# GX1831

**GXCAS** · Temperature Sensors · TO-92

GX1831 from GXCAS, 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 pin for the device; it is the reference for all voltages on the part, which the datasheet states are measured to ground. |
| 2 | DQ | bidirectional | Open-drain 1-Wire data input/output that needs an external pull-up of about 4.7 kΩ to VPU, and which also supplies the chip in parasite-power mode. |
| 3 | VDD | power_in | Supply pin for external power, operating from 2.5 V to 5.5 V, and it must be connected to GND when the device runs in parasite-power mode. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | GXCAS |
| 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 |
|---|---|---|---|---|---|---|---|
| Temperature measurement accuracy |  | -0.4 |  | 0.4 | °C | -10°C to +70°C | 1 |
| Supply voltage (VDD) | VDD | 2.5 |  | 5.5 | V | DC characteristics range -55°C to +125°C | 20 |
| Voltage range on any pin to ground |  | -0.5 |  | 6 | V | Each pin to ground | 20 |
| Operating temperature range |  | -55 |  | 125 | °C |  | 20 |
| Storage temperature range |  | -55 |  | 125 | °C |  | 20 |
| Temperature conversion time | tCONV |  |  | 1.5 | ms | 12-bit resolution | 21 |
| Time to strong pullup on | tSPON |  |  | 10 | µs | After Convert T command issued | 21 |
| Time slot | tSLOT | 60 |  | 120 | µs |  | 21 |
| Recovery time | tREC | 1 |  |  | µs |  | 21 |
| Write 0 low time | tLOW0 | 60 |  | 120 | µs |  | 21 |
| Write 1 low time | tLOW1 | 1 |  | 15 | µs |  | 21 |
| Read data valid | tRDV |  |  | 15 | µs |  | 21 |
| Reset time high | tRSTH | 480 |  |  | µs |  | 21 |
| Presence-detect high | tPDHIGH | 15 |  | 60 | µs |  | 21 |
| Presence-detect low | tPDLOW | 60 |  | 240 | µs |  | 21 |
| Parasite-powered supply current |  |  |  | 1.5 | mA | Parasite-powered mode, during temperature conversion or EEPROM copy | 6 |
| 1-Wire bus external pull-up resistor |  |  | 4.7 |  | kΩ | 1-Wire bus pull-up to VPU | 10 |

## CAD (KiCad official)

- Symbol: `GX1831`
- Footprint: `Package_TO_SOT_THT:TO-92_Inline`
- 3D model: TO-92 (KiCad packages3D, STEP)
- 3D model files: `gx1831-etched.step` / `gx1831-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `gx1831.step` / `gx1831.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [GXCAS datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588946671292329984) (24 pp, sha256 `63b29f82b79b99e0`, 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/gx1831-datasheet.pdf)