SY87725L Evaluation Board SY87725L evaluation board designed conv
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2.5Gbps GPON/BPON SERDES
SY87725L Evaluation Board
SY87725L evaluation board designed convenient setup quick evaluation SY87725L using single power source. evaluation board optimized interface directly test equipment since evaluation board configured with AC-coupled inputs AC-coupled outputs. datasheets support documentation found Micrel's site www.micrel.com.
Features
Single +3.3V power supply AC-coupled configuration direct interface with test equipment 2.5G/1.25G/625M down stream 1.25G/625M/156M stream
Related Documentation
SY87725L, 2.5Gbps GPON/BPON Serdes Datasheet
Evaluation Board
Micrel Inc. 2180 Fortune Drive Jose, 95131 (408) 944-0800 (408) 474-1000 http://www.micrel.com
March 2007
M9999-030507-A hbwhelp@micrel.com (408) 955-1690
Micrel, Inc.
SY87725L Evaluation Board Cable Interface: Using equal length impedance coaxial cables connect signal source inputs evaluation board. Using equal length impedance coaxial cables connect outputs evaluation board oscilloscope another measurement device that internal termination. Unequal length cables recommended since they introduce duty cycle distortion unwanted signal delays. Connect trigger input scope trigger output signal generator. evaluation board dipswitch appropriate input selection. Enable signal source, turn source, monitor outputs.
Evaluation Board Description
AC-Coupled Evaluation Board SY87725L 64-pin EPAD-TQFP package. evaluation board designed operate with single 3.3V ±10% power supply configured with AC-coupled inputs outputs. high-speed input output channels brought connectors through matched-length AC-coupled differential strip-line traces. AC-Coupled Input ease use, AC-coupled inputs biased onboard. user need only supply appropriate input swing board. AC-Coupled Output SY87725L configured with AC-coupled outputs allowing board interface directly with equipment. AC-coupling allows board single power supply. Unused Output Single-Ended Scope Unused complimentary outputs should terminated into 50-to-ground prevent unwanted reflections.
Evaluation Board Layout
Board Layout evaluation boards constructed with Rogers 4003 material coplanar design fabricated minimize noise, achieve high bandwidth minimize crosstalk.
AC-Coupled Evaluation Board Setup
Setting SY87725L AC-Coupled Evaluation Board voltage supply +3.3V turn supply. Connect terminal negative side power supply. Connect terminal positive side power supply. LVPECL input signal, VCC-2.0V. Signal Generator: Using differential signal source, amplitude each side differential pair 400mV (800mV measured differentially). offset positive value, value offset critical, since AC-coupled inputs will automatically biased. Turn outputs signal source.
Signal
Table Layer Stack
March 2007
M9999-030507-A hbwhelp@micrel.com (408) 955-1690
Micrel, Inc.
SY87725L Evaluation Board
Evaluation Board Schematic
March 2007
M9999-030507-A hbwhelp@micrel.com (408) 955-1690
Micrel, Inc. this Document following pages show individual test modes built into SY87725L. diagram each mode shows main data flow that mode. table required switch settings lists switch settings that mode; unlisted switch settings used that mode. diagram left table shows actual switch settings they would appear evaluation board. switches configured with pull-up resistor
SY87725L Evaluation Board output when switch "OFF" position output HIGH when switch "ON" position output pulled ground, LOW. test flow diagram Appendix lists modes order from minimum functionality full configuration. This allows user start with simplest configuration progress full configuration.
March 2007
M9999-030507-A hbwhelp@micrel.com (408) 955-1690
Micrel, Inc.
SY87725L Evaluation Board
Remote Loopback Data This most basic test mode. loops back data from SOUT used verify connections
SOUT well power supply connections evaluation board. SOUT output monitored with scope serial BERT.
Switch Settings TESTb XMT_CTRL0/1
Function Disables factory test mode (enables normal operation) Selects remote loopback mode SDOUT SDIN
Table Required Switch Settings Remote Loopback Data Flow
Figure Switch Settings Remote Loopback Data
March 2007
M9999-030507-A hbwhelp@micrel.com (408) 955-1690
Micrel, Inc.
SY87725L Evaluation Board
Remote Loopback Recovered Clock Verifies correct operation receive CDR. RefClk 155.52MHz 77.76MHz (selected REFFREQSEL) must supplied function. When
HIGH, recovered clock coming SOUT will synchronous same data rate data coming into SIN. When LOW, clock coming SOUT will synchronous with RefClk source. Switch Settings RCV_FSEL0/1 Function Sets receive frequency 2.48832Gbps (For other frequencies, refer Receive Frequency Selection Table page SY87725L Datasheet.) Disables factory test mode (enables normal operation) Enables clock data recovery Selects RefClk 155.52MHz (Set 77.76MHz RefClk) Selects remote loopback mode SDOUT recovered clock
TESTb REFFREQSEL
XMT_CTRL0/1
Figure Switch Settings Remote Loopback Recovered Clock
Table Required Switch Settings Remote Loopback Recovered Clock Flow
March 2007
M9999-030507-A hbwhelp@micrel.com (408) 955-1690
Micrel, Inc.
SY87725L Evaluation Board
Remote Loopback Recovered Data Verifies correct operation receive CDR. RefClk 155.52MHz 77.76MHz (selected REFFREQSEL) must supplied function. When
HIGH, recovered data coming SOUT will same data coming into (retimed). operation verified with serial BERT.
Switch Settings RCV_FSEL0/1
Function Sets receive frequency 2.48832Gbps (For other frequencies, refer Receive Frequency Selection Table page SY87725L Data sheet.) Disables factory test mode (enables normal operation) Enables clock data recovery Selects RefClk 155.52MHz Selects remote loopback mode SDOUT recovered data
TESTb REFFREQSEL XMT_CTRL0/1
Figure Switch Settings Remote Loopback Recovered Data
Table Required Switch Settings Remote Loopback Recovered Data Flow
March 2007
M9999-030507-A hbwhelp@micrel.com (408) 955-1690
Micrel, Inc.
SY87725L Evaluation Board
Bypass Mode Verifies correct operation receive DeMux. this mode bypassed serial data coming into must clocked serial clock coming into RefClk input. this mode only, RefCLK will 155.52MHz 77.76MHz must same
rate Serial Data (SIN). example, REFCLK 155.52MHz, then must 155.52Mbps. 4bit parallel data output DOUT0-3 verified with parallel BERT.
Switch Settings RCV_DDRSEL
Function Sets receive CLKOUT frequency RefClk frequency divided-by RCV_DDRSEL CLKOUT frequency will RefClk frequency divided-by
RCV_CTRL0/1 RefClk bypass (RefClk must clock rate data.) TESTb Disables factory test mode (enables normal operation)
Table Required Switch Settings Bypass Mode Data Flow Figure Switch Settings Bypass Mode
March 2007
M9999-030507-A hbwhelp@micrel.com (408) 955-1690
Micrel, Inc.
SY87725L Evaluation Board
Local Loopback Data Flow Verifies correct operation transmit 4-bit receive 4-bit DeMux through parallel interface. this mode parallel clock data applied CLKIN DIN0-3 transmit inputs then serialized into receive 4-bit DeMux where output CLKOUT 4-bit parallel DOUT0-3 outputs. CLKIN multiplied serial rate synthesizer (clock multiplier). This allows parallel BERT used verify DeMux operation independent CDR.
Switch Settings RCV_DDRSEL
Function Sets Clkout parallel data rate
RCV_CTRL0/1 Sets local loopback XMT_FSEL0/1 Sets parallel data rate 1.24416Gbps/4 TESTb XMT_DDRSEL Disables factory test mode (enables normal operation) Selects CLKIN parallel data rate. CLKIN must correspond DIN0-3 data rate.
Table Required Switch Settings Local Loopback Data Flow
Figure Switch Settings Local Loopback Data March 2007
M9999-030507-A hbwhelp@micrel.com (408) 955-1690
Micrel, Inc.
SY87725L Evaluation Board
Normal Data Flow This normal operating mode verifies receive transmit sections independently, which means combination allowed receive transmit data
rates used. switch settings below select frequencies data rates specified block diagram. Switch Settings RCV_DDRSEL RCV_CTRL0/1 RCV_FSEL0/1 Function Sets Clkout parallel data rate Selects normal receive data path Sets receive frequency 2.48832Gbps (For other frequencies, refer Receive Frequency Selection Table page SY87725L Data sheet.) Sets parallel data rate 1.24416Gbps/4 Disables factory test mode (enables normal operation) Enables clock data recovery Selects RefClk 155.52MHz Selects normal transmit data path Selects Clkin parallel data rate
XMT_FSEL0/1 TESTb REFFREQSEL XMT_CTRL0/1 Figure Switch Settings Normal Data Flow XMT_DDRSEL
Table Required Switch Settings Normal Data Flow March 2007
M9999-030507-A hbwhelp@micrel.com (408) 955-1690
Micrel, Inc.
SY87725L Evaluation Board
BiIl Materials
Item C1-C3 C4-C6 C7-C36, C38C42, C45-C51, C56-C57 C43-C45, C52-C54 J3-J6, J32-J34 J7-J34 L1-L4 Q1-Q3 R1-R2, R15, R17, R19, R27, R29, R3-R4, R16, R18, R20, R28, R30-R31 R12-R14, R32, R47-R48 R33-R46 R49-R53 SW1-SW2
Notes: Vishay: www.vishay.com Johnson Components: www.johnsoncomponents.com. Digi-key: www.digikey.com On-Semi: www.on-semi.com C&K: www.vishay.com MtronPTI: www.mtronpti.com Micrel, Inc.: www.micrel.com.
Part Number VJ0603Y104JXJAT VJ1206Y106JXJAT VJ0402Y104JXJAT VJ0603Y105JXJAT VJ0402Y103JXJAT 142-0711-821 142-0711-201 IMC0805RK122J01 67-1640-1-ND 67-1636-1-ND MMBT3904WT1 CRCW040200R0F CRCW04021270F
Manufacturer Vishay Vishay
Description 0.1µF, ceramic capacitor, size 0603 ceramic capacitor, size 1206 0.1µF, ceramic capacitor, size 0402 1.0µF, ceramic capacitor, size 0603 0.01µF, ceramic capacitor, size 0402 Launch Receptacle connector Connector. Strait Jack Receptacle. Surface Mount. 1.2µH Ferrite bead inductor Green General purpose transistor resistor, size 0402 127, resistor, size 0402
Vishay(1) Vishay(1) Vishay
Johnson Components(2) Johnson Components(2 Vishay(1) Digikey
Digikey(3) Semi Vishay
Vishay(1)
CRCW040282R5F CRCW04021002F CRCW04021002F CRCW04021820F CRCW04025111F CRCW04021002F TDA08H0SB1 5010K-ND 5011K-ND SY87725L SY89322V SY89312V M210024BPN SY87725_EB_R0
Vishay(1) Vishay(1) Vishay
82.5 resistor, size 0402 1.2k, resistor, size 0402 390, resistor, size 0402 182, resistor, size 0402 5.11k, resistor, size 0402 10k, resistor, size 0402 Switch, Test point Multi-purpose, Test point Multi-purpose, Black 2.5Gbps GPON/APON SERDES Dual LVTTL-to-Differential LVPECL Translator LVPECL Clock Divider 155.52MHz Clock Oscillator Bare
Vishay(1) Vishay(1) Vishay(1)
Digikey Digikey
Micrel(7) Micrel(7) Micrel
MtronPTI(6) Micrel
March 2007
M9999-030507-A hbwhelp@micrel.com (408) 955-1690
Micrel, Inc.
SY87725L Evaluation Board
APPENDIX TEST FLOW DIAGRAM SY87725L EVALUATION BOARD
March 2007
M9999-030507-A hbwhelp@micrel.com (408) 955-1690
Micrel, Inc.
SY87725L Evaluation Board
APPENDIX TEST FLOW DIAGRAM SY87725L CONTINUED
March 2007
M9999-030507-A hbwhelp@micrel.com (408) 955-1690
Micrel, Inc.
SY87725L Evaluation Board
Support
Hotline: 408-955-1690 Email Support: HBWHelp@micrel.com
Application Hints Notes
application notes high speed termination PECL LVPECL products, clock synthesizer products, SONET jitter measurement, other High Bandwidth products Micrel's website http://www.micrel.com/. Once Micrel's website, follow steps below: Click "Product Info". Applications Information Box, choose "Application Hints Application Notes."
MICREL, INC. 2180 FORTUNE DRIVE JOSE, 95131
(408) 944-0800 (408) 474-1000 http://www.micrel.com information furnished Micrel this data sheet believed accurate reliable. However, responsibility assumed Micrel use. Micrel reserves right change circuitry specifications time without notification customer. Micrel Products designed authorized components life support appliances, devices systems where malfunction product reasonably expected result personal injury. Life support devices systems devices systems that intended surgical implant into body support sustain life, whose failure perform reasonably expected result significant injury user. Purchaser's sale Micrel Products life support appliances, devices systems Purchaser's risk Purchaser agrees fully indemnify Micrel damages resulting from such sale. 2007 Micrel, Incorporated.
March 2007
M9999-030507-A hbwhelp@micrel.com (408) 955-1690
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