@ Brett - Thank you for reply
I want to design a serial Multi-drop BUS up to 20 Mbps speed.
I’m planning to use MAX3107 in SPI mode and connecting it to a STM32F779 MCU for generating and using the data and also Implementing the serial BUS based on 50 Mbps Full-Duplex RS485 transceivers.
so I happily appreciated to your thoughts about it!