GR740-PBGA Quad-Core LEON4 SPARC V8 Processor


The GR740-PBGA device is the plastic version of the radiation-hard quad-core fault-tolerant LEON4 SPARC V8 processor targeting space constellations.
The GR740-PBGA has the same functionality, fault-tolerance and radiation-hardness as the GR740 system-on-chip device. Here is more information on the GR740 device, which is also applicable to the GR740-PBGA except the package information.
The GR740-PBGA has a Plastic Ball Grid Array (PBGA) with 625 ball, being footprint compatible the GR740 Ceramic Column Grid Array (CCGA), featuring the same pinout and 1mm pitch. 
The GR740-PBGA is made available in to quality and temperature ranges: 
  • GR740-CP-PBGA625 - prototype quality, commercial temperature range
  • GR740-AS-PBGA625 - flight quality (ESCC-Q-60-13C class 2), automotive temperature range  -40C to +105C


  • Prototypes are currently undergoing internal evaluation 
  • Prototypes planned to be available for sale and delivery in Q2 2021
  • Flight parts planned to be available for sale and delivery in Q4 2021
  • For inquiries, please contact This email address is being protected from spambots. You need JavaScript enabled to view it..


  • System frequency: 250 MHz
  • Main memory interface: PC100 SDRAM
  • SpaceWire router with SpaceWire links 200 Mbit/s minimum
  • 33 MHz  PCI 2.3 initiator/target interface
  • Ethernet 10/100/1000 Mbit MACs
  • PBGA625 package


  • See GR740 details.
The GR740-PBGA device is targeted at high-performance general purpose processing on satellite constellations. The architecture is suitable for both symmetric and asymmetric multiprocessing. Shared resources can be monitored to support mixed-criticality applications.

Software Support

We provide development tools such as the GRMON software debugger and various compilers and operating systems and a qualified boot loader for flight.

Quad-Core LEON4 Next Generation Microprocessor Development Board

The GR-CPCI-GR740 evaluation board has been designed for evaluation of the GR740 device (using the GR740 LGA625 component):


Document File
GR740 Data Sheet and User’s Manual
Documentation for GR740-CP, GR740-MP, and flight models.
see GR740 documentation
GR740-PBGA Product Sheet GR740-PBGA-ProductSheet.pdf (April 2020)
GR740 Power Calculator Spreadsheet see GR740 documentation
GR740 Radiation Summary see GR740 documentation