component
CHA442NSR
Public Made by Adomby adom
COSEMITECH Hall Switches, SOT-23-3L. 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
markdownCHA442NSR
COSEMITECH · Hall Switches · SOT-23-3L
CHA442NSR 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 absolute maximum of 24 V with a reverse-voltage limit of -22 V, and the operating supply range is 2.5 V to 22 V. |
| 2 | OUT | output | Open-drain NMOS output (datasheet calls it open collector) that is short-circuit protected and rated to sink up to 25 mA, with an output voltage absolute maximum of 24 V; the pull-up resistor R1 should be greater than 500 Ω. |
| 3 | GND | power_in | Ground pin; the device is protected if VCC and GND are reversed, up to -22 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | COSEMITECH |
| Package | SOT-23-3L |
| 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 | |
| Lowest supply voltage | VCCL | 2 | V | -40 °C to 150 °C | 7 | ||
| Supply current | IDD | 1.6 | 3 | mA | VDD = 2.5V to 22V | 7 | |
| Supply Zener clamp voltage | VZSUPPLY | 24 | V | ICC =7 mA; TA = 25°C | 7 | ||
| Output Zener clamp voltage | VZOUT | 24 | V | IOUT = 3mA | 7 | ||
| Reverse battery Zener voltage | VRCC | -22 | V | 7 | |||
| Reverse battery current | IRCC | -5 | mA | VCC = -22 V | 7 | ||
| Power-on time | tPO | 30 | μs | TA = 25°C; CLOAD = 10 pF | 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 | |
| Output delay time | Td | 13 | 25 | μs | B=Brp-100G to Bop+100G in 1us | 7 | |
| Maximum switching frequency | FSW | 20 | 30 | KHz | 7 | ||
| Operating temperature | T | -40 | 150 | °C | 7 | ||
| Storage temperature | TS | -40 | 150 | °C | 7 | ||
| Magnetic operating point | BOP | -50 | -30 | -10 | Gauss | TA=-40oC to 150oC | 8 |
| Magnetic release point | BRP | 10 | 30 | 50 | Gauss | TA=-40oC to 150oC | 8 |
| Magnetic hysteresis window | BHYST | 35 | 60 | 85 | Gauss | /BOP-BRP/ TA=-40oC to 150oC | 8 |
| Magnetic offset | Bo | -15 | 0 | 15 | Gauss | BO = (BOP + BRP) / 2 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 | ||
| ESD HBM (all pins) | -8000 | 8000 | V | HBM per AEC-Q100-002 | 5 | ||
| ESD MM (all pins) | -200 | 200 | V | MM per AEC-Q100-003 | 5 | ||
| ESD CDM (all pins) | -750 | 750 | V | CDM per AEC-Q100-011 | 5 | ||
| Thermal resistance, junction to ambient | RTH | 303 | °C /W | SOT-23-3L package | 7 | ||
| Chopping frequency | FC | 500 | KHz | 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:
CHA442NSR - Footprint:
Package_TO_SOT_SMD:SOT-23-3 - 3D model: SOT-23-3L (KiCad packages3D, STEP)
- 3D model files:
cha442nsr-etched.step/cha442nsr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);cha442nsr.step/cha442nsr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: COSEMITECH datasheet (15 pp, sha256
bb180a03995d8124, retrieved 2026-10-19, 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).