TLK1501 Serdes EVM Kit Setup and Usage User’s Guide June 2000 Mixed Signal Products SLLU008
IMPORTANT NOTICE Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete.
Notational Conventions Preface Read This First About This Manual This manual should be used to determine how to set up and use the TLK1501 evaluation module in order to evaluate the TLK1501 device.
Trademarks - In syntax descriptions, the instruction, command, or directive is in a bold typeface font and parameters are in an italic typeface. Portions of a syntax that are in bold should be entered as shown; portions of a syntax that are in italics describe the type of information that should be entered. Here is an example of a directive syntax: .asect ”section name”, address .asect is the directive. This directive has two parameters, indicated by section name and address. When you use .
Running Title—Attribute Reference Contents 1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 1.2 TLK1501 EVM Kit Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Running Title—Attribute Reference Figures 2–1 2–2 2–3 2–4 2–5 2–6 3–1 A–1 A–2 A–3 A–4 A–5 A–6 A–7 A–8 A–9 A–10 A–11 A–12 A–13 A–14 A–15 A–16 A–17 TLK1501 Serial Loop-Back Test Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 TLK1501 Serial Loop-Back Test Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 TLK1501 Serial PRBS BERT Test Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 1 Introduction The Texas Instruments (TI) TLK1501 serdes evaluation module (EVM) board is used to evaluate the TLK1501 device(VQFP) and associated optical interface (NetLight) for point-to-point data transmission applications. The board enables the designer to connect 50 Ω parallel buses to both transmitter and receiver connectors. The TLK1501, using high speed PLL technology, serializes, encodes (8b/10b) and transmits data along one differential pair.
Introduction 1.1 Introduction The board can be used to evaluate device parameters while acting as a guide for high-speed board layout. The evaluation board can be used as daughter boards that are plugged into new or existing designs. Since the TLK1501 operates over a wide range of frequencies, the designers will need to optimize their design for the frequency of interest.
Chapter 2 TLK1501 EVM Board Configuration The TLK1501 EVM board gives the developer various options for operation, many of which are jumper selectable. Other options can be either soldered into the EVM or connected through input connectors. The TX and RX parallel connectors, J1–J4 of Figures 8 and 10 in Appendix A, provide a connection for both transmitted and received data. The reference clock is supplied through SMA connector J8 and jumper J5 must be installed between pins 1 and 2.
The board is normally delivered in a default configuration that requires external clock and data inputs. The TLK1501 is shipped with jumpers for default operation. Table 2–1 shows the default configuration for sending data. Table 2–1.
Typical Test and Setup Configurations 2.1 Typical Test and Setup Configurations The following configurations are used to evaluate and test the TLK1501 transceiver. The first configuration is a serial loopback of the high-speed signals shown in Figure 2–1. The serial loopback allows the designer to evaluate most of the functions of both transmitter and receiver sections of the TLK1501 device. To test a system, a parallel bit error rate tester (BERT) generates a predefined parallel bit pattern.
Typical Test and Setup Configurations If a parallel BERT is not available, the designer can take advantage of the built-in test mode of the device, see Figure 2–2. If the designer asserts the PRBSEN pin high this results in a pseudorandom bit pattern to be transmitted. This pin also puts the receiver in a mode to detect a valid PRBS pattern. A valid pattern is indicated by the PRBSPASS pin indicating high. This test only validates the high-speed serial portion of the device and system interconnects.
Typical Test and Setup Configurations Figure 2–3.
Typical Test and Setup Configurations Figure 2–4.
Optical Interfacing and Configuration 2.2 Optical Interfacing and Configuration An interface between the TLK1501EVM and an optical transceiver can be achieved in many ways, depending on the design of the optics module and its associated interface circuitry. Direct connection is achieved only if the optical interface supports the current mode logic levels of the TLK1501 device (VDD – 1 V). If the optics module does not support or can not be biased to the CML levels then ac-coupling must be used.
Figure 2–6.
Chapter 3 PCB Construction and Characteristics The PCB characteristics are calculated and based on the layer construction and trace width of the board. This should be useful in determining the proper interface to the EVM and establishing system timing.
Table 3–1. TLK1501 EVM TTL Bus PCB Transmission Line Characteristics Device Pin No./Des. Connector Pin Label Trace Width (inches) Length (inches) Capacitance (pF) Inductance (nH) Impedance (Ω) Line Delay (ps) 62 – TXD0 TD0 0.0118 1.887 5.2 14.1 51.9 272.1 63 – TXD1 TD1 0.0118 1.884 5.2 14.1 51.9 271.7 64 – TXD2 TD2 0.0118 1.904 5.3 14.3 51.9 274.7 2 – TXD3 TD3 0.0118 1.898 5.3 14.2 51.9 273.7 3 – TXD4 TD4 0.0118 1.903 5.3 14.2 51.9 274.4 4 – TXD5 TD5 0.
Figure 3–1. TLK1501 EVM Layer Construction Top 50 Ω Layer 1 14 Mil GND1 Layer 2 5 Mil Layer 3 VDD1 21 Mil VDD2 Layer 4 05 Mil Layer 5 GND2 07 Mil Solder 50 Ω Layer 6 Notes: 1) All cores consist of 1 oz. Cu. 2) Trace width A) 25 mils (for 50 Ω Layer 1) B) 11.8 mils (for 50 Ω Layer 6) 3) Overall board thickness is 62 mils ±5 mil 4) Copper and solder mask adds approximately 10 mils to the overall board thickness. 5) Impedance is 50 Ω ±5% 6) Material is G-Tek. Dielectric constant = 3.
3-4
Appendix A Schematics, Board Layouts, and Suggested Optics and Cable Assembly Specifications This appendix contains schematics and corresponding bill of materials for the TLK1501EVM transceiver board along with board layouts. Specifications for the NetLight 1417K4A 1300 nm laser assembly are also included.
Figure A–1. TLK1501 EVM Transceiver Schematic VDD GND 10u J19 J22 C12 VDD 0.01 C6 0.01 VDDA2 TXP TXN 0.01 C5 0.01 VDDA1 RXP VDDA2 VDDA1 RXN 0.01 0.01 0.01 C38 J13 C4 C39 J14 C40 J17 C41 J23 0.01 C22 C3 VDDA2 0.01 C25 0.01 0.01 C24 C2 C23 0.01 R35 R36 49.9 49.9 0.01 100p R38 R37 C32 100p 49.9 C33 100p C26 49.9 0.01 0.01 C51 VDD C34 C21 100p VDDA2 0.
Figure A–2.
Table A–1.TLK1501 EVM Transceiver Bill of Materials Item Qty Mfg / Dist. Mfg Part No. Ref Des Description Value or Function 1 1 Digi-Key S2011–02–ND J6 2×2 HEADER 0.1 x 0.1 Centers 2 1 Digi-Key S2011–07–ND J7 2×7 HEADER 0.1 x 0.1 Centers 3 4 Digi-Key ECS–T1DX475R J1, J2, J3, J4 2×8 HEADER 0.1 x 0.1 Centers 4 1 Digi-Key S1111–03–ND J5 3 Pin jumper 0.1 Centers 5 4 Newark 39N867 J16,J18,J19, J22 Banana jack 100 V, 5%, 0.
Figure A–3.
Figure A–4.
Figure A–5.
Figure A–6.
Figure A–7.
Figure A–8.
R1 Pin 1 R5 R22 open R21 R23 0 R24 0 R2 R3 R4 Figure A–9.
Figure A–10.
Figure A–11.
Figure A–12.
Figure A–13.
Figure A–14.
Figure A–15.
Figure A–16.
Figure A–17.
A-20 Schematics, Board Layouts, and Suggested Optics and Cable Assembly Specifications
Appendix B NetLight 1417K4A 1300 nm Laser 2.5 Gbits/s SpeedBlaster Transceiver The document shown in this appendix is an advanced information data sheet from Lucent Technologies Inc. Topic Page NetLight 1417K4A 1300 nm Laser 2.5 Gbits/s Speedmaster Transceiver Data Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B–2 Lucent, NetLight, and Speedmaster are a trademarks of Lucent Technologies Inc. NetLight 1417K4A 1300 nm Laser 2.
B-2
NetLight 1417K4A 1300 nm Laser 2.
B-4
NetLight 1417K4A 1300 nm Laser 2.
B-6
NetLight 1417K4A 1300 nm Laser 2.
B-8
NetLight 1417K4A 1300 nm Laser 2.
B-10
NetLight 1417K4A 1300 nm Laser 2.
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