FEATURES
• Switch Matrix
– USB and UART Switch support USB 2.0 HS
– Audio Switch with Negative Signal
Capability
– ID Bypass Switch
– VBUS to MIC Switch
– DP to MIC Switch to Support MCPC
• Load Switch
– 100 mΩ Load Switch
– OTG Support
– 28 V VBUS Rating with Over-voltage
Protection
– Programmable Overcurrent
Limiter/Protection
• Charger Detection
– USB BCDv1.2 compliant
– VBUS Detection
– Data Contact Detection
– Primary and Secondary Detection
• Compatible Accessories
– USB Chargers (DCP, CDP)
– Apple Charger
– USB Data Port
– Audio Headset with MIC and Remote
– Docking Support
– Factory Cable
• Additional Features
– I2C Interface with Host Processor
– Switches Controlled by Automatic
Detection or Manual Control
– Interrupts Generated for Plug/Unplug
– Decoupling FET Switch to VBUS Added to
Reduce Degradation on MIC Line
– Support Control Signals used In
Manufacturing (JIG, BOOT)
• ESD Performance Tested Per JESD 22
– 4000-V Human-Body Model (A114-B, Class
II)
– 1500-V Charged-Device Model (C101)
• IEC ESD Performance
– ±8 kV Contact Discharge (IEC 61000-4-2) for
VBUS/DP/DM/ID to GND

APPLICATIONS
• Cell Phones and Smart Phones
• Tablet PCs
• Digital Cameras and Camcorders
• GPS Navigation Systems
• Micro USB Interface with USB/UART/AUDIO

DESCRIPTION
TSU6721 is a high performance USB port multimedia switch featuring automatic switching and accessory
detection. The device connects a common USB port to pass audio, USB data, charging, On The Go (OTG) and
factory mode signals. The audio path has negative signal capability includes left (mono/stereo), right (stereo) as
well as microphone signals. Furthermore, TSU6721 is compatible with the MCPC specification.
TSU6721 features impedance detection which supports the detection of various accessories that are attached
through DP, DM and ID pins of the USB connector. The switch is controlled by automatic switching or manually
through I2C.
TSU6721 has an integrated low resistive Load Switch that is used to isolate the charger from the external
connector. OverVoltage Protection and programmable OverCurrent Limiter/Protection are additional features
included to the Load Switch.
The charger detection satisfies USB charger specification v1.2. In addition to DCP, CDP and SDP, the device
also detects Apple Chargers.
Power for this device is supplied through VBAT of the system or through VBUS when attached. TSU6721
supports factory mode testing when a USB/UART JIG cable is used in development and manufacturing.