MAX3291
Production
The MAX3291/MAX3292 high-speed RS-485/RS-422 transceivers feature driver preemphasis circuitry, which extends the distance and increases the data rate...
Datasheet
MAX3291 on Analog.com
LTC2862
Production
The LTC2862/LTC2863/LTC2864/LTC2865 are low power, 20Mbps or 250kbps RS485/RS422 transceivers operating on 3V to 5.5V supplies that feature ±60V overvoltage...
Datasheet
LTC2862 on Analog.com
Hi,
Do you have an LTspice model that can simulate the RS-485 preemphasis function?
I'm considering MAX3291 and MAX22502, but I heard that there is no LTspice model.
Best regards,
Yuya
Hi Yuya ,
I know that this had been too late overdue.
I've done quick research on our queue on MAX3291 and MAX22502 but to no avail, both of the parts still do not have any request such that the model for these parts would be created, which is the request is to be done by the Application Engineer.
In the other hand, I've made some research on our library that would probably help you in your concern, in which I found the part LTC2862 which is similar to the parts you mentioned. This part has an existing model on our updated LTspice Library (see image below), and I also included here the site that will redirect you to the details of the part. 
LTC2862 Datasheet and Product Info | Analog Devices
...
I hope this helps.
Best Regards,
Earl
