For many years technologists have discussed the advantages of MEMS technology over quartz. Points include the improved versatility, the smaller size, the better performance, and the lower power. Most of these are proven. The versatility of MEMS oscillators is dramatically better than quartz, with programmable frequency, supply, drive type, etc. MEMS resonators are much smaller than quartz, under a half millimeter on a side. And performance can be better, for instance with improved accuracy and lower jitter.
But what about lower power? That is now proven as well. SiTime is shipping the SiT8004 in production volumes. This versatile oscillator supports output frequencies from 125 to 150 MHz, supplies from 1.8 to 3.3 V, and a range of packages and control pin options. Its uses only 6.7 mA supply current at 125 MHz – an amazingly low number – which makes it the world’s lowest power oscillator it its class.
The SiT8004 is a high frequency oscillator, which is difficult for quartz. In quartz this requires overtone or inverse mesa crystals, and neither option is easy, inexpensive, or low power. Low power quartz parts normally have lower frequencies, while the higher performance higher frequency parts burn more power. How is it that SiTime can deliver both high frequency and low power at once? Our MEMS oscillators leverage CMOS circuitry for their performance, and we all know that CMOS circuitry provides steadily improving performance at continuously decreasing power.
The new SiT8004 delivers on the low power promise. The low power reduces product and environmental cost, while the high frequency supports the performance that many new systems require.