# ULN2003AM

**HGSEMI** · Darlington Transistor Arrays · SOP-16

ULN2003AM from HGSEMI, in a SOP-16. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | 1B | input | Base input to Darlington pair 1. TTL/CMOS compatible logic input; drives corresponding open-collector output 1C through internal ~2.7 kΩ base resistor. |
| 2 | 2B | input | Base input to Darlington pair 2. TTL/CMOS compatible logic input; drives output 2C. |
| 3 | 3B | input | Base input to Darlington pair 3. TTL/CMOS compatible logic input; drives output 3C. |
| 4 | 4B | input | Base input to Darlington pair 4. TTL/CMOS compatible logic input; drives output 4C. |
| 5 | 5B | input | Base input to Darlington pair 5. TTL/CMOS compatible logic input; drives output 5C. |
| 6 | 6B | input | Base input to Darlington pair 6. TTL/CMOS compatible logic input; drives output 6C. |
| 7 | 7B | input | Base input to Darlington pair 7. TTL/CMOS compatible logic input; drives output 7C. |
| 8 | GND | power_in | Common ground/emitter return for all seven Darlington pairs. Connect to system ground. |
| 9 | COM | power_in | Common cathode for the internal freewheeling suppression diodes. Connect to the positive supply of the inductive load (up to 50 V) to clamp back-EMF when switching relays, solenoids, or motors. |
| 10 | 7C | output | Open-collector Darlington output 7. Sinks up to 500 mA to GND when input 7B is high; VCE(sat) ≈ 1.1 V @ 200 mA. Withstands up to 50 V off-state. |
| 11 | 6C | output | Open-collector Darlington output 6. Sinks up to 500 mA to GND when input 6B is high; withstands up to 50 V off-state. |
| 12 | 5C | output | Open-collector Darlington output 5. Sinks up to 500 mA to GND when input 5B is high; withstands up to 50 V off-state. |
| 13 | 4C | output | Open-collector Darlington output 4. Sinks up to 500 mA to GND when input 4B is high; withstands up to 50 V off-state. |
| 14 | 3C | output | Open-collector Darlington output 3. Sinks up to 500 mA to GND when input 3B is high; withstands up to 50 V off-state. |
| 15 | 2C | output | Open-collector Darlington output 2. Sinks up to 500 mA to GND when input 2B is high; withstands up to 50 V off-state. |
| 16 | 1C | output | Open-collector Darlington output 1. Sinks up to 500 mA to GND when input 1B is high; withstands up to 50 V off-state. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HGSEMI |
| Package | SOP-16 |
| Category | Transistors/Thyristors |
| Pins | 16 |

## Ordering variants

Same part, different packaging or reel option.

- `ULN2003AMS16`
- `ULN2003AMN`
- `ULN2003AMTS16`

## CAD (KiCad official)

- Symbol: `ULN2003AM`
- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`
- 3D model: SOP-16 (KiCad packages3D, STEP)
- 3D model files: `uln2003am-etched.step` / `uln2003am-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `uln2003am.step` / `uln2003am.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [HGSEMI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8758075146018275328) (10 pp, sha256 `995b5bd619cd84d5`, retrieved 2026-08-17, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/uln2003am-datasheet.pdf)