CY2291FXT

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CY2291FXT is a high-performance, cost-effective programmable integrated clock synthesizer (ICS) used in applications such as communications, networking, embedded systems and servers. It is a single-chip solution capable of providing high-accuracy clock signals in a wide range of frequencies and formats. It offers a low-power clock generator that utilizes a highly programmable mixed-mode oscillator to generate low-jitter clock pulses. This ICS is available in commercial, industrial and extended temperature ranges.

The CY2291FXT is a 10-pin device that features a programmable 4.5V to 5.5V voltage regulator for providing voltage for the device. The ICS also features a low power programmable oscillator, an on-chip feedback buffer, a selectable capacitor array and a reference generator. The feedback buffer and capacitor array allow for precise programming of the clock frequency.

The CY2291FXT ICS is designed to be used as a single-chip solution for generating or synthesizing a variety of frequencies and formats without the need for external components. The device is capable of generating frequencies ranging from 2KHz to 220MHz with a frequency resolution of 1 part-per-million (PPM). It can also generate different output drive formats such as CMOS, LVPECL, CML, and LVDS. The output frequencies can also be programmed over the I2C interface and this can help to reduce EMI issues.

The working principle of the CY2291FXT ICS is based on a highly programmable mixed-mode oscillator that utilizes the feedback from a selectable capacitor array to generate low-jitter clock pulses. The oscillator consists of three sections – the phase-locked loop (PLL), the analog oscillator and the digital logic. The PLL is responsible for controlling the voltage-controlled oscillator (VCO) and providing the reference signal for the loop. The analog oscillator is made up of operational amplifiers and CMOS amplifiers which provide the necessary gain and buffering for the output signal.

The digital logic section of the ICS is responsible for generating clock signals in response to the PLL input signals. It also allows for the programmable frequencies and output formats via the I2C interface. The CY2291FXT also includes a startup ROM which can be used to store the initial arguments for the ICS in order to reduce the startup time of the device.

In conclusion, the CY2291FXT is a high-performance, cost-effective, and low-power programmable integrated clock synthesizer (ICS) that is suitable for a wide range of applications. It features a programmable voltage regulator, a mix-mode oscillator with selectable capacitor array and a feedback buffer, as well as an I2C interface for programming output frequencies and formats. It can generate frequencies from 2KHz to 220MHz with a frequency resolution of 1PPM and output formats such as CMOS, LVPECL, CML, and LVDS.

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