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home >> Switches >> Audio Switches
Audio Switches   
   
 
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Overview

Fairchild's audio switches offer various levels of On Resistance ( as low as 0.35ohms), small scale packaging ( as small as 1.45mm sqd) and are available in the most common switch configurations. All are designed to minimize THD, leakage current and crosstalk while maximizing ESD and Off Isolation.

The Low Icct switches allow the control pin(s) to have a lower voltage swing on its input, while minimizing power consumption. As a result, low Icct switches optimize battery life.

Products: Audio Switches

What's New
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Featured Products


Part # Configuration Low ICCT

On Resistance
(RON) Ohm

 Supply Voltage
Range (VCC)		 Bandwidth
(MHz)		 CON (pF) Package
FSA201 Double pole, double throw switch X 3.0 1.65V-5.5V 400 29 10 leaf MSOP
FSA201 Double pole, double throw switch X 1.0 1.65V-5.5V 400 25 10 lead micropak
FSA3259 2X SPST X 9.0 1.65V-5.5V 250 14.5 SC70, MicroPak
FSA2156 1X SPST X 0.7 1.65V-5.5V 80 115 DQFN
FSA2257 2x SPDT   0.95 1.65V - 5.5V 350 40 MicroPakTM 10, TSSOP 14
FSA2267 2x SPDT   0.35 1.65V - 3.6V 45 126 MicroPakTM 10
FSA2267A 2x SPDT X 0.35 2.3V - 4.3V 45 126 MicroPakTM 10
FSA2467 2x DPDT X 0.40 1.65V - 4.3V 85 118 MLP 16, TSSOP 16
FSA3157 /
FSAU3157		 1x SPDT   5.0 1.65V - 5.5V 250 19 SC70, MicroPakTM 6
FSA4157 1x SPDT   0.95 1.65V - 5.5V 350 40 SC70, MicroPakTM 6
FSA4157A 1x SPDT X 0.95 1.65V - 5.5V 350 40 SC70, MicroPakTM 6
FSA5157 1x SPDT X 0.40 2.3V - 4.3V 50 6 SC70, MicroPakTM 6
FSA2268 2X SPDT X 0.4 1.65V-4.3V 50 120 UMLP
FSA2269 2XSPDT X 0.4 1.65V-4.3V 50 120 UMLP,Micropak
FSA2269TS 2XSPDT X 0.4 1.65V-4.3V 50 120 UMLP, Micropak
FSA2270 2XSPDT X 0.4 1.65V-4.3V 50 120 UMLP
FSA2271 2XSPDT X 0.4 1.65V-4.3V 50 120 UMLP
FSA2367 3XSPDT X 0.75 2.7V-4.3V 150 55 DQFN, TSSOP
FSA2380 SPDT X 1 1.65V-5.5V 100 41 SC70
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Collateral and Literature


Analog Switch Guide   Switch Selection Guide   2x SPDT Audio Flyer
Analog Switch Guide   Switch Selection Guide   2x SPDT Audio Flyer
English | Simplified Chinese   English | Simplified Chinese   English | Simplified Chinese
         
    1x SPDT Audio Flyer    
    1x SPDT Audio Flyer    
    English    
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Application Notes


Application Note   Description 
AN-6019 ESD Test Methodology Overview
AN-5064 Low-ICCT Analog Switches for Ultra-Portable Designs
AN-5064-SC Simplified Chinese - 满足便携设计的低漏电流模拟开关
AN-5064-TC Traditional Chinese - 滿足便攜設計的低漏電流模擬開關
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Sample Application Diagrams


The FSA4157 is well suited for sharing single ended audio or other signals which require low On Resistance. The FSA4157 is well suited for sharing single ended audio or other signals which require low On Resistance.
 
The FSA4157A includes our low Icct Circuitry which allows for direct interface with low voltage ASICS. (see App Note 5064) The FSA4157A includes our low Icct Circuitry which allows for direct interface with low voltage ASICS. (see App Note 5064)
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Frequently Asked Questions

Find more answers in our Question and Answers Section

1. What are the key parameters to consider when selecting an audio switch?
A. THD (total harmonic distortion) , On resistance, Ron flatness are the key features of Fairchild audio switches.

2. What is the difference between ‘A’ and ‘non-A’ audio switches?
A. The ‘A’ designator for the audio switches specifies the “Low-Icct” feature. This feature allows the control buffer input to be sourced by a lower Vcc GPIO with minimal impact in current consumption. This in turn extends battery life. (for additional information, please read applications note An-5064)

3. Can I switch a negative signal through my Audio switch?
A. Yes, Fairchild Semiconductor offers several audio switches with negative swing capabilities, the FSA2269TS, FSA2270T, FSA2271T, FSA2367, and the FSA2380.

4. Fairchild specifies a very high ESD rating on their audio switches, how are these values derived?
A. We test all switches to both the Human Body Model (HDM) and Charged Device Model (CDM) as outlined in the JEDEC standards JESD22- A114C-01 and JESD22-C101C respectively. Many switches also have specifications for Machine Model (MM). In addition, our ESD values specified are for contact rather than air discharge which also demonstrates a superior performance. Fairchild Semiconductor has leading edge technology to provide extremely robust ESD protection within our switches.  Many Fairchild Semiconductor switches have HBM contact ESD as high as 7-8kV contact.

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