SN65DPHY440SS: MIPI Redriver

Patty

What is the input, output, and data rate requirement? The DPHY440 is a MIPI retimer that can support data rate up to 1.5G.

Thanks

David

Hi David,

check below:

Display Frame Rate : 90 Hz

Support VESA DSC 1/3 compression 

MIPI input bandwidth : < 460 Mbps

MIPI output bandwidth : < 460 Mbps

Thanks!

Patty

Hi David,

so DPHY440 can also support DSC right? Thanks!

Patty

Patty

The DPHY440 does not care about the DSC compression.

Thanks

David

Hi David,

customer raised questions. Would you please help for comment?

1. Power Consumption : Is it possible to share the power data based on 500 Mbps with 4 lanes? Based on the datasheet, it might impact our battery design if it consumpt 150 mW.

 2. Do you have any recommendation (experience) the maximum MIPI length from SNx5DPHY440SS to Rx (Display IC) based on routing on PCB board?

 3. I assume your suggest use the SN75DPHY440SS because it is suitable for commercial product. However, the IBIS model seems all the same, please correct me if I am wrong. Otherwise, I will use SN65DPHY440SS to simulate the MIPI eye diagram.

BR,

SHH

SHH, Patty

Quick question, what is the actual data rate, is it the total data rate or the data rate per lane? How many MIPI lanes do you plan to use and what is your minimum high speed clock frequency?

Thanks

David

Hi David,

It is the clock rate, meaning 500 Mbps per lane.

BR,

SHH

SHH

1. Power Consumption : Is it possible to share the power data based on 500 Mbps with 4 lanes? Based on the datasheet, it might impact our battery design if it consumpt 150 mW.

Unfortunately, I do not have the power number at 500Mbps. 

 2. Do you have any recommendation (experience) the maximum MIPI length from SNx5DPHY440SS to Rx (Display IC) based on routing on PCB board?

My recommendation is to place the DPHY440 as close to the RX as possible.  The DPHY440 provides higher level of EQ than the TX pre-emphasis, and more selection levels. The second benefit of putting this device closer to the RX side is that DPHY440 is a re-timer, which can compensate any lane-to-lane timing skew, as long as the input skew is within DPHY440’s spec.

 3. I assume your suggest use the SN75DPHY440SS because it is suitable for commercial product. However, the IBIS model seems all the same, please correct me if I am wrong. Otherwise, I will use SN65DPHY440SS to simulate the MIPI eye diagram.

The SN65 and SN75 is functionally the same, the only difference between the two is the temperature range.

Thanks

David

Hi David,

In terms of 500 Mbps power consumption, would you discuss internally to simulate or measure the data for important customer reference? 

BR,

SHH

SHH

Please use the 150mW as the power consumption number for the 500Mbps data rate.

Thanks

David

Hi David,

Thanks for feedback. would you please help for further question here?

Do you mind if  I loop you in this important customer's mail?

If the power consumption is totally the same between 500 Mbps & 1Gbps. Could you elaborate it? 

BR,

SHH