i am working with a half duplex RS-485 Transceiver ic SP3485EN with 10Mbps Data Rate datasheet :https://www.maxlinear.com/ds/sp3485.pdf i actually want the maximum working voltage (Viom) of design purpose, but only esd rating and supply voltage is mentioned in the data sheet is there a that i can find the maximum working voltage

  • \$\begingroup\$ What maximum working voltage you mean? There is no Viom in the datasheet? \$\endgroup\$
    – Justme
    Aug 16, 2020 at 18:13
  • \$\begingroup\$ i basically can't figure out the withstand voltage of the transceiver \$\endgroup\$ Aug 16, 2020 at 18:26
  • \$\begingroup\$ Yes, but what do you mean by withstand voltage? Of what? Input voltage? Supply voltage? Output voltage? Compared to ground? \$\endgroup\$
    – Justme
    Aug 16, 2020 at 18:47
  • \$\begingroup\$ The voltage is 2.5V differential. \$\endgroup\$ Aug 16, 2020 at 18:56

1 Answer 1


The bullet item under FEATURES says:

-7V to +12V common-mode input voltage range

This range of voltages is mentioned many times in the tables describing the driver and receiver DC characteristics.

In other words, the receiver will work correctly (and the driver will not be overloaded) as long as both signal lines fall within this range, and the differential voltage between them is at least ±0.2 V.

  • \$\begingroup\$ It can withstand +/- 15V, but that is the absolute maximum rating. The range where it still operates normally is as mentioned above. \$\endgroup\$
    – Justme
    Aug 16, 2020 at 19:34

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