component
CH444TB
Public Made by Adomby adom
COSEMITECH Hall Switches, TO-92S. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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Contents
README
markdownCH444TB
COSEMITECH · Hall Switches · TO-92S
CH444TB 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, specified for a 2.5 V to 22 V operating range, with an absolute maximum supply voltage of 24 V and a reverse voltage rating of -22 V. |
| 2 | GND | power_in | Ground pin; the device is protected in the event that the VCC pin and the GND pin are reversed, up to -22 V. |
| 3 | OUT | output | Open-collector output pin with an output voltage limit of -0.3 V to 24 V and an absolute maximum output current of 25 mA. |
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 | VCC | 2.5 | 22 | V | -40 °C to 150 °C | 7 | |
| Supply Current | IDD | 1.6 | 3 | mA | VDD = 2.5V to 22V | 7 | |
| Output saturation voltage | VDSon | 0.4 | V | at 20mA, Gauss >BOP | 7 | ||
| Output Leakage Current | IOFF | 10 | uA | VOUT = 24 V; Switch state = Off | 7 | ||
| Output Current Limit | IOUT(lim) | 30 | 90 | mA | Short-Circuit Protection | 7 | |
| Output rise time | TR | 0.2 | 2 | uS | RLOAD = 820 Ω, CLOAD = 10 pF | 7 | |
| Output fall time | TF | 0.1 | 2 | uS | RLOAD = 820Ω, CLOAD = 10 pF | 7 | |
| Power-On Time | tPO | 30 | μs | TA = 25°C; CLOAD = 10 pF | 7 | ||
| Operating temperature | T | -40 | 150 | °C | 7 | ||
| Storage temperature | TS | -40 | 150 | °C | 7 | ||
| Magnetic operating point | BOP | 70 | 120 | 180 | Gauss | TA=-40oC to 150oC | 8 |
| Magnetic release point | BRP | -180 | -120 | -70 | Gauss | TA=-40oC to 150oC | 8 |
| Magnetic hysteresis window /BOP-BRP/ | BHYST | 180 | 240 | 300 | Gauss | TA=-40oC to 150oC | 8 |
| Magnetic offset; BO = (BOP + BRP) / 2 | Bo | -30 | 0 | 30 | Gauss | TA=-40oC to 150oC | 8 |
| Supply Voltage | VDD | 24 | V | 5 | |||
| VDD Reverse Voltage | VRDD | -22 | V | 5 | |||
| Supply Current | IDD | 20 | mA | 5 | |||
| Output Voltage | VOUT | -0.3 | 24 | V | 5 | ||
| Output Current | IOUT | 25 | mA | 5 | |||
| Operating Ambient Temperature | TA | -40 | 150 | °C | 5 | ||
| Storage Temperature | TS | -55 | 165 | °C | 5 | ||
| Junction temperature | TJ | -55 | 165 | °C | 5 | ||
| Thermal resistance | RTH | 203 | °C/W | TO-92S | 7 |
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 CHA44X/CH44X | 1 |
CAD (KiCad official)
- Symbol:
CH444TB - Footprint:
Package_TO_SOT_THT:TO-92_Inline - 3D model: TO-92S (KiCad packages3D, STEP)
- 3D model files:
ch444tb-etched.step/ch444tb-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ch444tb.step/ch444tb.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: COSEMITECH datasheet (15 pp, sha256
bb180a03995d8124, retrieved 2026-10-20, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).