TUSB321RWBR-Q1 - USB Type-C CC Logic Port Control | TI
MPN: TUSB321RWBR-Q1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.72 | $0.72 |
| 10 | $0.65 | $6.50 |
| 100 | $0.52 | $52.00 |
| 500 | $0.44 | $220.00 |
| 1,000 | $0.38 | $380.00 |
| 3,000 | $0.33 | $990.00 |
TUSB321RWBR-Q1 Overview
A USB Type-C port controller (also called a CC logic chip or port control IC) is a small companion device that manages the configuration channel pins of a Type-C connector. It sits in the hierarchy: port controller -> USB interface IC -> USB connectivity semiconductor -> power/data management. It detects attach and detach events, determines cable orientation, performs role detection, and advertises current capability through the dedicated current mode pin.
Key features include support for up to 3A of current advertisement through the dedicated current mode pin, configurable port roles of DFP (source), UFP (sink), or dual role port (DRP), and integrated VCONN supply switching for actively marked cables. The device autonomously handles Rd/Rp termination switching on the CC pins according to cable orientation, offloading this logic from the system microcontroller.
The TUSB321 implements the CC layer with a simple pin-strap configuration (PORT pin) rather than an I2C interface, minimizing firmware complexity and cost for systems that do not need Power Delivery negotiation. Its automotive qualification (AEC-Q100) makes it suitable for infotainment, telematics, and charging ports in vehicles, while the 1.6 mm x 1.6 mm X2QFN footprint fits space-constrained smartphone, tablet, and accessory designs.
Typical applications include automotive USB Type-C charging ports, host and device port attach detection in notebooks, docking stations, and power-bank sink/source role management.
Design tip: strap the PORT pin for the required role at power-up; if you later need USB Power Delivery negotiation, migrate to the I2C-controlled TUSB322 family, which shares the same X2QFN footprint.
Drop-in alternatives for TUSB321RWBR-Q1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with TUSB321RWBR-Q1 (same form factor and footprint) — differing in Function, Package, Current Advertisement, RoHS Status, Cable Orientation Detection.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TUSB321AIRWBR
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TUSB321RWBR
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View Datasheet →TUSB322IRWBR
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TUSB320LAIRWBR
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View Datasheet →TUSB324IRWBR
⚡ Same Package📋 Reference alternative (not in catalog)
TUSB321RWBR-Q1
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$0.33 / Unit
View Datasheet →TUSB321RWBR-Q1 Maximum Ratings & Electrical Characteristics
| Function | USB Type-C CC logic and port control with VCONN |
| USB Standard | USB Type-C Specification 1.1 (backward compatible with 1.0) |
| Supply Voltage Range | 4.5 V to 5.5 V |
| Current Advertisement | Up to 3 A via dedicated current mode pin |
| Port Roles | DFP (source), UFP (sink), DRP (dual role) |
| Configuration Interface | Pin-strap (PORT pin), no I2C |
| VCONN Support | Yes |
| Cable Orientation Detection | Yes (CC1/CC2) |
| Attach/Detach Detection | Yes |
| Package | 12-X2QFN (1.6 mm x 1.6 mm) |
| Mounting Type | Surface Mount |
| Automotive Qualification | AEC-Q100 qualified (-Q1 version) |
| RoHS Status | Compliant |
TUSB321RWBR-Q1 Pin Configuration
| Pin 1 | VCONN — VCONN switch output for powering e-marked cables |
| Pin 2 | VBUS — VBUS sense / power input |
| Pin 3 | CC1 — Type-C configuration channel pin 1 |
| Pin 4 | CC2 — Type-C configuration channel pin 2 |
| Pin 5 | PORT — Port role configuration pin (DFP/UFP/DRP strap) |
| Pin 6 | DIR — Cable orientation indicator output |
| Pin 7 | ID — Attach / role detection status output |
| Pin 8 | LA / Current Mode — Current mode advertisement control |
| Pin 9 | GND — Ground |
| Pin 10 | VDD — 4.5V to 5.5V supply input |
| Pin 11 | A1/A2 pads — [DATA_NEEDED: pin functions per datasheet] |
| Pin 12 | Reserved — [DATA_NEEDED: pin functions per datasheet] |
Typical Applications
TUSB321RWBR-Q1 is suitable for 6 applications: Automotive USB Type-C Charging Ports, Notebook and Tablet Host Ports (DFP), Power Bank Sink/Source Role Management (DRP), Docking Stations and Monitors, Industrial and Medical Peripheral Ports, Infotainment Front-Panel Type-C Extenders.
Automotive USB Type-C Charging Ports
The TUSB321RWBR-Q1 fits automotive charging ports because its AEC-Q100 qualification and 4.5V to 5.5V supply tolerance match the noisy 5V USB rails in vehicles. The dedicated current mode pin advertises up to 3A for fast charging, while autonomous CC attach and orientation detection removes firmware burden from the body-controller MCU. Placed next to the Type-C receptacle with 0.1uF decoupling, it enables the VBUS source when a sink attaches, improving quiescent power in always-on automotive contexts.
Recommended
Notebook and Tablet Host Ports (DFP)
In host applications, the TUSB321RWBR-Q1 is strapped for DFP (source) mode and applies Rp terminations on the CC pins to signal available current to attached devices. Its 1.6 mm x 1.6 mm X2QFN footprint fits the dense USB connector area of thin notebooks. The DIR output indicates cable orientation so the system can multiplex SuperSpeed lanes without software timing risk, and VCONN support powers e-marked cables rated for higher currents.
Recommended
Power Bank Sink/Source Role Management (DRP)
Configured as a dual role port (DRP), the TUSB321RWBR-Q1 lets a power bank alternate between sink and source roles using its periodic DRP toggle. Role detection happens autonomously on the CC pins, and the ID/attach output notifies the charger IC to enable discharge or charge paths. Because the current mode pin directly advertises up to 3A, the bank can fast-charge phones without a dedicated PD controller, keeping BOM cost low in portable designs.
Recommended
Docking Stations and Monitors
Docking stations with multiple Type-C receptacles use the TUSB321RWBR-Q1 for per-port attach detection and orientation reporting. Its low pin count and X2QFN size allow placement at each connector, while the current mode pin supports 3A advertisement for downstream device charging. The device backward compatibility with USB Type-C 1.0 ensures interoperability with legacy accessories, and VCONN switching marks support for actively cabled high-power docking implementations.
Recommended
Industrial and Medical Peripheral Ports
Industrial HMIs and medical peripherals benefit from the TUSB321RWBR-Q1 when a Type-C connector replaces legacy USB-A ports. Attach detection prevents VBUS from being enabled into an open connector, saving standby power, and orientation detection simplifies PCB routing of high-speed muxes. The 4.5V to 5.5V supply window tolerates industrially noisy 5V rails, and its RoHS compliance supports global equipment shipments in these regulated markets.
Recommended
Infotainment Front-Panel Type-C Extenders
TI's front-panel Type-C extender reference design style uses a CC controller like the TUSB321RWBR-Q1 at the remote receptacle while CC logic must remain near the head unit. The DIR output drives an orientation-controlled SuperSpeed mux, and the device handles detach events to disable the link cleanly. Its AEC-Q100 grade covers the automotive cabin temperature range, and the 1.6 mm x 1.6 mm X2QFN fits within the extender module housing near the connector.
Recommended
Recommended Products Summary
Engineering reference data for TUSB321RWBR-Q1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TUSB321AIRWBR | TUSB321RWBR | TUSB322IRWBR | TUSB320LAIRWBR |
|---|---|---|---|---|---|
| Package | 12-X2QFN (1.6x1.6) | 12-X2QFN - same | 12-X2QFN - same | 12-X2QFN - same | 12-X2QFN - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Supply Voltage | 4.5V to 5.5V | 4.5V to 5.5V | 4.5V to 5.5V | 4.5V to 5.5V | 4.5V to 5.5V |
| Current Advertisement | Up to 3A via current mode pin | Up to 3A | Up to 3A | PD negotiated | Up to 3A (no VCONN) |
| USB PD Support | No | No | No | Yes (PD 3.0) | No |
| Configuration | Pin-strap (no I2C) | Pin-strap | Pin-strap | I2C | Pin-strap / I2C |
| Automotive AEC-Q100 | Yes (-Q1) | No | No | No | No |
| VCONN Support | Yes | Yes | Yes | Yes | No |
Key Differentiators
- AEC-Q100 automotive qualification (vs TUSB321RWBR)
- Integrated VCONN switch (vs TUSB320LAIRWBR)
- Simplest configuration path to PD migration (vs TUSB322IRWBR)
Design Notes
Place the TUSB321RWBR-Q1 within 5 mm of the Type-C receptacle CC pins to keep the CC trace short and impedance-controlled. Use 0.1uF ceramic decoupling on VDD placed within 2 mm of the pin, and keep the VCONN trace rated for up to 3A with adequate copper width (at least 0.5 mm for 1 oz copper on short runs). The X2QFN 1.6 mm x 1.6 mm footprint requires fine-pitch reflow profiles per TI's X2QFN application note.
The PORT pin determines DFP, UFP, or DRP mode via strap and is latched at power-up - ensure the strap voltage is stable before VDD crosses the POR threshold. Do not connect both CC1 and CC2 to a common net; orientation detection requires independent routing to the connector. Systems needing Power Delivery must not use this device's 3A advertisement as a PD contract - migrate to TUSB322 instead.
The DIR output drives SuperSpeed lane orientation muxes. Add a small RC (e.g., 1k ohm / 100 pF) on DIR to debounce glitches during attach, and ensure the mux control logic follows DIR only after attach (ID) is asserted, avoiding mid-connection lane swaps that can corrupt USB 3.x links.
Compliance Information
AEC-Q100 qualified per -Q1 suffix. RoHS compliance per TI product page; REACH and halogen status not stated in provided data.
