ETM52E-03
Application Manua
l
Programmable Crystal Oscillator
SG-8506CA
Preliminary
NOTICE
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This material is subject to change without notice.
Any part of this material may not be reproduced or duplicated in any form or any means without the
written permission of Seiko Epson.
The information about applied circuitry, software, usage, etc. written in this material is intended for
reference only. Seiko Epson does not assume any liability for the occurrence of infringing on any
patent or copyright of a third party. This material does not authorize the licensing for any patent or
intellectual copyrights.
When exporting the products or technology described in this material, you should comply with the
applicable export control laws and regulations and follow the procedures required by such laws
regulations.
You are requested not to use the products (and any technical information furnished, if any) for the
development and/or manufacture of weapon of mass destruction or for other military purposes.
are also requested that you would not make the products available to any third party who may use
the products for such prohibited purposes.
These products are intended for general use in electronic equipment. When using them in specific
applications that require extremely high reliability, such as the applications stated below, you must
obtain permission from Seiko Epson in advance.
Space equipment (artificial satellites, rockets, etc.) / Transportation vehicles and related
(automobiles, aircraft, trains, vessels, etc.) / Medical instruments to sustain life /
Submarine transmitters / Power stations and related / Fire work equipment and security
equipment / traffic control equipment / and others requiring equivalent reliability.
All brands or product names mentioned herein are trademarks and/or registered trademarks of
their respective.
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SG-8506CA
Table of Contents
1. Overview ..................................................................................................................... 1
2. Part Number ............................................................................................................... 2
3. Block Diagram ............................................................................................................ 3
4. Pin Assignments ........................................................................................................ 4
4.1.
4.2.
5.1.
5.2.
5.3.
5.4.
5.5.
Pin Assignments ........................................................................................................................ 4
Pin Descriptions ......................................................................................................................... 4
Absolute Maximum Ratings ...................................................................................................... 5
DC Characteristics ..................................................................................................................... 5
AC Characteristics ..................................................................................................................... 7
LVPECL ...................................................................................................................................... 11
Startup ....................................................................................................................................... 13
5. Electrical Characteristics .......................................................................................... 5
6. Functions .................................................................................................................. 14
6.1. Overview .................................................................................................................................... 14
6.2. Setting of the Output Frequency ............................................................................................ 14
6.2.1. Calculation of the Frequency Setting .................................................................................. 14
6.2.2. Reconfiguring Frequency Setting ........................................................................................ 16
6.3. I
2
C interface ............................................................................................................................... 17
6.3.1. Connection of I
2
C Bus ......................................................................................................... 17
6.3.2. I
2
C Bus Protocols Supported by the SG-8506CA ............................................................... 18
6.3.3. START Condition and STOP Condition ............................................................................... 18
6.3.4. Byte Format and ACK/NACK............................................................................................... 19
6.3.5. Read/Write to Register ........................................................................................................ 19
7. Registers................................................................................................................... 20
7.1.
7.2.
7.3.
7.4.
7.5.
7.6.
7.7.
7.8.
7.9.
7.10.
List of registers......................................................................................................................... 20
Product Code 0 Register ......................................................................................................... 20
Product Code 1 Register ......................................................................................................... 20
Revision Code Register ........................................................................................................... 21
ID Code 0 Register.................................................................................................................... 21
ID Code 1 Register.................................................................................................................... 21
ODIV Register ........................................................................................................................... 22
NINT Register ............................................................................................................................ 22
NFRAC Register........................................................................................................................ 23
PLL Control Register................................................................................................................ 24
8. Dimensions............................................................................................................... 25
9. Device Marking......................................................................................................... 26
10. Soldering Pattern ..................................................................................................... 27
11. Application Note ...................................................................................................... 28
SG-8506CA
1.
Overview
Programmable crystal oscillator: SG-8506CA is a low jitter programmable XO at any frequency. Its
output frequency is programmable from 50 MHz to 800 MHz with almost 2 ppb resolution.
SG-8506CA consists of XO, PLL and LVPECL output buffer.
XO supplies stable reference clock to PLL with fundamental tone crystal.
PLL consists of a low jitter fractional-N PLL technology. The components for loop filter are embedded
into IC, so no external filter component is needed.
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Programmable clock output frequency from 50 MHz to 800 MHz
Frequency setting resolution is around 2 ppb
Low jitter and high reliability clock source from the fundamental tone internal crystal
Low jitter and low noise PLL
One factory preset power-up default frequency
Programmable one preset power-up default frequency (Only the blank Sample can be programmed
one time with SG-Writer II)
Factory preset device options
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OE polarity
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Output standby type: Hi-Z or OUT = “L”, OUTN = “H”
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I
2
C interface slave address
Embedded resistors and capacitors for oscillator and loop filter for PLL
I
2
C interface
LVPECL output
8-pin ceramic 5 x 7 mm package
2.5 V or 3.3 V supply voltage modes
-40 ° ~ +85 ° ambient operating temperature
C
C
Pb-free / RoHS-compliant
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[Evaluation Kit]
The evaluation kit of SG-8506CA is available. Please ask us for more information.
Page - 1
ETM52E-03
SG-8506CA
2. Part Number
Standard (Factory preset start-up frequency product)
Blank (one-time programmable start-up frequency product)
Page - 2
ETM52E-03
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