FSA8058 Datasheet, PDF (1/8 Pages) Fairchild Semiconductor – Audio Jack Detection and Configuration Switch with Moisture Sensing

July 2013
FSA8058
Audio Jack Detection and Configuration Switch with
Moisture Sensing
Features
Detection
Switch Type
V_DD
V_IO
THD (MIC)
ESD (Air Gap)
Operating
Temperature
Package
Top Mark
Ordering Information
Accessory Plug-In
3-Pole or 4-Pole Audio Jack
Send/End Key Pressed
Moisture
MIC
2.5 V to 4.5 V
1.6 to V_DD
0.01% Typical
15 kV
-40°C to 85°C
10-Lead UMLP, 1.4 mm ×
1.8 mm × 0.5 mm, 0.4 mm Pitch
FSA8058
NC
FSA8058UMX
Applications
 3.5 mm and 2.5 mm Audio Jacks
 Cellular Phones, Smart Phones
 MP3 and PMP
Description
The FSA8058 is an audio jack detection switch for
3-pole and 4-pole accessories. The FSA8058 features
moisture sensing, which prevents false positive
detection of accessories in the audio jack. The FSA8058
also features an integrated MIC switch that allows a
processor to configure attached accessories. The
architecture is designed to allow common third-party
headphones to be used for listening to music from
mobile handsets, personal media players, and portable
peripheral devices.
 Prevents False Detection of Accessories in the Audio
Jack when Moisture is Present
 Removes Audio Jack Pop and Click Caused by
MIC Bias
 Detects Audio Jack Accessories:
- Standard Headphones
- Send / End Button Presses
 Integrates a MIC Switch for 4-Pole Configuration
Related Resources
 FSA8058 Evaluation Board
 For samples and questions, please contact:
[e-mail]
GPIO Interface
Baseband
FSA8058
Logic
Insert and
Moisture
Detection
Jack Detect
Audio Jack
CODEC
MIC
© 2012 Fairchild Semiconductor Corporation
FSA8058 • Rev. 1.0.0
Key Detection
Figure 1. System Diagram
MIC- Send/End Key
www.fairchildsemi.com