# ULQ2004A

**STMicroelectronics** · Darlington Transistor Arrays · DIP-16

ULQ2004A from STMicroelectronics, in a DIP-16. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | IN 1 | input | Darlington driver 1 input, for ULQ2004 intended for 6-15 V CMOS/PMOS logic with absolute maximum input voltage of 30 V. |
| 2 | IN 2 | input | Darlington driver 2 input, for ULQ2004 intended for 6-15 V CMOS/PMOS logic with absolute maximum input voltage of 30 V. |
| 3 | IN 3 | input | Darlington driver 3 input, for ULQ2004 intended for 6-15 V CMOS/PMOS logic with absolute maximum input voltage of 30 V. |
| 4 | IN 4 | input | Darlington driver 4 input, for ULQ2004 intended for 6-15 V CMOS/PMOS logic with absolute maximum input voltage of 30 V. |
| 5 | IN 5 | input | Darlington driver 5 input, for ULQ2004 intended for 6-15 V CMOS/PMOS logic with absolute maximum input voltage of 30 V. |
| 6 | IN 6 | input | Darlington driver 6 input, for ULQ2004 intended for 6-15 V CMOS/PMOS logic with absolute maximum input voltage of 30 V. |
| 7 | IN 7 | input | Darlington driver 7 input, for ULQ2004 intended for 6-15 V CMOS/PMOS logic with absolute maximum input voltage of 30 V. |
| 8 | GND | power_in | Common emitter ground of all seven Darlington drivers, carrying the sink current of the outputs. |
| 9 | COMMON FREE WHEELING DIODES | passive | Common cathode of the seven integrated suppression (free-wheeling) diodes, connected to the positive supply of the inductive load, with clamp diode rated 50 V reverse and IF = 350 mA. |
| 10 | OUT 7 | output | Open-collector Darlington output 7 rated for 50 V and 500 mA continuous (600 mA peak). |
| 11 | OUT 6 | output | Open-collector Darlington output 6 rated for 50 V and 500 mA continuous (600 mA peak). |
| 12 | OUT 5 | output | Open-collector Darlington output 5 rated for 50 V and 500 mA continuous (600 mA peak). |
| 13 | OUT 4 | output | Open-collector Darlington output 4 rated for 50 V and 500 mA continuous (600 mA peak). |
| 14 | OUT 3 | output | Open-collector Darlington output 3 rated for 50 V and 500 mA continuous (600 mA peak). |
| 15 | OUT 2 | output | Open-collector Darlington output 2 rated for 50 V and 500 mA continuous (600 mA peak). |
| 16 | OUT 1 | output | Open-collector Darlington output 1 rated for 50 V and 500 mA continuous (600 mA peak). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | DIP-16 |
| Category | Transistors/Thyristors |
| Pins | 16 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | copper |  | pin plastic DIP packages with a copper lead￾frame to reduce thermal resistance. They are | 1 |

## CAD (KiCad official)

- Symbol: `ULQ2004A`
- Footprint: `Package_DIP:DIP-16_W7.62mm`
- 3D model: DIP-16 (KiCad packages3D, STEP)
- 3D model files: `ulq2004a-etched.step` / `ulq2004a-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ulq2004a.step` / `ulq2004a.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [STMicroelectronics datasheet](https://www.st.com/resource/en/datasheet/ulq2004a.pdf) (14 pp, sha256 `5b76cfd5a2b38468`, retrieved 2026-11-06, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/ulq2004a-datasheet.pdf)