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型號 / 廠家，封裝，批號，備注，訂購
SN74LS21NSRE4 / Texas Instruments,Datasheet,07+,Dual 4-input Positiv 訂購 PDF文檔
SN74LS21P / MIT,,08/09+,特價 訂購 PDF文檔
SN74LS221DBR / ,,08/09+,全新原裝深圳庫存 訂購 PDF文檔
SN74LS221DBRE4 / Texas Instruments,Datasheet,06/07+,DUAL MONOSTABLE MULT 訂購 PDF文檔
SN74LS221DE4 / Texas Instruments,Datasheet,07+,DUAL MONOSTABLE MULT 訂購 PDF文檔
SN74LS221DR / TI,3.9m,08/09+,全新原裝 訂購 PDF文檔
SN74LS221DR2 / MOTOROLA,,08/09+,全新原裝深圳庫存 訂購 PDF文檔
SN74LS221DRE4 / Texas Instruments,Datasheet,07+,DUAL MONOSTABLE MULT 訂購 PDF文檔