WS2811M from Worldsemi, in a MSOP-8. 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	OUTR	output	RED channel constant-current PWM LED drive output. Open-drain, 256-level PWM at ~2 kHz. Low-level sink current IOL typ 16.5 mA (15.5-17.5 mA). Output withstands up to 20 V.
2	OUTG	output	GREEN channel constant-current PWM LED drive output. Open-drain, 256-level PWM. Low-level sink current typ 16.5 mA. Output rated to 20 V.
3	OUTB	output	BLUE channel constant-current PWM LED drive output. Open-drain, 256-level PWM. Low-level sink current typ 16.5 mA. Output rated to 20 V.
4	GND	power_in	Common signal and power ground (VSS = 0 V reference).
5	DO	output	Cascaded serial data output. Forwards the reshaped single-wire data stream (minus the first 24 bits consumed by this IC) to the DIN of the next device. Drive capability Idout ≥ 10 mA at VO = 0.4 V.
6	DIN	input	Single-wire serial data input. Accepts NRZ-coded 24-bit RGB data at up to 800 Kbps. VIH ≥ 0.7·VDD, VIL ≤ 0.3·VDD, hysteresis typ 0.35 V. Port withstands up to 9.5 V.
7	NC	unconnected	No connect. Leave floating.
8	VDD	power_in	Logic supply for the IC, 3.5 V to 5.5 V absolute maximum. An internal shunt regulator allows operation from supplies up to ~24 V by inserting a series resistor from the higher rail to VDD (e.g. 3.3 kΩ from a 12 V rail); no external Zener required.

Key specifications

Parameter	Value
Manufacturer	Worldsemi
Package	MSOP-8
Category	LED-drv
Pins	8

CAD (KiCad official)

Symbol: WS2811M
Footprint: Package_SO:MSOP-8_3x3mm_P0.65mm
3D model: MSOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`ws2811m.step`	123 KB	You want the bare part, or you mark your own boards.
`ws2811m-etched.step`	1.6 MB	You want the part with `WS2811M` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 412 faces against 147 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

Datasheet: Worldsemi datasheet (8 pp, sha256 6e9028cd9758beb6, 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