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SN74LVC573A: Operating Temperature and Operating free-air temperature

Part Number: SN74LVC573A

Hi Team,

According to SN74LVC573APW datasheet, my customer has a concern about the temperature.


Operating free-air temperature: –40 to 85 °C

Op Temp: -40 to 125 °C


Is it a missing or Operating free-air temperature different from Op Temp?


In addition I think it seems like post below:
e2e.ti.com/.../sn74lvc1g18-operating-temperature-and-operating-free-air-temperature

Beat Regards,
Tom Liu

  • Hi Tom,

    Is it a missing or Operating free-air temperature different from Op Temp?

    To be clear - "Op Temp (°C)" in the package option addendum table is short for "Operating Free-Air Temperature"  -- these two are referring to the same thing, which is the ambient air temperature around the device during operation.

    According to SN74LVC573APW datasheet, my customer has a concern about the temperature.

    This device is rated for operation from -40C to +125C, which was changed from -40C to 85C in May 2014. The datasheet needs to be updated to contain the correct specifications. I will put this in our errata list to fix as a priority - although it will still take at least several months to complete. I have posted the updated specifications that will be included in the new version of the datasheet below: