The XLL538C00.000000X is based on a direct-conversion architecture that uses the same basic structure as a CMOS inverter. The clock signal is generated by passing the input frequency through a series of logic gates which are arranged in a loop. The logic gates are connected to a voltage-controlled oscillator to produce the output signal. The output signal is then passed through a low-pass filter and buffered before being output to the user.

The XLL538C00.000000X has the ability to slew the output frequency of the oscillator with a selectable step size. This allows the device to be used to generate a range of frequency sweeps, which can be used for testing equipment, systems, and other applications. Additionally, the device has an adjustable frequency lockout feature, allowing the user to limit the frequency range of the generated signal. This is especially useful when attempting to limit the power consumption of the device.