Other Parts Discussed in Thread: SN75161B
Hello support team,
Could you teach me θjc (thermal resistance between junction and case) of SN75160BDW and SN75161BDW?
Best regards,
M. Tachibana
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Tachibana,
Here is the data for SN75160BDW and SN75161BDW.
Theta JA-High K (standard datasheet value) 63.0
Theta JC, top (standard datasheet value) 31.3
Theta JB (standard datasheet value) 30.9
Psi JT (standard datasheet value) 8.6
Psi JB (standard datasheet value) 30.6
Please let me know if you have more questions.
Regards,
Hao
Hello Hao-san,
Thank you for teaching me.
By the way, the DERATING FACTOR of the DW package described in the DISSIPATION RATING TABLE in the datasheet of SN75160B and SN75161B is 9.0 mW/°C. So, I think that Theta ja is 1/(9.0 mW/°C) = 111.1 °C/W.
The Theta ja (High K) you taught is 63.0 °C/W. Is the measurement condition different?
And is Theta jc also the value measured on the High K board?
Best regards,
M. Tachibana
Tachibana,
The derating factor in the old data sheet used different method. The data I provided in accordance with the latest JEDEC standard.
Regards,
Hao
Tachibana-san,
Thanks for your proposal. I will take a look at updating the datasheet with the latest thermal data.
Hao