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LF parts at higher speeds
I routinely use 18LF4620 parts at 5 volts and get full crystal speeds up to 10 MHz with the internal PLL giving 40 MHz operation. No troubles. I have always regarded the LF tables in the datasheets as showing the MINIMUM voltage limits whereas the MAXIMUM voltages remain the same as the regular 16Fxx or 18Fxxx parts.
HTH
BrianT
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I'm comparing two versions of PIC16F1827 and 16LF1827.
I can't really find "big" differences but some VDD & VDR levels.
Why would anyone buy a LF model if it is not only for the gain of 0,2V for minimum RAM retention voltage?
Roger
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Because some LF versions will work at significantly lower operating voltages.Why would anyone buy a LF model if it is not only for the gain of 0,2V for minimum RAM retention voltage?
Consider something like a PIC18LF2431 which will work at 2V with up to a 4MHz
oscillator. The non LF version requires 4.2V minimum for any oscillator speed.
Last edited by Bruce; - 4th January 2010 at 20:05.
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