National Semiconductor CLINK3V28BT-85 User Manual Download Page 1

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Channel Link Evaluation Kit User Manual

National Semiconductor Corporation

Interface Products

LIT# CLINK3V28BT-85-UM
Rev 2.1
Date: 10/12/2005
Page 1 of 28

Channel Link Demonstration Kit

User Manual

P/N CLINK3V28BT-85

Rev 2.1

Interface Products

Summary of Contents for CLINK3V28BT-85

Page 1: ...ion Kit User Manual National Semiconductor Corporation Interface Products LIT CLINK3V28BT 85 UM Rev 2 1 Date 10 12 2005 Page 1 of 28 Channel Link Demonstration Kit User Manual P N CLINK3V28BT 85 Rev 2 1 Interface Products ...

Page 2: ...BOARDS OVERVIEW 5 TRANSMITTER BOARD 6 SELECTABLE JUMPER SETTINGS FOR THE TX BOARD 6 LVDS MAPPING BY IDC CONNECTOR 6 TX OPTIONAL PARALLEL TERMINATION FOR TXIN 9 BOM BILL OF MATERIALS 10 RECEIVER BOARD 11 SELECTABLE JUMPER SETTINGS FOR THE RX BOARD 12 LVDS MAPPING BY IDC CONNECTOR 13 RX OPTIONAL SERIES TERMINATION FOR RXOUT 14 BOM BILL OF MATERIALS 15 TROUBLESHOOTING 19 ADDITIONAL INFORMATION 20 APP...

Page 3: ...s from an incoming data source along with the clock signal The LVDS Transmitter converts the LVTTL LVCMOS parallel lines into four serialized LVDS data pairs plus a LVDS clock The serial data streams toggle at 3 5 times the clock rate The Receiver board accepts the LVDS serialized data streams plus clock and converts the data back into parallel LVTTL LVCMOS data signals and clock The user simply n...

Page 4: ... DS90CR287 RX DS90CR288A RxOUT 0 1 2 25 26 27 TxIN 0 1 2 25 26 27 TxCLK PD PD LVCMOS LVTTL The diagram above illustrates the use of the Channel Link chipset Tx Rx This chipset is able to transmit 28 bits of LVTTL LVCMOS data using four LVDS channels for a total throughput of 2 38 Gbps 297 5 Mbytes s Input clock rate is specified to be between 20 MHz to 85 MHz maximum The interconnect between the t...

Page 5: ...able from the receiver board to the receiver load BERT or other equipment Scope probes may also be connected directly to the pins if desired Mini coax cable with headers on one end may also be used This type of cable is supplied with some test equipment The 60 pin IDC equipment interface cable is supplied with this kit which can be used to build custom cables 4 Power for the Tx and Rx boards must ...

Page 6: ... provides the interface for LVDS signals for the Receiver board Vcc and Gnd MUST be applied externally here 1 2 GND TXIN0 GND TXIN1 GND TXIN2 GND TXIN3 GND TXIN4 GND TXIN5 GND TXIN6 GND TXIN7 GND TXIN8 GND TXIN9 GND TXIN10 GND TXIN11 GND TXIN12 GND TXIN13 GND TXIN14 GND TXIN15 GND TXIN16 GND TXIN17 GND TXIN18 GND TXIN19 GND TXIN20 GND TXIN21 GND TXIN22 GND TXIN23 GND TXIN24 GND TXIN25 GND TXIN26 G...

Page 7: ...on Interface Products LIT CLINK3V28BT 85 UM Rev 2 1 Date 10 12 2005 Page 7 of 28 Jumper Settings for the Tx Board Jumper Purpose Settings PD PowerDown ON OFF JP2 Vcc GND Vcc GND ON Tx is operational OFF Tx powers down Default setting is JP2 set HIGH to Vcc operational mode ...

Page 8: ...ND TXIN15 GND TXIN16 GND TXIN17 GND TXIN18 GND TXIN19 GND TXIN20 GND TXIN21 GND TXIN22 GND TXIN23 GND TXIN24 GND TXIN25 GND TXIN26 GND TXIN27 GND TXCLKIN GND GND J1 TXOUT3 TXOUT1 TXOUT2 60 pin IDC Connector Transmitter Board Previous Cycle Next Cycle TXOUT3 TXOUT2 TXOUT1 TXOUT0 TXCLKOUT TXIN23 TXIN17 TXIN16 TXIN11 TXIN10 TXIN5 TXIN27 TXIN26 TXIN25 TXIN24 TXIN22 TXIN21 TXIN20 TXIN19 TXIN18 TXIN15 T...

Page 9: ... termination R1 TO R28 are associated with the Tx data input lines R29 is associated with CLKIN Some test equipment may require a 50 Ohm load Mapping of Transmitter Inputs for the Optional Termination Resistors is shown below Tx Pin Names Tx Pin Number Termination Resistor TxIN0 51 R1 TxIN1 52 R2 TxIN2 54 R3 TxIN3 55 R4 TxIN4 56 R5 TxIN5 2 R6 TxIN6 3 R7 TxIN7 4 R8 TxIN8 6 R9 TxIN9 7 R10 TxIN10 8 R...

Page 10: ... Part Pkg Size 1 1 C1 10 µF CASE D 2 4 C2 C6 C10 C14 0 1 µF 1206 3216 3 4 C3 C7 C11 C15 22 µF 7343 D 4 3 C4 C8 C12 0 001 µF 0805 2012 5 3 C5 C9 C13 0 01 µF 0805 2012 6 2 JP2 3_PIN_HEADER 0 1 spacing 7 1 J1 IDC30X2 IDC60 8 1 J2 3M_MDR 26MDR 9 29 R1 R2 R3 R4 R5 R6 R7 R8 Optional 0402 PAD R9 R10 R11 R12 R13 R14 R15 R16 R17 R18 R19 R20 R21 R22 R23 R24 R25 R26 R27 R28 R29 10 8 R30 R32 R33 R34 R35 0 Ohm...

Page 11: ...J2 provides the interface for LVDS signals for the Receiver board Vcc and Gnd MUST be applied externally here RxIN LVDS signals 3M MDR26 7 connector PD 60 59 RXOUT27 GND RXOUT26 GND RXOUT25 GND RXOUT24 GND RXOUT23 GND RXOUT22 GND RXOUT21 GND RXOUT20 GND RXOUT19 GND RXOUT18 GND RXOUT17 GND RXOUT16 GND RXOUT15 GND RXOUT14 GND RXOUT13 GND RXOUT12 GND RXOUT11 GND RXOUT10 GND RXOUT9 GND RXOUT8 GND RXOU...

Page 12: ...erface Products LIT CLINK3V28BT 85 UM Rev 2 1 Date 10 12 2005 Page 12 of 28 Selectable Jumper Settings for the Rx Board Jumper Purpose Settings PD PowerDown ON OFF JP1 Vcc GND Vcc GND ON Rx is operational OFF Rx powers down Default setting is JP1 set HIGH to Vcc operational mode ...

Page 13: ... RXOUT16 GND RXOUT15 GND RXOUT14 GND RXOUT13 GND RXOUT12 GND RXOUT11 GND RXOUT10 GND RXOUT9 GND RXOUT8 GND RXOUT7 GND RXOUT6 GND RXOUT5 GND RXOUT4 GND RXOUT3 GND RXOUT2 GND RXOUT1 GND RXOUT0 GND RXCLKOUT GND GND GND J1 60 pin IDC Connector RxIN LVDS signals 3M MDR connector Receiver Board RXIN3 RXIN2 RXIN0 RXIN0 RXIN1 RXIN2 RXIN1 RXIN1 PIN NAME 1 NC 2 GND 3 NC 4 CLK 5 CLK 6 NC 7 NC 8 GND 9 NC 10 G...

Page 14: ...to R28 are associated with the DATA output lines R29 is associated with CLKOUT The total load presented to the receiver output is 500 Ohms 450 50 The waveform on the scope is 1 10 of the signal due to the resulting voltage divider 50 450 50 Optional Series Termination Resistor mapping is shown below Rx Pin Names Rx Pin Number Series Termination Resistor RxOUT0 27 R28 RxOUT1 29 R27 RxOUT2 30 R26 Rx...

Page 15: ...F CASE D 2 4 C2 C6 C10 C14 0 1 µF 1206 3216 3 4 C3 C7 C11 C15 22 µF 7343 D 4 3 C4 C8 C12 0 001 µF 0805 2012 5 3 C5 C9 C13 0 01 µF 0805 2012 6 1 JP1 3_PIN_HEADER 0 1 spacing 7 1 J1 IDC30X2 IDC60 8 1 J2 3M_MDR 26MDR 9 29 R1 R2 R3 R4 R5 R6 R7 R8 Optional 0402 PAD R9 R10 R11 R12 R13 R14 See previous page R15 R16 R17 R18 R19 R20 R21 R22 R23 R24 R25 R26 R27 R28 R29 6 R35 R36 R37 R38 R39 R40 0 Ohm 0402 1...

Page 16: ...source and receiver 4 Any other signal pattern generator that generates the correct input levels as specified in the datasheet The following is a list of typically test equipment that may be used to monitor the output signals from the RX 1 TEK MB100 BERT Receiver 2 Any SCOPE with 50 Ohm inputs or high impedance probes LVDS signals may be easily measured with high impedance high bandwidth different...

Page 17: ... 2005 Page 17 of 28 Typical Waveshapes LVDS The plot above shows both the LVDS Data channel with PRBS data and also the LVDS Clock over laid Note that the clock pattern is 4 bit times HIGH and 3 bit times LOW The differential signal should be typically 300mV These waveforms were acquired using the TEK P6248 Probes Clock rate is 85MHz ...

Page 18: ...te 10 12 2005 Page 18 of 28 RxOUT The plot above shows both the recovered PRBS data and also the regenerated Clock overlaid Note that the clock transitions slightly before the data transition and strobes the data on the rising edge of the clock The data and clock signals are low drive 3V CMOS outputs The plot above is at 85MHz ...

Page 19: ...of the clock 4 Check that the Jumpers are set correctly 5 Check that the 2 meter cable is properly connected TROUBLESHOOTING CHART Problem Solution There is only the output clock There is no output data Make sure the data is applied to the correct input pin Make sure data is valid at the input No output data and clock Make sure Power is on Input data and clock are active and connected correctly Ma...

Page 20: ... National s LVDS website at www national com appinfo lvds Application Notes AN 1041 Channel Link Moving and Shaping Information in Point to Point Applications AN 971 An Overview of LVDS technology AN 977 LVDS Signal Quality Jitter Measurement Using Eye Pattern AN 1059 High Speed Transmission with LVDS Devices AN 1108 Channel Link PCB and Interconnect Design In Guidelines Interface Applications Hot...

Page 21: ...full description of the cable and connector For product request please contact 3M and Alliance Technology Enterprise 3M Connector Data is available at www mmm com Interconnects Spectra Strip Cable Data is available at www alliancet com Tx PCB Schematic Transmitter Board HSL Demo Board Schematic Document Number HSL8TX Rev 1 0 Rx PCB Schematic Receiver Board HSL Demo Board Schematic Document Number ...

Page 22: ...DUCT BEFORE USING USER SHALL DETERMINE THE SUITABILITY OF THE PRODUCT FOR HIS INTENDED USE AND USER AS SUMES ALL RISK AND LIABILITY WHATSOEVER IN CONNECTION THEREWITH NO STATEMENT OR RECOMMENDATION NOT CONTAINED HEREIN SHALL HAVE ANY FORCE OR EFFECT UNLESS IN AN AGREEMENT SIGNED BY OF FICERS OR SELLER AND MANUFACTURER Date Issued February 5 1998 TS 0755 05 Sheet 1 of 3 Physical Insulation Material...

Page 23: ...2 625 15 88 795 20 2 40 10240 1210 VE 1 85 47 1 1 581 40 15 1 150 29 21 975 24 77 1 150 29 2 Inch mm 005 1 01 Tolerance Unless Noted 0 00 000 Inch Dimensions for Reference only Position 1 C B A 189 4 80 last position E D 2X M2 5 Thread see note in ordering info 102XX 1210VE Contact Quantity See Table Ordering Information TS 0755 05 Sheet 2 of 3 394 10 00 203 5 15 138 3 5 025 0 635 010 nom 0 25 19 ...

Page 24: ...nel thickness 079 2 00 Max TS 0755 05 Sheet 3 of 3 A C 025 0008 B Connector Position Top Row 20 10 9 8 7 19 18 17 16 15 14 13 12 11 6 5 4 3 2 1 PCB Ref Edge 20 Pos 23 10 9 8 7 22 21 20 19 18 17 16 15 14 6 5 4 3 2 1 30 10 9 8 7 29 28 27 26 25 24 23 22 21 6 5 4 3 2 1 PCB Ref Edge PCB Ref Edge 40 20 39 38 37 36 35 34 33 32 31 11 26 25 24 13 12 11 26 Pos 40 Pos 19 18 17 16 15 14 13 12 Solder Tail Layo...

Page 25: ...Skew Clear twin ax Part number MDR26 5 6 5 Cable length Connector type 6 5 Ft 2 meter Number of twin Ax pairs 5 Connector number of positions 26 Cable assemby ordering information Alliance Technology Enterprise 521 Central Ave Suite B Menlo Park CA 94025 650 329 8554 info allianceT com www AllianceT com ...

Page 26: ... RxIn2 7 TxOut2 20 RxIn2 8 Reserved 19 Reserved 9 No Connect 18 No Connect 10 TxClkoutGnd 17 RxInClkGnd 11 No Connect 16 No Connect 12 TxOut3 15 RxIn3 13 Txout3 14 Rxin3 14 TxOut0 13 RxIn0 15 TxOut0 12 Rxin0 16 No Connect 11 No Connect 17 TxOut1Gnd 10 RxIn1Gnd 18 No Connect 9 No Connect 19 TxOut2gnd 8 Rxin2Gnd 20 Reserved 7 Reserved 21 Reserved 6 Reserved 22 TxClkOut 5 RxClkIn 23 TxClkOut 4 RxClkI...

Page 27: ...35 R34 R23 R12 R17 J2 3M_MDR_EZ8B 1 14 2 15 3 16 4 17 5 18 6 19 7 20 8 21 9 22 10 23 11 24 12 25 13 26 27 28 NC TXOUT0 TXOUT0GND TXOUT0 NC NC TXOUT1 TXOUT1GND TXOUT1 NC TXOUT2 TXOUT2GND TXOUT2 NC NC NC NC TXCLKOUT TXCLKOUTGND TXCLKOUT NC NC TXOUT3 TXOUT3GND TXOUT3 NC MOUNTING MOUNTING R18 R7 R16 R5 R21 R2 R13 R27 R11 R1 R24 R3 R28 R6 R14 R4 R19 R20 R25 R9 R15 R22 R29 R10 R8 R26 J1 IDC30X2 1 2 3 4 ...

Page 28: ...C13 0 01uF R32 100 R40 R39 R33 100 TP2 TP_ 2 X 2 C1 10uF R30 100 R31 100 R38 C2 0 1uF R34 100 J2 3M_MDR_EZ8B 26 13 25 12 24 11 23 10 22 9 21 8 20 7 19 6 18 5 17 4 16 3 15 2 14 1 27 28 NC RXIN0 RXIN0GND RXIN0 NC NC RXIN1 RXIN1GND RXIN1 NC RXIN2 RXIN2GND RXIN2 NC NC NC NC RXCLKIN RXCLKINGND RXCLKIN NC NC RXIN3 RXIN3GND RXIN3 NC MOUNTING MOUNTING R5 R6 R18 R4 R8 R23 R26 U1 DS90CR288 17 18 19 20 21 22...

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