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SY87729LHI

Description
3.3V AnyClock (10MHz to 365MHz) FRACTIONAL N SYNTHESIZER
CategoryWireless rf/communication    Telecom circuit   
File Size499KB,17 Pages
ManufacturerMicrochip
Websitehttps://www.microchip.com
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SY87729LHI Overview

3.3V AnyClock (10MHz to 365MHz) FRACTIONAL N SYNTHESIZER

SY87729LHI Parametric

Parameter NameAttribute value
Is it Rohs certified?incompatible
MakerMicrochip
Parts packaging codeQFP
package instructionHTQFP, TQFP32,.35SQ,32
Contacts32
Reach Compliance Code_compli
appATM;SDH;SONET
JESD-30 codeS-PQFP-G32
JESD-609 codee0
length7 mm
Humidity sensitivity level3
Number of functions1
Number of terminals32
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Package body materialPLASTIC/EPOXY
encapsulated codeHTQFP
Encapsulate equivalent codeTQFP32,.35SQ,32
Package shapeSQUARE
Package formFLATPACK, HEAT SINK/SLUG, THIN PROFILE
Peak Reflow Temperature (Celsius)240
power supply3.3 V
Certification statusNot Qualified
Maximum seat height1.2 mm
Maximum slew rate0.275 mA
Nominal supply voltage3.3 V
surface mountYES
Telecom integrated circuit typesATM/SONET/SDH SUPPORT CIRCUIT
Temperature levelINDUSTRIAL
Terminal surfaceTin/Lead (Sn85Pb15)
Terminal formGULL WING
Terminal pitch0.8 mm
Terminal locationQUAD
Maximum time at peak reflow temperature30
width7 mm
SY87729L
3.3V AnyClock
®
, 10MHz to 365MHz
Fractional N Synthesizer
General Description
The SY87729L is a complete rate independent frequency
synthesizer integrated circuit. From a single reference
source, this device generates a differential PECL
reference frequency for Micrel's SY87721L 10Mbps to
2.7Gbps combined CDR and CMU.
The SY87729L generates an exactly correct reference
frequency for common data transport protocols. This is
especially important in transponder applications, where a
standards compliant protocol data unit must be generated
downstream, even in the absence of any signal from the
associated upstream interface.
In addition, SY87729L will generate exactly correct
reference frequencies for common data transport protocols
augmented by forward error correction codes.
For proprietary applications, the SY87729L generates
reference frequencies guaranteed to enable the SY87721L
CDR to lock to any possible baud rate in its range.
SY87729L accepts configuration via a MicroWire™
interface.
Data sheets and support documentation can be found on
Micrel’s web site at:
www.micrel.com.
AnyClock
®
Features
Fractional synthesizer from 10MHz to 365MHz from a
single 27MHz reference oscillator
Generates exactly the correct frequency for common
transport protocols with or without FEC
Directly enables SY87721L to lock onto any data rate
within its range
Exceeds BellCore and ITU jitter generation
specifications
Programmable via MicroWire™ interface
Available in 32-Pin EPAD-TQFP package
Applications
Metro access system
Transponders
Multiplexers: access, add drop mux
SONET/SDH/ATM-based transmission systems,
modules and test equipment
Broadband cross-connects
Fiber optic test equipment
Protocols supported:
OC-1, OC-3, OC-12, OC-48, ATM, Gigabit Ethernet,
Fast Ethernet, Fibre Channel, 2X Fibre Channel,
1394, InfiniBand, Proprietary Optical Transport
AnyClock and AnyRate are registered trademarks of Micrel, Inc.
MicroWire is a trademark of National Semiconductor
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
408
) 944-0800 • fax + 1 (408) 474-1000 •
http://www.micrel.com
July 2011
M9999-072111-G
hbwhelp@micrel.com
or (408) 955-1690

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SY87729LHI SY87729L_06 SY87729L SY87729LHITR SY87729LHYTR SY87729LHI-EVAL
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