# TUSB321RWBR

::adom-verified{src="/adom/tusb321rwbr/render/verification.json"}

**Texas Instruments** · Specialized · X2-QFN-12(1.6x1.6)

TUSB321RWBR from Texas Instruments, in a X2-QFN-12(1.6x1.6). Symbol, footprint and 3D model are the ones used on Adom board designs (3D model: KiCad library 3D model Texas_X2QFN-12_1.6x1.6mm_P0.4mm (built with the KiCad generator) (CC-BY-SA 4.0 with the KiCad library exception)). Pin functions are extracted from the manufacturer datasheet with page references.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | CC1 | bidirectional | Type-C configuration channel signal 1. [datasheet p.3] |
| 2 | CC2 | bidirectional | Type-C configuration channel signal 2. [datasheet p.3] |
| 3 | CURRENT_MODE | input | Advertise VBUS current. This 3-level input controls current advertisement in DFP mode or DRP mode connected as source. L: default current, pull-down to GND or leave unconnected. M: medium (1.5A) current, pull-up to VDD with a 500-kΩ resistor. H: high (3.0A) current, pull-up to VDD with a 10-kΩ resistor. [datasheet p.3] |
| 4 | PORT | input | Tri-level input pin to indicate port mode; its state is sampled when VDD is active. H: DFP (pull-up to VDD). NC: DRP (leave unconnected). L: UFP (pull-down or tie to GND). [datasheet p.3] |
| 5 | VBUS_DET | input | 5- to 28-V VBUS input voltage. VBUS detection determines UFP attachment. One RVBUS external resistor is required between system VBUS and the VBUS_DET pin. [datasheet p.3] |
| 6 | ~{VCONN_FAULT} | open_collector | Open-drain output, asserted low for tFAULT when a VCONN over-current fault is detected. [datasheet p.3] |
| 7 | OUT1 | open_collector | Open-drain output communicating Type-C current mode detect when the device is in UFP mode: default current mode detected (H); medium or high current mode detected (L). [datasheet p.3] |
| 8 | OUT2 | open_collector | Open-drain output communicating Type-C current mode detect when the device is in UFP mode: default or medium current mode detected (H); high current mode detected (L). [datasheet p.3] |
| 9 | ID | open_collector | Open-drain output; asserted low when the CC pins detect device attachment when the port is a source (DFP), or dual-role (DRP) acting as source (DFP). [datasheet p.3] |
| 10 | GND | power_in | Ground. [datasheet p.3] |
| 11 | DIR | open_collector | Plug direction. This open-drain output indicates the detected plug orientation: Type-C plug position 2 (H); Type-C plug position 1 (L). [datasheet p.3] |
| 12 | VDD | power_in | Positive supply voltage. [datasheet p.3] |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | X2-QFN-12(1.6x1.6) |
| Category | Interface |
| Pins | 12 |
| LCSC | C139392 |
| Mouser | 595-TUSB321RWBR |
| DigiKey | 296-42400-2-ND |
| Distributor summary (LCSC listing, not datasheet) | -40℃~+85℃ 100uA 100uA 4.5V~5.5V Transceiver X2-QFN-12(1.6x1.6) USB Converters ROHS |

## CAD

- Symbol: `tusb321rwbr` (source library `Interface_USB:TUSB321`)
- Footprint: `Package_DFN_QFN:Texas_X2QFN-12_1.6x1.6mm_P0.4mm`
- 3D model path in footprint: `${KIPRJMOD}/tusb321rwbr.step`
- 3D files: `tusb321rwbr-etched.step` / `tusb321rwbr-etched.glb` carry the MPN etch as a separate `Adom.LaserEtch` part; `tusb321rwbr.step` / `tusb321rwbr.glb` are the bare model.
- EAGLE/Fusion library: `tusb321rwbr.lbr` (adom-lbr)

## Provenance

- **Datasheet:** [Texas Instruments TUSB321 datasheet](https://www.ti.com/lit/ds/symlink/tusb321.pdf) (SLLSEO6C, revised August 2018, sha256 `ef1cea96d1e85a98`, retrieved 2026-10-27, tier: mfr)
- **CAD:** Footprint and symbol as used on Adom board designs; 3D model: KiCad library 3D model Texas_X2QFN-12_1.6x1.6mm_P0.4mm (built with the KiCad generator) (CC-BY-SA 4.0 with the KiCad library exception).
- **Pins:** KiCad symbol from the source board + adom-ds2sf datasheet extraction (claude-opus-4-7).

[Datasheet PDF](docs/tusb321rwbr-datasheet.pdf)