FSA8008A Datasheet, PDF (1/3 Pages) Fairchild Semiconductor – Audio Jack Detection and Configuration Switch

March 2011
FSA8008/FSA8008A
Audio Jack Detection and Configuration Switch
Features
Detection
Functionality
Switch Type
V_DD
V_IO
THD (MIC)
ESD (Air Gap)
Operating Temperature
Package
Top Mark
Ordering Information
Accessory Plug-In
3- or 4-Pole Audio Jack
Send/End Key Pressed
FSA8008
Decreased Timing
FSA8008A for Sensitive
Send/End Keys
MIC
2.5 to 4.4V
1.6 to V_DD
0.01% Typical
15kV
-40°C to 85°C
10-Lead UMLP
1.4x1.8x0.5mm, 0.4mm Pitch
FSA8008
KC
FSA8008A
KD
FSA8008UMX
FSA8008AUMX
Applications
 3.5mm and 2.5mm Audio Jacks
 Cellular Phones, Smartphones
 MP3 and PMP
Typical Application
Description
The FSA8008/FSA8008A is an audio jack detector and
switch for 3- or 4-pole accessories. In addition to detection,
the FSA8008/FSA8008A features an integrated MIC switch
that allows the processor to configure the audio jack. 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.
 Determines 3- or 4-Pole Audio Jacks
 Removes Audio Jack Pop-n-Click Caused by MIC Bias
 Detects Audio Jack Accessories:
- Standard Headphones
- Headsets with MIC
- Send / End Button Presses
 Integrates a MIC Switch for 4-Pole Configuration
Related Resources
 FSA8008/FSA8008A Demonstration Board
 For samples and questions, please contact:
[e-mail].
© 2011 Fairchild Semiconductor Corporation
FSA8008 / FSA8008A • Rev. 1.0.3
Figure 1. Mobile Phone Example
www.fairchildsemi.com