CY22388ZXC-29T

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CY22388ZXC-29T is a clock generator, phase-locked loop (PLL) and frequency synthesizer which are all under the Clock/Timing category. It is designed to provide low-skew signals and low-phase-noise clock in both high-performance and low-power applications.

Application Field

The CY22388ZXC-29T has diverse applications such as MIL-STD-1553B digital data bus subsystems, communication systems, avionics, test and measurement systems, storage systems, automotive systems, and industrial control. It is also used in any design requiring multiple selective frequencies, multiplies of a reference frequency, and any process requiring a lock of reference signal frequency.

Working Principle

CY22388ZXC-29T is an integrated single-chip, frequency synthesizer solution from Cypress Semiconductor. It is based on a charge-pump phase-locked loop (PLL). The on-chip selectable reference oscillator, controllable oscillator, and converters enable a wide range of applications. The on-chip reference oscillator uses either a crystal mode or an on-chip RC oscillator.

The on-chip controllable oscillator generates output frequencies from 40 kHz up to 1.4 GHz and is phase-locked to the reference frequency. The output frequency of the controllable oscillator is determined by the reference frequency and a programmed frequency multiply value. The frequency relationship between the reference and the output can be ratioed by a six-bit value programmable between 4 and 63. The VCO frequency is locked relative to the PLL reference input to ensure frequency stability.

CY22388ZXC-29T is integrated with a low-noise amplifier (LNA) to support feedback frequencies as low as 1000 kHz, thereby providing low-noise performance. The direct access to the PLL loop filter, the baseband reference, the VCO, and the control logic allows the user to program and control the PLL system for a variety of frequencies or ratio settings of the VCO.

The device’s fractional divider design allows maximum flexibility for the generation of intermediate frequencies and provides smooth, low-jitter transitions between frequency compositions. Different output options can be selected including CMOS, differential, single ended, or LVDS.

Conclusion

CY22388ZXC-29T is a clock generator, PLL and frequency synthesizer from Cypress. It has been designed to provide low-skew signals and low-phase-noise clocks in high-performance and low-power applications. The on-chip controllable oscillator generates output frequencies up to 1.4GHz and the VCO frequency is locked to the PLL reference input. With its fractional divider design, CY22388ZXC-29T is able to generate frequencies with smooth, low-jitter transitions between frequency compositions.

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