Author Topic: Help with Microchip Datasheet  (Read 1103 times)

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Offline Luchik

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Help with Microchip Datasheet
« on: August 30, 2016, 09:53:34 am »
I am trying to understand the VSS and VDD pins connection in this Microchip datasheet:
http://ww1.microchip.com/downloads/en/DeviceDoc/40001825A.pdf

I am using 44-QFN Package, so i found the pin allocation map for this package on Page 7:

according to this picture, VDD are pins: 7,8,29,28; and VSS are: 6, 30, 31.

I also found this pin allocation table on page 13:


Pins 7 and 29 are not shown in this table! can I trust the allocation map to be true with both pins (7,29) being VDD?
 

Offline amyk

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Re: Help with Microchip Datasheet
« Reply #1 on: August 30, 2016, 10:31:11 am »
That's a preliminary datasheet... some errors are to be expected. But the fact that two packages with the same number of pins have a mostly the same but slightly different pinout is a big :wtf:

I'd choose a more mature product unless you have a compelling reason to use it. This one is far too new.
 

Offline EEVblog

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Re: Help with Microchip Datasheet
« Reply #2 on: August 30, 2016, 10:35:30 am »
I'd trust the pinout diagram over the table.
As mentioned, yeas, a preliminary datasheet, bound to be some copy'n'paste errors. Report it.
 
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Offline stj

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Re: Help with Microchip Datasheet
« Reply #3 on: August 30, 2016, 11:11:40 am »
trust neither,
email microchip and point out the error - get them to clarify it.
 

Offline Kjelt

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Re: Help with Microchip Datasheet
« Reply #4 on: August 30, 2016, 12:08:19 pm »
Mistake has been in their datasheet since 2014:
http://www.mouser.com/pdfdocs/40001768A.pdf
 

Offline Kjelt

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Re: Help with Microchip Datasheet
« Reply #5 on: August 30, 2016, 12:10:54 pm »
If you have the chip measure the ohms resistance between the Vdd pins and the Vss pins , they should be close to zero ohms, that would give some confidence.
 


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