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SI570 数据表(PDF) 1 Page - Silicon Laboratories

部件名 SI570
功能描述  ANY-RATE I2C PROGRAMMABLE XO/VCXO
Download  26 Pages
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制造商  SILABS [Silicon Laboratories]
网页  http://www.silabs.com
标志 SILABS - Silicon Laboratories

SI570 数据表(HTML) 1 Page - Silicon Laboratories

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Rev. 0.3 6/07
Copyright © 2007 by Silicon Laboratories
Si570/Si571
This information applies to a product under development. Its characteristics and specifications are subject to change without notice.
Si570/Si571
PRELIMINARY DATA SHEET
ANY-RATE I2C PROGRAMMABLE XO/VCXO
Features
Applications
Description
The Si570 XO/Si571 VCXO utilizes Silicon Laboratories’ advanced DSPLL®
circuitry to provide a low-jitter clock at any frequency. The Si570/Si571 are
user-programmable to any output frequency from 10 to 945 MHz and select
frequencies to 1400 MHz with <1 ppb resolution. The device is programmed
via an I2C serial interface. Unlike traditional XO/VCXOs where a different
crystal is required for each output frequency, the Si57x uses one fixed-
frequency crystal and a DSPLL clock synthesis IC to provide any-rate
frequency operation. This IC-based approach allows the crystal resonator to
provide exceptional frequency stability and reliability. In addition, DSPLL
clock synthesis provides superior supply noise rejection, simplifying the task
of generating low-jitter clocks in noisy environments typically found in
communication systems.
Functional Block Diagram
Any-rate programmable output
frequencies from 10 to 945 MHz and
select frequencies to 1.4 GHz
I2C serial interface
3rd generation DSPLL® with superior
jitter performance
3x better frequency stability than
SAW-based oscillators
Internal fixed crystal frequency
ensures high reliability and low
aging
Available LVPECL, CMOS,
LVDS, and CML outputs
Industry-standard 5x7 mm
package
Pb-free/RoHS-compliant
1.8, 2.5, or 3.3 V supply
SONET / SDH
xDSL
10 GbE LAN / WAN
Low-jitter clock generation
Optical modules
Clock and data recovery
Fixed
Frequency
XO
Any-rate
10-1400 MHz
DSPLL
®Clock
Synthesis
CLK-
CLK+
SCL
GND
OE
VDD
SDA
VC
ADC
Si571 only
Ordering Information:
See page 21.
Pin Assignments:
See page 20.
(Top View)
Si5602
Si570
Si571
1
2
3
6
5
4
NC
GND
OE
VDD
CLK+
CLK–
SDA
SCL
8
7
1
2
3
6
5
4
VC
GND
OE
VDD
CLK+
CLK–
SDA
SCL
8
7


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