# RJGT105T3

**Runjet(瑞纳捷)** · Security Verification / Encryption ICs · SOT-23-3

RJGT105T3 from Runjet(瑞纳捷), in a SOT-23-3. 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 | RSD | bidirectional | RSD single-wire bidirectional data pin that also serves as the chip supply input, with pull-up supply Vpup 2.4 V to 5.5 V and a 2.2 kΩ to 4.7 kΩ pull-up resistor, driven by a push-pull MCU IO capable of at least 1.5 mA. |
| 2 | VCAP | passive | External capacitor pin, which requires a capacitor of 2.2 µF to 10 µF (4.7 µF typical) connected to it. |
| 3 | GND | power_in | Chip power ground. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Runjet(瑞纳捷) |
| Package | SOT-23-3 |
| Category | Interface |
| 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 |
|---|---|---|---|---|---|---|---|
| RSD上拉供电电压 | Vpup | 2.4 | 3.3 | 5.5 | V |  | 18 |
| RSD上拉电阻 | Rpup | 2.2 | 2.2 | 4.7 | KΩ |  | 18 |
| VCAP管脚的外接电容 | C0 | 2.2 | 4.7 | 10 | uF |  | 18 |
| 输入低电压 | VIL | 0 |  |  | V |  | 18 |
| 环境温度 | TA | -40 | 25 | 85 | ℃ |  | 18 |
| 上升边沿的暂停时间 | TREH | 0.5 |  | 2 | us |  | 18 |
| 起始帧信号低电平时间 | TRSTL | 220 |  |  | us |  | 18 |
| 进入休眠的时间 | TSLEEP | 3 |  |  | s | RSD 保持高电平的时间 | 18 |
| 退出低功耗的时间 | TWAKEUP | 220 |  |  | us | RSD 保持低电平的时间 | 18 |
| 写 0 低电平时间 | TW0L | 45 | 50 | 55 | us |  | 18 |
| 写 1 低电平时间 | TW1L | 5 | 7 | 10 | us |  | 18 |
| 读低电平时间 | TRL | 5 | 7 | 10 | us |  | 18 |
| 输入负载电流 | IL |  |  | 0.18 | uA | RSD引脚接上拉电源 | 18 |
| 写页电流 | IWR |  |  | 0.24 | mA |  | 18 |
| 写一页数据的时间 | TWr |  |  | 25 | ms |  | 18 |
| 读一页数据的时间 | TRd |  |  | 10 | ms |  | 18 |
| 认证写一页数据的编程时间 | TAuthWr |  |  | 36 | ms |  | 18 |
| 认证读一页数据的时间 | TAuthRd |  |  | 27 | ms |  | 18 |
| 写/擦除次数限制 | NCY |  |  | 100 | K | 环境温度为+25℃ | 18 |
| 写/擦除次数限制 | NCY |  |  | 100 | K | 环境温度为+85℃ | 19 |
| 数据保留时间 | TDR |  |  | 10 | years | 环境温度为+85℃ | 19 |
| 静电放电电压（HBM） | VESD | -8000 |  | 8000 | V |  | 19 |
| 静电放电电压（MM） | VESD | -1000 |  | 1000 | V |  | 19 |
| 静电放电电压（CDM） | VESD | -2000 |  | 2000 | V |  | 19 |
| Latch-Up | LatchUp | -100 |  | 100 | mA |  | 19 |

## CAD (KiCad official)

- Symbol: `RJGT105T3`
- Footprint: `Package_TO_SOT_SMD:SOT-23-3`
- 3D model: SOT-23-3 (KiCad packages3D, STEP)
- 3D model files: `rjgt105t3-etched.step` / `rjgt105t3-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `rjgt105t3.step` / `rjgt105t3.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Runjet(瑞纳捷) datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8602897333394677760) (23 pp, sha256 `fa7f73e3dc1d402f`, retrieved 2026-10-17, 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/rjgt105t3-datasheet.pdf)