Texas Instruments
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Seven Darlington sinks with flyback diodes, 500mA each. Relays, solenoids and the 28BYJ-48 stepper. Sinks only — the load goes to the positive rail.
| Part number | ULN2003 |
|---|---|
| Manufacturer | Texas Instruments |
| Category | Integrated Circuits › Gate Drivers |
| Package | DIP-16 |
| Pins | 16 |
| Current | 500 mA |
ULN2003 pinout
| Pin | Name | Type | Description |
|---|---|---|---|
| 1 | IN1 | input | Input 1 |
| 2 | IN2 | input | Input 2 |
| 3 | IN3 | input | Input 3 |
| 4 | IN4 | input | Input 4 |
| 5 | IN5 | input | Input 5 |
| 6 | IN6 | input | Input 6 |
| 7 | IN7 | input | Input 7 |
| 8 | GND | ground | Ground |
| 9 | COM | power | Flyback diode common — tie to the load supply |
| 10 | OUT7 | oc | Output 7, open collector |
| 11 | OUT6 | oc | Output 6 |
| 12 | OUT5 | oc | Output 5 |
| 13 | OUT4 | oc | Output 4 |
| 14 | OUT3 | oc | Output 3 |
| 15 | OUT2 | oc | Output 2 |
| 16 | OUT1 | oc | Output 1 |
Schematic symbol and footprint
Schematic symbol
Footprint: DIP-16 — to scale, pad 1 in yellow (mm). Check against the datasheet before ordering PCBs.