DS92LV3221: Need support DS92LV3221 / DS92LV3222 device

Hi Thang,

Happy to provide support on this matter. For me to provide you with the most appropriate replacement devices, I will need a little more information regarding the system architecture. Can you please provide me with some additional context regarding the system requirements (i.e. PCLK requirements, incoming video datatypes, expected datatypes at display, etc.)?

Best,

Nikolas

Hi Nikolas, 

I am using DS92LV3221 / DS92LV3241 as  a Transmitter to sent 22 logic signals to Reciever (DS92LV3222 / DS92LV3242), at clock 20Mhz. and LVDS Dual lane mode

22 Logic signals are not video signal, just low speed control signal (<5Mhz). But I need to transmit the signal over a 10-20m  cable

Hi Thang,

Most later generation parts are designed with displays in mind, but it should still be feasible to send control signals regardless. The < 5MHz requirement does reduce the number of available options, as most FPD-Link components are not meant for operation below a 5MHz input. However, if this is not a fixed requirement and the signals can be > 5MHz, let me know and additional options can be provided.

With the < 5MHz requirement in mind, an option would be a DS90C387A / DS90CF388A pair (datasheet link for both). Based on the datasheet, would this be sufficient for your needs?

Best,

Nikolas

Hi Nikolas, 

DS90C387A / DS90CF388A pair donot meet requirement because it need more LVDS pair

Kindily to see my System schematic, I have limit LVDS cable wires, only 2 pair for Dual lane LVDS mode). I sold a lot of system (both controller and device). If I switch to the new LVDS chip, I expect it to be compatible with the old interface standard on my devices.

As I know Chanel link II is upgrared from Chanel link I, hase reduce CLK pair. Channel Link III is provide Bir-direction sinal, Are Channel Link III devices compatible with Channel Link II?

Thanks

Hi Thang,

Before we move forward, I would like to first establish some clarity regarding your clock requirement. Above, you mentioned that you are sending low speed control signals (<5MHz) with your current configuration. However, the DS92LV3221 / DS92LV3222 are not meant for operation below 20MHz. Can you please clarify on your clock requirement? If there is no fixed < 5MHz requirement, then this will open up the possible replacement devices a little more. 

Best,

Nikolas

hi Nicolas, 

DS92LV3221 is operated at 20 -50Mhz clock, Correctly, I provide 20Mhz for IC internal module working.

My control signals are vari at data bus, some signal is clock 5Mhz, another is fixed value. 

Hi Thang,

Thank you for that clarification. In that case, an appropriate solution here would either be a DS90UB925-DS90UB926 pair. These devices support a clock signal anywhere between 5MHz to 85MHz and also feature a bidirectional control channel. 

See below for links to their data sheets:

• 925: https://www.ti.com/lit/ds/symlink/ds90ub925q-q1.pdf?ts=1726004428716&ref_url=https%253A%252F%252Fwww.google.com%252F
• 926: https://www.ti.com/lit/ds/symlink/ds90ub926q-q1.pdf?ts=1726004440441&ref_url=https%253A%252F%252Fwww.google.com%252F

Best,

Nikolas

Hi Nicolas, 

Thank for your support.

Howerver, If I design new system I can choose DS90UB925-DS90UB926 pair or any device. In my situation, my product are using DS92LV3221/DS92LV3222, and DS92LV3241/DS92LV3242, both of them are compatiable each other. DS90UB925-DS90UB926 pair are FPD-Link III, Does it compatiable DS92LV3221/DS92LV3222 and DS92LV3241/DS92LV3242. I mean Can I use DS92LV3221 with  DS90UB926 or DS90UB925 with DS92LV3222. It can helful to my product in the market can support new design without any converter device

Hi Thang,

The DS92LV3221 and DS92LV3222 are not compatible with the DS90UB926 or DS90UB925, respectively, because the protocol has changed between Channel Link and FPD-Link. Generally speaking, since both the DS92LV3221 and DS92LV3222 are being obsoleted, it is strongly encouraged to migrate to the newer FPD-Link devices for the longevity of the system.

Best,

Nikolas

Hi nikolas, 

Thank for your support. Does Channel Link III can compatible with Channel Link II?

Hi Thang,

I will need to look into Channel Link III - Channel Link II compatibility further. What I can tell you as of right now is that Channel Link II devices are not compatible with Channel Link I devices. 

Hi Nicolas, Are you check compatibility Link III and II?

Hi Thang,

Yes, I am still looking into this further internally.

Best,

Nikolas