UT699E LEON 3FT SPARC Microprocessor

Based on the industry-standard SPARC V8 architecture, the UT699E 32-bit Fault Tolerant microprocessor is a system-on-chip and is part of the LEON product family that has a long lineage in the space industry.

The UT699E is an enhanced version of the UT699 featuring a seven-stage pipelined monolithic, high performance fault-tolerant SPARC V8/LEON3FT Processor. Targeted for applications such as:

  • Spacecraft on-board computers
  • Payload processing
  • Nuclear power plant controllers
  • Critical transportation systems
  • High-altitude avionics
  • Medical electronics
  • X-ray cargo scanning.

The UT699E is SPARC V8 compliant so developers may use industry standard compilers, kernels and development tools. A full software development suite is available.


The CAES UT700-LEAP evaluation board and mezzanine companion cards provides a flexible development platform for customers for accelerated development at a minimal cost. The LEAP has a CAES UT700 LEON 3 FT prototype grade device with 8 Mbytes NV memory storage and 32Mbytes SDRAM (both commercial memory), along with one USB UART interface and one 10T/100 Mbit/s Ethernet port. It also includes a JTAG interface for programming and debug of UT700 LEON 3FT (requires XILINX USB Platform Cable) along with one 192-pin mezzanine card expansion connector and an on-board Programmable LEAP main clock.

CAES Software Development
Software Development Tools

CAES Gaisler’s comprehensive software ecosystem includes Bare-C and RTEMS toolchain, Linux, VxWorks, and Zephyr operating system support, TSIM2/3 simulators, GRMON3 debugger, boot loaders and hypervisor support for rapid development support. Template designs are available and portable between technologies. Used to create SoC designs based around the microprocessor core, the LEON and NOEL-V processor models are integrated in the GRLIB IP library.

Key Tech Specs
  • Features:
  • 32-bit SPARC™ V8/LEON 3FT Processor @ 166MHz
  • +1.2V Core Supply
  • Reed Solomon EDAC
  • Separate Instruction and Data Cache Architecture
  • High-Performance Fully Pipelined IEEE-754 FPU
  • Enhanced Pipeline with 1.2 DMIPs / MHz Performance
  • Internally Configured Clock Network
  • +3.3V I/O compatible 
  • Communications Interface
    • Two CAN 2.0 Interfaces
    • Debug Support Unit (SDU)
    • JTAG Interface
    • 10/100 Ethernet Interface
    • GPIO
    • Four SpaceWire Nodes
    • UART Interface
    • PCI 2.2 Interface
    • SPI
    • MIL-STD 1553 BC/RT/MT
  • Software Development tools
  • Applications:
  • Spaceborne Computer
  • System Controller Boards
  • Nuclear Power Plan Controls
  • Critical Transportation Systems
  • Avionics Processing Boards
  • High-Altitude Avionics
  • Medical Electronics
  • X-Ray Cargo Scanning
  • Operational Environment:
  • Temperature Range:-55°C to +105°C
  • Total Ionizing Dose: <100 krad (Si)
  • SEL Immune: ≤110 MeV-cm2/mg
  • Physical:
  • 484-pin CLGA, CBGA, CCGA
  • 28.96 mm x 28.96 mm, 1.27 mm pitch
  • Power:
  • 4W Max
  • Flight Grade:
  • QML-Q, QML-V
  • Export Control Classification Number (ECCN):
  • 9A515.e.1
  • SMD Number:
  • 5962-13238
  • Evaluation Kit:
  • AX9-4250252-001 LEAP Board Stack Package (Main SBC Only) 
    • One LEAP (4350271) card (main SBC & Memory) 
    • One A/C Wall Adapter 
    • One Euro-style A/C interface plate 
    • One US-style A/C interface plate 
    • One LEAP Board User Guide (CD) 
  • AX9-4250252-000 LEAP Board Stack Package (Main SBC and Mezzanine)
    • One LEAP (4350271) card (main SBC & Memory) 
    • One LEAP (4350274) card (mezzanine with SPI display, two CAN bus, two SpaceWire, and dual-redundant CHA/ CHB 1553B ports) 
    • One A/C Wall Adapter 
    • One Euro-style A/C interface plate 
    • One US-style A/C interface plate 
    • One LEAP Board User Guide (CD)
  • Software Development Tools
  • GRTools
  • TSIM
  • Operating System Support




IBIS Model



ADEPT Notifications

This Product information notice is to notify user of Leon 3FT Stale Cache Entry After Store with Data Tag Parity Error.

FTMCTRL: Failing SDRAM Access After Uncorrectable EDAC Error

LEON3/FT AHB Lock Release during Atomic Operation

GRFPU Floating-point controller: Missing FDIV/FSQRT Result

Leon3/FT AHB Deadlock After Sequence of Load and Atomic Instructions

LEON3FT RETT Restart Errata


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