The TX-EL from Transko Electronics Inc is a TCXO with Frequency 750 KHz to 800 MHz, Supply Voltage 3.3 to 5.0 V, Current 25 to 100 mA, Output Load 50 to 100 Ohms, Phase Noise -145 to -80 dBc/Hz. Tags: Surface Mount. More details for TX-EL can be seen below.