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S3050 S3050 S3050 supports clock recovery OC-48, OC-24, Gigabit E


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BOARD DECOUPLING GUIDELINES BOARD DECOUPLING GUIDELINES MULTI-RATE SONET/SDH/CLOCK RECOVERY UNIT
S3050 S3050
S3050 supports clock recovery OC-48, OC-24, Gigabit Ethernet, OC-12, OC-3 data rates. CAP1/CAP2 capacitor should with series resistors 150k resistors VCC. figure below illustrates connections S3050 device. ground ring shown around loop filter capacitor. ring should attached brought minimum metal spacing distance pins Please note that ring should directly connected ground plane close possible avoid current through ground ring. values decoupling components paralleled with shown below. Ferrite bead inductors Murrata BLM31B601SPB, BLM11B601SPB equivalent.
Figure
Figure
AVEE
AVCC
CAP1
CAP2
AVCC AVEE
Volt Plane
AVEE
S3050 View TQFP/TEP
AVEE
DNC(1)
Must left floating Ferrite beads AVEE pins used when S3050 operated below ground only. (PECL) operation connect AVEE directly ground.
August 1999
S3050
BOARD DECOUPLING GUIDELINES
Figure Loop Filter Attenuator CAP1/CAP2 Capacitor Resistors
150k 22µF
150k
CAP1/PIN28
CAP2/PIN27
Figure Alternative Loop Filter Attenuator CAP1/CAP2
150k
22µF 22µF
150k
2.2µF
CAP1/PIN28
CAP2/PIN27
August 1999
BOARD DECOUPLING GUIDELINES
S3050
Applied Micro Circuits Corporation 6290 Sequence Dr., Diego, 92121 Phone: (858) 450-9333 (800) 755-2622 Fax: (858) 450-9885 http://www.amcc.com
AMCC reserves right make changes products discontinue semiconductor product service without notice, advises customers obtain latest version relevant information verify, before placing orders, that information being relied current. AMCC does assume liability arising application product circuit described herein, neither does convey license under patent rights rights others. AMCC reserves right ship devices higher grade place those lower grade. AMCC SEMICONDUCTOR PRODUCTS DESIGNED, INTENDED, AUTHORIZED, WARRANTED SUITABLE LIFE-SUPPORT APPLICATIONS, DEVICES SYSTEMS OTHER CRITICAL APPLICATIONS. AMCC registered trademark Applied Micro Circuits Corporation. Copyright 1999 Applied Micro Circuits Corporation
August 1999

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