全新SN74HC4040PW SN74HC4040NS SN74HC4040DW SN74HC4040DR
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SN74HC4040DW 全新二进制计数器芯片 直插SOP-16 计数器/分频器
SN74HC377DW SN74HC4040N SN74HC4060D SN74HC4852D SN74HC540DW
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