Hi Kaji,
thanks for reaching and this interesting question.
The external pull-up and pull-down actually do the same job as the internal fail-safe function so its not affecting this in a negative way.
Kaji@PAN said: It is probably because the impedance…
Hi Zhou,
thanks for sharing the schematic! And yes there is plenty of material offered by TI about RS485 and I do understand it can be overwhelming sometimes.
The device that your customer is using has a 1/8 Unit Load and can support up to 256 nodes…
Hi Daniel,
thanks for reaching out, this is a good question. To determine if a passive fail safe resistor network is needed, a look at the differential Input threshold voltage of the receiver tells you if you need a external biasing.
So lets take…
This spreadsheet tool makes it easy to look up what the recommended pin to pin capable RS-485 transceivers to replace old TI RS-485 transceivers.
/cfs-file/__key/communityserver-discussions-components-files/138/1777.Recommended-New-RS_2D00_485-parts…
