Datasheet

SN75LVDS83A

SLLS980D –JUNE 2009–REVISED JUNE 2011

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APPLICATION INFORMATION

This section describes the power up sequence, provides information on device connectivity to various GPU and

LCD display panels, and offers a pcb routing example.

Power Up Sequence

The SN75LVDS83A does not require a specific power up sequence.

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 (SN75LVDS83A SHTDN input initially low):

1. Ramp up LCD power (maybe 0.5ms to 10ms) but keep backlight turned off.

2. Wait for additional 0-200ms to ensure display noise will not occur.

3. Enable video source output; start sending black video data.

4. Toggle LVDS83A shutdown to SHTDN = V

5. Send >1ms of black video data; this allows the LVDS83A to be phase locked, and the display to show

black data first.

6. Start sending true image data.

7. Enable backlight.

Power Down sequence (SN75LVDS83A 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 SN75LVDS83A input SHTDN = GND; wait for 250ns.

4. Disable the video output of the video source.

5. Remove power from the LCD panel for lowest system power.

Signal Connectivity

While there is no formal industry standardized specification for the input interface of LVDS LCD panels, the

industry has aligned over the years on a certain data format (bit order). Figure 14 through Figure 17 show how

each signal should be connected from the graphic source through the SN75LVDS83A input, output and LVDS

LCD panel input. Detailed notes are provided with each figure.