SLLSF55A March   2018  – May 2018 SN65LVDS93B

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      RGB Video System Using Discrete LVDS TX
  4. 4 Revision History
  5. 5 Description (continued)
  6. 6 Pin Configuration and Functions
    1.     Pin Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Timing Requirements
    7. 7.7 Switching Characteristics
    8. 7.8 Typical Characteristics
  8. 8 Parameter Measurement Information
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 TTL Input Data
      2. 9.3.2 LVDS Output Data
    4. 9.4 Device Functional Modes
      1. 9.4.1 Input Clock Edge
      2. 9.4.2 Low Power Mode
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
        1. 10.2.2.1 Power
        2. 10.2.2.2 Signal Connectivity
        3. 10.2.2.3 PCB Routing
      3. 10.2.3 Application Curve
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
      1. 12.1.1 Board Stackup
      2. 12.1.2 Power and Ground Planes
      3. 12.1.3 Traces, Vias, and Other PCB Components
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Documentation Support
      1. 13.1.1 Related Documentation
    2. 13.2 Receiving Notification of Documentation Updates
    3. 13.3 Community Resources
    4. 13.4 Trademarks
    5. 13.5 Electrostatic Discharge Caution
    6. 13.6 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

12.1.1 Board Stackup

There is no fundamental information about how many layers should be used and how the board stackup should look. Again, the easiest way the get good results is to use the design from the EVMs of TI. The magazine Elektronik Praxis has published an article with an analysis of different board stackups. These are listed in Table 4. Generally, the use of microstrip traces needs at least two layers, whereas one of them must be a GND plane. Better is the use of a 4-layer PCB, with a GND and a VCC plane and two signal layers. If the circuit is complex and signals must be routed as stripline, because of propagation delay and/or characteristic impedance, a 6-layer stackup should be used.

Table 4. Possible Board Stackup on a Four-Layer PCB

MODEL 1 MODEL 2 MODEL 3 MODEL 4
Layer 1 SIG SIG SIG GND
Layer 2 SIG GND GND SIG
Layer 3 VCC VCC SIG VCC
Layer 4 GND SIG VCC SIG
Decoupling Good Good Bad Bad
EMC Bad Bad Bad Bad
Signal Integrity Bad Bad Good Bad
Self Disturbance Satisfaction Satisfaction Satisfaction High