# MCP9802A0T-M

**Microchip Tech** · Temperature Sensors · SOT-23-5

MCP9802A0T-M from Microchip Tech, in a SOT-23-5. 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 | The VDD pin is the power supply input, and the operating voltage specified in the DC electrical specification table must be applied to it (the Features list gives 2.7V to 5.5V). |
| 2 | GND | power_in | The GND pin is the system ground pin. |
| 3 | ALERT | output | Open-drain temperature alert output that signals when the ambient temperature goes beyond the user-programmed temperature limit. |
| 4 | SCLK | input | Serial clock input; all communication and timing is relative to this signal, which is generated by the host controller on the bus. |
| 5 | SDA | bidirectional | Bidirectional serial data pin used to transmit data to and from the host controller, which requires a pull-up resistor to output data. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | SOT-23-5 |
| Category | Sensors |
| Pins | 5 |

## 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 Voltage Range | VDD | 2.7 |  | 5.5 | V |  | 3 |
| Operating Current | IDD |  | 200 | 400 | µA | Continuous Operation | 3 |
| Shutdown Current | ISHDN |  | 0.1 | 1 | µA | Shutdown mode | 3 |
| Temperature Sensor Accuracy, -10°C to +85°C | TACY | -1 |  | 1 | °C | -10°C < TA +85°C, VDD = 3.3V | 3 |
| Temperature Sensor Accuracy, -10°C to +125°C | TACY | -2 |  | 2 | °C | -10°C < TA +125°C, VDD = 3.3V | 3 |
| Temperature Sensor Accuracy, -55°C to +125°C | TACY | -3 |  | 3 | °C | -55°C < TA +125°C, VDD = 3.3V | 3 |
| Conversion Time, 9-bit Resolution | tCONV |  | 30 | 75 | ms | 33 samples/sec (typical) | 3 |
| Conversion Time, 10-bit Resolution | tCONV |  | 60 | 150 | ms | 17 samples/sec (typical) | 3 |
| Conversion Time, 11-bit Resolution | tCONV |  | 120 | 300 | ms | 8 samples/sec (typical) | 3 |
| Conversion Time, 12-bit Resolution | tCONV |  | 240 | 600 | ms | 4 samples/sec (typical) | 3 |
| Alert Output High-level Current | IOH |  |  | 1 | µA | VOH = 5V | 3 |
| Alert Output Low-level Voltage | VOL |  |  | 0.4 | V | IOL= 3 mA | 3 |
| Serial Input Current | IIN | -1 |  | 1 | µA |  | 4 |
| SDA Output Low-level Voltage | VOL |  |  | 0.4 | V | IOL= 3 mA | 4 |
| SDA Output High-level Current | IOH |  |  | 1 | µA | VOH = 5V | 4 |
| SDA Output Low-level Current | IOL | 6 |  |  | mA | VOL = 0.6V | 4 |
| Specified Temperature Range | TA | -55 |  | 125 | °C | (Note 1) | 4 |
| Operating Temperature Range | TA | -55 |  | 125 | °C |  | 4 |
| Storage Temperature Range | TA | -65 |  | 150 | °C |  | 4 |
| Thermal Resistance, 5L-SOT23 | JA |  | 256 |  | °C/W |  | 4 |
| VDD Supply Voltage (absolute maximum) | VDD |  |  | 6 | V |  | 3 |
| Voltage at all Input/Output pins |  |  |  | 5.5 | V |  | 3 |
| Ambient temperature with power applied | TA | -55 |  | 125 | °C |  | 3 |
| Junction Temperature | TJ |  |  | 150 | °C |  | 3 |
| Latch-Up Current at each pin |  | -200 |  | 200 | mA |  | 3 |
| Serial Port Frequency (SMBus) | fSC | 10 |  | 400 | kHz | SMBus MCP9802/03 | 5 |
| Clock Period | tSC | 2.5 |  |  | µs |  | 5 |
| Low Clock | tLOW | 1.3 |  |  | µs |  | 5 |
| High Clock | tHIGH | 0.6 |  |  | µs |  | 5 |
| Rise Time | tR | 20 |  | 300 | ns | 10% to 90% of VDD (SCLK, SDA) | 5 |
| Fall Time | tF | 20 |  | 300 | ns | 90% to 10% of VDD (SCLK, SDA) | 5 |
| Data Setup Before SCLK High | tSU-DATA | 0.1 |  |  | µs |  | 5 |
| Data Hold After SCLK Low | tH-DATA | 0 |  | 0.9 | µs |  | 5 |
| Start Condition Setup Time | tSU-START | 0.6 |  |  | µs |  | 5 |
| Start Condition Hold Time | tH-START | 0.6 |  |  | µs |  | 5 |
| Stop Condition Setup Time | tSU-STOP | 0.6 |  |  | µs |  | 5 |
| Bus Idle | tIDLE | 1.3 |  |  | µs |  | 5 |
| Time Out | tOUT | 25 | 35 | 50 | ms | MCP9802/03 only | 5 |

## 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 | MS = Plastic Micro Small Outline (MSOP), 8-lead SN = Plastic SOIC, (150 mil Body), 8-lead | 39 |

## CAD (KiCad official)

- Symbol: `MCP9802A0T-M`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `mcp9802a0t-m-etched.step` / `mcp9802a0t-m-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `mcp9802a0t-m.step` / `mcp9802a0t-m.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Microchip Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589795418067533824) (42 pp, sha256 `258fb1fd5fe119dc`, retrieved 2026-10-19, 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/mcp9802a0t-m-datasheet.pdf)