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ISO7741: Qualification Summary - Question Regarding Temperature Cycling

Darren (FAE)
Expert 5483 points
Part Number: ISO7741


I have a customer asking for some qualification information; we have been using the qualification summary page on ti.com, but there are some points I need to confirm.

The Temperature Cycle lists the following.

Is my understanding correct?

- -65C/150C is criteria "C" in the JESD22-A104 standard, which means typically 2 cycles per hour. Was this device qualified with 2 cycles per hour? (roughly 30 mins per cycle)

- What test chamber was used? Or, what medium was used? (I assume some gaseous medium, not liquid - specifics not needed)

The Thermal Shock test falls under JESD22-A106B, and has a much faster temperature ramp. To achieve this, liquid chambers are often used. This device has not been qualified for "Thermal Shock" (JESD22-A106B), it has only been qualified for "Temperature Cycling" (JESD22-A104) - yes?

Regards,
Darren

  • 0
    TI__Guru 55825 points

    Hi Darren,

    Thanks for reaching out, please find below my inputs.

    Darren (FAE) said:
    - -65C/150C is criteria "C" in the JESD22-A104 standard, which means typically 2 cycles per hour. Was this device qualified with 2 cycles per hour? (roughly 30 mins per cycle)

    Yes, that is correct. -65C/150C refers to "Test Condition C" in JESD22-A104B and it does require the frequency to be 2 cycles per hour (cph).

    Darren (FAE) said:
    - What test chamber was used? Or, what medium was used? (I assume some gaseous medium, not liquid - specifics not needed)

    The medium used is air.

    Darren (FAE) said:
    The Thermal Shock test falls under JESD22-A106B, and has a much faster temperature ramp. To achieve this, liquid chambers are often used. This device has not been qualified for "Thermal Shock" (JESD22-A106B), it has only been qualified for "Temperature Cycling" (JESD22-A104) - yes?

    Your understanding is correct, the device has not been qualified for "Thermal Shock" (JESD22-A106B).

    Regards,
    Koteshwar Rao