SNLS231P September   2006  – August 2024 DS90UR124-Q1 , DS90UR241-Q1

PRODUCTION DATA  

  1.   1
  2. 1Features
  3. 2Applications
  4. 3Description
  5. 4Pin Configuration and Functions
  6. 5Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Serializer Input Timing Requirements for TCLK
    7. 5.7 Serializer Switching Characteristics
    8. 5.8 Deserializer Switching Characteristics
    9. 5.9 Typical Characteristics
  7. 6Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1  Initialization and Locking Mechanism
      2. 6.3.2  Data Transfer
      3. 6.3.3  Resynchronization
      4. 6.3.4  Powerdown
      5. 6.3.5  Tri-State
      6. 6.3.6  Pre-Emphasis
      7. 6.3.7  AC-Coupling and Termination
        1. 6.3.7.1 Receiver Termination Option 1
        2. 6.3.7.2 Receiver Termination Option 2
        3. 6.3.7.3 Receiver Termination Option 3
      8. 6.3.8  Signal Quality Enhancers
      9. 6.3.9  @SPEED-BIST Test Feature
      10. 6.3.10 Backward-Compatible Mode With DS90C241 and DS90C124
    4. 6.4 Device Functional Modes
  8.   Application and Implementation
    1. 7.1 Application Information
      1. 7.1.1 Using the DS90UR241 and DS90UR124
      2. 7.1.2 Display Application
      3. 7.1.3 Typical Application Connection
    2. 7.2 Typical Applications
      1. 7.2.1 DS90UR241-Q1 Typical Application Connection
        1. 7.2.1.1 Design Requirements
        2. 7.2.1.2 Detailed Design Procedure
          1. 7.2.1.2.1 Power Considerations
          2. 7.2.1.2.2 Noise Margin
          3. 7.2.1.2.3 Transmission Media
          4. 7.2.1.2.4 46
          5. 7.2.1.2.5 Live Link Insertion
        3. 7.2.1.3 Application Curves
      2. 7.2.2 DS90UR124 Typical Application Connection
        1. 7.2.2.1 Design Requirements
        2. 7.2.2.2 Detailed Design Procedure
        3. 7.2.2.3 Application Curves
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
        1. 7.4.1.1 PCB Layout and Power System Considerations
        2. 7.4.1.2 LVDS Interconnect Guidelines
      2. 7.4.2 Layout Examples
  9. 7Device and Documentation Support
    1. 7.1 Device Support
    2. 7.2 Documentation Support
      1. 7.2.1 Related Documentation
    3. 7.3 Receiving Notification of Documentation Updates
    4. 7.4 Support Resources
    5. 7.5 Trademarks
    6. 7.6 Electrostatic Discharge Caution
    7. 7.7 Glossary
  10. 8Revision History
  11.   Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
7.2.1.2.3 Transmission Media

The Serializer and Deserializer are to be used in point-to-point configuration, through a PCB trace, or through twisted pair cable. In a point-to-point configuration, the transmission media needs be terminated at both ends of the transmitter and receiver pair. Interconnect for LVDS typically has a differential impedance of 100Ω. Use cables and connectors that have matched differential impedance to minimize impedance discontinuities. In most applications that involve cables, the transmission distance is determined on data rates involved, acceptable bit error rate and transmission medium.

The resulting signal quality at the receiving end of the transmission media can be assessed by monitoring the differential eye opening of the serial data stream. The Receiver Input Tolerance and Differential Threshold Voltage specifications define the acceptable data eye opening. A differential probe must be used to measure across the termination resistor at the DS90UR124 inputs. Figure 7-2 illustrates the eye opening and relationship to the Receiver Input Tolerance and Differential Threshold Voltage specifications.