SN65HVD75: Use SN65HVD75 to design RS485 automatic transceiver circuit

user6342742

Prodigy 180 points

Part Number: SN65HVD75
Other Parts Discussed in Thread: THVD1450

Will there be any problems when using SN65HVD75 to design an automatic RS485 transceiver circuit?

over 3 years ago

0 Max Robertson over 3 years ago

TI__Guru 62910 points

HEllo,

Yes, SN65HVD75 could be used. Although, for newer designs I would generally recommend the newer THVD1450 device instead.

You can find an alternate auto-direction circuit here:

https://e2e.ti.com/support/interface/f/138/t/830860

The additional R/C/diode helps to maintain symmetrical rise and fall times on the differential bus even with higher cable capacitances. If you have any questions on it please let me know.

Regards,
Max

0 user6342742 over 3 years ago in reply to Max Robertson

Prodigy 180 points

What are the improvements in circuit protection of THVD1450 and SN65HVD75? THVD1450 can really replace SN65HVD75?

0 Max Robertson over 3 years ago in reply to user6342742

TI__Guru 62910 points

Hello,

THVD1450 is p2p drop-in compatible to SN65HVD75 and improves upon the VCC range supported, the common mode noise immunity, the number of nodes supported, and the ESD tolerance.

Regards,
Max

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SN65HVD75: Use SN65HVD75 to design RS485 automatic transceiver circuit