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Datasheets give conflicting specifications about temperature range

Thread Summary

The user inquired about the temperature range for the ADSP-21489BSWZ-4B DSP, noting conflicting information between a 2012 and a 2024 datasheet. The final answer clarifies that the 2024 datasheet specifies the junction temperature range (-40 to +125°C), while the 2012 datasheet refers to the ambient temperature range (-40 to +85°C). The ADSP-21489BSWZ-4B processor operates within the -40 to +125°C junction temperature range, confirming its automotive-grade capability.
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Category: Datasheet/Specs
Product Number: ADSP-21489BSWZ-4B, ADSP-21489

Hello 

I was looking for ADSP-21489BSWZ-4B DSP for one of my projects but I encounter conflicting information in datasheets of products. In the datasheet dated 2012 this product is listed as -40 to +85 degrees celcius, however in the datasheet dated 2024 it is written as -40 to +125 degrees celcius. Which data is true for this product code?

Datasheet dated 2012 Rev A


Datasheet dated 2014 Rev I

The suppliers page also gives conflicting data (i.e. Digikey) so I want to make sure that whether all the processors with this product code is actually -40 to +125 degrees celcius (i.e. automotive grade)

  • Hi,

    Both are correct. In the latest datasheet “Temperature Range” column means the junction temperature. Please refer the below screenshot:

    In the old revision, “Temperature Range” column means the ambient temperature.

    Junction temperature (TJ) is the temperature specification. so, the processor “ADSP-21489BSWZ-4B” comes with the -40 to +125°C temperature range.

    Regards,
    Nandini C