型号 QT49-10.500MBBK-B 制造商 TXC 分类 Crystals RoHS 数据表 QT49-10.500MBBK-B 描述 Crystals HC49 Through Hole MHz Quartz Xtal / Metal, +/-50ppm @25C, +/-50ppm (-20 to 70C), 20pF