SUNNYVALE, Calif.—The dream of integrating a high-precision oscillator on a standard CMOS chip has been realized by Silicon Laboratories Inc. and its new Si50x family of CMEMS oscillators.
Conceived by Silicon Clocks, which was acquired in 2010, Silicon Labs has since been quietly perfecting its single-die solution that allows MEMS oscillators to be fabricated atop a CMOS chip in any standard foundry. As a result, mixed-signal chip maker Silicon Labs now lays claim to the world's first single-die alternative to quartz crystals.
"CMEMS oscillators match the best characteristics of quartz crystals while increasing stability, improving reliability and shortening lead times," said Mike Petrowski, vice president and general manager of Silicon Labs' timing products. "We believe CMEMS is now the best-in-class general-purpose oscillator solution for cost- and power-constrained embedded, industrial and consumer electronics applications."
By casting a micro-electro-mechanical system oscillator (yellow) atop a standard CMOS chip, CMEMS marries the scalability and economy of silicon to the reliability and stability of MEMS.
Source: Silicon Labs
Silicon Labs' CMEMS technology, of which the Si50x is the first family, combines a MEMS resonator atop its frequency control circuitry on a single CMOS die, enabling standard foundries to produce the CMEMS oscillators on their high-volume fabrication lines. Silicon Labs is targeting its CMEMS oscillators at mass market applications including digital cameras, storage and memory devices, ATM machines, point-of-sale equipment and multi-function printers.
To guarantee supplies, CMEMS oscillators are currently fabricated on the massive line at Semiconductor Manufacturing International Corporation (SMIC)--the same Chinese foundry used by Broadcom, Qualcomm and Texas Instruments.