CY7B9940V-2AXIT

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The CY7B9940V-2AXIT from Cypress Semiconductor is a high performance low jitter differential output clock generator. This programmable clock generator device combines a clock synthesizer and a jitter attenuator, enabling a wide range of high speed standards, such as 40.6155 Gb/s wideband optical and high speed clock applications. It is a perfect solution for systems requiring high speed data and clock rates.

The application field of this integrated circuit is vast, including, but not limited to: ultra-high speed routers and switches, clock distribution, transceivers, data centers, system design, and various optical applications. In addition, the device is capable of supporting a wide range of common synchronous/asynchronous standards.

The working principle of CY7B9940V-2AXIT is based on a differential phase-locked loop (PLL). It consists of a variable frequency oscillator (VCO), a voltage-controlled phase/frequency detector (VCFD), a loop filter, and a digital divider. The oscillator generates the reference clock signal and the divider divides the clock signal into the desired frequency, which is then fed to the loop filter. The loop filter is used to filter out any unwanted noise and ensure a clean clock signal. The resulting clock is then fed to the VCFD, which compares the frequency of the reference clock to the frequency of the clock signal and it adjusts the oscillator’s frequency so that it is equal to the reference clock’s frequency.

The differential output enables two-phase clocking and can be used to produce guaranteed waveforms with consistent and repeatable duty cycles, clock jitter, and waveform stability. The device is capable of producing any output frequency from 0.12 GHz up to 203.4 MHz with up to 75MHz of output swing. It has a programmable modern ratio of 4/5, 5/4 and can operate from 1.2V to 1.8V supply voltage. In addition, the CY7B9940V-2AXIT features very low jitter and power consumption.

Overall, the CY7B9940V-2AXIT is an ultra-low jitter, low power, high speed programmable clock generator that is perfect for demanding clock applications. Its wide range of output frequency and application versatility makes it an ideal choice for challenging designs.

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