n-b-a：
Anyway,sincenooneanswerthisquestion,Iamgonnaattachsomemoreinfo.whichIjustfoundfromweb.1.Normally,3yrsguaranteeshelflife.2.Storagecondition,30Deg.C/60RH.3.Referencedocumentasfollowing:http://www.dalsasemi.com/foundry/storageinfo.asphttp://quality.zarlink.com/ppp_info/shelf_life.htmFYI.