# NCT75MNR2G

**onsemi** · Temperature Sensors · DFN-8-EP(2x2)

NCT75MNR2G from onsemi, in a DFN-8-EP(2x2). 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 | SDA | bidirectional | SMBus/I2C serial bidirectional data input/output; open-drain pin that needs a pull-up resistor. |
| 2 | SCL | input | Serial clock input; open-drain pin that needs a pull-up resistor. |
| 3 | OS/ALERT | output | Over-temperature indicator; open-drain active-low output by default that needs a pull-up resistor. |
| 4 | GND | power_in | Power supply ground. |
| 5 | A2 | input | SMBus/I2C address selection pin; connect to GND or VDD to set the desired I2C address. |
| 6 | A1 | input | SMBus/I2C address selection pin; connect to GND or VDD to set the desired I2C address. |
| 7 | A0 | input | SMBus/I2C address selection pin; connect to GND or VDD to set the desired I2C address. |
| 8 | VDD | power_in | Positive supply voltage, 3.0 V to 5.5 V; bypass to ground with a 0.1 µF capacitor. |
| 9 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | onsemi |
| Package | DFN-8-EP(2x2) |
| Category | Sensors |
| Pins | 9 |

## 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 | -0.3 |  | 7 | V |  | 3 |
| Input Voltage on SCL, SDA, A2, A1, A0 and OS/ALERT |  | -0.3 |  |  | V |  | 3 |
| Input Current on SDA, A2, A1, A0 and OS/ALERT | IIN | -1 |  | 50 | mA |  | 3 |
| Maximum Junction Temperature | TJ(max) |  |  | 150.7 | °C |  | 3 |
| Storage Temperature Range | TSTG | -65 |  | 160 | °C |  | 3 |
| Operating Temperature Range | TOP | -55 |  | 125 | °C |  | 3 |
| ESD Capability, Human Body Model | ESDHBM |  |  | 2000 | V | Human Body Model (Note 1) | 3 |
| ESD Capability, Machine Model | ESDMM |  |  | 400 | V | Machine Model (Note 1) | 3 |
| Operating Supply Voltage | VIN | 3 |  | 5.5 | V |  | 3 |
| Operating Ambient Temperature Range | TA | -55 |  | 125 | °C |  | 3 |
| Serial Clock Frequency | fSCL |  |  | 400 | kHz |  | 3 |
| Start Condition Hold Time | tHD:STA | 0.6 |  |  | s |  | 3 |
| Stop Condition Setup Time | tSU:STO | 100 |  |  | ns | 90% of SCL to 10% of SDA | 3 |
| Clock Low Period | tLOW | 1.3 |  |  | s |  | 3 |
| Clock High Period | tHIGH | 0.6 |  |  | s |  | 3 |
| Start Condition Setup Time | tSU:STA | 100 |  |  | ns | 90% of SCL to 90% of SDA | 3 |
| Data Setup Time | tSU:DAT | 100 |  |  | ns | 10% of SDA to 10% of SCL | 3 |
| Data Hold Time | tHD:DAT | 0 |  | 76 | ns | 10% of SCL to 10% of SDA | 3 |
| Bus Free Time Between STOP and START Conditions | tBUF | 1.3 |  |  | s |  | 3 |
| Accuracy at VDD = 3.0 V to 5.5 V, TA = 0°C to +70°C |  | -1 |  | 1 | °C | Accuracy at VDD = 3.0 V to 5.5 V; TA = 0°C to +70°C | 4 |
| Accuracy at VDD = 3.0 V to 5.5 V, TA = −25°C to +100°C |  | -2 |  | 2 | °C | Accuracy at VDD = 3.0 V to 5.5 V; TA = −25°C to +100°C | 4 |
| Accuracy at VDD = 3.0 V to 5.5 V, TA = −55°C to +125°C |  | -3 |  | 3 | °C | Accuracy at VDD = 3.0 V to 5.5 V; TA = −55°C to +125°C | 4 |
| Supply Voltage |  | 3 |  | 5.5 | V |  | 4 |
| POR Threshold |  | 2.75 |  |  | V |  | 4 |
| Supply Current (peak) |  |  |  | 0.8 | mA | Peak Current while Converting and I2C Interface Inactive | 4 |
| Average Current |  |  | 0.44 | 0.575 | mA | Average Current over 1 Conversion Cycle | 4 |
| Shutdown Mode Supply Current at 3.3 V |  |  | 3 | 12 | µA | Supply Current in Shutdown Mode at 3.3 V Supply | 4 |
| Output Low Voltage, OS/ALERT | VOL |  | 0.15 | 0.4 | V | IOL = 4 mA | 4 |
| High Output Leakage Current, OS/ALERT | IOH |  | 0.1 | 5 | µA | OS/ALERT Pin Pulled Up to 5.5 V | 4 |
| Input Current, SDA/SCL |  |  |  | 1 | µA | VIN = 0 V to VDD | 4 |
| Input Low Voltage, VIL, SDA/SCL | VIL |  |  | 0.3 | x VDD | VDD = 3.3 V (Note 3) | 4 |
| Input High Voltage, VIH, SDA/SCL | VIH | 0.7 |  |  | x VDD | VDD = 3.3 V (Note 3) | 4 |
| SCL, SDA Glitch Rejection |  |  |  | 50 | ns | Input Filtering Suppresses Noise Spikes of Less than 50 ns | 4 |
| Output High Current, SDA | IOH |  |  | 1 | µA | VOH = 5 V | 4 |
| Output Low Voltage, SDA | VOL |  |  | 0.4 | V | IOL = 3 mA | 4 |

## CAD (KiCad official)

- Symbol: `NCT75MNR2G`
- Footprint: `Package_DFN_QFN:DFN-8-1EP_2x2mm_P0.5mm_EP0.6x1.2mm`
- 3D model: DFN-8-EP(2x2) (KiCad packages3D, STEP)
- 3D model files: `nct75mnr2g-etched.step` / `nct75mnr2g-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `nct75mnr2g.step` / `nct75mnr2g.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [onsemi datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586193870275694592) (15 pp, sha256 `658803018fef41c6`, 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](docs/nct75mnr2g-datasheet.pdf)