SN74CB3T1G125: thermal spec missing

[FAE] Andrew Wang

Genius 10685 points

Part Number: SN74CB3T1G125

Hi Team,

Customer is asking for

Component junction temperature spec. Tjmax( ℃ )?

Junction to Case Thermal ResistanceθJC (℃/W)?

Please kindly support on this, thanks!

Andrew

over 4 years ago

0 Parker Dodson over 4 years ago

TI__Guru 50732 points

Hi Andrew,

Tjmax is not spec'd on the majority of our multiplexers. If running the multiplexer within operating conditions the part will remain okay. You can calculate the max expected thermal temperature according the instructions provided in this e2e here: https://e2e.ti.com/support/switches-multiplexers-group/switches-multiplexers/f/switches-multiplexers-forum/167939/faq-how-to-calculate-max-junction-temperature-tj-max-and-max-power-dissipation-for-an-analog-switch. This link has an excel file that can be used to appx. max junction temperature by application.

With this being an older part we don't have the Case to Thermal resistance for this part. We have the ambient thermal resistance (Theta J A) which can help with junction temperature approximations.

If you have any other questions please let me know!

Best,

Parker Dodson

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SN74CB3T1G125: thermal spec missing