CH912SR from COSEMITECH, in a SOT-23-3L. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	VDD	power_in	Supply voltage pin; the datasheet gives an operating supply range of 1.8 V to 5.25 V and an absolute maximum supply voltage of 6 V.
2	OUT	output	Push-pull output pin that goes low when the field exceeds BOP and high when it falls below BRP, rated for 1 mA output current ability with an absolute maximum output current of 3 mA.
3	GND	power_in	Ground pin.

Key specifications

Parameter	Value
Manufacturer	COSEMITECH
Package	SOT-23-3L
Category	Sensors
Pins	3

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
Supply Voltage (operating)	VCC	1.8		5.25	V	Operating, TJ < 165°C	5
Supply Current, awake (CH912)	ICC(awake)		1.1	1.6	mA	During awake period, TA = 25°C, VCC=3.3V	5
Output low voltage (on)	VOL		0.1	0.2	V	IOUT = 1 mA	5
Awake time (CH912)	Tawake		40	75	us	Note 3	5
Period (CH912)	Tperiod		50	100	ms	Note 3	5
Output leakage current	IOFF			1	μA	VOUT = 5.25V; Switch state = Off	5
Operate point	Bop	20	33	75	Gauss	VDD = 1.8V to 5.25V, TA = 25°C; datasheet prints ±20 / ±33 / ±75	5
Release point	Brp	10	23	65	Gauss	VDD = 1.8V to 5.25V, TA = 25°C; datasheet prints ±10 / ±23 / ±65	5
Supply Voltage	VDD			6	V		3
VDD Reverse Voltage	VRDD	-0.3			V		3
Supply Current	IDD			3	mA		3
Output Voltage	VOUT	-0.3			V	Max printed as VDD+0.3	3
Output Current	IOUT			3	mA		3
Operating Ambient Temperature	TA	-40		150	°C		3
Storage Temperature	TS	-50		150	°C		3
Junction temperature	TJ	-50		165	°C		3
ESD HBM (all pins)		-8000		8000	V	HBM, AEC-Q100-002; printed +/-8000	4
ESD MM (all pins)		-400		400	V	MM, AEC-Q100-003; printed +/-400	4
ESD CDM (all pins)		-1500		1500	V	CDM, AEC-Q100-011; printed +/-1500	4

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part	Material	Colour / plating	Datasheet says	Page
contacts		tin	Two package styles provide a magnetically optimized package for most applications, SOT-23 and TO92S. Each package type is lead (Pb) free (suffix, -T), with a 100% matte-tin-plated leadframe. Cosemite	1

CAD (KiCad official)

Symbol: CH912SR
Footprint: Package_TO_SOT_SMD:SOT-23-3
3D model: SOT-23-3L (KiCad packages3D, STEP)
3D model files: ch912sr-etched.step / ch912sr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ch912sr.step / ch912sr.glb are the bare package body.

Provenance

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

Datasheet: COSEMITECH datasheet (9 pp, sha256 fbe38179f056cfee, retrieved 2026-11-04, tier: lcsc)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF

CH912SR

Verified CH912SR

Verification log 1 record

3D Model

Symbol & Footprint

Schematic Symbol

PCB Footprint

Datasheet

README