# TPD8S300ARUKR

**Texas Instruments** · Surge Protection Devices (SPDs) · WQFN-20-EP(3x3)

TPD8S300ARUKR from Texas Instruments, in a WQFN-20-EP(3x3). 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 | C_SBU1 | bidirectional | Connector side of SBU1 over-voltage protection FET; rated for 24 V maximum per absolute maximum ratings. |
| 2 | C_SBU2 | bidirectional | Connector side of SBU2 over-voltage protection FET; rated for 24 V maximum per absolute maximum ratings. |
| 3 | VBIAS | power_in | Power supply for ESD support capacitor; requires 0.1 µF capacitor connected to ground; rated for 24 V maximum. |
| 4 | C_CC1 | bidirectional | Connector side of CC1 over-voltage protection FET; rated for 24 V maximum per absolute maximum ratings. |
| 5 | C_CC2 | bidirectional | Connector side of CC2 over-voltage protection FET; rated for 24 V maximum per absolute maximum ratings. |
| 6 | RPD_G2 | bidirectional | Dead battery pull-down resistor control for CC2; short to C_CC2 for dead battery function or to GND if not used; rated for 24 V maximum. |
| 7 | RPD_G1 | bidirectional | Dead battery pull-down resistor control for CC1; short to C_CC1 for dead battery function or to GND if not used; rated for 24 V maximum. |
| 8 | GND | power_in | Ground reference. |
| 9 | FLT | output | Open-drain fault output for over-voltage or over-current fault detection; rated for 6 V maximum per absolute maximum ratings. |
| 10 | VPWR | power_in | Power supply input; nominal 3.3 V, range 2.7 V to 3.6 V per recommended operating conditions. |
| 11 | CC2 | bidirectional | System side of CC2 over-voltage protection FET connected to CC/PD controller; rated for 5.5 V maximum per recommended operating conditions. |
| 12 | CC1 | bidirectional | System side of CC1 over-voltage protection FET connected to CC/PD controller; rated for 5.5 V maximum per recommended operating conditions. |
| 13 | GND | power_in | Ground reference. |
| 14 | SBU2 | bidirectional | System side of SBU2 over-voltage protection FET; rated for 4.3 V maximum per recommended operating conditions. |
| 15 | SBU1 | bidirectional | System side of SBU1 over-voltage protection FET; rated for 4.3 V maximum per recommended operating conditions. |
| 16 | D4 | bidirectional | USB 2.0 IEC ESD protection pin; rated for 5.5 V maximum per recommended operating conditions. |
| 17 | D3 | bidirectional | USB 2.0 IEC ESD protection pin; rated for 5.5 V maximum per recommended operating conditions. |
| 18 | GND | power_in | Ground reference. |
| 19 | D2 | bidirectional | USB 2.0 IEC ESD protection pin; rated for 5.5 V maximum per recommended operating conditions. |
| 20 | D1 | bidirectional | USB 2.0 IEC ESD protection pin; rated for 5.5 V maximum per recommended operating conditions. |
| 21 | Thermal Pad | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | WQFN-20-EP(3x3) |
| Category | Circuit Protection |
| Pins | 21 |

## CAD (KiCad official)

- Symbol: `TPD8S300ARUKR`
- Footprint: `Package_DFN_QFN:UQFN-20-1EP_3x3mm_P0.4mm_EP1.85x1.85mm`
- 3D model: WQFN-20-EP(3x3) (KiCad packages3D, STEP)
- 3D model files: `tpd8s300arukr-etched.step` / `tpd8s300arukr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tpd8s300arukr.step` / `tpd8s300arukr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/tpd8s300a) (36 pp, sha256 `ee1189169adbc2bf`, retrieved 2026-10-07, 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-4-5-20251001` (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/tpd8s300arukr-datasheet.pdf)