Tool/software:
L3H is attempting to gain approval from its Space Customer for a TI M430FR5739SRHATEP Mixed-Signal Microcontroller.
M430FR5739SRHATEP Mixed-Signal Microcontroller
Our customer requirement is for these parts to pass Level 2 Screening and Qualification per EEE-INST-002, Section M4, as it relates to PEM devices. The actual Screening and Qualification tests and conditions are specified in PEM-INST-001 (PEM Specific).
There is great uncertainty around the max temp for the part listed in the datasheet and the temperatures that are run for HTOL and Temperature Cycling and others per TI’s Quality Summary and TI's Reliability Testing Reports available at their website.
- TI's Data sheet for the part specifies an operating temperature range of -55 to +85C.
- TI's Quality Summary Report for this part (M430FR5739SRHATEP-15353148_Quality Summary) shows that HTOL is run at 125C and Temperature Cycling at 150C.
- Tjmax according to the datasheet is +95C
The confusion is between the Max Op temp of the part which is +85C with a Tjmax = +95C and the Quality Summary Test for HTOL which is run at 125C. The HTOL test temperature, as specified in PEM-INST-001, should be as such as to not exceed the maximum junction temperature of the part 95C (according to the datasheet)
How is the HTOL test justified to be run at 125C if the Tjmax for the part is 95C according to the datasheet.
Please confirm what the actual Max Junct temp (Tjmax) is for this part.
At the following TI semiconductor qualification link Qualification summary FAQs | Quality, reliability, and packaging FAQs | Quality & reliability | TI.com
it states that TI does their Qualification for Semiconductor Products using a 105C junction temperature. This temp is 10C above the 95C that is specified in the TI product datasheet for the part we are attempting to get customer approval.
My initial email exchange with TI technical support resulted in an affirmation that the maximum junction temp is 95C, per the datasheet. But as you can see the confusion L3H and its customer are facing; namely that the datasheet's claim of Tjmax = 95C is in contradiction to the Tjmax=105C specified for their Qualification testing of Semiconductor products.
I was asked to have this Support Ticket created to TI's Quality and Reliability Team so it is my hope that my questions can be answered in a timely manner as L3H is approaching critical end dates in their Program schedule.
To reiterate:
Is the max junct temp 105C or 95C?
What is TI's justification to run the HTOL test at 125C (per TI Quality Summary Report) when the max junct temp is lower in either the 95C case or the 105C case?
Thank You,
Jack
