General Description

The FSA4485 is a high performance USB Type−C port multimedia

switch to supports analog audio headsets. The FSA4485 allows

sharing of the USB Type−C port to pass USB2.0 signals, analog audio,

sideband use signals, and analog microphone signal. For enhanced

audio performance the FSA4485 incorporates MOSFET gate drivers

to support low resistance external analog ground switches. The

FSA4485 features Over Voltage Protection on all connector facing

pins as well as Over Current Protection for the analog ground switch.

Features

• VCC Range from 2.7 V to 5.5 V (Primary)

• OVP Function on Common Node Pins

• Over Current Protection for Analog Ground Switch

• Analog Audio Device Unplug Detection

• 16 V DC Tolerance on Connector Side Pins:

DP_R, DN_L, GBSUx, SBUx

• 20 V DC Tolerance on CC_IN

• High Performance Audio/USB SW:

♦ Audio SW, THD+N < −109 dB; 1 VRMS, 32  Load;

♦ USB SW, BW: 1 GHz

• 225 m (Typical) Sense to GSBUx on Resistance

• 78 m (Typical) SBUx to AGND on Resistance

• Programmable Gate Drive for Optional External SBUx to AGND

Switch

• 1.2 V Capable I2C Interface

• Two I2C Addresses

• Optional Normally Closed Configuration for SBU Data Switch to

Support Factory Test

• Moisture/Resistance Detection on DP_R, DN_L and SBUx

Applications

• Mobile Phone

• Tablet

• Notebook PC

• Media Player