Chip with large number of NC pins

Perhaps one of you chip gurus could shed some light on why Infineon would use such a large package with so many NC pins on their SLB9645. VQFN-32 with 21 NC pins and a TSSOP-28 with 17 NC.

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Just wondering if it's related to the die size or something like that

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Chisolm 
Republic of Texas
Reply to
Joe Chisolm
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Usually die size or thermal conduction, AFAIK. At the top of P.10 of the datasheet, it says that the NC pins "must not be connected externally (must be left floating)"--they're "do not connect" rather than "unconnected", so I imagine it's for test and programming in this case.

Cheers

Phil Hobbs

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Dr Philip C D Hobbs 
Principal Consultant 
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Reply to
Phil Hobbs

Or it's another, more general part, programmed for a specific purpose. Those pins do something but not needed for this application.

Reply to
krw

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