# NS18B20-QTOS

**NOVOSENSE** · Temperature Sensors · TO-92

NS18B20-QTOS from NOVOSENSE, in a TO-92. 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 reference pin for the device. |
| 2 | DQ | bidirectional | Open-drain 1-Wire data input/output that requires a weak pull-up resistor on the bus and also supplies power to the device in parasite power mode. |
| 3 | VDD | power_in | Optional supply pin for 2.7 V to 5.5 V external power, which must be grounded for operation in parasite power mode. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | NOVOSENSE |
| Package | TO-92 |
| 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 | -0.3 |  | 5.5 | V | 25℃ | 3 |
| Voltage range on any pin relative to ground |  | -0.3 |  |  | V | 25℃ | 3 |
| Operating temperature | TBoperation | -55 |  | 125 | ℃ |  | 3 |
| Storage temperature |  | -55 |  | 125 | ℃ |  | 3 |
| Supply voltage (local power) | VDD | 2.7 |  | 5.5 | V | Local Power; -55℃ to +125℃ | 3 |
| Pullup supply voltage | VPU | 2.7 |  | 5.5 | V | -55℃ to +125℃; VDD=2.7V to 5.5V | 3 |
| Thermometer error | Terr |  |  | 0.5 | ℃ | -10℃ to 85℃ | 3 |
| Thermometer error | Terr |  |  | 1 | ℃ | -55℃ to 125℃ | 3 |
| Input logic-low voltage | VIL | -0.3 |  | 0.75 | V |  | 3 |
| Sink current | IL |  | 4 |  | mA | VI/O=0.4V | 3 |
| Standby current | IDDS |  | 1.5 |  | uA |  | 3 |
| Active current | IDD |  | 26 |  | uA | VDD=3.3V | 3 |
| DQ input current | IDQ |  | 5 |  | µA |  | 3 |
| NV write cycle time | tWR |  | 10 |  | ms | Non-volatile storage write cycle | 4 |
| EEPROM write times |  |  | 10000 |  | writes | -55°C to +55°C | 4 |
| EEPROM data retention | tEEDR |  | 10 |  | years | -55°C to +55°C | 4 |
| Time slot | tSLOT | 60 |  | 120 | µs |  | 4 |
| Write 0 low time | tLOW0 | 60 |  | 120 | µs |  | 4 |
| Write 1 low time | tLOW1 | 1 |  | 15 | µs |  | 4 |
| Presence-detect high | tPDHIGH | 15 |  | 60 | µs |  | 5 |
| Presence-detect low | tPDLOW | 60 |  | 240 | µs |  | 5 |
| Temperature conversion time | tCONV |  | 50 |  | ms | 9-bit resolution | 4 |
| Time to strong pullup on start convert T command issued |  |  | 100 |  | µs |  | 4 |
| Write EEPROM strong pull-up time |  |  | 10 |  | ms |  | 4 |
| Recovery time | tREC |  | 1 |  | µs |  | 4 |
| Read data valid | tRDV |  | 15 |  | µs |  | 4 |
| Reset time high | tRSTH |  | 480 |  | µs |  | 5 |
| Reset time low | tRSTL |  | 480 |  | µs |  | 5 |
| Capacitance | CIN/OUT |  | 25 |  | pF |  | 5 |

## CAD (KiCad official)

- Symbol: `NS18B20-QTOS`
- Footprint: `Package_TO_SOT_THT:TO-92_Inline`
- 3D model: TO-92 (KiCad packages3D, STEP)
- 3D model files: `ns18b20-qtos-etched.step` / `ns18b20-qtos-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ns18b20-qtos.step` / `ns18b20-qtos.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [NOVOSENSE datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588888667432112128) (25 pp, sha256 `f93e4e3e5f4045c5`, retrieved 2026-10-17, 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/ns18b20-qtos-datasheet.pdf)