Precision EdgeSY55854U Evaluation Board Final DC-coupled terminat
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2.5GHz CROSSPOINT SWITCH
Precision EdgeSY55854U Evaluation Board Final
DC-coupled terminated inputs DC-coupled outputs Positive ground Selects through on-board switch data select inputs outputs accessible connectors
DESCRIPTION
SY55854U crosspoint switch optimized high-speed data and/or clock applications 2.5Gbps 2.5GHz) where jitter skew critical. Each SY55854U inputs routes output, thus distribute multiplex clock data stream. This document provides detailed description evaluation board, Complete information this document includes: Measuring Board schematic Bill materials
EVALUATION BOARD COMPONENTS
SY55854U evaluation board SY55854U data sheet this document Various pairs length-matched cables (user supplied)
First Data Input Pair
First Data Output Pair
First Select Input Pair
Second Select Input Pair
Header Power Supply
Second Data Input Pair
Second Data Output Pair
Precision Edge trademark Micrel, Inc.
Rev.: Amendment:
Issue Date: October 2002
Micrel
SY55854U EVALUATION BOARD
EVALUATION PROCEDURE
Measuring with SY55854U This section describes obtain diagram using SY55854U evaluation board. will need: SY55854U evaluation board power supply digital signal source capable generating pseudorandom patterns 2.5Gbps oscilloscope capable showing patterns pairs length-matched cables Four termination following steps allow user generate diagram using SY55854U evaluation board. Connect Power Source: power supply must about 3.3V. Current consumption will under 100mA. Connect positive power supply bottom power supply header, marked "VCC," having ground symbol. Connect negative power supply power supply header. Connect Data Source: your data source generate pseudo-random data stream. pattern 27-1 PRBS better will there choice, 223-1 PRBS. data rate 2.5Gbps. output high level +0V, output level -400mV. Using pair length matched cables, connect differential output signal generator "D0" "/D0" connectors. Connect Data Output: Using another pair length matched cables, connect "Q0," "/Q0" connectors oscilloscope. Connect trigger output from digital generator trigger input oscilloscope. Terminate Unused Inputs Outputs: "D1," "/D1," "Q1," "/Q1" connectors with terminators. Configure SY55854U Evaluation Board: Ensure that "S0, "and "/S0," connectors open. further information regarding select various inputs, please refer Table View Eye: Adjust oscilloscope show diagram.
2.3V 3.0V 3.0V 5.7V 2.3V 5.7V 2.3V 3.0V 3.0V 5.7V 2.3V 5.7V
Connection "S0" open "/S0" "S0" open "/S0" open "S0" "/S0" open "S1" open "/S1" "S1" open "/S1" open "S1" "/S1" open
Function "Q0" sources "D0" "Q0" sources "D0" "Q0" sources "D1" "Q1" sources "D0" "Q1" sources "D0" "Q1" sources "D1"
Table Select Settings
Micrel
SY55854U EVALUATION BOARD
EVALUATION BOARD SCHEMATICS
Pulse Generator
/OUT SY55854U 0.1µF
QSOP
Same length
Scope Scope
Same length
0.1µF 0.1µF
3.3V
22µF
Header Pins
Figure SY55854U Evaluation Board Schematic
Micrel
SY55854U EVALUATION BOARD
BILL MATERIALS
Item C2-C6, C19, Designator Designator R1-R3, R9-R11 R17, SY55854U Micrel Semiconductor Part Number Manufacturer Description 22µF, Size Tantalum Electrolytic Capacitor 100nF, X7R, Size 0603 Ceramic Capacitor 3-Pin Inch Header with Ceramic Removed Edge Launch Connector 100, Size 0603, 1/10W Resistor 2.5Gbps Crosspoint Switch Qty.
TECHNICAL SUPPORT INFORMATION
Telephone Number Email (408) 914-7671 hbwhelp@micrel.com
ORDERING INFORMATION
Evaluation Board Part# SY55854U-EVAL Package TQFP Operating Range -40°C +85°C
MICREL, INC.
1849 FORTUNE DRIVE JOSE, 95131
(408) 944-0800
(408) 944-0970
http://www.micrel.com
This information believed accurate reliable, however responsibility assumed Micrel infringement patents other rights third parties resulting from use. license granted implication otherwise under patent patent right Micrel, Inc. 2002 Micrel, Incorporated.
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