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序号 型号 描述 大小 厂家Logo 下载
1 CD74HC221PWTE4 High-Speed CMOS Logic Dual Monostable Multivibrator with Reset 460K TI 2015099
2 CD74HC221PWTE4 High-Speed CMOS Logic Dual Monostable Multivibrator with Reset 681K TI 2015098