▁functions ▁in ▁its ▁S AN ▁switch es . ▁ ▁The ▁first ▁family ▁of ▁S AN ▁switch es , ▁the ▁Sil k W orm ▁ 1 0 0 0 , ▁released ▁in ▁ 1 9 9 7 , ▁were ▁based ▁on ▁the ▁first ▁generation ▁of ▁Bro cade ▁AS IC s , ▁called ▁St itch . ▁ ▁The ▁Sil k W orm ▁ 6 4 0 0 ▁series ▁of ▁S AN ▁Director ▁class ▁switch es ▁and ▁Sil k W orm ▁ 2 4 0 0 / 2 8 0 0 ▁switch es , ▁released ▁in ▁ 1 9 9 9 , ▁were ▁based ▁on ▁the ▁second ▁generation ▁of ▁Bro cade ▁AS IC s , ▁called ▁LO OM . ▁ ▁The ▁Sil k W orm ▁ 1 2 0 0 0 / 2 4 0 0 0 ▁S AN ▁Direct ors ▁and ▁Sil k W orm ▁ 3 2 0 0 / 3 8 0 0 / 3 8 5 0 ▁S AN ▁switch es , ▁released ▁in ▁ 2 0 0 1 , ▁were ▁based ▁on ▁the ▁third ▁and ▁fourth ▁generation ▁of ▁Bro cade ▁AS IC s ▁called ▁B LO OM ▁and ▁B LO OM - II . ▁ ▁The ▁fifth ▁generation ▁of ▁AS IC s , ▁called ▁Cond or ▁and ▁Golden ey e ▁( scale d - down ▁Cond or ), ▁power ed ▁the ▁Sil k W orm ▁ 4 8 0 0 0 ▁series ▁of ▁Direct ors ▁and ▁port ▁bl ades , ▁FR 4 - 1 8 i ▁Ext ension ▁Bla de ,