1 Features

1• USB Type-C™ Specification 1.1

• Backward Compatible with USB Type-C

Specification 1.0

• Supports Up to 3 A of Current Advertisement

through dedicated Current Mode pin

• Mode Configuration

– Host Only – DFP (Source)

– Device Only – UFP (Sink)

– Dual Role Port – DRP

• Channel Configuration (CC)

– Attach of USB Port Detection

– Cable Orientation Detection

– Role Detection

– Type-C Current Mode advertisement and

detection (Default, Medium, High)

• VBUS Detection

• VCONN Support for Active Cables

• Cable Detection and Direction Control

for External Switches

• Supply Voltage: 4.5 V to 5.5 V

• Low Current Consumption

2 Applications

• Host, Device, Dual Role Port Applications

• Mobile Phones

• Tablets and Notebooks

• USB Peripherals

3 Description

The TUSB321 device enables USB Type-C ports with

the configuration channel (CC) logic needed for Type-

C ecosystems. The TUSB321 device uses the CC

pins to determine port attach and detach, cable

orientation, role detection, and port control for Type-C

current mode. The TUSB321 device can be

configured as a downstream facing port (DFP),

upstream facing port (UFP) or a dual role port (DRP)

making it ideal for any application.

The TUSB321 device when configured as a DRP

alternates configuration as a DFP or UFP according

to the Type-C Specifications. The CC logic block

monitors the CC1 and CC2 pins for pullup or

pulldown resistances to determine when a USB port

has been attached, the orientation of the cable, and

the role detected. The CC logic detects the Type-C

current mode as default, medium, or high depending

on the role detected. VBUS detection is implemented

to determine a successful attach in UFP and DRP

modes.

The device operates over a wide supply range and

has low-power consumption.