DSB221SDM16.800MHZ DSB221SDM26.000MHZ DSB221SDM33.600MHZ DSB221SDN DSB221SDN 1XXB26000MAA DSB221SDN 26.000MHZ DSB221SDN 26M DSB221SDN 26MHZ (1XXB26000MAA) DSB221SDN 38.400MHz 3.3V 0.5PPM DSB221SDN 38.400MHZ 3.3V 0.5PPM(-30~85)