MK9173-15CS08LF

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The MK9173-15CS08LF is a clock generator, phase locked loop (PLL), and frequency synthesizer utilized in various applications to ensure better clock signal precision and power-efficiency. The circuit is designed for 1:8, 2:16, and 4:32 post-division, and provides 14/15 differential clock outputs supporting both 2.5V and 1.8V clocks. Through accurate control of on-chip frequency synthesizers, the clock generator can generate low-phase-noise clock signals in various frequency ranges.

The working principle of the MK9173-15CS08LF is based on two digital PLLs and two analog PLLs. The MK9173-15CS08LF master clock input uses a 25MHz oscillator, divided by 373 to produce a limit frequency of 67kHz. This limit frequency is then divided by 16 to achieve the base frequency of 4.2kHz, which is used by the two digital PLLs. The first digital PLL operates in force group pull-in (FGP) mode. Its output frequency is determined by the numerical values loaded into two registers, the Control Word Frequency (CWF) and the VCO Divider (VCD). The second digital PLL operates in spread spectrum mode and its output frequency is determined by the value loaded into the Spread Spectrum Frequency (SSF). The two analog PLLs work together to ensure better signal precision, providing four output frequencies.

The clock generator produces 14 or 15 differential clock outputs, depending on the configuration. All outputs have an adjustable duty cycle in the range of 47%-53% and the frequency range can be adjusted to 120MHz. The output clock signals are buffered and synchronized. The on-chip EMI filters minimize the output clock\'s emissions and the on-chip temperature-compensation circuit minimizes the clock\'s frequency drift due to temperature variations. The MK9173-15CS08LF can be used in a wide range of applications, including high-speed logic circuits, digital signal systems, and embedded systems.

The MK9173-15CS08LF clock generator is an excellent choice for applications requiring low-phase-noise clock signals with accurate control of on-chip frequency synthesizers. It features a wide range of adjustable output frequency and duty cycle settings, as well as several on-chip features to ensure excellent signal stability. This cost-effective, high-precision clock generator is ideal for high-speed computing, telecommunications, and other digital signal applications.

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