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Clock multiplier, jitter attenuator ICs target comms apps

Posted: 17 Sep 2014 ?? ?Print Version ?Bookmark and Share

Keywords:Microsemi? clock multiplier? jitter attenuator? communication? oscillator?

Microsemi Corp. has uncloaked the ZL30252 and ZL30253 any-to-any frequency clock multiplier and jitter attenuator ICs. Featuring best-in-class jitter performance as a clock multiplier (160fs in the 12kHz-20MHz band) and as a jitter attenuator (250fs in the 12kHz-20MHz band) all in an ultra-small 5 x 5mm package, the devices are geared for applications with tough jitter budgets and tight board real estate restrictions, stated the company.

The devices provide communication equipment customers with a timing solution that meets industry-leading jitter performance imposed by the latest 100Gb/s PHY devices, noted Microsemi.

ZL30252 and ZL30253

The ZL30252 and ZL30253 also reduce the overall BOM cost and simplify design with precise frequency conversion from any input frequency 1kHz to 1.25GHz to any output frequency 1Hz to 1.035GHz and jitter attenuation bandwidths from 14-500Hz, detailed the company. When combined with Microsemi's ZL402xx series fan-out buffers, the ZL30252 and ZL30253 provide complete timing solutions for complex systems such as wireless base stations, wireless backhaul, wired infrastructure, SONET/ SDH, GE, 10G/40G/100G Ethernet, optical, storage and broadcast video applications.

The ZL30252 and ZL30253 have highly configurable output clocks and offer automatic self-configuration at power-up. This supports up to four different configurations easily selected using two device pins. Key features include any-to-any frequency conversion with zero ppm error (inputs: 1kHz-1.25GHz, outputs: 1Hz-1GHz); digital PLL with programmable bandwidth from 14-500Hzl input clock monitoring and automatic or manual input switching; three universal clock inputs connect to any signal format at any voltage and up to three differential outputs or six CMOS outputs; operate as numerically controlled oscillator (NCO); and configurable output signal format and voltage for direct interface without additional components.

The ZL30252 and ZL30253 offer NCO mode in which output frequencies can be controlled with very high resolution by system software. This capability allows the devices to replace solutions using large, expensive, fixed-frequency voltage-controlled oscillators (VCXOs) with a small, low-cost and any output clock solution.

The ZL30252 and ZL30253 are also flexible building-blocks that system designers can use in various parts of their design. For example, they can be used as a master clock jitter attenuator and multiplier for other Microsemi timing ICs. This allows customers to reuse previously-qualified TCXOs or OCXOs regardless of frequency or jitter. When deployed on a line card, the ZL30252 or ZL30253 simplify system design and reduce the cost of backplane connectors by accepting low frequency clocks from the backplane and performing rate conversion and jitter attenuation on the line card, added Microsemi.

The ZL30252 and ZL30253 are available.





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