jwhill2000
New Member
..was wondering, I have worked with the PIC16F84 w/10MHz clock some and just tried out the 16F84A w/20MHz clock. I noticed that the 16F84A was really putting off some heat, almost too hot to touch. Is this normal? Thank.
Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
jwhill2000;342581 Is this normal? [/quote said:No. You do realize the power connections are amidship on the '84?
Thanks for replies. Yes, it appears to me that the power connections between the two are identical - from the datasheets. My circuit is just a simple serial output to a terminal. I didn't change anything when I went from 84 to 84A, other than removing the 10MHz osc w/a 20MHz osc. The program worked fine, but the chip was hot.
If a PIC is getting too hot to touch, it's almost certainly been plugged in the wrong way round - PIC's generally run stone cold, although they may get slightly warm if they are supplying a lot of current.
Possible Nigel. I was of the opinion that if a 16f84A-4 is worked with 20MHz oscillator, it might turn HOT.
It is a permitted design feature of the chip. Hence nothing should happen.I run the 18F1320 at 40Mhz (10Mhz and 4x PLL) regularly and they get slightly warm but never hot.
I am in the process of reworking my breadboard and making it a bit neater. I'll let you know what I did or did not do wrong. Thanks.