Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity

3D Model

Open in new tab ↗

Loads when you scroll to it. Unloads after 5 minutes in the background.

Symbol & Footprint

Schematic Symbol

Open full view ↗

Loads when you scroll to it. Unloads after 5 minutes in the background.

PCB Footprint

Open full view ↗

Loads when you scroll to it. Unloads after 5 minutes in the background.

Datasheet

Open in new tab ↗

Loads when you scroll to it. Unloads after 5 minutes in the background.

Download PDF

Contents

Pinout
Key specifications
Electrical characteristics
Materials and finish
CAD (KiCad official)
Provenance

README

markdown

CHI931TB

COSEMITECH · Hall Switches · TO-92S

CHI931TB from COSEMITECH, in a TO-92S. 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 on-board regulator allows operation from 2.5 V to 22 V, with absolute maximum supply voltage of 24 V and reverse voltage limit of -22 V.
2	GND	power_in	Ground pin; the device is protected when the VDD and GND pins are reversed, up to -22 V.
3	OUT	output	Open-drain (open-collector) NMOS output that is short-circuit protected and rated to sink up to 25 mA, with output voltage limits of -0.3 V to 24 V and a pull-up resistor R1 greater than 500 Ω required.

Key specifications

Parameter	Value
Manufacturer	COSEMITECH
Package	TO-92S
Category	Magnetic 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	VDD	2.5		22	V	-40 °C to 150 °C	6
Supply current	IDD		1.6	3	mA	VDD = 3.3V	6
Magnetic operating point (BOP), CHI931	BOP	15	30	55	Gauss	TA=-40oC to 150oC; printed as ±15 / ±30 / ±55	6
Magnetic release point (BRP), CHI931	BRP	5	20	45	Gauss	TA=-40oC to 150oC; printed as ±5 / ±20 / ±45	6
Magnetic hysteresis window /BOP/-/BRP/, CHI931	BHYST	4	10	30	Gauss	TA=-40oC to 150oC	6
Power-on time	tPO			30	μs	TA = 25°C; CLOAD = 10 pF	6
Output saturation voltage	VDSon			0.4	V	at 20mA, Gauss >BOP	6
Output leakage current	IOFF			10	uA	VOUT = 24 V; Switch state = Off	6
Output current limit	IOUT(lim)	30		90	mA	Short-Circuit Protection	6
Output rise time	TR		0.2	2	uS	RLOAD = 820 Ω, CLOAD = 10 pF	6
Output fall time	TF		0.1	2	uS	RLOAD = 820Ω, CLOAD = 10 pF	6
Operating temperature	T	-40		150	°C		6
Storage temperature	TS	-40		150	°C		6
Supply voltage	VDD			24	V		4
VDD reverse voltage	VRDD	-22			V		4
Supply current	IDD			20	mA		4
Output voltage	VOUT	-0.3		24	V		4
Output current	IOUT			25	mA		4
Operating ambient temperature	TA	-40		150	°C		4
Storage temperature	TS	-50		150	°C		4
Junction temperature	TJ	-50		165	°C		4
Thermal resistance, TO-92S package	RTH		203		°C/W		6

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	and SOT-89. Each package type is lead (Pb) free (suffix, -T), with a 100% matte-tin-plated lead-frame. Cosemitech CHA93X/CHI93X	1

CAD (KiCad official)

Symbol: CHI931TB
Footprint: Package_TO_SOT_THT:TO-92_Inline
3D model: TO-92S (KiCad packages3D, STEP)
3D model files: chi931tb-etched.step / chi931tb-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); chi931tb.step / chi931tb.glb are the bare package body.

Provenance

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

Datasheet: COSEMITECH datasheet (14 pp, sha256 c8fb3ca7240e72e8, retrieved 2026-10-18, 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