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Clarification on Logic compatibility of ADV7611 (urgent)

Question asked by padmanathanj on Nov 9, 2012
Latest reply on Jul 10, 2013 by joe.triggs

Hi All,

 

          The Video output bus in ADV7611W is to be configured in 8-bit SDR YCbCr 4:2:2 mode and connected to an 8-bit Video input port of a Processor.

 

Since the Vih(min) of the Processor  (3.3x0.8 = 2.66V) is greater than the Voh(min) of the ADV7611 (2.4V), we need to confirm if this connectivity is ok. For what Output High Current Ioh, the Voh(min) of 2.4V is defined.

In this case, is there any simple method to to have a compatible connection (without adding any external active devices) to meet the noise margin.

The Output Video Signal Clk (from ADV7611) can go up-to a maximum speed of 75MHz in the design.

 

Also, we are using a MUX (SN74CBTLV16292 from TI) in between the ADV7611 and Processor (in the Video bus). However, this Mux offers only a Series FET switch (when enabled) and does not modify the Output logic levels of the ADV7611.

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