RTAX2000S-CQ256PROTO - 2M-Gate Rad-Tolerant FPGA Prototype | Microchip
MPN: RTAX2000S-CQ256PROTO ✓ Active| Qty | Unit Price | Extended |
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Drop-in alternatives for RTAX2000S-CQ256PROTO — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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RTAX2000S-1CQ256PROTO
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View Datasheet →RTAX2000SL-CQ256V
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View Datasheet →RTAX2000SL-1CQ256PROTO
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View Datasheet →RTAX2000S-CQ256V
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View Datasheet →RTAX2000SL-1CQ256V
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View Datasheet →RTAX2000S-CQ256PROTO Maximum Ratings & Electrical Characteristics
| System Gates | 2,000,000 |
| Configurable Logic Blocks (CLBs) | 21504 |
| Maximum System Frequency | 350 MHz |
| User I/Os | 136 |
| Process Technology | CMOS |
| Package | CQFP-256 (ceramic quad flat pack, 256 pins) |
| Device Type | PROTO (prototype, non-hermetic package, same functional characteristics as flight unit) |
| Radiation Tolerance | Radiation-tolerant family (RTAX-S) - flight screening applies to hermetic V variants only |
| Programmable Interconnect | Anti-fuse (one-time programmable) |
| Configuration | Live at power-up (LAPU), no external configuration device required |
| Family | RTAX-S/SL Radiation-Tolerant FPGAs |
| Mounting Type | Surface Mount |
| Primary Application Domain | Space-flight systems |
| Qualification Grade | PROTO (non-hermetic; not for flight use) |
RTAX2000S-CQ256PROTO cqfp-256 (ceramic quad flat pack, 256 pins) Pin Configuration Guide
Complete pinout information for RTAX2000S-CQ256PROTO (cqfp-256 (ceramic quad flat pack, 256 pins) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for RTAX2000S-CQ256PROTO.
Refer to the datasheet for full pin configuration.
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
RTAX2000S-CQ256PROTO is suitable for 6 applications: Satellite On-Board Data Handling, Payload Signal Processing, Reprogrammable Prototyping with Aldec Adaptors, Telemetry and Telecommand Interfaces, Launch Vehicle Avionics, Space Instrumentation and Sensor Front Ends.
Satellite On-Board Data Handling
The RTAX2000S-CQ256PROTO fits satellite on-board computer and data-handling subsystems where 2,000,000 system gates of glue logic, bus interfaces, and control functions must be consolidated in a single live-at-power-up device. Its 21,504 CLBs integrate memory controllers, CCSDS framing, and bus bridges that would otherwise require multiple rad-tolerant ASICs, and the 136 user I/Os cover MIL-STD-1553, SpaceWire-class, and low-rate telemetry interfaces. Designers first validate the full data-handling HDL on the low-cost PROTO unit, exploiting identical functional characteristics to the flight die, then transfer to the hermetic CQ256V flight part without PCB respin. Because the anti-fuse fabric needs no external configuration PROM, the design powers up instantly at spacecraft switch-on.
Recommended
Payload Signal Processing
For payload preprocessing chains - FFT pre-filtering, format conversion, and sensor-interface aggregation - the RTAX2000S-CQ256PROTO offers a 350 MHz-class fabric with 21,504 CLBs, enough to host pipelined DSP datapaths alongside interface logic in one radiation-tolerant device. The PROTO device's non-hermetic package keeps prototype cost down while its functionally identical flight die ensures that timing closure and resource utilization results carry over to the flight build. Embedded SRAM blocks implement line buffers and coefficient storage, while the 136 user I/Os connect ADCs and downlink formatters. Teams typically iterate payload algorithms on Aldec ProASIC3E-based adaptors, then commit the verified netlist to the one-time-programmable PROTO part for board-level validation.
Recommended
Reprogrammable Prototyping with Aldec Adaptors
The RTAX2000S-CQ256PROTO is the natural target for Aldec's RTAX prototyping solution, which maps flash-based Microchip ProASIC3E devices onto the CQ208, CQ256, CQ352, and CG624 RTAX footprints. In this flow, engineers develop and debug against the reprogrammable ProASIC3E adaptor, then program the anti-fuse PROTO device to verify the exact production silicon behavior, since PROTO parts carry the same functional characteristics as the flight unit per Microchip's AC170 application note. This two-stage approach de-risks one-time-programmable commitment: any HDL or pinout error surfaces before the final anti-fuse build. The PROTO's CQ256 footprint matches the flight CQ256V exactly, so the completed validation PCB feeds directly into flight assembly.
Recommended
Telemetry and Telecommand Interfaces
Spacecraft TT&C chains demand deterministic, always-on logic from the instant the spacecraft powers up - exactly what the RTAX2000S-CQ256PROTO's live-at-power-up anti-fuse architecture provides, with no configuration time and no single-point configuration-memory failure mode. Its 2,000,000 gates accommodate command decoders, packetizers, time-tag distribution, and redundant cross-strapping among 136 user I/Os, allowing one device to replace several rad-tolerant ASSPs. Prototyping on the CQ256PROTO lets teams verify CCSDS-compliant frame formats and majority-voted command paths on production-equivalent silicon before ordering hermetic flight units. Low static power consumption of the CMOS fabric suits eclipse-mode operation where TT&C logic must remain energized.
Recommended
Launch Vehicle Avionics
Launch-vehicle flight-control and sequencing electronics need high gate counts and short, deterministic paths - the RTAX2000S-CQ256PROTO's 21,504 CLBs and 350 MHz-class fabric host redundant voter logic, motor-control sequencers, and range-safety interfaces with ample timing margin. Ground-segment avionics test benches frequently employ the low-cost PROTO device to exercise the exact netlist that will fly, since Microchip documents that PROTO parts match flight-unit functional characteristics; only the hermetic package and screening differ. The 136 user I/Os handle quadrature feedback, discrete discretes, and redundant serial links, and the single-chip form factor reduces connector count and board area in densely packaged avionics bays. Migration to RTAX2000S-CQ256V requires no board change.
Recommended
Space Instrumentation and Sensor Front Ends
Scientific instruments - star trackers, spectrometers, radiation monitors - use the RTAX2000S-CQ256PROTO to prototype detector timing generators, histogram engines, and housekeeping aggregation in one 2,000,000-gate device. The live-at-power-up fabric ensures the instrument is operational at first light after deployment without a boot sequence, a decisive advantage over SRAM FPGAs vulnerable to configuration upsets at power-on. With 136 user I/Os, the device links directly to CCD/CMOS imagers and ADCs while reserving channels for redundant telemetry. Instrument teams exploit the PROTO's functional identity with the flight die to validate acquisition scripts and timing on real silicon, then order the hermetic RTAX2000SL-CQ256V for flight, keeping the same CQ256 footprint and package outline.
Recommended
Recommended Products Summary
Engineering reference data for RTAX2000S-CQ256PROTO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | RTAX2000S-1CQ256PROTO | RTAX2000SL-CQ256V | RTAX2000S-CQ256V | RTAX2000SL-1CQ256V |
|---|---|---|---|---|---|
| Package | CQFP-256 (non-hermetic PROTO) | CQFP-256 (non-hermetic PROTO) - same | CQFP-256 (hermetic V) - same footprint | CQFP-256 (hermetic V) - same footprint | CQFP-256 (hermetic V) - same footprint |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| System Gates | 2,000,000 | 2,000,000 | 2,000,000 | 2,000,000 | 2,000,000 |
| CLBs | 21504 | 21504 | 21504 | 21504 | 21504 |
| User I/Os | 136 | 136 | 136 | 136 | 136 |
| Speed Grade | Base (fastest) | -1 (standard) | Base (SL process) | Base | -1 (SL process) |
| Qualification Level | PROTO (non-hermetic, not for flight) | PROTO (non-hermetic, not for flight) | Flight-grade (hermetic V) | Flight-grade (hermetic V) | Flight-grade (hermetic V) |
| Process Variant | RTAX-S | RTAX-S | RTAX-SL (improved speed/power) | RTAX-S | RTAX-SL (improved speed/power) |
| Configuration | Anti-fuse, live at power-up | Anti-fuse, live at power-up | Anti-fuse, live at power-up | Anti-fuse, live at power-up | Anti-fuse, live at power-up |
Key Differentiators
- Low-cost functional verification of flight silicon (vs RTAX2000S-CQ256V)
- Fastest speed grade in the same footprint (vs RTAX2000S-1CQ256PROTO)
- Improved process available via SL variant (vs RTAX2000SL-CQ256V)
Design Notes
Never fly the PROTO device. Per Microchip application note AC170, RTAX-S/SL PROTO parts share the flight unit's functional characteristics but use a non-hermetic package and lack the radiation screening and qualification flow of the V-grade part. Budget program cost for both PROTO (verification) and V-grade (flight) devices from the start, since the anti-fuse fabric is one-time programmable and a netlist error on a flight part is unrecoverable.
Verify timing on the correct speed grade. The base RTAX2000S-CQ256PROTO is the fastest grade; if your flight bill of materials uses RTAX2000S-1CQ256PROTO or the SL -1 parts, re-run static timing analysis in Libero against the -1 timing models before committing the anti-fuse program. Timing that closes at the base grade may fail at standard grade, particularly on high fan-out clock nets near the 350 MHz class ceiling.
Design the CQFP-256 land pattern and decoupling once for both PROTO and V parts - the footprints are identical, enabling direct migration. Place low-ESR decoupling capacitors on every core and I/O bank supply pin per the RTAX-S/SL datasheet power guidelines, and use a solid ground plane under the ceramic package. For low-cost board bring-up, consider pairing with Aldec's ProASIC3E-based prototyping adaptor mapped to the CQ256 footprint to gain reprogrammability before anti-fuse commitment.
Compliance Information
Compliance status not published in the provided data; space-grade ceramic-packaged devices are frequently exempt from consumer RoHS scopes. Consult Microchip product compliance documentation for definitive status.
