These sockets have a double row of Beryllium Copper contacts on 1mm (.0394”) pitch to provide the ultimate solution for many micro card interfaces. They mate with (160mm) .0625” cards.
Eight standard sizes are available with a choice of 5, 8, 20, 30, 39, 49, 58 and 68 I/Os per side. The largest vertical design has a total of 136 I/Os in less than one square inch (645 square mm) of PCB area while the right angle design requires approximately 1.35 square inches (870 square mm). The edgemount design requires less than 3/8 of a square inch (330 square mm) on each side of the board.
Sockets are normally polarized to provide error free mating; however, smaller sizes with up to 30 contacts per side may be specified with or without polarization to maximize I/O density. Polarization I these smaller sizes requires the loss of one I/O per side.
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