The ASTX-12 from Abracon LLC is a TCVCXO with Frequency 13 to 52 MHz, Supply Voltage 1.8 to 3.0 V, Current 2 to 2.5 mA, Phase Noise -135 to -125 dBc/Hz @ 1 KHz, -150 to -140 dBc/Hz @ 10 KHz, Phase Noise 1 kHz -135 to -125 dBc/Hz @ 1 KHz. Tags: Surface Mount. More details for ASTX-12 can be seen below.