• State TI Thinks Resolved
  • Replies 3 replies
  • Answers 1 answer
  • Subscribers 33 subscribers
  • Views 48 views
  • Users 0 members are here
Support feedback
Options
Options
Related

Original question:

SN65HVD3082E: thermal information

SN65HVD3082E: Clarification on SN65HVD3082EDR Operating Temperature Range (85 °C vs. 105 °C)

Sourav K
Prodigy 10 points
Part Number: SN65HVD3082E

Tool/software:

Dear TI Support Team,

I am seeking clarification on the operating free-air temperature range for the SN65HVD3082EDR (RS-485 transceiver).

  • The Texas Instruments datasheet for the SN65HVD308xE family specifies that the “D” package version is characterized over a range of –40 °C to +105 °C.

  • However, several distributor listings (e.g., DigiKey, Mouser) state the operating range as –40 °C to +85 °C.

Could you please confirm:

  1. What is the official guaranteed operating temperature range for the SN65HVD3082EDR?

  2. Does the “EDR” suffix (tape-and-reel packaging) have any impact on the temperature rating compared to the standard “ED” D-package?

  3. Should we design for +85 °C (conservative) or is the device fully qualified and tested for +105 °C operation in free-air conditions?

This clarification will help us finalize our environmental specifications and ensure compliance in our design.

Thank you for your support.

  • 0
    TI__Guru 72601 points
    Sourav K said:
    What is the official guaranteed operating temperature range for the SN65HVD3082EDR?

    The datasheet is the device's warranty. Datasheet recommended TA max operating temperature for the D package is 105C or in other words, keep Tj below 130C. 

    Sourav K said:
    Does the “EDR” suffix (tape-and-reel packaging) have any impact on the temperature rating compared to the standard “ED” D-package?

    R means it comes in a reel. The device itself is the exact same whether it ends in R or not. So it does not impact temp.

    Sourav K said:
    Should we design for +85 °C (conservative) or is the device fully qualified and tested for +105 °C operation in free-air conditions?

    It's based off the of the Tj max which is 130C. So as long as the junction temperature doesn't exceed 130C the device will operate within the electrical parameters we state.

    So you basically need to ensure the power dissipated across the device doesn't exceed ~200mW if TA is 105C. 

    Since the device's data rate is pretty slow. The device itself probably won't see that much power dissipation across it. You would probably need a sustained short across the differential output pins to get close to that power dissipation level.

    -Bobby

  • 0 in reply to BOBBY
    Prodigy 10 points

    While reviewing the datasheet, I noticed that on page 27 (Package Information section), the operating temperature is listed as –40 °C to +85 °C for the D package.

    This seems to contradict the main datasheet electrical characteristics section, which specifies the D package is characterized from –40 °C to +105 °C.

    Could you please confirm.

  • 0 in reply to Sourav K
    TI__Guru 72601 points

    Please use the main electrical characteristic section of the datasheet. 

    -Bobby