# M1820P

**Mysentech** · Temperature Sensors · TO-92S

M1820P from Mysentech, 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 | GND | power_in | Ground. |
| 2 | DQ | bidirectional | 1-Wire digital interface, open-drain, needs external pull-up of 1 kΩ to 10 kΩ (typ. 4.7 kΩ); VIL max 0.3*VDD, VIH min 0.7*VDD. |
| 3 | VDD | power_in | Power supply, 1.8 V to 5.5 V (3.3 V typ.), absolute maximum -0.3 to 6 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Mysentech |
| 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 | 1.8 | 3.3 | 5.5 | V |  | 8 |
| Input logic low voltage (DQ) | VIL |  |  | 0.3 | *VDD | DQ | 8 |
| Input logic high voltage (DQ) | VIH | 0.7 |  |  | *VDD | DQ | 8 |
| Output low voltage | VOL |  |  | 0.4 | V | IOL = -3 mA | 8 |
| Input leakage current | IIN | -0.1 |  | 0.1 | uA |  | 8 |
| Pull-up resistor | Rup | 1 | 4.7 | 10 | kΩ |  | 8 |
| Idle supply current (single-measurement mode) | IDD |  | 0.1 | 1 | uA | 空闲状态（单次测量模式） | 8 |
| Temperature measurement range |  | -70 |  | 150 | ℃ |  | 6 |
| Temperature error (M1820P) | tERR | -0.1 |  | 0.1 | ℃ | -20℃ to +30℃ | 6 |
| Temperature error (M1820P) | tERR | -0.2 |  | 0.2 | ℃ | -30℃ to -20℃ & +30℃ to +40℃ | 6 |
| Temperature error (M1820P) | tERR | -0.5 |  | 0.5 | ℃ | -70℃ to -30℃ & +40℃ to +70℃ | 6 |
| Temperature error (all variants) | tERR | -1.5 |  | 1.5 | ℃ | -55°C to +125°C | 6 |
| Temperature error (all variants) | tERR | -2 |  | 2 | ℃ | -70°C to +150°C | 6 |
| Long-term drift |  |  |  | 0.03 | °C/年 |  | 6 |
| Supply voltage (absolute maximum) | VDD | -0.3 |  | 6 | V |  | 8 |
| Voltage on any pin (absolute maximum) |  | -0.3 |  | 6 | V |  | 8 |
| Input current on pins (absolute maximum) |  | -100 |  | 100 | mA |  | 8 |
| Operating temperature range (absolute maximum) |  | -70 |  | 150 | ℃ |  | 8 |
| Storage temperature range (absolute maximum) |  | -70 |  | 150 | ℃ |  | 8 |
| ESD HBM (absolute maximum) |  | -8 |  | 8 | kV | Human body model | 8 |
| Non-volatile memory write cycle time | tWR |  |  | 40 | ms | -55℃到+125℃；VDD=1.8V到5.5V | 9 |
| EEPROM write endurance | NEEWR | 50000 |  |  | 次 | -55°C 到+55°C | 9 |
| Time slot length | tSLOT | 60 |  | 120 | µs | 见备注 | 23 |
| Recovery time | tREC | 1 |  | 5 | µs | 见备注 1 | 23 |
| Write 0 low time | tLOW0 | 60 | 60 | 120 | µs | 见备注 | 23 |
| Write 1 low time | tLOW1 | 1 | 5 | 15 | µs | 见备注 | 23 |
| Read data valid time | tRDV | 5 |  | 15 | µs | 见备注 | 23 |
| Reset low time | tRSTL | 480 |  | 960 | µs | 见备注 | 23 |
| Presence detect high time | tPDHIGH | 15 | 30 | 60 | µs | 见备注 | 23 |
| Presence detect low time | tPDLOW | 60 | 115 | 240 | µs | 见备注 | 23 |

## CAD (KiCad official)

- Symbol: `M1820P`
- Footprint: `Package_TO_SOT_THT:TO-92_Inline`
- 3D model: TO-92S (KiCad packages3D, STEP)
- 3D model files: `m1820p-etched.step` / `m1820p-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `m1820p.step` / `m1820p.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Mysentech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8757703727656374272) (29 pp, sha256 `ecdd68f8f5232fc5`, retrieved 2026-10-18, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **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/m1820p-datasheet.pdf)