FSA8108 Series

Audio Jack Detection and Configuration Switch, Supports Volume Up/Down & Send/End Keys

Catalog

Audio Jack Detection and Configuration Switch, Supports Volume Up/Down & Send/End Keys

Part	Mounting Type	Package / Case	Voltage - Supply [Max]	Voltage - Supply [Min]	Applications	Supplier Device Package	Interface
ON Semiconductor FSA8108BUCX	Surface Mount	12-UFBGA WLCSP	4.5 V	2.7 V	Cell Phone	12-WLCSP (1.16x1.56)	I2C

Catalog

Audio Jack Detection and Configuration Switch, Supports Volume Up/Down & Send/End Keys

Key Features

• Detection:

• Audio Plug Connection

• Volume Up/Down Key Press

• Send/End Key Press

• VDD: 2.7 to 4.5V

• VIO: 1.6V to VDD

• THD (MIC): 0.01% Typical

• LDO Output for MIC Bias Voltage: 2.4V

• ESD (IEC 61000-4-2): 15kV

• Operating Temperature: -40°C to 85°C

• Package: 12-Ball WLCSP

• Top Mark: G6

• Ordering Information: FSA8108BUCX

Description

The FSA8108 is an audio jack detection switch for 3- or 4-pole accessories that detects the audio plug connection. The detection circuit monitors the microphone bias voltage to detect a volume up/down or send/end key press. For system flexibility, the FSA8108 features an I2C port with registers to allow programmability of AC timing specifications.￭ Detects 3- or 4-Pole Audio Accessories￭ Removes Audio Jack Pop-and-Click Caused by MIC Bias￭ Detects Key Press: Volume Up/Down, Send/End￭ Stuck Send/End Key Recovery￭ LDO Output for MIC Bias Voltage