The SKY73134-11 is a wideband integer-N frequency synthesizer with an approximately 6 GHz locking range. The device includes four differential VCOs, which cover the output frequency range from 2.8 GHz to 6.2 GHz. By applying internal VCO division by 1, 2, 3, 4, or 8, the output frequency range can be increased from 0.35 GHz to 6.2 GHz, monitored at the RF output. The direct, non-divided internal VCO frequency can also be monitored at the bidirectional VCO pins. The VCO selection can be automatic, based on the target RF output. The flexible SKY73134-11 configuration allows the loop to be locked by an external VCO or external PLL, or the device can use the divider chain only. The SKY73134-11 is controlled by a bidirectional read/write serial to parallel interface.