# CH423NTB

**COSEMITECH** · Magnetic Sensors · TO-92S

CH423NTB 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 with an operating range of 3.3 V to 30 V and an absolute maximum supply voltage of 40 V. |
| 2 | GND | power_in | Ground pin. |
| 3 | OUT | output | Open collector output with a saturation voltage of 0.4 V maximum at 20 mA, an absolute maximum output voltage of 40 V and an absolute maximum output current of 25 mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | COSEMITECH |
| Package | TO-92S |
| 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 | VDD | 3.3 |  | 30 | V | -40 °C to 150 °C | 5 |
| Output saturation voltage | VDSon |  |  | 0.4 | V | at 20mA, Gauss >120 | 5 |
| Output leakage current | IOFF |  |  | 10 | uA | B<-120GS | 5 |
| Output rise time | TR |  |  | 1.5 | uS | VDD =12V at 25 °C CL= 20 pF | 5 |
| Output fall time | TF |  |  | 1.5 | uS | VDD =12V at 25 °C CL= 20 pF | 5 |
| Supply current | IDD |  | 3.5 | 8 | mA | VDD = 5V | 5 |
| CH423N magnetic operating point | BOP | -36 | -18 | -5 | Gauss | TA=25oC | 5 |
| CH423N magnetic release point | BRP | 5 | 18 | 36 | Gauss | TA=25oC | 5 |
| CH423N magnetic hysteresis window | BHYST | 16 | 36 | 56 | Gauss | TA=25oC; /BOP-BRP/ | 5 |
| Maximum switching frequency | FSW |  |  | 100 | KHz |  | 5 |
| Operating temperature | T | -40 |  | 150 | °C |  | 5 |
| Storage temperature | TS | -40 |  | 150 | °C |  | 5 |
| Supply voltage (absolute maximum) | VDD |  |  | 40 | V |  | 3 |
| VDD reverse voltage | VRDD |  |  | -40 | V |  | 3 |
| Supply current (absolute maximum) | IDD |  |  | 20 | mA |  | 3 |
| Output voltage | VOUT | -0.3 |  | 40 | V |  | 3 |
| Output current | IOUT |  |  | 25 | mA |  | 3 |
| Operating ambient temperature | TA | -40 |  | 150 | °C |  | 3 |
| Storage temperature (absolute maximum) | TS | -50 |  | 150 | °C |  | 3 |
| Junction temperature | TJ | -50 |  | 165 | °C |  | 3 |
| ESD HBM, all pins |  | -4000 |  | 4000 | V | HBM, 100pF, 1.5 kohm, MIL-STD-883H Method 3015.8 | 4 |
| ESD MM, all pins |  | -200 |  | 200 | V | MM, C=200pF, R=0 ohm, JEDEC EIA/JESD22-A115 | 4 |
| ESD CDM, all pins |  | -750 |  | 750 | V | CDM, JEDEC EIA/JESD22-C101F | 4 |
| Thermal resistance, junction to ambient (TO-92S, CH423T/CH423NT) | RTH |  | 203 |  | °C/W |  | 5 |

## CAD (KiCad official)

- Symbol: `CH423NTB`
- Footprint: `Package_TO_SOT_THT:TO-92_Inline`
- 3D model: TO-92S (KiCad packages3D, STEP)
- 3D model files: `ch423ntb-etched.step` / `ch423ntb-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ch423ntb.step` / `ch423ntb.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [COSEMITECH datasheet](docs/ch423ntb-datasheet.pdf) (10 pp, sha256 `9625e03b09468429`, retrieved 2026-11-05, 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](docs/ch423ntb-datasheet.pdf)