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CMOS oscillators obsolete quartz crystal

Posted: 05 May 2010     Print Version  Bookmark and Share

Keywords:oscillator  CMOS  MEMS  frequency 

MM8102/MM8202 oscillators

From Integrated Device Technology Inc. (IDT) comes a line of CMOS oscillators that eliminate the usually found quartz crystal that maintains a time base in most electronic devices today, but without having to resort to MEMS.

The MM8102 and MM8202 offer frequency accuracies of better than 300ppm and operate at frequencies of up to 133MHz. By offering both packaged and bare die, IDT claims its oscillators can eliminate the need for bulky quartz crystals in applications where space is at a premium, such as SIM cards, USB flash drives and other serial wireline interface applications including serial ATA, PCIe, USB 2.0 and USB 3.0.

Both parts consume about 2mA at 1.8V, or less than 1µA in standby mode. Unlike MEMS devices, the parts are immune to shock and vibration.

Other companies offering all-silicon CMOS oscillators that do not use MEMS include Silicon Laboratories Inc., Mobius Microsystems Inc., National Semiconductor Corp. and Linear Technology.

- R. Colin Johnson
EE Times

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