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Low power timing chip with 25fs jitter

Low power timing chip with 25fs jitter

New Products |
By Nick Flaherty



Renesas Electronics has launched a family of timing chips with low power and 25fs jitter for wireline infrastructure, data centre and industrial applications.

The FemtoClock 3 devices provide the levels of phase noise and jitter required to meet the needs of 112Gbps SerDes rates, as well as next generation 224Gbps SerDes designs using commonly available 48MHz to 73MHz crystals. They have a low power dissipation of 1.2W and operating a single 1.8V supply and integrate non-volatile memory allows for device customization in factory at no additional cost to customer.

The highly integrated devices can generate up to four frequency domains and offer integrated LDOs (Low Drop Out regulators) with superior PSRR, reducing board complexity and cost. Having a single chip with multiple operating modes simplifies overall clock tree

The family includes ultra-low jitter clock generators and jitter attenuators with 8 and 12 outputs, enabling high-performance, easy-to-use, and cost-effective clock tree designs for next-generation, high-speed interconnect systems. Target applications for the new devices include telecom switches and routers, top-or-rack data center switches, medical imaging and broadcast audio & video.

The 25fs-rms jitter exceeds next-generation 112Gbps and 224Gbps SerDes reference clock requirements and up to 4 frequency domains allow all system clocks to be generated from a single device compliant with ITU-T G.8262 and G.8262.1 for enhanced synchronous Ethernet. 

Renesas has used the FemtoClock 3 in a reference design for a 1600G Fixed Form Factor Switch.

“Renesas leads the industry with best-in-class timing solutions built from decades of experience and patented technology,” said Zaher Baidas, Vice President of the Timing Division for Renesas. “FemtoClock 3 devices extend that leadership by providing multiple clock and synchronization functions in a single device with ultra-low jitter, simplifying printed circuit board design and reducing solution area and cost.”

“FemtoClock 3 was the only timing solution that offered us the ultra-low jitter performance while maintaining low power dissipation and simplifying the PCB design and lowering solution area on our next-generation switches,” said Vincent Ho, CEO at UfiSpace. “We count on Renesas to deliver the timing solutions that enable us to deliver leading-edge products quickly and cost-effectively.”

The family is available in 7 x 7mm 48-pin VFQFPN and 9 x 9mm 64-pin VFQFPN packages

The FemtoClock 3 supports multiple operating modes, including synchronization, jitter attenuation, and clock generation. Customers can combine the new FemtoClock 3 solution with the broader ClockMatrix™, VersaClock, buffer and oscillator portfolio of timing solutions to address challenging timing needs for their high-performance wireline infrastructure and data center designs.

FemtoClock 3 functions with the Renesas IC Toolbox (RICBox) application, empowering users to configure and program devices on the evaluation board. Additionally, RICBox interfaces with the Renesas Lab on the Cloud platform, providing users with the capability to connect virtually to an actual laboratory setting.

The FemtoClock 3 devices and evaluation boards are available today from Renesas and its distribution partners.

www.renesas.com/femtoclock3.

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