[PC-1557] - Portenta H7 MTBF information (datasheet) (#1746)

* Content update (MTBF table initial commit)

* Content update (MTBF information update)

* Content update (MTBF table information)

* Content update (MTBF information section update)

* Content update (MTBF table information update)

* Content update (MTBF table information update)

* Content update (revision table update)

---------

Co-authored-by: José Antonio Bagur Nájera <josea.bagur@gmail.com>

Author: ArduinoBot

content/hardware/04.pro/boards/portenta-h7/datasheets/datasheet.md

@@ -676,6 +676,18 @@ Depending on the variant, some of the components does not apply. The image below
 
 ![Portenta H7 Power Tree](assets/portentaH7powerT.svg)
 
+## Mean Time Between Failure (MTBF)
+
+MTBF, which stands for Mean Time Between Failure, is calculated according to statistical device failures and indicates the reliability of a device.
+
+The MTBF figure (in hours/years) for the Portenta H7 (all variants) can be found in the table below. The MTBF figure was calculated according to the MIL-HDBK-217F part count method.  
+
+| **Standard** | **Portenta H7** | **Environmental Conditions** |
+|:---:|:---:|:---:|
+| MIL-HDBK-217F | 639717 h/73 years | 25 ºC |
+
+**Important note**: MTBF is the statistical representation of the likelihood of a unit failing and _does not necessarily represent a product's life_. 
+
 ## Mechanical Information
 
 ### Board Outline
@@ -689,6 +701,8 @@ Depending on the variant, some of the components does not apply. The image below
 
 ![Connectors positions bottom](assets/portentaH7_connectors_bot.png)
 
+<div style="break-after:page"></div>
+
 ## Certifications
 <table>
    <thead>
@@ -903,9 +917,10 @@ Hereby, Arduino S.r.l. declares that this product is in compliance with essentia
 ## Revision History
 
 | Date       | **Revision** | **Changes**                         |
-| ---------- | ------------ | ----------------------------------- |
+|------------|--------------|-------------------------------------|
+| 06/02/2024 | 6            | MTBF information                    |
 | 05/12/2023 | 5            | Accessories section updated         |
 | 17/10/2023 | 4            | I2C ports information section added |
 | 27/01/2023 | 3            | Add power consumption information   |
 | 18/08/2022 | 2            | Add Secure Element specs (SE050C2)  |
-| 27/12/2021 | 1            | First Release                       |
+| 27/12/2021 | 1            | First Release                       |