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Vol. 2 Issue 8

October, 2007 


SiTime Reveals Two New Products 

Introducing the SiT8102
 
All SiT8102 oscillators contain the world’s most pervasive MEMS resonator and a CMOS IC that controls, drives, and frequency multiplies the MEMS resonator.  This advanced architecture is one time factory programmable and generates any frequency between 1 MHz and 200 MHz with only +/-50 or +/-100 ppm frequency error inclusive of aging, power supply variation, and shock.  Product family options also include: commercial and industrial temperature ranges; operating power supplies from 1.8 V, 2.5 V, or 3.3; and a power down mode or an output disable mode for lower power consumption.

SiT8102 Advantages
Programmable oscillators offer immediate frequency generation and lead-time benefits because they are stocked in high volume and frequency programmed on demand.  However, traditional programmable oscillators have been limited to applications that could accept between +/-70 ps p-p jitter (10 ps rms) to +/-250 ps p-p jitter (30 ps rms) depending on the frequency.

The SiT8102 oscillator has much better jitter performance as compared to traditional programmable oscillators, evidenced by the performance table below.

 Communication Standard  Frequency  Band Measured  rms phase jitter
(random)
 Fiber Channel  106.25 MHz  637 kHz to 10 MHz  1.3 ps
 Gigabit Ethernet  125 MHz  125 MHz     1.875 MHz to 20 MHz  0.5 ps
 SATA/SAS  75 MHz  900 kHz to 7.5 MHz  0.73 ps

This performance advancement now allows SiTime’s programmable oscillators to compete with traditional fixed-frequency quartz oscillators while still retaining the short lead times and high volume availability.

All of the customary benefits of SiTime’s MEMS FirstTM and EpiSealTM processed resonators apply to the SiT8102 product family.  These benefits include: excellent frequency performance over age, temperature, shock, vibration, and constant acceleration.  Inside the package the resonator measures a mere 0.8 x 0.6 mm.  As a result the oscillator family is able to be packaged in a tiny 2.5 x 2.0 x 0.8 mm QFN-type IC package.  Larger industry standard package sizes are also available.

The combination of excellent jitter performance, tiny size, and mechanical robustness of the SiRes™ MEMS resonators, and low-cost IC packages compatible with quartz-based oscillator footprints make the SiT8102 oscillators ideal clock references for USB 2.0 HS, Firewire, Fibrechannel, SATA, PCI-Express, Gigabit Ethernet, and other high-speed serial communication protocols.

Pricing and Availability
The SiT8102 is currently available for limited sampling, and will be widely available for sampling beginning November 1st, 2007.  All SiT8102 package types are very competitively priced as the cost structure of MEMS based oscillators is lower than quartz.  Visit http://www.sitime.com for more information about SiTime, and the new low-jitter SiT8102 programmable oscillators.
 
Introducing the SiT8002UT
The SiT8002UT can be factory programmed to deliver any frequency from 1 MHz to 125 MHz with frequency stability of +/-200 ppm over the industrial temperature range (-40 to +85 C).  This new product is available in a 3.0 x 3.5 x 0.40 mm QFN surface mount package, which makes the SiT8002UT the thinnest oscillator on the market today. Like all SiTime products, the SiT8002UT is lead free and RoHS compliant.
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SiTime’s Advantages
SiTime’s SiRes™ MEMS resonators have inherent size, stability, and performance advantages that address all of the aforementioned technical challenges.  Because the resonator is fabricated using standard CMOS SOI wafers with EpiSealTM encapsulation, by default SiTime’s resonators are much thinner than quartz or ceramic based resonators.  SiTime’s resonators are robust due to the quad structure of the resonator and the patented MEMS FirstTM and EpiSealTM fabrication processes.  


The resonator withstands shock of 30,000 G’s and automotive vibration testing of 40 G’s from 5 kHz to 20 kHz.   Finally, the frequency stability of SiTime’s SiT8002UT is an outstanding +/-200 ppm over the industrial temperature range (-40 to +85 C) with tighter frequency tolerance versions planned. 
The inherent advantages of being thin, mechanically robust, and highly stable in terms of frequency stability afforded by SiTime’s patented SiRes™ MEMS resonator ideally position the SiT8002UT to address portable, multi-chip module, and automotive applications that require low profile clock references. 
For more information and avaliblity please visit the SiT8002UT product page.

Buy SiTime Products Online! 
The two products currently offered through SiTime Direct™ are the SiT8002 and the SiT1.  The SiT8002 is the world’s smallest programmable oscillator, which allows for fast-turn rapid prototypes, and can be programmed to any frequency between 1 MHz and125 MHz.  The SiT1 fixed frequency oscillators are available in 173 common frequencies and are a low cost solution for high volume customers.  Both oscillator products are offered in four package sizes down to 2.5 x 2.0 mm, and are highly reliable, mechanically robust, and low cost compared to the competitive quartz solution.

 

 

 

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