SLLS573E December   2003  – March 2024 SN65MLVD200A , SN65MLVD202A , SN65MLVD204A , SN65MLVD205A

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    3. 6.3  Recommended Operating Conditions
    4. 6.4  Thermal Information
    5. 6.5  Electrical Characteristics
    6. 6.6  Electrical Characteristics – Driver
    7. 6.7  Electrical Characteristics – Receiver
    8. 6.8  Electrical Characteristics – BUS Input and Output
    9. 6.9  Switching Characteristics – Driver
    10. 6.10 Switching Characteristics – Receiver
    11. 6.11 Typical Characteristics
  8. 7 Parameter Measurement Information
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Power-On Reset
      2. 8.3.2 ESD Protection
    4. 8.4 Device Functional Modes
      1. 8.4.1 Device Function Tables
      2. 8.4.2 Equivalent Input and Output Schematic Diagrams
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1  Supply Voltage
        2. 9.2.2.2  Supply Bypass Capacitance
        3. 9.2.2.3  Driver Input Voltage
        4. 9.2.2.4  Driver Output Voltage
        5. 9.2.2.5  Termination Resistors
        6. 9.2.2.6  Receiver Input Signal
        7. 9.2.2.7  Receiver Input Threshold (Failsafe)
        8. 9.2.2.8  Receiver Output Signal
        9. 9.2.2.9  Interconnecting Media
        10. 9.2.2.10 PCB Transmission Lines
      3. 9.2.3 Application Curves
  11. 10Power Supply Recommendations
  12. 11Layout
    1. 11.1 Layout Guidelines
      1. 11.1.1 Microstrip Versus Stripline Topologies
      2. 11.1.2 Dielectric Type and Board Construction
      3. 11.1.3 Recommended Stack Layout
      4. 11.1.4 Separation Between Traces
      5. 11.1.5 Crosstalk and Ground Bounce Minimization
      6. 11.1.6 Decoupling
    2. 11.2 Layout Example
  13. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Support Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  14. 13Revision History
  15. 14Mechanical, Packaging, and Orderable Information

11.1.3 Recommended Stack Layout

Following the choice of dielectrics and design specifications, the designer must decide how many levels to use in the stack. To reduce the TTL/CMOS to M-LVDS crosstalk, it is a good practice to have at least two separate signal planes as shown in Figure 11-3.

SN65MLVD200A SN65MLVD202A SN65MLVD204A SN65MLVD205A Four-Layer PCB BoardFigure 11-3 Four-Layer PCB Board
Note:

The separation between layers 2 and 3 must be 127 μm (0.005 in). By keeping the power and ground planes tightly coupled, the increased capacitance acts as a bypass for transients.

One of the most common stack configurations is the six-layer board, as shown in Figure 11-4.

SN65MLVD200A SN65MLVD202A SN65MLVD204A SN65MLVD205A Six-Layer PCB BoardFigure 11-4 Six-Layer PCB Board

In this particular configuration, it is possible to isolate each signal layer from the power plane by at least one ground plane. The result is improved signal integrity; however, fabrication is more expensive. Using the 6-layer board is preferable because it offers the layout designer more flexibility in varying the distance between signal layers and referenced planes, in addition to ensuring reference to a ground plane for signal layers 1 and 6.