# DX3319EA

**Dersem** · LED Drivers · ESOP-8

DX3319EA from Dersem, in a ESOP-8. 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 | TRAIC | passive | TRIAC dimmer control port that sinks a bleeder current of 5-50 mA, set by external components, with an absolute maximum voltage of -0.5 to 8 V. |
| 2 | NC | unconnected | No-connect (floating) pin; leave unconnected. |
| 3 | REXT2 | passive | Holding-current setting pin for the TRIAC port, with REXT2 voltage of 0.28-0.34 V (0.31 V typ) and an absolute maximum of -0.5 to 8 V. |
| 4 | REXT1 | passive | Output-current setting pin for the OUT port via an external resistor Rext1 (datasheet recommends Rext1 ≥ 3.9R), with REXT1 voltage of 1.16-1.29 V (1.2 V typ) and an absolute maximum of -0.5 to 8 V. |
| 5 | OUT | output | Constant-current LED output with an absolute maximum voltage of -0.5 to 500 V and output current of 5-300 mA. |
| 6 | NC | unconnected | No-connect (floating) pin; leave unconnected. |
| 7 | NC | unconnected | No-connect (floating) pin; leave unconnected. |
| 8 | VIN | power_in | Supply input with an absolute maximum voltage of -0.5 to 500 V and a 500 V minimum breakdown rating. |
| 9 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Dersem |
| Package | ESOP-8 |
| Category | LED Drivers |
| Pins | 9 |

## CAD (KiCad official)

- Symbol: `DX3319EA`
- Footprint: `Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm`
- 3D model: ESOP-8 (KiCad packages3D, STEP)
- 3D model files: `dx3319ea-etched.step` / `dx3319ea-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `dx3319ea.step` / `dx3319ea.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Dersem datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603378648242679808) (9 pp, sha256 `ffb29cbaa63c1b26`, retrieved 2026-10-09, 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:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-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/dx3319ea-datasheet.pdf)