Hi All,
Is fail safe circuitry at the LVDS receiver a must? If needed, how do I design a fail-safe in a multi-drop LVDS receive topology?
Your inputs are much appreciated.
Thanks,
D
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Hi All,
Is fail safe circuitry at the LVDS receiver a must? If needed, how do I design a fail-safe in a multi-drop LVDS receive topology?
Your inputs are much appreciated.
Thanks,
D
Hi Darshan,
Failsafe circuitry is not a must and is rather a system level requirement.
If you do use failsafe biasing you would place the network only at one end of the bus pulling the bus to the failsafe level. The other end of the bus would be terminated regularly. Here is an app note on failsafe biasing RS-485 networks that will provide you some insight as the same design rules would apply with different voltage levels:
www.ti.com/.../snla031.pdf
Instead of implementing failsafe biasing externally though you could use type 2 MLVDS device (receiver) like the SN65MLVD3 that has failsafe biasing implemented internally. We have a bunch of different topologies of type 1 and type 2 devices so spend some time looking through the portfolio looking for the part that best meets your design needs.
Please let me know if you have anymore questions?