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SN74LVC240AD 244 245 373 374 540 541 573 574ADW 2244ADWR SOP
AD1838AS SN74LVC240APWRG4 HD64F2692RFC20I SN15849N MC34118DW
原SN74LVC125AD MC74HC240A MC74HCU04N SN74LS174N
贴片直插SN74LVC1G240 SN74LVC157AD SN74LVC1G126 4
