SN74LS19ANSMAX8212MJAMX7534KNCA3045F¥200去看看永恒电子元器件发布了原CA3045F SN74LS19ANS MX7534KN MAX8212MJASN74HCT373DSN74LS19ANSSN74LV139ADSN74LS244NS¥40去看看宇豪正品原装店发布了新SN74LS244NS SN74LV139AD SN74LS19ANS SN74HCT373D R