silicon protection arrays ?2009 littelfuse, inc 16 application guide audio (speaker/microphone) considerations: audio ports typically have signals that swing above and below gnd (i.e. 2.5v) if no bias is applied, a bidirectional protection device should be used these devices will not clip the analog signal as they only conduct or turn on above 6v protection of 2 data lines is shown below (i.e. left and right ) some audio ports will bias the data bus so that the signal never swings below gnd (i.e. 0-5v) if a bias is applied, a unidirectional or bidirectional pr otection device could be used as neither device would clip the analog signal the SP1001-02XTG is a good option in this case (not shown for left and right but is listed below) application schematic: recommended spa devices: ordering number esd level (contact) lightning (t p =8/20 s) i/o capacitance # of channels v rwm packaging sp1002-02jtg 8kv 2a 5pf 2 6v sc70-5 sp1002-01jtg 8kv 2a 5pf 1 6v sc70-3 SP1001-02XTG 8kv 2a 8pf 2 6v sot553 audio codec outside world left audio port right ic case gnd sp1002-02
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