silicon protection arrays ?2009 littelfuse, inc 15 application guide lvds (low voltage differential signaling) considerations: lvds is a low noise, low-voltage signal scheme that uses a small current (typically 3.5ma) to generate a voltage drop across a 100 ? resistor to convey information or data data rates can vary per application but the ansi/tia/eia-644-a standard recommends a maximum of 655mbps. the medium/high speed bus requires a low c apacitance device in 1-6pf range (typically) lvds schemes will vary in terms of the total number of channels used protection of 8 data lines is shown below (i.e. clk+/clk- and ax+/ax- ) application schematic: recommended spa devices: ordering number esd level (contact) lightning (t p =8/20 s) i/o capacitance # of channels v rwm packaging SP4060-08ATG 30kv 20a 4.4pf 8 2.5v msop-10 sp3050-04htg 20kv 10a 2.4pf 4 6v sot23-6 lvds controller outside world clk+ case gnd lvds interface clk- a0+ a0- a1+ a1- a2+ a2- signal g nd case gnd sp4060 ic
|
