Q MICROCHIP
14
Functional Safety and Robust Usages
Safety Critical Applications and
Class B Certification
PIC24 MCUs and dsPIC33 DSCs include integrated safety
features to ease implementation of IEC 60730 compliance for
Class B safety.
The CRC provides a memory integrity check and devices also
include memory error correction. In addition, dsPIC33 devices
with Error-Correcting Code (ECC) include 2-bit error detection
and single-bit error correction for enhanced reliability, com-
pletely transparent and real-time implementation.
The memory also has read/write protection capability to protect
sections of memory from code flow changes or interrupt vec-
tors. You can establish zones that have different permissions,
and you can define secure areas that should not be entered
without the proper permissions.
Products include a backup system oscillator for system
redundancy as well as clock-fail detection. A windowed
watchdog timer will detect and reset the MCU in event of code
execution error, with a dedicated clock source independent
of the system clock. A Dead-Man Timer (DMT), clocked from
the main system clock, is useful for detecting and recovering
software malfunctions. The PWMs include fault detection
features and the CPU includes trap instructions and illegal
opcode detection.
The UL and VDE certified Class B software stack helps to
simplify IEC 60730 regulatory compliance. This library routines
integrate into the MCU application to test and verify the critical
functionalities without affecting the end application. For more
information, visit www.microchip.com/16bitfunctionalsafety.
Robust Package Options for IPC-9592B
Some dsPIC33 “GS” devices are available with robust pack-
age options to help with operation in extremely noisy environ-
ments. These packages make it easier to achieve IPC-9592B
qualification. Options include a 28-pin µQFN (4 × 4 mm) or 28-
pin µQFN (6 × 6 mm). These package options are designed
to withstand temperature cycling as defined in IPC-9592B
with over 700 cycles of −40°C/+125°C on thick high-layer
count PCBs.
Robust 3V Operation
With operating voltages as low as 1.8V and up to 3.6V, PIC24
MCUs and dsPIC33 DSCs ensure robust operation such as:
• POR/BOR/Watchdog Timer (WDT)
• Support for temperatures up to 150°C
• AEC-Q100 Grade 0 qualification for automotive
applications
Enhanced Robustness with 5V Operation
Microchip’s PIC24 MCU and dsPIC33 DSC portfolios include
families that operate up to 5V for increased noise immunity and
robustness. Devices with 5V operation provide more dynamic
range for signals and improved sensitivity. The 5V devices
include additional features to ensure robust operation such as:
• Backup system oscillator
• Windowed watchdog timer (WWDT)
• PWM with fault detection
• Support for temperatures up to 150°C
• AEC-Q100 Grade 0 qualification for
automotive applications
Families with 5V Operation Flash Pins
dsPIC33 “EV” DSC Family 32–256 KB 28–64
PIC24F “KM” and “KA” MCU Family 8–32 KB 20–44
Extreme Temperatures and
AEC-Q100 Qualification
A variety of devices are also rated for operation up to 125°C
or 150°C ambient temperature for the most extreme automo-
tive and industrial applications, including AEC-Q100 Grade
0 qualification. Some target applications require operation in
extreme environmental conditions. PIC24 MCUs and dsPIC33
DSCs have options for standard (85°C), extended tempera-
ture (125°C) and even high temperature up to 150°C.
For automotive applications, our products support AEC-Q100
Grade 0 level qualification for 150°C support, especially help-
ful for under-the-hood systems. Fore more information, visit
www.microchip.com/hightemp.
Temperature Ranges Range Part Number Suffix
Standard −40 to 85°C -I
Extended −40 to 125°C -E
High −40 to 150°C -H
www.microchip.com/hightemp
www.microchip.com/16bitfunctionalsafety