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Programmable clock generators offer sub-75ps jitter

Posted: 17 May 2007 ?? ?Print Version ?Bookmark and Share

Keywords:programmable clock generator? low jitter clock? programmable clock generator? below 75ps jitter?

Cypress' CY22180 clock generator

Cypress Semiconductor Corp. introduces CY22180, a low-jitter, single-chip programmable clock generator that offers a low period and cycle-to-cycle jitter output of below 75ps for its entire output frequency range, reaching as low as 60ps for the most commonly used frequencies. The low-jitter device delivers the precision clocking required by networking equipment such as routers and switches, as well as by consumer, communication and industrial apps.

CY22180 is available in field-programmable or factory-programmable options, providing quick sample turn and time to market, along with easy inventory management. The device has a programmable output frequency range of 20-200MHz, making it suitable for multiple applications and platforms. The clock includes an integrated PLL to generate custom frequencies from an external crystal or a driven source.

The device offers a single programmable output and an optional copy of the input frequency. It has an on-chip reference oscillator that is designed to run off a 10-30MHz crystal, or a 10-133MHz external clock signal. CY22180 comes in a small 8-pin SOIC package and requires a 3.3V power supply. The clock operates in commercial and industrial temperature ranges.

The low-jitter clock is now in production and is priced under $1.50 each in volume quantities. Cypress offers in-house programming of samples and prototype quantities of the device using the CY3672-USB Programming Kit and the CY3619 Socket Adapter. Users can custom-configure the CY22180 with the web-based CyberClocks Online Software. Production quantities are available through Cypress's value-added distribution partners or by using third-party programmers from BP Microsystems and others. A high-resolution photo of the new device can be downloaded at"

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