The VCO1388ULN from Dynamic Engineers is a Voltage Controlled Oscillator with Frequency 3625 MHz, Tuning Sensitivity 5 MHz/V, Tuning Voltage 0.5 to 4.5 V, Phase Noise dBc/Hz @10kHz -120 dBc/Hz, Supply Voltage 8 V. Tags: Surface Mount. More details for VCO1388ULN can be seen below.