2520 16M 9PF 10PPM 2520 16M 9PF X-TAL 2520 16M OSC 2520 18.432M 10PF 2520 18.432MHZ 2520 19.2M 2520 19.2M 7PF 2520 19.2M NDK 2520 19.2M OSC 2520 19.2MHZ 7pf 10ppm