OK, now they look that they are takeing heat again. But this is a very subjective measurement, since I´m just using my fingertip-thermometer
Anyway, I´ve noticed that me and tjbaudio are wiring the DE and RE pins directly to VCC. No resistor, no disengaging of it ever. Well, I just disconected this, and the communication keeps working! Being this no solution, I kept this connected, just in case.
But, I measured the current drain of the 3 MAX485 together and it totals...160mA!!!
So I´m in the same current range as tjbaudio. Is that normal? I wasn´t able to find, or understand, any tipical curent draw while transmitting in the datasheet.
I did try to lower de transfer rate by increasing the pause between bits sent and nothing changed.
Now i found that part in the datasheet:
Continuous Power Dissipation (TA = +70°C)
8-Pin Plastic DIP (derate 9.09mW/°C above +70°C) ....727mW
Does this mean that this IC can dissipate up to 727mW. In that case, I dont have to worry and just let them be hot