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封装SN74LS136SN74HC164芯片
栅极逆变器HD74LS290PSN74LS290N
74LS28N74LS28374LS28P74LS290
74LS285AB74LS290PC74LS293PC74LS295BN
74LS283N74LS280P74LS283P74LS28PC
SN74LS290N293295299
147芯片SN74LS5574LS14
十进制计数器HD74LS290PSN74LS290N
栅极直拍逆变器SN74LS290N
SN74LS279N芯片逻辑74LS280
SN74LS136SN74LS164芯片SN74LS74
栅极逆变器SN74LS290NHD74LS290P
封装SN74HC164SN74LS136芯片
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