The 500 Series from MTI-Milliren Technologies is a VCXO with Frequency 64 KHz to 160 MHz, Frequency Stability ±0.5 ppm, Phase Noise -140 to -125 dBc/Hz, Phase Noise 1 kHz -125 dBc/Hz, Phase Noise 10 kHz -140 dBc/Hz. Tags: Surface Mount. More details for 500 Series can be seen below.