DSA321SCM13.000MHZ DSA321SCM19.200MHZ DSA321SCM20.000MHZ DSA321SCM26.000MHZ DSA321SCM38.400MHZ DSA321SCM40.000MHZ DSA321SCM52.000MHZ DSA321SD 19.2M TCXO DSA321SDA DSA321SDA 10MHz 3.3V 0.5PPM