SN75LVDS83B: Layout issue

Albert Tseng

Prodigy 40 points

Part Number: SN75LVDS83B

Dear Sir/Madam,

We have a RGB to LVDS project which used TI's transmitter chip.

I would like to know whether I should keep equal length for RGB and LVDS traces.

I did not find such information on data sheet.

Thank you.

Sincerely,

Albert Tseng

over 2 years ago

+1 Josh Baik over 2 years ago

TI__Mastermind 22936 points

Hi Albert,

LVDS max. total trace length is <4000mils, but you might need to look this app note to calculate the ‘e’ (cable skew length) (High Speed Transmission with LVDS Link Devices)

Best,

Josh

+1 Albert Tseng over 2 years ago in reply to Josh Baik

Prodigy 40 points

Hi! Josh,

Thank you. But I would also like to know whether there is any requirement on RGB interface.

Sincerely,

Albert Tseng

0 Josh Baik over 2 years ago in reply to Albert Tseng

TI__Mastermind 22936 points

Hi Albert,

Data bits (RGB) length matching would be <5mils and data bits(RGB) maximum total trace length would be <4000mils. But note that this value may be smaller depending on max frequency and resultant rise/fall time. Please see the appnote above for estimate.

Best,

Josh

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SN75LVDS83B: Layout issue