FC-12M 32.768K EPSON 晶体 FC-12M 32.768K-60NN90KCX FC-12M 32.768KHZ FC-12M 32.768KHZ 9/20 FC-12M 32.768KHZ 9PF FC-12M 32.768KHZ IC FC-12M 32.768KHZ-12.5 FC-12M 32.768khz-12.5pF FC-12M 32K-77.5K FC-12M/32.768KHZ/12.5PF/20PPM