PORTLAND, Ore. – Requirements for ultra-low jitter and high signal integrity required in PCI-Express interfaces normally require a temperature-controlled quartz crystal to drive a precision clock generator.
MEMS maker Discera Inc. claims to have overcome the requirement for a quartz crystal with a MEMS solution that reduces size and cost of up to third-generation devices. Discera (San Jose, Calif.) claimed it MEMS PCIe clock generator is smaller and less expensive than standard quartz crystal solutions, and “based on our competitive analysis, it is the only MEMS solution with dual outputs,” said Discera CEO Bruce Diamond.
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The DSC557-03 is said to deliver 100-MHz differential output clocks (XO) with phase jitter as low as 0.15 picoseconds and 10 parts-per-million stability up to temperatures as high as 125 degrees C.
The MEMS device is designed to eliminate the external quartz crystal along with capacitors and tuning resistors, saving space in communications, storage and networking devices, Discera said, adding that it draws 25 percent less power and provides 65 percent lower jitter than quartz crystals.
The DSC557-03 is available now in 16 pin drop-in replacements for popular quartz crystals, or a 14-pin QFP that uses 77 percent less board space. Engineering prototypes are programmable with production performance. Volume delivery of production parts is available two weeks after receipt of orders.
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