SLLSEO6C June   2015  – August 2018 TUSB321


  1. Features
  2. Applications
  3. Description
    1.     Device Images
      1.      Simplified Schematic
      2.      Sample Applications
  4. Revision History
  5. Pin Configuration and Functions
    1.     Pin Functions
  6. Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Switching Characteristics
  7. Detailed Description
    1. 7.1 Overview
      1. 7.1.1 Cables, Adapters, and Direct Connect Devices
        1. USB Type-C Receptacles and Plugs
        2. USB Type-C Cables
        3. Legacy Cables and Adapters
        4. Direct Connect Devices
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Port Role Configuration
        1. Downstream Facing Port (DFP) - Source
        2. Upstream Facing Port (UFP) - Sink
        3. Dual Role Port (DRP)
      2. 7.3.2 Type-C Current Mode
      3. 7.3.3 VBUS Detection
      4. 7.3.4 Cable Orientation and External MUX Control
      5. 7.3.5 VCONN Support for Active Cables
    4. 7.4 Device Functional Modes
      1. 7.4.1 Unattached Mode
      2. 7.4.2 Active Mode
  8. Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 DFP Mode
        1. Design Requirements
        2. Detailed Design Procedure
        3. Application Curve
    3. 8.3 Initialization Set Up
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Receiving Notification of Documentation Updates
    2. 11.2 Community Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

Pin Configuration and Functions

RWB Package
12-Pin X2QFN
Top View
TUSB321 pinout_RWB12_sllseo6.gif

Pin Functions

CC1 1 I/O Type-C configuration channel signal 1
CC2 2 I/O Type-C configuration channel signal 2
CURRENT_MODE 3 I Advertise VBUS current. This 3-level input is used to control current advertisement in DFP mode or DRP mode connected as source. (See Table 2.)

L - Default Current. Pull-down to GND or leave unconnected.

M - Medium (1.5A) current. Pull-up to VDD with 500-kΩ resistor.

H - High (3.0A) current. Pull-up to VDD with 10-kΩ resistor.

PORT 4 I Tri-level input pin to indicate port mode. The state of this pin is sampled when VDD is active.

H - DFP (Pull-up to VDD if DFP mode is desired)

NC - DRP (Leave unconnected if DRP mode is desired)

L - UFP (Pull-down or tie to GND if UFP mode is desired)
VBUS_DET 5 I 5- to 28-V VBUS input voltage. VBUS detection determines UFP attachment. One RVBUS external resistor required between system VBUS and VBUS_DET pin.
VCONN_FAULT 6 O Open-drain output and is asserted low for tFAULT when VCONN over-current fault is detected. (See Figure 2.)
OUT1 7 I/O This pin is an open drain output for 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). (See Table 2.)
OUT2 8 I/O This pin is an open drain output for 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). (See Table 2.)
ID 9 O Open drain output; asserted low when the CC pins detect device attachment when port is a source (DFP), or dual-role (DRP) acting as source (DFP).
GND 10 G Ground
DIR 11 O DIR of plug. This open drain output indicates the detected plug orientation: Type-C plug position 2 (H); Type-C plug position 1 (L).
VDD 12 P Positive supply voltage