TM1804 from TM Shenzhen Titan Micro Elec, 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	Red channel PWM-controlled open-drain LED driver output. Sinks up to 40-45 mA (Iolc at Vout=0.5V), Ron ≈ 13Ω, port withstands up to 30V. 256-level PWM brightness control.
2	OUTG	output	Green channel PWM-controlled open-drain LED driver output. Sinks up to 40-45 mA (Iolc at Vout=0.5V), Ron ≈ 13Ω, port withstands up to 30V. 256-level PWM brightness control.
3	OUTB	output	Blue channel PWM-controlled open-drain LED driver output. Sinks up to 40-45 mA (Iolc at Vout=0.5V), Ron ≈ 13Ω, port withstands up to 30V. 256-level PWM brightness control.
4	GND	power_in	System ground reference. All voltages measured with respect to this pin.
5	DO	output	Cascaded serial data output. Forwards reshaped data to the next TM1804 in a chain. Recommend 100~200Ω series isolation resistor to protect against downstream chip failures.
6	DIN	input	Serial data input. Single-wire NRZ-encoded 24-bit RGB data (MSB first, R->G->B). Vih ≥ 3.8V, Vil ≤ 1.5V. Input capacitance ~15 pF.
7	SET	input	Speed mode select. Tie to VDD for low-speed mode (400 Kbps); leave floating for high-speed mode (800 Kbps).
8	VDD	power_in	Logic supply, DC 5V ±10% (recommended 4.5-6.5V; abs max 7.0V). Internal 5V zener regulator allows 6~24V supply through an external series resistor (330Ω @6V, 1.2K @9V, 2.4K @12V, 6.8K @24V). Typical Idd ≈ 3 mA.

Key specifications

Parameter	Value
Manufacturer	TM Shenzhen Titan Micro Elec
Package	SOP-8
Category	LED-drv
Pins	8

CAD (KiCad official)

Symbol: TM1804
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
`tm1804.step`	122 KB	You want the bare part, or you mark your own boards.
`tm1804-etched.step`	1.4 MB	You want the part with `TM1804` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 360 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: TM Shenzhen Titan Micro Elec datasheet (9 pp, sha256 7ed0e6fb8e61a950, 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