SN75DPHY440SS: How to choose the Dphy IC？

Hi,

DPHY440 will be a possible solution, do you know the loss of the 2m transmission line at 500MHz?

Thanks

David

HI，David

  I wonder if insertion loss is the only limitation of long-distance transmission, and do I think using rediver will solve this problem?

Is there a requirement for transmission distance in the MIPI specification?

THS！

Hi,

The DPHY440 supports up to 5dB at 750MHz and 2.5dB DE on its TX. These features were intended to some extent to compensate the ISI loss in the channel. It’s hard to tell a max transmission distance, with different transmission materials may have different results, also the clock rate, source signal swing, DE level of source signal, EQ capability of end point receiver will take an effect. 

As a repeater, DPHY400 is also intended to eliminate the timing skew due to channel differences. As long as the input timing within DPHY440’s spec requirement, it is able to re-align clock and data to improve the system’s timing margin.

For the requirement of transmission distance, please see section 8.6 Interconnect Specifications of the MIPI D-PHY spec. 

Thanks

David