Product category:
Communications ICs (Wireless)
News Release from: Silicon Laboratories | Subject: Si570 Any-Rate XO and Si571 Any-Rate VCXO
Edited by the Electronicstalk Editorial
Team on 23 August 2007
Crystal oscillators offer variable
frequencies
Using DSPLL technology and an industry-standard I2C interface, a single device can generate any output frequency from 10MHz to 1.4GHz at jitter levels of 0.3ps rms.
Silicon Laboratories has released the Si570/1 series of user-programmable crystal oscillators (XO) and voltage-controlled crystal oscillators (VCXO) supporting any-rate frequency synthesis Using DSPLL technology and an industry-standard I2C interface, a single device can generate any output frequency from 10MHz to 1.4GHz at jitter levels of 0.3ps rms
This article was originally published on Electronicstalk on 12 Feb 2004 at 8.00am (UK)
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The Si570 Any-Rate XO and Si571 Any-Rate VCXO are ideal for high-performance applications requiring frequency flexible clock sources including next-generation networking equipment, wireless base stations, test and measurement equipment, HDTV video infrastructure and high-speed data acquisition equipment.
Hardware designers have traditionally used multiple fixed-frequency XOs, VCXOs or voltage-controlled SAW oscillators (VCSO) in designs requiring a system timing architecture that is reconfigurable to operate at different frequencies.
This approach is expensive, requires complex analogue phase locked loop (PLL) design and layout and slows time to market for new hardware designs.
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The Si570/1 programmable XOs and VCXOs replace multiple fixed-frequency oscillators with a single, frequency-flexible oscillator that can generate any frequency from 10MHz to 1.4GHz, significantly reducing component count, system cost and board space while simplifying PLL design and layout.
The Si570/1 offer improved system reliability because multiple fixed-frequency oscillators, each representing a potential point of failure, are eliminated.
The Si570/1 operating frequency is user-programmable via an industry-standard I2C interface, simplifying device programming and easing reconfigurability.
The Si570/1 can be reprogrammed an unlimited number of times, enabling system designers to re-use a common timing architecture across a wide range of end applications, simplifying design and speeding time to market.
"We've applied our proven DSPLL technology to dramatically simplify timing architectures in applications requiring multiple clock frequencies".
"The Si570 XO and Si571 VCXO address the growing need for low jitter, frequency-flexible clock sources, enabling hardware designers to decrease the number of oscillators in their designs while reducing cost and design time", said David Bresemann, Vice President of Silicon Laboratories.
"With the addition of the Si570/1 family of any-rate oscillators, Silicon Labs has created the industry's broadest portfolio of reconfigurable, frequency-agile precision clock and frequency control products".
The Si570/1 devices are available in an industry standard, RoHS-compliant 5 x 7mm surface mount package with support for all common output formats (LVPECL, LVDS, CMOS and CML).
The family offers three speed grades: 10MHz to 1.4GHz, 10 to 810MHz and 10 to 215MHz.
The Si570 Any-Rate XO is available with two temperature stability options, +/-20 parts per million and +/-50 parts per million.
The Si571 Any-Rate VCXO has a wide selection of absolute pull range (APR) options ranging from +/-12 parts per million to +/-375 parts per million, giving hardware designers increased flexibility when choosing the best device for an application.
The Si570/1 support operation from -40 to +85C.
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