FSA8008 Product brief and Sales guide Oct. 21 2010 Switch&Interface

3.5mm Audio Jack in Cell phone Designs Growth trend for Cell phone provides to use these two connectors as the only physical interface 2

Current Design Challenges Leakage current >500uA when MIC is Plugged in Pop noise When 3 pole(L/R/GND) headphone jack is attached at Vmic_bias turned on, L or R of Jack touches Vmic_bias first, it triggers Pop noise Ground MIC Ground

Design Challenges - Continued Sensing Audio jack insertion While Send/End Key is being pressed or when S/E key is stuck, phone only detects a 3 pole jack and does not recover to a 4 pole jack Accidental re-dialing with plugging in headset while stuck Send/End Key pressed Software work around to resolve Audio Pop and Stuck S/E key issue What happens when this button is pressed while insertion ? 4 pole Audio Jack MIC or Send/End key

Fairchild Solution: Headset Detection & Configuration Switch FSA8008: Headset detection & Configuration Switch FEATURES One chip solution for 3- or 4-pole audio jack detection Provides Send / End key detection & communication Eliminates Pop &Click noise No Leakage current No Software work around needed for stuck button recovery Space Saving Package 1.4mm x 1.8mm 10ld UMLP FSA9280A Cell Phone Main Board Baseand or MAP GPIO 3-pole Jack MIC Bias PMIC 4-pole Jack /w Send /End key FSA8008 Audio Codec L R Mic 5

Send / End Key Communication MIC or GND or Send / End Key Headset detection and configuration Switch – FSA8008 Features Detection: Insertion of 3- or 4-pole headset Pressing of Send/End key Switch type : MIC (Single Comparator , Normally Open) VDD : 2.5V ~ 4.4V VDD : VIO : 1.6V to VDD THD : 0.01% typical ESD : 12kV HBM, 15kV IEC Production Now Baseband Processor GPIO1 J_DET PMIC MIC BIAS Audio CODEC MIC L R GPIO2 J_MIC GPIO3 GPIO4 FSA8008 Detection & Communication Detection & Send / End Key Communication MIC or GND or Send / End Key 8 5 4 3 2 9 1 6 7 10-Lead UMLP (1.4mm x 1.8mm) 3 4

Value Added 10~ 15% Cost saving is expected Total 11.76mm2 Total Size FET for detection 2.56mm2 (1.6mm x 1.6mm) Dual SPDT 3mm2 (3mm x 1mm) Comparator 1.2mm2 (1.2mm x 1mm) Passive components (R,C) 5mm2 (1005 size 8 ∼10EA) Total 11.76mm2 70% Save Size FSA8008 2.52mm2 (1.4mm x 1.8mm) Capacitor on power supply 1mm2 (1005 size 2EA) Total 3.52mm2 10~ 15% Cost saving is expected

Other Audio Jack Detection Switches Fairchild Audio Jack Detection Switches provide single chip solutions for 3- & 4-pole audio jack applications Key Advantages: Reduced power consumption Send/End key detection & communication Eliminates Pop-n-click noise Detects multiple headset types On-chip accessory detection (FSA8008) Single and dual comparator solutions 71% PCB space reduction vs. discrete solution Audio Jack Detection Switch Selection Table

Sales guide and Product Positioning Eliminate customer pain, save board space, and reduce BOM in a cost-leadership position. Background : Audio jack detection is a brand new category in an emerging application at top-tier cell phone customers. The FSA8008 is designed to detect 3-pole or 4-pole ear jack s with Send/End key, and is the first 3.5mm audio jack product to integrate a comparator, analog switch, and FET. FSC will continue to develop new products that integrate additional circuitry around the audio jack, and is willing to work with any specific customer to consider integrating their particular requirements for this application into a new product. Secondary target application : Netbook, Tablet, Notebook – which are starting to use single audio/mic sockets that need to detect insertion of 3- or 4-pole jacks Competitors: Design support : Demo board is available MAX14565 I2C interface, Headset Detection, single SPDT(Video/MIC) FSA8008 GPIO interface, Headset detection(SPST MIC Switch) MAX14579 GPIO interface, Headset Detection, single SPDT(Video/MIC), Samples in Nov. 2010 FSA8029 Dual comparator w/ single SPDT(Video/MIC) MAX4855 Dual SPDT with Dual Comparator FSA8009 Single Comparator w/ single SPDT(Video/MIC)