Go Down

Topic: Usage of the MAX488 as a MAX485 (Read 2688 times) previous topic - next topic



I ordered the MAX488 to comunicate through RS-485 using Modbus RTU protocol.

Now i have noticed that the MAX488 is full duplex chip ( http://datasheets.maxim-ic.com/en/ds/MAX1487-MAX491.pdf ) which makes me use 4 lines of comunication and separate the Data IN and Data OUT chanels.

Is it possible to use the MAX488 like a MAX485? Using only 1 diferential channel and copying the connections like they are made for the MAX485 in the datasheet?

Does anyone know?

Best regards


I think not because you do not have a ~RE pin on the MAX488 that means you can't control which way the simplex communications is operating in.
A lot depends on the actual application you are trying to do.


With the 488 I think you are out of luck, for half-duplex you need to disable the transmitter and that's not possible with the 488.

Rob Gray aka the GRAYnomad www.robgray.com

Go Up

Please enter a valid email to subscribe

Confirm your email address

We need to confirm your email address.
To complete the subscription, please click the link in the email we just sent you.

Thank you for subscribing!

via Egeo 16
Torino, 10131