# DS18B20Z

**UMW** · Temperature Sensors · SOIC-8

DS18B20Z from UMW, in a SOIC-8. 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 | N.C. | unconnected | No Connection pin; the datasheet lists it as not connected. |
| 2 | N.C. | unconnected | No Connection pin; the datasheet lists it as not connected. |
| 3 | VDD | power_in | Optional supply pin; VDD must be grounded for operation in parasite power mode. |
| 4 | DQ | bidirectional | Open-drain 1-Wire data input/output that also provides power to the device when used in parasite power mode. |
| 5 | GND | power_in | Ground reference for the device. |
| 6 | N.C. | unconnected | No Connection pin; the datasheet lists it as not connected. |
| 7 | N.C. | unconnected | No Connection pin; the datasheet lists it as not connected. |
| 8 | N.C. | unconnected | No Connection pin; the datasheet lists it as not connected. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | UMW |
| Package | SOIC-8 |
| Category | Sensors |
| Pins | 8 |

## 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 | 2.5 |  | 5.5 | V |  | 23 |
| Input Logic-High | VIH | 2.2 |  |  | V |  | 23 |
| Input Logic-Low | VIL | -0.3 |  |  | V |  | 23 |
| Sink Current | IL | 4 |  |  | mA | VIO=0.4V | 23 |
| Standby Current | IDDS |  | 750 | 1000 | nA | Standby current specified up to +70°C (note 7) | 23 |
| Active Current | IDD |  |  | 1.5 | mA | Active current during temperature conversions or EEPROM writes (note 9) | 23 |
| Absolute Maximum Voltage Range on Any Pin Relative to Ground |  | -0.5 |  | 6 | V |  | 23 |
| Operating Temperature Range |  | -55 |  | 125 | °C |  | 23 |
| Storage Temperature Range |  | -55 |  | 125 | °C |  | 23 |
| Write Cycle Time | tWR |  |  | 10 | ms | Copy Scratchpad to EEPROM; bus held high by strong pullup | 25 |
| Time to Strong Pullup On | tSPON |  |  | 10 | µs | Start Convert T Command Issued | 25 |
| Capacitance | CIN/OUT |  |  | 25 | pF |  | 25 |

## CAD (KiCad official)

- Symbol: `DS18B20Z`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `ds18b20z-etched.step` / `ds18b20z-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ds18b20z.step` / `ds18b20z.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [UMW datasheet](docs/ds18b20z-datasheet.pdf) (31 pp, sha256 `a032e7e0ab6e3df7`, retrieved 2026-11-04, 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/ds18b20z-datasheet.pdf)