SLLSE12A November   2009  – July 2014 SN75DP119

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Description (continued)
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 Handling Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Switching Characteristics
    7. 7.7 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 Pre-Emphasis and VOD Output Swing Setings
    4. 9.4 Device Functional Modes
      1. 9.4.1 Status Detect and Operating Modes Flow Diagram
  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
      3. 10.2.3 Application Curves
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Trademarks
    2. 13.2 Electrostatic Discharge Caution
    3. 13.3 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

Package Options

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

9 Detailed Description

9.1 Overview

The SN75DP119 is a 1-lane or 2-lane embedded DisplayPort (eDP) repeater that regenerates the DP high speed digital link. The device compensates for pcb related frequency loss and signal reflections. This is especially helpful in designs with long pcb traces or when there is a FET switch in the signal path.

9.2 Functional Block Diagram

dbd_llse12.gif
typ_impl_llse12.gifFigure 7. Typical Implementation Showing Two GPU Sources, a 2:1 FET Switch, and the DP119 as Signal Conditioner

9.3 Feature Description

9.3.1 Pre-Emphasis and VOD Output Swing Setings

The SN75DP119 allows configuring output pre-emphasis and output swing through the external control inputs. The following options are valid:

Table 1. Pre-Emphasis and VOD Output Swing Configuration

PRE_CTL = LOW PRE_CTL = VCC/2
(INPUT LEFT FLOATING)		 PRE_CTL = HIGH
VOD_CTL = LOW VOD = 300 mVPP;
2.5 dB pre-emphasis
(lowest power consumption)		 VOD = 300 mVPP;
6 dB pre-emphasis		 VOD = 300 mVPP;
8.5 dB pre-emphasis
VOD_CTL = VCC/2
(input left floating)		 VOD = 400 mVPP;
no pre-emphasis		 VOD = 400 mVPP;
3.5 dB pre-emphasis		 VOD = 400 mVPP;
5.5 dB pre-emphasis
VOD_CTL = HIGH VOD = 600 mVPP;
no pre-emphasis		 VOD = 600 mVPP;
2.5 dB pre-emphasis		 VOD = 800 mVPP,
no pre-emphasis

9.4 Device Functional Modes

9.4.1 Status Detect and Operating Modes Flow Diagram

The SN75DP119 switches between the power saving and the active modes in the following way:

oper_flow_cht_llse12.gifFigure 8. SN75DP119 Operational Modes Flow Chart

Table 2. Description of SN75DP119 Modes

MODE CHARACTERISTICS CONDITIONS
ShutDown Mode Least amount of power consumption (all circuitry turned off); outputs are high-impedance EN is low
2- channel Active Mode Data transfer (normal operation); The device outputs OUTx represents the data received on the input INx. The input EQ and output pre-emphasis and output swing voltage level are controlled through the external control pins. EN is high
(both main link outputs enabled)
1-channel Active Mode Data transfer (normal operation); The device output OUT0 represents the data received on the input IN0. The 2nd channel (IN1 and OUT1) are disabled. The input EQ and output pre-emphasis and output swing voltage level are controlled through the external control pins. EN is VCC/2
(only main link channel 0 enabled)