Using MAX13487 on a 3.3v UART?

Question

Hi, i would like to use MAX17487 with an Orange Pi 5 Plus, but the Orange Pi GPIO only supports 3.3v 
 
 my question is if the MAX17487 will output more than 3.3v on the DI, RO side > UART? 
 
 and if so, how can I solve this in a good and easy way. 
 
 the reason I want to use MAX13487 is becouse of the auto direction feature. 
 
 kind regards 
 sebastian

Sebbe · Accepted Answer

Thank you for your reply Sean, i ended up making the isolated suggestion some day ago. good to have it confirmed that it should work i found the schematics here: MAX13487E EV KIT (analog.com) one thing i thought about is the pull up/down on the rs485 A and B, why are the resistors this low value? (220Ohm, R6, R8 in the MAX13487E EV KIT link) your soloution to use Digital Isolators is a much better idea for my project than the solution i have used, i found this on your link: ADuM320N/ADuM321N (Rev.C) (analog.com) , looks like i just need two 0.1uF capacitors to get this working! then i can save alot of space. so this will be my future choice even if i dont need the isolation. Regards Sebastian)

Partner Forums

Partner Libraries

Products Mentioned

Using MAX13487 on a 3.3v UART?