Require LVDS line receiver with fail-safe output high when one of the inputs are open (just one of the cable conductors open)

Hello Arun,

Thanks for reaching out.

Take a look at the SN65LVDS9637. This device has an internal open-circuit fail safe and a max pulse skew of 400 ps, with a typical skew of 0 ps.

Most LVDS receivers don't come with an integrated fail-safe circuit, and usually an external biasing circuit is needed. With this in mind, another device to consider is the SN65LVDS4, pulse skew of 240 ps (max) but no fail-safe. If your application allows it, then refer to this app note (Failsafe Biasing of LVDS Interfaces) for external biasing.

Regards,

Josh

Hello Josh,

SN65LVDS9637, the fail-safe circuit works when both inputs are open but not when either of the inputs is open alone (just the one conductor of the cable connecting to it is open). Please suggest a LVDS line received that has in-build fail-safe circuit that will make the output go high when one of the inputs are open, when both the inputs are open, when both the inputs are shorted together, when one of the input is shorted to the shield, when one of the inputs is shorted to the VCC. 

Thank you,

Arun

Arun,

The LVDS receivers that have integrated fail-safe circuits only support open-circuit conditions. If open, floating, and short fail-safe conditions are needed then this needs to be done externally. Please refer to the app note on my initial response for additional information.

Regards,

Josh

Hi Josh,

Yes, I am talking about open circuit by making the one of the inputs open. The fail-safe circuit of SN65LVDS9637 does work when both inputs are open-circuit and I want same functionality when just the one input is open circuit.

Thank you,

Arun

Hi Joshua,

As per the customer:

"SN65LVDS9637, the fail-safe circuit works when both inputs are open but not when either of the inputs (single input either in+ or In-) is open at a time (just the one conductor of the cable connecting to it is open). Please suggest a LVDS line receiver that has in-built fail-safe circuit that will make the output go high when one of the inputs is open, when both the inputs are open, when both the inputs are shorted together, when one of the input is shorted to the shield, when one of the inputs is shorted to the VCC."

Let me know if you need more information.

Regards,

Marvin

Hello Marvin, Arun,

Our LVDS receivers that have integrated fail-safe circuits will only detect open-circuit conditions (when both inputs are open). We don't have devices that will detect all faulty conditions: Open, Floating, and Shorts

Regards,

Josh