THVD1419: Failsafe resistors

Kazuki Itoh

Part Number: THVD1419
Other Parts Discussed in Thread: THVD1410,

Hello team,

I have a question about THVD1419 and THVD1410.

They have full failsafe functionality at RX side.

So external failsafe resistors (PU, PD) are not required, correct?

Regards,

Itoh

0 Clemens Ladisch over 3 years ago

Guru 243220 points

The receiver's switching threshold is between -100 mV and -130 mV (typically), so that a differential input voltage of 0 V is read as high.

External failsafe resistors are needed if you want a noise margin larger than 100 mV (20 mV in the worst case).

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