951200602R

Overview

The Microchip SAMRH71 (951200602R) is a radiation-hardened Arm Cortex-M7 microcontroller designed for space applications. It operates at 100 MHz, delivering over 200 DMIPS performance within a CQFP256 hermetic ceramic package. The device features 128 KB embedded Flash and up to 1.15 MB of SRAM, all with built-in Error Correction Code (ECC). Key interfaces include SpaceWire, MIL-STD-1553B, CAN FD, and Ethernet with TSN. It supports QML-V and ESCC QPL qualifications, ensuring reliability in high-radiation environments.

Feature Summary

• Radiation-hardened design with latchup immunity exceeding 62 MeV.cm²/mg and total ionizing dose tolerance of 15 krad.
• Integrated high-bandwidth space communication interfaces including SpaceWire with RMAP and MIL-STD-1553B.
• High-performance Arm Cortex-M7 core with hardware floating-point unit and DSP instructions.
• Comprehensive memory architecture with ECC protection across embedded Flash and multiple SRAM banks.

Applications

• Spacecraft onboard computers
• Satellite subsystems requiring high reliability
• Harsh environment avionics systems

Procurement Notes

Verify the specific ordering suffix against the Product Selection Guide to confirm qualification level. The base part number corresponds to the SAMRH71F20C-7GB variant. Ensure the required package type matches the application constraints. Confirm that the ESCC QPL or QML-V equivalent status aligns with mission compliance requirements before finalizing procurement.

Selection Notes

Select this component when mission-critical reliability in high-radiation environments is required. The CQFP256 hermetic package is suitable for long-duration space missions. Consider the available software ecosystem, including FreeRTOS and RTEMS support, for development efficiency. Evaluate the external memory controller capabilities if additional storage beyond internal limits is needed.

Part Context

The SAMRH71 represents Microchip's expansion into radiation-hardened Arm-based processors for the aerospace sector. Developed with support from ESA and CNES, it bridges the gap between consumer-grade Arm ecosystems and space-grade reliability. This MCU allows developers to utilize standard tools while meeting strict environmental standards.

Replacement Considerations

The datasheet lists 951200601R as an ESCC QPL RHA equivalent. Other variants like SAMRH71F20C-7GB-SV are noted as QML-V equivalents. Verify pinout and electrical specifications compatibility before substituting any related part numbers.

FAQ

What is the Total Ionizing Dose (TID) tolerance of the SAMRH71?

The SAMRH71 has a Total Ionizing Dose (TID) tolerance of 15 krad when equipped with Flash memory.

Does the SAMRH71 support real-time clock functionality?

Yes, it includes a Real-Time Clock (RTC) with Gregorian calendar and UTC mode, along with a 32-bit low-power Real-Time Timer (RTT).