Low voltage "LF" chips can be used as normal "F" designated chips ??

Dear All,

Need Help!

Iwant to know whether the chips designated "LF" (low voltages devices, Example :PIC18LF2580 ) can be used as normal "F" designated chips( Example: PIC18F2580). I know the vice-versa is not true.Whether all the ports,I2C,SPI,SERIAL n so onetc of "LF" chips function as standard "F" chip at +5V. I mean are there any restrictions or limitations. Can i replace PIC18F2580 from the circuit and use PIC18LF2580 at + 5V. I searched the datasheet but didn't find anything important regarding this.....


Thanks
Amit

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I believe an LF chip is the same as an F chip but has passed tests for
operation at low voltage. Other than allowing operation at low voltage, I
see no difference in the datasheet between an LF and an F part. I've gone
ahead and standardized on the LF part when the same chip (other than the
L) is used in different products that operate at 5V and 3.3V.

Harold

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> I believe an LF chip is the same as an F chip but has passed tests for
> operation at low voltage. Other than allowing operation at low voltage, I
> see no difference in the datasheet between an LF and an F part. I've gone
> ahead and standardized on the LF part when the same chip (other than the
> L) is used in different products that operate at 5V and 3.3V.

If you read the data sheet carefully you could conclude that the LF
chips are more limited in some aspects. A Microchip person once told me
that this is true *only *within the power supply range that is not
supported by teh standard F chips*. Within the power supply range
supported by an F chip an LF chip will behave the same.

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Wouter van Ooijen

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