hi agu,
Programmed a 16F877 PIC, powered by +5V, to toggle an output pin.
Tested the following IC,s
NOTE:
all 6 inputs linked together to give a Fan in of 6, output driving an resistor/led, all OK.
It also worked OK, with a fan in of 1 gate.
7404,7414,74LS14,7404,74LS04,,7406,74LS06.
The PIC output pin voltage was switching from 0.1V to 4.9V on all the IC's. OK.
Added a 300R and Rd led to the PIC output pin [IC still connected] , switching from 0.1V to 4.2V
I would say that a PIC operating from a Vs of +5V, will drive 74xx and 74LSxx IC's satisfactorily .
Do you agree.???
If yes, please let us put another web based Myth to rest, if No, try it yourself.
Eric