RTAX4000S-CQ352V - 4M-Gate Rad-Tolerant FPGA | Microchip
MPN: RTAX4000S-CQ352V ✓ Active| Qty | Unit Price | Extended |
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Drop-in alternatives for RTAX4000S-CQ352V — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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RTAX4000S-1CQ352V
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View Datasheet →RTAX4000SL-CQ352V
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$2800 / Unit
View Datasheet →RTAX4000SL-CQ352E
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View Datasheet →RTAX2000S-CQ352V
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View Datasheet →RTAX4000D-1CQ352E
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$3000 / Unit
View Datasheet →RTAX4000DL-1CQ352B
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View Datasheet →5962-0822402QXC
✅ Drop-In📋 Reference alternative (not in catalog)
RTAX4000S-CQ352V Maximum Ratings & Electrical Characteristics
| Family | RTAX-S/SL Radiation-Tolerant FPGAs |
| Equivalent System Gates | 4,000,000 gates |
| Combinational Logic Blocks | 40,320 |
| Logic Cells | 60,480 |
| Technology | CMOS, antifuse (OTP) |
| Package | CQ352 (352-pin ceramic column grid array) |
| Radiation Tolerance | Radiation-tolerant (space-flight grade) |
| Configuration | Live at power-up, single-chip, no external configuration device |
| Embedded Memory | Embedded SRAM with built-in FIFO control logic |
| Clock Resources | Segmentable clocks, chip-wide highway routing |
| Architecture Base | Axcelerator commercial FPGA family |
| Application Domain | Space-flight systems |
| Screening | Standard vs SL variant distinguished by ICCA limits at 125C final electrical test |
RTAX4000S-CQ352V cq352 (352-pin ceramic column grid array) Pin Configuration Guide
Complete pinout information for RTAX4000S-CQ352V (cq352 (352-pin ceramic column grid array) 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 RTAX4000S-CQ352V.
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
RTAX4000S-CQ352V is suitable for 6 applications: Satellite Payload Data Processing, Spacecraft Bus Control and Housekeeping, Telemetry and Telecommand (TT&C) Interfaces, Deep Space Mission Avionics, Radiation-Tolerant Glue Logic Integration, Earth Observation Instrument Control.
Satellite Payload Data Processing
The RTAX4000S-CQ352V fits satellite payload processing because its 4,000,000 equivalent gates and 60,480 logic cells provide enough capacity for on-board data compression, formatting, and high-rate interfacing, while its antifuse CMOS fabric is immune to configuration upsets that plague SRAM FPGAs in orbit. According to Microchip, RTAX-S devices offer live-at-power-up operation, so payload logic is functional immediately after spacecraft power application without a configuration device - valuable during launch and safe-mode events. In use, the FPGA bridges payload sensors to downlink chains through its embedded SRAM with FIFO control logic, buffering data rate mismatches between acquisition and telemetry. The trade-off is that antifuse programming is one-time, so all payload logic must be fully verified before flight-unit programming.
Recommended
Spacecraft Bus Control and Housekeeping
For spacecraft bus control - power switching sequencing, attitude-control interfacing, and mode management - the RTAX4000S-CQ352V offers a true single-chip solution that replaces multiple rad-hard ASSPs, reducing board area, connector count, and failure modes. Its segmentable clocks and chip-wide highway routing let designers distribute low-skew timing across bus-control state machines spread over the 4M-gate fabric. The live-at-power-up antifuse architecture guarantees that critical power-on sequencing logic is operational the instant primary power arrives, without waiting for configuration loads. Designers typically dedicate a portion of the 40,320 combinational logic blocks to watchdog and voting functions for fault tolerance. The main consideration is that the single-chip form factor concentrates critical functions in one device, requiring SEU-hardened design practices such as triple modular redundancy in the RTL.
Recommended
Telemetry and Telecommand (TT&C) Interfaces
TT&C subsystems benefit from the RTAX4000S-CQ352V's deterministic, configuration-upset-immune fabric: telecommand decoders and telemetry encoders must be continuously correct, and the one-time-programmable antifuse technology eliminates the configuration-memory single-event upset mechanism entirely. The device's embedded SRAM blocks with built-in FIFO control logic implement frame buffering between the spacecraft low-rate telemetry bus and the RF ground link, while 60,480 logic cells accommodate CCSDS-compliant framing and scrambling functions. Live-at-power-up operation ensures the TT&C chain is reachable during spacecraft initial acquisition, when no processor software has yet booted. Performance-wise, the Axcelerator-derived fabric easily handles the megabit-per-second class data rates typical of TT&C links, leaving timing margin well below the family's maximum clock frequencies.
Recommended
Deep Space Mission Avionics
Deep space missions face total ionizing dose levels and galactic cosmic-ray fluxes far beyond low Earth orbit, making the RTAX4000S-CQ352V's radiation-tolerant qualification and OTP antifuse fabric a natural fit for avionics FPGA roles. Microchip positions RTAX-S as suitable for 'low Earth orbit, deep space or anything in between.' The ceramic CQ352 column grid array package survives launch vibration, thermal vacuum cycling, and hermetic-seal requirements of deep-space avionics trays. In avionics designs, the 4M-gate capacity hosts sensor interfaces, fault-management logic, and subsystem glue logic in one device, cutting mass - a direct launch-cost benefit. Because SEU rates rise with mission distance, designers pair the hardened fabric with TMR and EDAC structures; the ample logic cells make these overhead architectures practical within a single chip.
Recommended
Radiation-Tolerant Glue Logic Integration
Spacecraft designs frequently accumulate legacy rad-hard ASSPs, MIL-STD-1553 interfaces, discrete decoding, and bus bridges. The RTAX4000S-CQ352V consolidates these into one 4M-gate device: with 40,320 combinational logic blocks and chip-wide highway routing, engineers integrate address decoders, bus transceiver logic, interrupt controllers, and custom peripherals that would otherwise occupy dozens of rad-hard SSI/MSI packages. Live-at-power-up antifuse behavior means housekeeping decode logic works from the first power cycle, and the single-chip form factor shrinks board area and solder joints - both reliability and mass wins for space hardware. The embedded SRAM with FIFO control absorbs rate mismatches between legacy buses and modern processors. The one-time-programmable constraint means interface protocols must be frozen before flight-lot programming, so thorough simulation of all bus traffic corner cases is essential.
Recommended
Earth Observation Instrument Control
Earth-observation payloads - imagers, spectrometers, radar front ends - need high-density, low-power FPGA control for detector timing, ADC interfacing, and on-board preprocessing. The RTAX4000S-CQ352V's low-power CMOS antifuse fabric minimizes instrument heat load, which directly benefits thermal design of optical benches, and its 4M gates accommodate detector sequencer trees plus real-time gain/offset correction pipelines. The family's embedded SRAM blocks implement line buffers for pushbroom sensor readout, while segmentable clocks generate the multi-phase timing grids detector arrays require. Single-chip live-at-power-up operation keeps instrument electronics safe through launch and early-orbit checkout without configuration uploads. According to Microchip, low power combined with radiation tolerance is what makes RTAX-S the FPGA of choice for space-flight system designers; instrument control is a canonical example of that value proposition.
Recommended
Recommended Products Summary
Engineering reference data for RTAX4000S-CQ352V — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | RTAX4000S-1CQ352V | RTAX4000SL-CQ352V | RTAX2000S-CQ352V | RTAX4000D-1CQ352E |
|---|---|---|---|---|---|
| Brand | Microchip Technology (Actel/Microsemi) | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | CQ352 | CQ352 - same | CQ352 - same | CQ352 - same | CQ352 - same |
| Equivalent System Gates | 4,000,000 | 4,000,000 | 4,000,000 | [DATA_NEEDED] | 4,000,000 (with DSP blocks) |
| Logic Cells | 60,480 | 60,480 | 60,480 | [DATA_NEEDED] | [DATA_NEEDED] |
| Speed Grade | Standard | -1 (faster) | Standard | Standard | -1 (faster) |
| Screening | Standard (S) | Standard (S) | SL (tighter ICCA limits at 125C) | Standard (S) | D/E flow |
| DSP Blocks | No | No | No | No | Yes (RTAX-DSP) |
| Configuration Technology | Antifuse OTP, live at power-up | Antifuse OTP, live at power-up | Antifuse OTP, live at power-up | Antifuse OTP, live at power-up | Antifuse OTP, live at power-up |
| Target Application | Space-flight, general payload/bus | Space-flight, timing-critical | Space-flight, tight screening programs | Space-flight, mid-density | Space-flight, DSP-heavy payloads |
Key Differentiators
- Maximum family density in the CQ352 footprint (vs RTAX2000S-CQ352V)
- Configuration-upset-immune antifuse fabric (vs SRAM-based space FPGAs)
- Screening flexibility within the same footprint (vs RTAX4000SL-CQ352V)
- Trade-off: no DSP blocks (vs RTAX4000D-1CQ352E)
Design Notes
RTAX4000S is one-time programmable: every programmed flight unit is consumed. Complete full RTL simulation, static timing analysis, and - where possible - hardware prototyping on the flash-based ProASIC3E adaptor (Microchip/Aldec RTAX prototyping solution) before programming flight lots. Do not iterate designs on flight hardware. Also confirm whether your program requires the S or SL screening flow, since ICCA current limits are tested at 125C final electrical test and lots are differentiated accordingly (source: Microsemi/Mouser RTAX-S documentation).
The CQ352 is a ceramic column grid array using solder columns rather than balls; design the land pattern per the manufacturer datasheet (ds2169) column layout and verify pad geometry against your board fabricator's capability. Plan escape routing for 352 columns early; column-grid arrays tolerate slightly larger pads than BGA but column coplanarity and reflow profiles differ. Check board-level CTE mismatch against spacecraft panel materials, and note that CG1272/LG1272 body sizes differ between RTAX4000S and RTAX4000D devices if your program uses multiple densities.
Antifuse CMOS architecture keeps static power low versus SRAM-based space FPGAs, supporting thermal budgets on optical benches and avionics trays. Obtain exact core/I-O supply voltages and ICCA limits from the RTAX-S/SL datasheet (ds2169) for your power budget - public listings do not state these numerically. Use the segmentable clock conditioning circuitry to gate unused clock domains, further reducing dynamic power in payload sections that operate only during observation windows.
Use the chip-wide highway routing resources for global, high-fan-out signals (resets, mode lines) to minimize skew across the 60,480-cell fabric. Assign telecommand and safety-critical inputs to dedicated I/O with Schmitt or registered inputs where supported, and apply triple modular redundancy in RTL for state machines susceptible to SEU-induced state corruption in high-radiation orbits. Simulate timing at the chosen speed grade; the -1 (RTAX4000S-1CQ352V) grade offers faster timing if closure fails at standard grade.
Compliance Information
Space-grade ceramic CQ352 package; AEC-Q100 automotive qualification is not applicable. RoHS/REACH status for hermetic ceramic space packages not stated in provided data - verify with Microchip space product compliance documentation.
