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

10.2.2.1 Power

The SN65LVDS93B does not require a specific power-up sequence.

The device is permitted to power up IOVCC while VCC, VCCPLL, and VCCLVDS remain powered down and connected to GND. The input level of the SHTDN during this time does not matter as only the input stage is powered up while all other device blocks are still powered down.

The device is also permitted to power up all 3.3-V power domains while IOVCC is still powered down to GND. The device will not suffer damage. However, in this case, all the I/Os are detected as logic HIGH, regardless of their true input voltage level. Hence, connecting SHTDN to GND will still be interpreted as a logic HIGH; the LVDS output stage turns on. The power consumption in this condition is significantly higher than standby mode, but still lower than normal mode.

The user experience can be impacted by the way a system powers up and powers down an LCD screen. The following sequence is recommended:

Power-up sequence (SN65LVDS93B SHTDN input initially low):

  1. Ramp up LCD power (maybe 0.5 ms to 10 ms) but keep backlight turned off.
  2. Wait for additional 0-200 ms to ensure display noise won’t occur.
  3. Enable video source output; start sending black video data.
  4. Toggle SN65LVDS93B shutdown to SHTDN = VIH.
  5. Send >1 ms of black video data; this allows the SN65LVDS93B to be phase locked, and the display to show black data first.
  6. Start sending true image data.
  7. Enable backlight.

Power-down sequence (SN65LVDS93B SHTDN input initially high):

  1. Disable LCD backlight; wait for the minimum time specified in the LCD data sheet for the backlight to go low.
  2. Video source output data switch from active video data to black image data (all visible pixel turn black); drive this for >2 frame times.
  3. Set SN65LVDS93B input SHTDN = GND; wait for 250 ns.
  4. Disable the video output of the video source.
  5. Remove power from the LCD panel for lowest system power.