MK5814G

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The MK5814G is a multi-phase clock generator used for multiple standard and custom frequency sources. Building on its predecessor, the MK5814E, it offers improved accuracy and frequency stability. It also provides support for multiple outputs, including LVPECL, LVDS, SSTL and more. It offers a range of frequencies up to 160 MHz, and is well-suited for applications where sub-100MHz frequencies are the order of the day.

The MK5814G offers an adjustable spread-spectrum output or a fixed-frequency output. Spread-spectrum operation is chosen when a given system must operate within a certain range while attempting to reduce Electro-magnetic interference (EMI). This helps reduce the level of EMI present in the system. The Fixed-frequency output is obviously fixed, providing deterministic output frequencies when necessary.

The MK5814G extends beyond the traditional TCXO-based frequency sources. It boasts an Auto-calibration circuitry, where an embedded control algorithm can be used for calculating and applying trim modifications to the main VCXO and determining the best operating temperature range. This allows the MK5814G to reduce the effects of aging and temperature drift, optimizing all measured metrics over the unit’s lifetime.

At its core, the MK5814G works by generating a reference clock and then using this clock to create a divide-by-N frequency source. The reference clock can be generated using either a crystal oscillator for stability or a free-running VCXO, allowing for external control and exact frequency output. The reference clock is fed into the PLL, which generates a frequency defined by the reference clock and feedback divider values. The feedback divider values can then be modified depending on the need of the system.

The divide-by-N frequency source is adjustable, meaning that any desired external frequency can be generated. This flexibility is crucial for applications such as networking or cell phones, where the desired frequency range may change frequently. Internal clock selections can also be made which are optimized for electromechanical and digital use cases.

The MK5814G provides many more features than just a frequency source, such as power management, temperature monitoring, and system monitoring. It also provides a variety of external interface connections. It is designed to be a complete turn-key solution for clock generator needs, allowing for a wide range of clock/timing-related applications.

In conclusion, the MK5814G is a multi-phase clock generator that supports a range of frequencies up to 160 MHz. It offers adjustable spread-spectrum output or a fixed-frequency output and boasts an auto-calibration circuitry to reduce the effects of aging and temperature drift. Beyond the traditional TCXO-based clock sources, the MK5814G offers internal clock choices and an array of interface connections. It is a complete turn-key solution for clock generators and other clock/timing-related applications.

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