FSA8029 Datasheet, PDF (1/3 Pages) Fairchild Semiconductor – Audio Jack Send / End Detection with MIC / Video Switch

March 2012
FSA8029
Audio Jack Send / End Detection with MIC / Video Switch
Features
Detection
Switch Type
V_DD
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
Microphone & Video
2.5 to 4.3V
0.01% Typical
16kV
-40°C to 85°C
10-Lead UMLP
1.4x1.8x0.5mm, 0.4mm Pitch
KS
FSA8029UMX
Applications
 3.5mm and 2.5mm Audio Jacks
 Cellular Phones, Smartphones
 MP3 and PMP
Description
The FSA8029 is an audio jack microphone / video switch for
3- or 4-pole accessories with send / end (S/E) detection. In
addition to detection, the FSA8029 features an integrated
microphone / video 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 when Send / End Button Key is Pressed
 Integrates a MIC / Video Switch for 4-Pole Configuration
 Reduces Pop / Click Caused by Microphone Bias
Related Resources
 For samples and questions, please contact:
[e-mail].
 FSA8029 Demonstration Board
Typical Application
Baseband
Processor
GPIO
VIO VIO
VIO
2.8V
VDD
R_VDD
GPIO1
GPIO2
GPIO3
Open Drain Output _S/E1
Open Drain Output _S/E2
TTL Level Input _SEL
Audio
CODEC
MIC Bias
R_MIC
MIC
L SPKR
C_MIC
MIC
VID
R SPKR
Enable
GND
REF
+
-
+
-
0.07x
VDD
J_MIC
1 234
L R GND MIC
Applications
Processor
Video Out
© 2010 Fairchild Semiconductor Corporation
FSA8029 • Rev. 1.0.1
Figure 1. Mobile Phone Example
www.fairchildsemi.com