This is one piece of New RFMD/Sirenza VCO, 851MHZ to 877MHZ, Part Number: VCO191-864UY in U Package (0.374"x0.374"x0.130"). RoHS.

General Spec:

• Frequency Range: 851MHz to 877MHz;
• Phase Noise: -108dBc/HZ at 10KHz offset;
• Tuning Voltage: 0.4V to 2.6V;
• Tuning Sensitivity: 18MHz (avg);
• Output Power: -3dBm;
• Load Impedance: 50 Ohms;
• Load Capacitance: 100pF;
• Pushing: < 0.7MHz/V;
• Pulling: < 0.9MHz (12dB return Loss);
• Operating Temp: -35C to +85C;
• Supply Voltage: 3V/6mA;
• Package: U (0.374"x0.374"x0.130");

Data Sheet:

http://rfbayinc.com/upload/files/data_sheet/vco/vco191-864uy.pdf

U Package:

http://www.rfmd.com/CS/Documents/VCO191-1960U(Y)_PackageSPACEDrawing.pdf