PNR suffix for Texas Instruments MSP430F6721IPNR

Semiconductor Integrated Circuits (ICs)
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80LQFP

What do the PN and R suffixes call out in Texas Instruments part number MSP430F6721IPNR?

These suffixes call out the case size and packaging.

PN = 80 pin LQFP (12mm X 12mm) package size.
R = Tape and Reel packaging (Large Reel)

Click here for the Datasheet.