The ECXV-P37C2M-666.5143 from ECS Inc. International is a VCXO with Frequency 666.5143 MHz, Frequency Stability ±25 ppm, Supply Voltage 3.3 V, Current 68 mA, Pulling ±90 ppm. Tags: Surface Mount. More details for ECXV-P37C2M-666.5143 can be seen below.