easy questions

[FOOKz™]

ok i have a bulk load of PIC16C73B chips i found somewhere.

I want to play around with these But i can not find PIC16C73 data sheets on microchip.com However i can find a data sheet for PIC16F73.

Does the C in 16C73 have a significant difference versus 16F73?

Also, (Hazer if you're reading this): how would you You control the slew rate of your output signal without using a capacitor?

[frenulem - No.5417]

Page 183 i think

[802Chives]

ok, usually a part that has an F in the middle of it stand for flash so it can be programmed over and over.

C part numbers are only programmable once or OTP.

HV stands for High voltage parts that have built in shunt regulator in the silicon so part can be operated at higher voltage.

[FOOKz™]

Thanks Chives. that will save time in the future.

Also BTW i figured out how to control the slew rate of PWM using 2 output pins and a 741, so don't worry about answering that.

[802Chives]

Also BTW i figured out how to control the slew rate of PWM using 2 output pins and a 741, so don't worry about answering that.

lol, i thought you wanted hazer to answer that. hehehehe   I am not sure how i would do that, a resistor ladder might be a quick and easy way but I/O intensive:

http://en.wikipedia.org/wiki/Resistor_ladder

im sure there are special purpose ICs out there that can achieve this as well as op amps, but PWMing your PWM would probably be the best solution if you have the speed.  I am assuming a 741 is some sort of logic chip and that is what you are doing... however if speed is not an issue it could be done in software using only one pin and no extra hardware with some handy coding.

[FOOKz™]

741 is an op amp. i just added a RC circuit on the op-amp's feedback loop and i can fully control the slew rate from nanoseconds to milliseconds.

however this method requires a capacitor