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TLC2252: Operating temperature of TLC2252 and TLC2254: Data sheet inconsistency

Eric Auer
Prodigy 40 points
Part Number: TLC2252
Other Parts Discussed in Thread: TLC2254

Tool/software:

Hi, I have a question understanding the package option and orderable part number table in the TLC2252.pdf for TLC2252 and TLC2254:

I would assume that all TLC225xAIDR, just like TLC225xIDR, are -40 to +125°C, but the table lists:

  • TLC2254ID and TLC2254IDR as "-", TLC2254ID.Z and TLC2254IDR.Z as 0 to 70°C and TLC2254IDG4 as see TLC2254ID.
  • TLC2254AID and TLC2254AIDR as "-" and TLC2254AID.Z and TLC2254AIDG4 as see TLC2254AID and TLC2254AIDR.Z and TLC2254AIDRG4 as see TLC2254AIDR.
  • there can be other cases of unexpected temperature ranges, in particular for TLC2252, but those mentioned above caught my attention first.

While this can be a simple data sheet mistake, I also noticed even Mouser sells TLC2254IDR and TLC2254ID as 0 to 70°C, but TLC2254AIDR as -40 to +125°C and TLC2254CDR as 0 to 70°C as expected.

DigiKey, on the other hand, sells TLC2254CDR as 0 to 70°C and TLC2254AID, TLC2254AIDR and TLC2254IDR all as -40 to +125°C, which seems more consistent.

I would expect CD to always be 0 to 70°C and AID and ID to always be -40 to +125°C, based on the table on page 2 of the data sheet?

So I would guess that DigiKey is right and Mouser and the table later in the data sheet are not?

PS: The table on page 2 of the data sheet is not explicit about that, but QD seems to be the automotive version of ID. Same temperature ranges, same VIO max.

  • 0
    TI__Guru* 77331 points

    Hi Eric, 

    Eric Auer said:
    I would expect CD to always be 0 to 70°C and AID and ID to always be -40 to +125°C, based on the table on page 2 of the data sheet?

    The understanding is correct. These IC should use the same Si-die design and specification differences are reflected in IC's grade, where TLC225xA is better grade than TLC225xC and TLC225xI grade. In terms of temperature operating ranges, the CD grade is likely operating outside of the 0-70C, may be even -40C to 125C, but the performance specifications are only limited and guaranteed to figures specified within 0-70C range. 

    Eric Auer said:
    So I would guess that DigiKey is right and Mouser and the table later in the data sheet are not?

    The product has gone through FAB change recently, and the datasheet may not have updated to the latest change, though most of the previous performance specification should be similar or within the previous datasheet's min. and max. limits.  

    https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/4805/PCN20230130003.1.pdf

    Eric Auer said:
    but QD seems to be the automotive version of ID. Same temperature ranges, same VIO max.

    TLC225x-Q1 is the automotive part and it is guaranteed to operate between -40C to +125C (a part of AEC-Q100 certification). Yes, the automotive version has different datasheet from the non-automotive ones. 

    If you have other questions, please let me know. 

    Best,

    Raymond

  • 0 in reply to Raymond Zhang1
    Prodigy 40 points

    Thank you for your explanations. So I and C are similar, but with different temperature ranges, while AI is a better grade. Also, C might get close to I temperature range, it just does not promise it. The table on page 2 is right, but the orderable part number table is not always right and Mouser is not always right, either. Good to know. Best, Eric