TM512AC from TM Shenzhen Titan Micro Elec, in a SOP-16. 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	GND	power_in	Power supply negative / ground reference (0 V). All internal logic and current-sink outputs reference this pin.
2	OUTR	output	Constant-current PWM output for the Red LED channel. 16-bit / 65536-level grayscale open-drain sink; withstand voltage >30 V, programmable current up to 80 mA (set by REXT).
3	OUTG	output	Constant-current PWM output for the Green LED channel. 16-bit grayscale open-drain sink; withstand voltage >30 V, current programmed via REXT (max 80 mA).
4	OUTB	output	Constant-current PWM output for the Blue LED channel. 16-bit grayscale open-drain sink; withstand voltage >30 V, current programmed via REXT (max 80 mA).
5	OUTW	output	Constant-current PWM output for the White LED channel. 16-bit grayscale open-drain sink; withstand voltage >30 V, current programmed via REXT (max 80 mA).
6	REXT	passive	Constant-current feedback / reference. Connect an external resistor to GND to program the OUTR/G/B/W sink current. Iout = 48/(400+Rext); e.g. 2266.67 Ω → 18 mA, 400 Ω → 60 mA. Max Iout 80 mA.
7	ADRO	output	Address-write daisy-chain OUTPUT. During address programming this pin cascades to the ADRI of the next IC on the chain. Push-pull; Iol/Ioh ≥ 10 mA.
8	SET	input	Power-on RGBW state setting pin. Leave floating → OUTB drives 5% grayscale on power-up; tie to VDD → all channels off. Configures the default startup output pattern.
9	NC	unconnected	No connection. Leave floating.
10	ADRI	input	Address-write daisy-chain INPUT with internal pull-up. Receives the address-programming signal from the previous IC's ADRO (or from the programmer for the first IC).
11	AI	input	Positive (non-inverting) input of the differential DMX512 receiver. Internal pull-up. Input common-mode range up to 8 V; differential threshold ±0.2 V; input impedance ~280 kΩ.
12	BI	input	Negative (inverting) input of the differential DMX512 receiver. Internal pull-down. Pair with AI for RS-485-style DMX512 signaling at 200 kbps-1 Mbps.
13	PWM	input	Output-polarity select. Leave floating for normal polarity; tie to VDD to invert output polarity (also lowers refresh rate to 250 Hz). Used when driving PNP/PMOS boost stages for high-current channels.
14	NC	unconnected	No connection. Leave floating.
15	NC	unconnected	No connection. Leave floating.
16	VDD	power_in	Logic supply positive. Recommended 3.8-6 V (typ 5.5 V, abs-max +6.5 V). Datasheet notes an internal 5 V regulator/clamp diode; decouple to GND with a bulk + 0.1 µF ceramic.

Key specifications

Parameter	Value
Manufacturer	TM Shenzhen Titan Micro Elec
Package	SOP-16
Category	LED-drv
Pins	16

CAD (KiCad official)

Symbol: TM512AC
Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
3D model: SOP-16 (KiCad packages3D, STEP)

Provenance

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

Datasheet: TM Shenzhen Titan Micro Elec datasheet (15 pp, sha256 9e9996241f85e4d0, 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