HG810RM3 from HGSEMI, in a SOT-23-3. 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	Ground reference for the chip. Connect to system ground.
2	RESET	output	Active-low reset output. Drives low when VCC falls below the detection threshold (2.63 V typ for -RM3); released high (push-pull) ~500 ms after VCC returns above threshold. VOL <= 0.3 V at ISINK = 1.2 mA; VOH >= 0.8*VCC at ISOURCE = 150 uA (for 1.8 V < VCC < Vthmin).
3	VCC	power_in	Supply / monitored input voltage. Operating range 1.0-6.0 V (absolute max 6.5 V). Also the voltage being sensed against the internal threshold.

Key specifications

Parameter	Value
Manufacturer	HGSEMI
Package	SOT-23-3
Category	PMIC
Pins	3

Ordering variants

Same part, different packaging or reel option.

HG810RM3/TR

CAD (KiCad official)

Symbol: HG810RM3
Footprint: Package_TO_SOT_SMD:SOT-23-3
3D model: SOT-23-3 (KiCad packages3D, STEP)

Provenance

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

Datasheet: HGSEMI datasheet (6 pp, sha256 617dd8734b6693f4, 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