 | Unknown |
| 5C | 14 | Unknown |
| 4C | 15 | Unknown |
| 3C | 16 | Unknown |
| 2C | 17 | Unknown |
| 1C | 18 | Unknown |
Pin details
18 connections- 1B1Unknown
- 2B2Unknown
- 3B3Unknown
- 4B4Unknown
- 5B5Unknown
- 6B6Unknown
- 7B7Unknown
- 8B8Unknown
- GND9Ground
- COM10Unknown
- 8C11Unknown
- 7C12Unknown
- 6C13Unknown
- 5C14Unknown
- 4C15Unknown
- 3C16Unknown
- 2C17Unknown
- 1C18Unknown
Bare ICs
67 other options74HC logic gates, MCP3008/MCP23017 ADCs and expanders, 24LC256 EEPROM, 4N25-series optocouplers and ULN2803A drivers — bare DIP chips with no breakout-board conveniences like pull-ups or level shifting.
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