At 10:58 PM 30/05/01 -0400, you wrote:
>At 07:33 PM 5/30/01 -0700, you wrote:
>>Hi, I've checked in the archives, but couldn't find any information about
>>this: I am putting an order together on digikey.com, and when I went to get
>>several PIC16F627 in the DIP packaging, they have a 18 pin and a 20 pin
>>version of the same micro.
>
>Get yourself a datasheet! http://www.microchip.com    The package options
>and dimensions are shown.
>
>>Am I correct in my understanding that the only differences here are an extra
>>set of power and ground pins? Does anyone know if the packaging for the
>>20pin is any wider (or just longer?) that the 18 pin one?
>
>The 20-pin package is an SSOP, the 18 pin might be SO or DIP, depending on
the
>part number. Don't depend on digikey (or any other distributor) to keep this
>straight for you.


Yes, the above is true but it does not mean that all 20-pin pics are
surface mount. There are a few 20-pin DIP parts - the 16C77x family.
These are the ones with a 12-bit A/D and the extra pins are the Analog power
rails exactly as you speculated.

Regards,

Jim





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NEWFOUND ELECTRONICS
mailto:newfound@pipeline.com.au
http://www.new-elect.com
MPLAB compatible PIC programmers.

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