The QTCV576HC from Q-Tech Corporation is a VCXO with Frequency 1.544 to 125 MHz, Frequency Stability ±30 ppm, ±50 ppm, ±100 ppm, Supply Voltage 5 V, Tuning Voltage 0.5 to 4.5 V, Current 18 to 50 mA. Tags: Surface Mount. More details for QTCV576HC can be seen below.