TUSB321AI USB Type-C Configuration Channel Logic and Port Control with VCONN
1 Features
- 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
- Industrial Temperature Range of –40 to 85°C
2 Applications
- Host, Device, Dual Role Port Applications
- Mobile Phones
- Tablets and Notebooks
- USB Peripherals
3 Description
The TUSB321AI device enables USB Type-C ports with the configuration channel (CC) logic needed for Type-C ecosystems. The TUSB321AI device uses the CC pins to determine port attach and detach, cable orientation, role detection, and port control for Type-C current mode. The TUSB321AI 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 TUSB321AI 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. The TUSB321AI device is available in industrial and commercial temperature ranges.
Device Information(1)
| PART NUMBER | PACKAGE | BODY SIZE (NOM) |
|---|---|---|
| TUSB321AI | X2QFN (12) | 1.60 mm × 1.60 mm |
- For all available packages, see the orderable addendum at the end of the data sheet.
Simplified Schematic
Sample Application
4 Revision History
Changes from * Revision (October 2015) to A Revision
- Changed RVBUS values From: MIN = 891, TYP = 900, MAX = 909 KΩ To: MIN = 855, TYP = 887, MAX = 920 KΩ Go
5 Pin Configuration and Functions
Pin Functions
| PIN | TYPE | DESCRIPTION | |
|---|---|---|---|
| NAME | NO. | ||
| 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 900-kΩ external resistor required between system VBUS and VBUS_DET pin. |
| VCONN_FAULT | 6 | O | Open-drain output and is asserted low for when VCONN over-current fault is detected. |
| OUT1 | 7 | I/O | This pin is an open drain output for communicating Type-C current mode detect when the TUSB321AI 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 TUSB321AI 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 |
