WS2811C from Worldsemi, in a SOP-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	Constant-current PWM sink output for the RED LED channel. Low-side open-drain type driver rated up to 20 V withstand, typical IOL = 32 mA (30-36 mA).
2	OUTG	output	Constant-current PWM sink output for the GREEN LED channel. Low-side open-drain type driver rated up to 20 V withstand, typical IOL = 32 mA (30-36 mA).
3	OUTB	output	Constant-current PWM sink output for the BLUE LED channel. Low-side open-drain type driver rated up to 20 V withstand, typical IOL = 32 mA (30-36 mA).
4	GND	power_in	Common ground reference for data and power (VSS = 0 V).
5	DO	output	Reshaped single-wire cascade data output to the next driver's DIN. Drives >=10 mA at Vo=0.4 V; transmission delay <=300 ns (CL=15 pF, RL=10 kOhm).
6	DIN	input	Single-wire NZR control-data input from the upstream controller or previous cascade IC. Logic thresholds VIH >= 0.7VDD, VIL <= 0.3VDD, hysteresis ~0.35 V; withstand voltage 9.5 V.
7	NC	unconnected	No internal connection. Leave floating or tie to a copper pour as convenient; no functional purpose.
8	VDD	power_in	IC power supply, +3.5 V to +5.5 V operating (typ 5 V). When the LED rail is 12 V or 24 V a series dropper resistor is used with the internal Zener regulator to hold VDD in range.

Key specifications

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

CAD (KiCad official)

Symbol: WS2811C
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOP-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`ws2811c.step`	122 KB	You want the bare part, or you mark your own boards.
`ws2811c-etched.step`	1.7 MB	You want the part with `WS2811C` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 422 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 (7 pp, sha256 f35504c08de5d983, retrieved 2026-08-17, tier: lcsc)
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