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AD1838AS SN74LVC240APWRG4 HD64F2692RFC20I SN15849N MC34118DW
SN74HC02APWR SN74HC541PWR SN74HCT240DWR SN74LVC00AD
SN74LVC240AD2442453733745
SN74LVC240AD 244 245 373 374 540 541 573 574ADW 2244ADWR SOP