# WS2812B-B

**Worldsemi** · RGB LEDs(Built-In IC) · SMD5050-4P

WS2812B-B from Worldsemi, in a SMD5050-4P. 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.


::adom-states{src="/adom/ws2812b-b/render/states.json"}

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VDD | power_in | Power supply input for the LED and control circuit; the datasheet's absolute maximum power supply voltage range is +3.7~+5.3 V. |
| 2 | DOUT | output | Control data signal output that sends the reshaped data from DIN to the next cascaded pixel. |
| 3 | VSS | power_in | Ground for data and power; the datasheet specifies VSS = 0 V as the reference. |
| 4 | DIN | input | Control data signal input; the datasheet gives VIH min 2.7 V and VIL max 0.7 V, with logic input voltage limits of VDD-0.3 V to VDD+0.7 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Worldsemi |
| Package | SMD5050-4P |
| Category | Optoelectronics |
| Pins | 4 |

## CAD (KiCad official)

- Symbol: `WS2812B-B`
- Footprint: `LED_SMD:LED_WS2812B_PLCC4_5.0x5.0mm_P3.2mm`
- 3D model: SMD5050-4P (KiCad packages3D, STEP)
- 3D model files: `ws2812b-b-etched.step` / `ws2812b-b-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ws2812b-b.step` / `ws2812b-b.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Worldsemi datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588893982302875648) (8 pp, sha256 `70b853f11ea50ddd`, retrieved 2026-10-07, tier: lcsc)
- **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/ws2812b-b-datasheet.pdf)