# CM1224-04MR

**onsemi** · ESD Protection Devices · MSOP-10

CM1224-04MR from onsemi, in a MSOP-10. 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 | CH1 | bidirectional | ESD protection channel 1; the DC voltage at any channel input must stay between (VN − 0.5) V and (VP + 0.5) V, and it is rated for ±8 kV contact discharge per IEC 61000-4-2. |
| 2 | NC | unconnected | No-connect pin, not used in the device. |
| 3 | VP | power_in | Positive voltage supply rail; the operating supply voltage (VP − VN) is 3.3 V to 5.5 V, with an absolute maximum of 6.0 V. |
| 4 | CH2 | bidirectional | ESD protection channel 2; the DC voltage at any channel input must stay between (VN − 0.5) V and (VP + 0.5) V, and it is rated for ±8 kV contact discharge per IEC 61000-4-2. |
| 5 | NC | unconnected | No-connect pin, not used in the device. |
| 6 | CH3 | bidirectional | ESD protection channel 3; the DC voltage at any channel input must stay between (VN − 0.5) V and (VP + 0.5) V, and it is rated for ±8 kV contact discharge per IEC 61000-4-2. |
| 7 | NC | unconnected | No-connect pin, not used in the device. |
| 8 | VN | power_in | Negative voltage supply rail; the supply voltage (VP − VN) must not exceed 6.0 V. |
| 9 | CH4 | bidirectional | ESD protection channel 4; the DC voltage at any channel input must stay between (VN − 0.5) V and (VP + 0.5) V, and it is rated for ±8 kV contact discharge per IEC 61000-4-2. |
| 10 | NC | unconnected | No-connect pin, not used in the device. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | MSOP-10 |
| Category | TVS/Fuse/Board Level Protection |
| Pins | 10 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Operating Supply Voltage (VP − VN) |  |  |  | 6 | V |  | 3 |
| Operating Temperature Range |  | -40 |  | 85 | °C |  | 3 |
| Storage Temperature Range |  | -65 |  | 150 | °C |  | 3 |
| Operating Temperature Range |  | -40 |  | 85 | °C |  | 4 |
| Package Power Rating |  |  |  | 400 | mW | MSOP-10 Package | 4 |
| Operating Supply Voltage (VP−VN) | VP | 3.3 |  | 5.5 | V |  | 4 |
| Operating Supply Current (VP−VN) | IP |  |  | 8 | A | (VP−VN) = 3.3 V | 4 |
| Diode Forward Voltage, Top Diode | VF | 0.6 | 0.8 | 0.95 | V | IF = 8 mA; TA = 25°C | 4 |
| Diode Forward Voltage, Bottom Diode | VF | 0.6 | 0.8 | 0.95 | V | IF = 8 mA; TA = 25°C | 4 |
| Channel Leakage Current | ILEAK |  | 0.1 | 1 | A | TA = 25°C; VP = 5 V, VN = 0 V | 4 |
| Channel Input Capacitance | CIN | 0.6 | 0.7 | 0.8 | pF | At 1 MHz, VP = 3.3 V, VN = 0 V, VIN = 1.65 V | 4 |
| ESD Protection − Peak Discharge Voltage at any channel input (contact discharge per IEC 61000-4-2) | VESD | -8 |  | 8 | kV | TA = 25°C (Notes 2 and 3) | 4 |

## CAD (KiCad official)

- Symbol: `CM1224-04MR`
- Footprint: `Package_SO:MSOP-10_3x3mm_P0.5mm`
- 3D model: MSOP-10 (KiCad packages3D, STEP)

## Provenance

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

- **Datasheet:** [onsemi datasheet](https://www.onsemi.com/pdf/datasheet/cm1224-04mr-d.pdf) (12 pp, sha256 `35f598f47d0913cd`, retrieved 2026-10-31, tier: manufacturer)
- **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/cm1224-04mr-datasheet.pdf)