SM16703P from Shenzhen Sunmoon Micro, 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 sink output for the RED LED channel. Connect LED cathode here with LED anode tied to VDD.
2	VDD	power_in	Positive supply rail, typically 3.7 V to 5.5 V. Decouple locally with a ceramic capacitor near the pin.
3	GND	power_in	Ground reference for the supply, logic, and LED constant-current sinks.
4	DIN	input	Single-wire serial data input. Receives the 24-bit RGB frame for this pixel and forwards the remainder to DO.
5	SET	input	Constant-current programming pin. External resistor to GND sets the per-channel LED sink current.
6	DO	output	Single-wire serial data output. Drives the DIN of the next cascaded pixel with the reshaped remaining bitstream.
7	OUTB	output	Constant-current sink output for the BLUE LED channel.
8	OUTG	output	Constant-current sink output for the GREEN LED channel.

Key specifications

Parameter	Value
Manufacturer	Shenzhen Sunmoon Micro
Package	SOP-8
Category	LED-drv
Pins	8

CAD (KiCad official)

Symbol: SM16703P
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
`sm16703p.step`	122 KB	You want the bare part, or you mark your own boards.
`sm16703p-etched.step`	1.9 MB	You want the part with `SM16703P` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 467 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: Shenzhen Sunmoon Micro datasheet (7 pp, sha256 5b15f0e6fd1d0c75, 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