>>Ok, you may have a sync problem there. You may want to send a few nulls. to the serial to sync up the communication.

I'm not sure what you mean here. The serial line is:

serout2 gpio.0,16780,["TEMP=",s2,dec3 temp/10,".",dec1 temp//10,223,"C "]

This is tied to a backpack LCD so I can see what is happening. When the MCLR is tied to the rail it works flawless. Remove the resistor and get mixed results. Sometimes it stops, sometimes I get garbage characters in the serial output. I think I'll stick with using the resistor since it works perfect with it.

>>is your chip being turned on from 5 volts on another pin??? That 675 can run without the VCC connected up, and another pin connected to 5 volts.

Nope, I have pin 8 going to ground and pin 1 going to the +5V rail.

I'm now going to try using the internal resistors with this DS1820 and see what happens. Hopefully it will work properly. I'll post my results.