Correct footprint name for TI X2QFN

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I'm a bit confused by the fact that manufacturers use their own package designations, which don't always match those defined by IPC standards or the PCB Libraries naming convention.
In particular, the TCAL9538DTUR is identified as:
DigiKey: 16-XFQFN
TI datasheet: X2QFN (DTU0016A)
However, to me, it looks more like a conventional LGA footprint, so I'm tempted to classify it as an LGA. The problem is that when searching the library, someone looking for this component based on the designation used by DigiKey or in the Texas Instruments datasheet would most likely search for QFN.
Perhaps it would be better to use a non-standard name that explicitly incorporates the package designation given by the manufacturer in the datasheet, such as X2QFN, rather than trying to force it into a standard package category. Alternatively, we could name it LGA16CP40_4X4_160X160X40L17.

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giggio Members Profile Send Private Message Find Members Posts Add to Buddy List Active User Joined: 06 Dec 2013 Status: Offline Points: 15	Post Options Post Reply Quote giggio Report Post Thanks(0) Quote Reply Topic: Correct footprint name for TI X2QFN Posted: 8 hours 21 minutes ago at 3:06am
	I'm a bit confused by the fact that manufacturers use their own package designations, which don't always match those defined by IPC standards or the PCB Libraries naming convention. In particular, the TCAL9538DTUR is identified as: DigiKey: 16-XFQFN TI datasheet: X2QFN (DTU0016A) However, to me, it looks more like a conventional LGA footprint, so I'm tempted to classify it as an LGA. The problem is that when searching the library, someone looking for this component based on the designation used by DigiKey or in the Texas Instruments datasheet would most likely search for QFN. Perhaps it would be better to use a non-standard name that explicitly incorporates the package designation given by the manufacturer in the datasheet, such as X2QFN, rather than trying to force it into a standard package category. Alternatively, we could name it LGA16CP40_4X4_160X160X40L17.



m.elsayed Members Profile Send Private Message Find Members Posts Add to Buddy List Committee Joined: 22 Sep 2016 Status: Offline Points: 277	Post Options Post Reply Quote m.elsayed Report Post Thanks(0) Quote Reply Posted: 6 hours 47 minutes ago at 4:40am
	you can name it with "manfcature name"_case code , so you can use this footrpint for all parts found in texas supplier and have this case code "TI_DTU0016A"

Tom H Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Joined: 05 Jan 2012 Location: San Diego, CA Status: Offline Points: 6105	Post Options Post Reply Quote Tom H Report Post Thanks(0) Quote Reply Posted: 1 hour 45 minutes ago at 9:42am
	Here's a list of Manufacturers and their abbreviated name - https://www.pcblibraries.com/POD/MFR/ Footprint Names for non-standard packages: If the Case Code is associated with more than one part number - MfrName_MfrCaseCode If the Case Code is only associated with one part number - MfrName_MfrPartNumber Do not use the Case Code provided by Digikey. It does not match the mfr. datasheet. If you want to know the real Case Code, go to www.pcblibraries.com/POD Select a Manufacturer Name (do not enter a part number or case code) and select Search. A list of every Case Code will appear. A Case Code is normally located on the manufacturer datasheet page with the package dimensions. All Connector Case Codes are the same as the Part Number.
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