型号:SN74HC4AN
SN74HC51N
SN74HC540ADB
SN74HC540ADBE4
SN74HC540ADBG4
SN74HC540AN
SN74HC540ANE4
SN74HC540ANS
SN74HC540ANSE4
SN74HC540ANSG4
SN74HC540ANSR
SN74HC540ANSRE4
SN74HC540ANSRG4
SN74HC540APW
SN74HC540APWE4
SN74HC540APWG4
SN74HC540APWR
SN74HC540APWRE4
SN74HC540APWRG4
SN74HC540DB
SN74HC540DBE4
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