silicon protection arrays ?2009 littelfuse, inc 19 application guide sim socket considerations: the sim (subscriber identification module) card ha s 3 data lines that are low-speed and low-voltage given the low speed of the signals, the capacita nce will not be a concern the low-voltage signal lines are best protected by a device which has a low standoff voltage or v rwm this allows the protection to turn on ?earlier? in response to an over-voltage or esd event protection of the 3 data lines is shown below (i.e. clk, data, and reset ) application schematics: recommended spa devices: ordering number esd level (contact) lightning (t p =8/20 s) i/o capacitance # of channels v rwm packaging SP4001-04UTG 12kv 4.5a 0.75pf 4 3.3v dfn-6 (1.6x1.6mm) sp3002-04utg 12kv 4.5a 0.85pf 4 6v dfn-6 (1.6x1.6mm) signal gnd sim controller sim socket v bus data clk reset gnd sp4001 outside world case gnd ic case gnd *package is shown as transparent nc nc nc
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