DST310S 32.768KHZ 12.5PF 20PPM DST310S 32.768KHZ 7P DST310S(32.768KHZ) DST310S32.768K DST310S32.768KHZ DST310S-32.768KHZ DST310S-32.768KHZ 9PF DST310S-32.768KHZ 12.5PF DST310S-32.768KHZ 9PF DST310S-32.768KHZ-20PPM