SN65LVCP22-23EVM

SN65LVCP22-23EVM

  • 厂商:

    BURR-BROWN(德州仪器)

  • 封装:

    Module

  • 描述:

  • 数据手册
  • 价格&库存
SN65LVCP22-23EVM 数据手册
  User’s Guide June 2003 HPL Interface SLLU060 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment. TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. Except where mandated by government requirements, testing of all parameters of each product is not necessarily performed. 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Following are URLs where you can obtain information on other Texas Instruments products & application solutions: Products Applications Amplifiers amplifier.ti.com Audio www.ti.com/audio Data Converters dataconverter.ti.com Automotive www.ti.com/automotive DSP dsp.ti.com Broadband www.ti.com/broadband Interface interface.ti.com Digital Control www.ti.com/digitalcontrol Logic logic.ti.com Military www.ti.com/military Power Mgmt power.ti.com Optical Networking www.ti.com/opticalnetwork Microcontrollers microcontroller.ti.com Security www.ti.com/security Telephony www.ti.com/telephony Video & Imaging www.ti.com/video Wireless www.ti.com/wireless Mailing Address: Texas Instruments Post Office Box 655303 Dallas, Texas 75265 Copyright  2003, Texas Instruments Incorporated EVM IMPORTANT NOTICE Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation kit being sold by TI is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not considered by TI to be fit for commercial use. As such, the goods being provided may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including product safety measures typically found in the end product incorporating the goods. As a prototype, this product does not fall within the scope of the European Union directive on electromagnetic compatibility and therefore may not meet the technical requirements of the directive. Should this evaluation kit not meet the specifications indicated in the EVM User’s Guide, the kit may be returned within 30 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user indemnifies TI from all claims arising from the handling or use of the goods. Please be aware that the products received may not be regulatory compliant or agency certified (FCC, UL, CE, etc.). Due to the open construction of the product, it is the user’s responsibility to take any and all appropriate precautions with regard to electrostatic discharge. EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES. TI currently deals with a variety of customers for products, and therefore our arrangement with the user is not exclusive. TI assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or services described herein. Please read the EVM User’s Guide and, specifically, the EVM Warnings and Restrictions notice in the EVM User’s Guide prior to handling the product. This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact the TI application engineer. Persons handling the product must have electronics training and observe good laboratory practice standards. No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine, process, or combination in which such TI products or services might be or are used. Mailing Address: Texas Instruments Post Office Box 655303 Dallas, Texas 75265 Copyright  2003, Texas Instruments Incorporated EVM WARNINGS AND RESTRICTIONS It is important to operate this EVM within the input voltage range between 1.2 V and 3.3 V. Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are questions concerning the input range, please contact a TI field representative prior to connecting the input power. Applying loads outside of the specified output range may result in unintended operation and/or possible permanent damage to the EVM. Please consult the EVM User’s Guide prior to connecting any load to the EVM output. If there is uncertainty as to the load specification, please contact a TI field representative. During normal operation, some circuit components may have case temperatures greater than 60°C. The EVM is designed to operate properly with certain components above 60°C as long as the input and output ranges are maintained. These components include but are not limited to linear regulators, switching transistors, pass transistors, and current sense resistors. These types of devices can be identified using the EVM schematic located in the EVM User’s Guide. When placing measurement probes near these devices during operation, please be aware that these devices may be very warm to the touch. Mailing Address: Texas Instruments Post Office Box 655303 Dallas, Texas 75265 Copyright  2003, Texas Instruments Incorporated Trademarks Preface    About This Manual This user’s guide describes the SN65LVCP22/23 evaluation module (EVM). This guide contains the EVM schematic, bill of materials, assembly drawing, and board layouts. How to Use This Manual This document contains the following chapters: - Chapter 1– Introduction - Chapter 2– Setup and Equipment Required - Chapter 3– EVM Construction - Chapter 4– PCB Fabrication and Bill of Materials This user’s guide may contain cautions and warnings. The information in a caution or a warning is provided for your protection. Please read each caution and warning carefully. Related Documentation From Texas Instruments SN65LVCP22 – LVDS crosspoint switch data sheet (SLLS553) SN65LVCP23 – LVPECL crosspoint switch data sheet (SLLS554) Trademarks Trademarks are the property of their respective owners. v Trademarks Electrostatic Sensitive Devices This EVM contains components that can potentially be damaged by electrostatic discharge. Always transport and store the EVM in its supplied ESD bag when not in use. Handle using an antistatic wristband. Operate on an antistatic work surface. For more information on proper handling, refer to SSYA008. vi Contents   1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 1.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 1.2 Signal Paths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 2 Setup and Equipment Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2 Applying an Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.3 Observing an Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.4 Typical Test Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 EVM Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 3.1 Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 3.2 Board Layout Patterns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4 4 PCB Fabrication and Bill of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 4.1 PCB Fabrication Notes and Stackup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2 4.2 Bill of Materials for SN65LVCP22/23 EVM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2 2-1 2-2 2-3 2-4 2-5 vii Contents   1–1 1–2 1–3 2–1 2–2 2–3 3–1 3–2 3–3 3–4 3–5 3–6 3–7 Functional Configurations of the SN65LVCP22 and SN65LVCP23 . . . . . . . . . . . . . . . . . . . SN65LVCP22/23 EVM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SN65LVCP22/23 EVM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . EVM Power Connections for SN65LVCP22/23 Evaluation—With LVDS Inputs . . . . . . . . External Termination for Interfacing CML or LVPECL Drivers . . . . . . . . . . . . . . . . . . . . . . . . Typical Test Results of the SN65LVCP23 with the SN65LVCP22/23EVM . . . . . . . . . . . . . SN65LVCP22D Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SN65LVCP23D Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SN65LVCP22/23 Silk Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Layer 1 – Signal Plane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Layer 2 – GND Plane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Layer 3 – Split Plane (VCC/VCC01) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Layer 4 – GND Plane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 1-2 1-3 2-2 2-3 2-5 3-2 3-3 3-4 3-4 3-5 3-5 3-6  2–1 viii Crosspoint Function Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 Chapter 1    The SN65LVCP22/23 EVM highlights the high-speed performance and functionality of the SN65LVCP22 and SN65LVCP23 2x2 crosspoint switches. Topic Page 1.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 1.2 Signal Paths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 Introduction 1-1 Overview 1.1 Overview The SN65LVCP22 (LVDS output) and SN65LVCP23 (LVPECL output) are high-speed 2x2 crosspoint switches. The four different functions that these crosspoints provide are shown in Figure 1–1. The functions of these crosspoints are selected via pins SEL0 and SEL1. Control pins EN0 and EN1 enable or disable the outputs. The receiver has a wide input common-mode voltage range with an ability to accept LVDS, LVPECL and CML signaling levels. Figure 1–1. Functional Configurations of the SN65LVCP22 and SN65LVCP23 IN0+ OUT0+ IN0+ OUT0+ IN0– OUT0– IN0– OUT0– IN1+ OUT1+ IN1+ OUT1+ IN1– OUT1– IN1– 2x2 Crosspoint IN+ (1 OR 2) IN– OUT1– Dual Repeater OUT0+ IN0+ OUT0– IN0– MUX 1:2 Splitter OUT1+ IN1+ OUT1– IN1– OUT+ (1 OR 2) OUT– 2:1 MUX Figure 1–2 is a picture of the SN65LVCP22/23 EVM. The EVM part number is SN65LVCP22/23EVM. The EVM comes with the SN65LVCP22D and SN65LVCP23D (SOIC both) installed. A copy of the datasheet is shipped with the EVM. The latest version of the datasheet is available from www.ti.com. Figure 1–2. SN65LVCP22/23 EVM 1-2 Signal Paths 1.2 Signal Paths The signal paths on this EVM include 16 edge-launch SMA connectors (J1–J16) for high-speed data transmission, 4 jumpers (JMP1, JMP2 for DUT1and JMP5, JMP6 for DUT2) for active switch logic control, 4 jumpers (JMP3, JMP4 for DUT1and JMP7, JMP8 for DUT2) for enabling and disabling the outputs, and three banana jacks (J17, J18, J19) for power and ground connections. See Figure 1–3. J10 J11 J12 J1 DUTGND VCC01 R3 uninstalled R4 J5 GND 68µF 1µF 68µF 1µF 0.1µF 0.1µF 0.010µF 0.010µF 10µF 10µF C 11 DUT1 R2 J19 J18 J3 VCC C1 C2 C3 C4 C5 J17 100 Ω R1 0.010µF JMP4 J2 uninstalled R6 uninstalled R5 R7 R8 EN0 uninstalled uninstalled SEL1 EN1 JMP3 JMP1 1 J9 J6 C6 C7 C8 C9 C10 100 Ω R10 0.010µF VCC JMP2 R11 uninstalled R12 SEL0 GND 100 Ω R19 100 Ω J7 { C 17 DUT2 16 JMP8 JMP7 J8 1 JMP6 J13 61 VCC 1 { GND JMP5 uninstalled R15 R14 uninstalled R13 R16 J14 EN0 uninstalled J15 EN1 SEL0 J16 SEL1 uninstalled Figure 1–3. SN65LVCP22/23 EVM J4 {GND is tied to Vcc01 Introduction 1-3 1-4 Chapter 2       Topic Page 2.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 2.2 Applying an Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 2.3 Observing an Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4 2.4 Typical Test Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5 Setup and Equipment Required 2-1 Overview 2.1 Overview The output characteristics of the SN65LVCP23 (LVPECL) drivers are generally loaded with 50-Ω resistors to a termination bias voltage, VTT. VTT is usually 2 V below the supply voltage of the driver circuit. When the driver operates from a 3.3-V supply, VTT is set to approximately 1.3 V. The output characteristics of the SN65LVCP22 are specified in the TIA/EIA-644 standard. LVDS drivers nominally provide a 350-mV differential signal, with a 1.25–V offset from ground. These levels are attained when driving a 100-W differential line-termination test load. This requirement includes the effects of up to 32 standard receivers with their ground reference up to 1 V different from that of the driver. This common-mode loading limitation of LVDS drivers affects how they are observed and much of the test setup that follows.. The EVM is designed to support the SN65LVCP22 LVDS output device as well as the SN65LVCP23 LVPECL output device. By using the three power jacks (J17, J18, J19), as well as installing termination resistors (R3–R8 and R11–R16), different methods of termination and probing can be used to evaluate the device output characteristics. The typical setup for the SN65LVCP22 is shown in Figure 2–1. Figure 2–1. EVM Power Connections for SN65LVCP22/23 Evaluation—With LVDS Inputs + Power Supply #1 3.3 V – + Power Supply #2 1.2 V – Pattern Generator J19 OUTPUT 1 OUTPUT 1 J1 or J9 J2 or J10 J18 J17 GND VCC VCC01 (DUT GND) (EVM GND) R1 or R19 100 Ω J8 or J16 J7 or J15 CH1 50 Ω CH2 50 Ω OUTPUT 2 J3 or J11 J4 or J12 J6 or J14 R2 or R10 100 Ω CH3 50 Ω J5 or J13 CH4 50 Ω OUTPUT 2 SN65LVCP22/23 EVM Oscilloscope 2-2 Applying an Input 2.2 Applying an Input When using a general-purpose signal generator with 50-Ω output impedance, make sure that the signal levels are between 0-V and 4-V with respect to J19, device under test ground (DUT GND), designated as Vcc01. Inputs should be applied to the SMA connectors J1, J2, J3, and J4 for DUT1 (or J9, J10, J11 and J12 for DUT2). Matched cable lengths must be used when connecting the signal generator to the EVM to avoid inducing skew between the noninverting and inverting inputs. The EVM comes with 100-Ω resistors installed across the differential inputs for LVDS termination. The simple 100-Ω terminations do not provide the necessary termination for LVPECL or CML[1] output structures. In order to interface the SN65LVCP22/23 EVM with CML or LVPECL drivers, external terminations are required. Figure 2–2 shows an example termination for LVPECL and CML output structures. Remove resistors R1, R2, R10 and R19 when using the external terminations. Figure 2–2. External Termination for Interfacing CML or LVPECL Drivers VTT for LVPECL VCC for CML 50 Ω IN+ LVPECL or CML Driver EVM (Inputs 1 or 2) IN– 50 Ω VTT for LVPECL VCC for CML The use of external resistors creates a significant stub between the termination and the actual device receivers. The user needs to verify that the transition time of the input signal, coupled with the stub length, does not lead to reflection problems. In normal applications, the termination would be placed as close as possible to the device inputs to minimize reflections. The control lines SEL0 and SEL1 require LVTTL levels and are stimulated by the Vcc power supply, via jumpers JMP1 and JMP2 (DUT1) and JMP5 and JMP6 (DUT2). Table 2–1 shows the different functions and the control line settings for each. [1]CML is not a standardized physical layer and therefore the output structures and required termination differ from vendor to vendor. Setup and Equipment Required 2-3 Observing an Output Table 2–1. Crosspoint Function Table SEL0 SEL1 OUT0 OUT1 Function 0 0 IN0 IN0 1:2 Splitter 0 1 IN0 IN1 Repeater 1 0 IN1 IN0 Switch 1 1 IN1 IN1 1:2 Splitter 2.3 Observing an Output Direct connection to an oscilloscope with 50–Ω internal terminations to ground is accomplished without R3–R8 (DUT1) and R11–R16 (DUT2) installed. The outputs are available at J5–J8 (DUT1) and J13–J16 (DUT2) for direct connection to oscilloscope inputs. Matched cable lengths must be used when connecting the EVM to a scope to avoid inducing skew between the noninverting (+) and inverting (–) outputs. The three power jacks (J17, J18, J19) are used to provide power and a ground reference for the EVM. The power connections to the EVM determine the common-mode load to the device. As mentioned earlier, LVDS drivers have limited common-mode driver capability. When connecting the EVM outputs directly to oscilloscope inputs, setting of the oscilloscope common-mode offset voltage is required, as the oscilloscope presents low common-mode load impedance to the device. Returning to Figure 2–1, power supply 1 is used to provide the required 3.3 V to the EVM. Power supply 2 is used to offset the EVM ground relative to the DUT ground. The EVM ground is connected to the oscilloscope ground through the returns on SMA connectors J5–J8 (DUT1) and J13–J16 (DUT2). With power applied as shown in Figure 2–1, the common-mode voltage seen by the SN65LVCP22 is approximately equal to the reference voltage being used inside the device, preventing significant common-mode current to flow. Optimum device setup can be confirmed by adjusting the voltage on power supply 2 until its current is minimized. It is important to note that use of the dual supplies and offsetting the EVM ground relative to the DUT ground are simply steps needed for the test and evaluation of devices. Actual designs include high-impedance receivers, which do not require the setup steps outlined above. LVPECL drivers need a 50-Ω termination to VTT. A modification of Figure 2–1 and the above instructions are used when evaluating an SN65LVCP23 with a direct connection to a 50-Ω oscilloscope. With power supply 1 in Figure 2–1 set to 3.3 V, power supply 2 should be set to 1.3 V (2 V below Vcc) to provide the correct termination voltage. If the outputs are to be evaluated with a high-impedance probe, direct probing on the EVM board is supported via installation of a 50-Ω resistor across the solder pads for R6 and R8, and another 50-Ω resistor across the solder pads for R3 and R5 for DUT1. Or, LVDS outputs can be observed by installing a 100-W resistor at R4, R7, R12, or R15. LVPECL outputs can be observed by installing R3, R5, R11, R13, R14, and R16 (49.9-Ω resistors) and setting power supply #2 to 1.3 V. (Note that power supply #2 must be able to sink current.) 2-4 Typical Test Results 2.4 Typical Test Results Figure 2–3 is a typical result obtained with the EVM setup shown in Figure 2–1. The upper waveform is the difference voltage between channels 1 and 2 of the oscilloscope and the lower trace is the difference voltage between channels 3 and 4. The DUT was configured to send the IN0+/IN0– inputs to the outputs OUT0+/OUT0– and inputs IN1+/IN1– to outputs OUT1+/OUT1– by setting EN0 and EN1 to a high level and by setting SEL0 to Gnd and SEL1 to Vcc. The stimuli were a 223–1 PRBS to J1 and J2 at 1.3 Gbps, and a 650 MHz clock to J3 and J4. The input levels for both clock and data were a differential voltage of 400 mV, with a common-mode voltage of 0 V (referenced to the ground of the pattern generator). Figure 2–3. Typical Test Results of the SN65LVCP23 with the SN65LVCP22/23EVM 1.3 Gbps 223 –1 PRBS OUTPUT 1 VCC = 3.3 V |VID| = 200 mV, VIC = 1.2 V Vertical Scale=400mV/div 650 MHz OUTPUT 2 Horizontal Scale = 200 ps Setup and Equipment Required 2-5 Chapter 3     Topic Page 3.1 Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 3.2 Board Layout Patterns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4 EVM Construction 3-1 3-2 J4 J3 J2 J1 VCC01 1 GND GND GND GND R1 100 Ω R2 100 Ω JMP1 3pin_berg 2 3 VCC VCC01 VCC VCC VCC 2 C11 .010µF VCC 1 JMP2 3pin_berg 3 8 7 6 5 4 3 2 1 NC OUT1– OUT1+ GND OUT0– OUT0+ EN1 VCC SN65LVCP22D NC IN1+ IN1– VCC IN0– IN0+ SEL0 9 10 11 12 13 14 15 16 VCC EN0 DUT1 SEL1 VCC 1 JMP4 3 10µF C6 R5 UNINSTALLED R3 R4 J6 GND J5 GND 68 µF C7 68 µF C2 JMP3 3pin_berg 2 1 3 ++ 10µF C1 + UNINSTALLED VCC01 VCC VCC01 UNINSTALLED VCC01 2 3pin_berg + R8 0.1 µF C9 0.1 µF C4 C5 R7 0.001 µF C10 0.001 µF UNINSTALLED R6 UNINSTALLED UNINSTALLED VCC01 1µF C8 1µF C3 GND VCC J19 J18 J17 GND J7 GND J8 VCC01 VCC01 VCC Schematics 3.1 Schematics Figure 3–1. SN65LVCP22D Schematic J12 J11 J10 J9 VCC01 GND GND GND GND 1 2 JMP5 3pin_berg 3 100Ω R10 100Ω R19 VCC VCC01 1 3 8 GND SN65LVCP23D VCC OUT1– 7 IN1– GND OUT0– OUT0+ EN1 EN0 OUT1+ VCC IN0– IN0+ SEL0 SEL1 DUT2 VCC IN1+ 6 5 4 3 2 1 VCC C17 .010 µ F VCC VCC VCC 2 JMP6 3pin_berg 9 10 11 12 13 14 15 16 1 3 VCC VCC01 2 JMP8 3pin_berg 1 VCC01 3 R13 EVM Construction UNINSTALLED R11 UNINSTALLED R12 VCC01 UNINSTALLED 2 JMP7 3pin_berg VCC01 J13 J14 UNINSTALLED R14 UNINSTALLED UNINSTALLED R16 R15 GND J15 GND J16 Schematics Figure 3–2. SN65LVCP23D Schematic 3-3 Board Layout Patterns 3.2 Board Layout Patterns Figure 3–3. SN65LVCP22/23 Silk Screen Figure 3–4. Layer 1 – Signal Plane 3-4 Board Layout Patterns Figure 3–5. Layer 2 – GND Plane Figure 3–6. Layer 3 – Split Plane (VCC /VCC01 ) EVM Construction 3-5 Board Layout Patterns Figure 3–7. Layer 4 – GND Plane 3-6 Chapter 4            Topic Page 4.1 PCB Fabrication Notes and Stackup . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2 4.2 Bill of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2 PCB Fabrication and Bill of Materials 4-1 PCB Fabrication Notes and Stackup 4.1 PCB Fabrication Notes and Stackup Notes: 1) All fabrication items must meet or exceed best industry practice. IPC–A 600C (Commercial Std.) 2) Laminate material NELCO N4000–13 [DO NOT USE–13SI] 3) Copper weight: 1 oz start internal and 1/2 oz start external Stackup Signal: Layer 1 4) Finished board thickness: 0.62” ±0.10” 0.008” 5) Maximum warp and twist to be 0.005 inch per inch GND: Layer 2 6) Minimim copper wall thickness of plate-through holes 0.002 inch 7) Minimum annular ring of plate-through holes to be 0.001 inch 0.040” Split Power: Layer 3 8) Minimum allowable line reduction to be 20% or 0.002 inch whichever is greater 0.008” GND: Layer 4 9) 0.0125 inch signal lines on layer 1 to be impednace controlled 100 W to each other ±10% 10)Dielectric constants are core 3.9 11) Fill vias that are in a pad are prepreg 3.9 4.2 Bill of Materials for SN65LVCP22/23 EVM Comment Quantity Components 10 µF, 35V, 10% 2 C1, C6 68 µF, 10 V, 20%, Low ESR 2 C2, C7 1 µF, 25 V +80% –20% 2 C3, C8 0.1 µF, 50 V, 5% 2 C4, C9 0.001 µF, 25 V, 5% 2 C5, C10 0.01 µF, 50 V, ±10% 2 C11, C17 SN65LVCP22D 1 DUT1 SN65LVCP23D 1 DUT2 3POS_JUMPER 8 JMP1, JMP2, JMP3, JMP4, JMP5, JMP6, JM7, JMP8 SMA_PCB_MT_MOD 16 J1, J2, J3, J4, J5, J6, J7, J8, J9, J10, J11, J12, J13, J14, J15, J16 Banana Jack 3 J17, J18, J19 100 Ω, 1/4 Watt, 1% 4 R1, R2,R10,R19 49.9 Ω, 1/4 Watt, 1% (uninstalled) 12 R3, R4, R5, R6, R7, R8, R11, R12, R13, R14, R15, R16 4-2
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