RTAX4000SL-1CQ352B - 4M-Gate Rad-Tolerant FPGA CQFP-352 | Microchip
MPN: RTAX4000SL-1CQ352B ✓ Active| Qty | Unit Price | Extended |
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Drop-in alternatives for RTAX4000SL-1CQ352B — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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RTAX4000SL-CQ352B
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View Datasheet →RTAX4000SL-1CQ352E
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View Datasheet →RTAX4000SL-1CQ352EV
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View Datasheet →RTAX4000SL-CQ352PROTO
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View Datasheet →RTAX4000D-1CQ352B
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View Datasheet →RTAX4000DL-CQ352E
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View Datasheet →RTAX4000DL-CQ352V
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View Datasheet →RTAX4000SL-1CQ352B Maximum Ratings & Electrical Characteristics
| Family | RTAX-SL Radiation-Tolerant FPGA |
| Equivalent System Gates | 4,000,000 gates |
| Logic Cells | 60,480 |
| CLBs (Clocked Logic Blocks) | 40,320 |
| Process Technology | 0.15 um |
| Core Supply Voltage | 1.5 V |
| Package | 352-Pin CQFP (ceramic quad flat pack) |
| Speed Grade | -1 |
| Programming Technology | Anti-fuse, one-time programmable |
| Power-Up Behavior | Live at power-up (no external configuration device) |
| Embedded Memory | Embedded SRAM with built-in FIFO control logic |
| Clock Features | Segmentable clocks, chip-wide resources |
| Radiation Tolerance | Radiation-tolerant, for space flight systems |
| Base Architecture | Axcelerator (commercial) derived |
| Mounting Type | Surface Mount |
RTAX4000SL-1CQ352B 352-pin cqfp (ceramic quad flat pack) Pin Configuration Guide
Complete pinout information for RTAX4000SL-1CQ352B (352-pin cqfp (ceramic quad flat pack) 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 RTAX4000SL-1CQ352B.
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
RTAX4000SL-1CQ352B is suitable for 6 applications: Satellite Payload Data Processing, Spacecraft Telemetry and Telecommand (TMTC), Instrument Control for Scientific Probes, Spacecraft Bus Avionics, Onboard Reconfigurable Interfaces and Glue Logic, Radiation-Tolerant Embedded Processing Assist.
Satellite Payload Data Processing
The RTAX4000SL-1CQ352B fits payload data processing because its 4,000,000 system gates and 60,480 logic cells provide enough fabric for framing, encryption, compression, and channel coding pipelines, while the embedded SRAM blocks with built-in FIFO control logic buffer high-rate sensor or downlink data without external memory. Because the anti-fuse configuration is immune to configuration-memory upsets, the payload avoids the scrubbing controller and external configuration flash that SRAM FPGAs demand, saving board area, mass, and a failure mode. Placed between the payload ADC or sensor chain and the downlink formatter, the device runs from a 1.5V core with the SL low-power process reducing static power - a direct benefit when payload power budgets are counted in watts. Designers typically implement the datapath in HDL, verify on the PROTO unit or A3PE3000 commercial equivalent, then program flight devices in the CQFP-352 hermetic package.
Recommended
Spacecraft Telemetry and Telecommand (TMTC)
The RTAX4000SL-1CQ352B suits TMTC subsystems because live-at-power-up operation means command decode and housekeeping logic are functioning the instant the spacecraft bus energizes, with no configuration load time and no reliance on an external boot memory that could itself fail. The 40,320 CLB fabric comfortably implements CCSDS-compliant frame sync, decoders, and mailbox interfaces to the onboard computer, while segmentable clock resources let designers isolate the timing domains of the RF front end from the digital section. In a typical topology the FPGA sits between the receivers/transponders and the OBC, latching command words and formatting telemetry over redundant interfaces. The single-chip, hermetic CQFP-352 package supports the reliability and traceability expectations of flight avionics, and the anti-fuse fabric eliminates SEU-driven loss-of-configuration - historically a dominant TMTC failure consideration.
Recommended
Instrument Control for Scientific Probes
Scientific instruments on orbiters and deep-space probes use the RTAX4000SL-1CQ352B as the central sequencer and data-acquisition controller because the 4M-gate fabric implements detector timing generators, histogram engines, and interface glue logic in one rad-tolerant device. The 0.15 um anti-fuse process tolerates the total ionizing dose accumulated over multi-year missions, and one-time programming locks the instrument's control logic against radiation-induced configuration corruption during cruise and encounter phases. The embedded SRAM with FIFO control captures detector bursts, while the low-power SL process reduces dissipation inside thermally constrained instrument enclosures. Development flows commonly pair this flight device with the A3PE3000 commercial family (same Axcelerator-derived architecture) for fast iteration, then transfer the verified design to the CQFP-352 flight unit, preserving timing characteristics across the migration.
Recommended
Spacecraft Bus Avionics
For attitude control, power switching supervision, and redundancy-management logic, the RTAX4000SL-1CQ352B offers a radiation-tolerant, single-chip programmable platform that is live at power-up - important in avionics where the FPGA must support safe-mode entry immediately after reset. Its 60,480 logic cells implement voter logic, watchdog circuits, sensor interfaces, and MIL-STD-style serial links, while true single-chip operation removes the external configuration device that would otherwise represent a common-point failure. The ceramic CQFP-352 hermetic package and through-hole-friendly gull-wing leads fit conventional space-qualified assembly and inspection flows. Compared with rad-hard ASICs, the programmable fabric lets one board design serve multiple spacecraft variants by reprogramming flight devices before assembly, reducing non-recurring cost for low-volume, high-reliability bus electronics programs.
Recommended
Onboard Reconfigurable Interfaces and Glue Logic
Spacecraft frequently mix legacy interfaces (RS-422, MIL-STD-1553 companion logic, discrete discretes) with newer payloads, and the RTAX4000SL-1CQ352B bridges them: the 4M-gate fabric absorbs protocol conversion, bus bridges, and general glue logic that would otherwise consume dozens of rad-hard SSI/MSI parts. Consolidation into one CQFP-352 device cuts component count, board area, and solder-joint failure points - all directly correlated with launch reliability. Because the part is one-time programmable, the interface map is frozen and auditable, simplifying configuration management for programs with strict change control. Designers implement the bridge using the same Axcelerator tool flow proven on commercial A3PE3000 devices, then program the RTAX-SL flight units; the low-power SL process keeps quiescent dissipation negligible when interfaces idle between ground contacts.
Recommended
Radiation-Tolerant Embedded Processing Assist
Where a rad-hard processor needs a programmable co-processor, the RTAX4000SL-1CQ352B accelerates algorithms with soft-implemented datapaths, CRC/encryption engines, and the FIFO-backed embedded SRAM, offloading the main CPU and deterministically bounding latency. The RTAX-DSP sibling (RTAX4000D-1CQ352B) adds dedicated multiply-accumulate blocks; when the workload is control-dominated rather than multiply-dominated, the SL variant's uniform fabric uses its 60,480 logic cells efficiently while drawing lower static power from the 1.5V core. Typical usage ties the FPGA to the processor via a local bus or memory-mapped window, with the segmentable clock network isolating the co-processor clock domain. The anti-fuse configuration guarantees the accelerator image is resident at power-up with no loader software - a meaningful simplification for boot-critical flight software architectures.
Recommended
Recommended Products Summary
Engineering reference data for RTAX4000SL-1CQ352B — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | RTAX4000SL-CQ352B | RTAX4000SL-1CQ352E | RTAX4000SL-1CQ352EV | RTAX4000D-1CQ352B |
|---|---|---|---|---|---|
| Package | 352-Pin CQFP | 352-Pin CQFP - same | 352-Pin CQFP - same | 352-Pin CQFP - same | 352-Pin CQFP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Equivalent Gates | 4,000,000 | 4,000,000 | 4,000,000 | 4,000,000 | 4,000,000 |
| Logic Cells | 60,480 | 60,480 | 60,480 | 60,480 | 60,480 |
| Speed Grade | -1 | Standard (no -1 suffix) | -1 | -1 | -1 |
| Process / Core Voltage | 0.15 um, 1.5 V | 0.15 um, 1.5 V | 0.15 um, 1.5 V | 0.15 um, 1.5 V | 0.15 um, 1.5 V |
| Low-Power SL Process | Yes (SL) | Yes (SL) | Yes (SL) | Yes (SL) | No (D = DSP variant) |
| Screening / Use Intent | B designation (flight) | Flight grade | E screening flow | EV screening flow | B designation (flight) |
| Price Tier (qty 1) | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- Low-power SL process option (vs RTAX4000D-1CQ352B)
- Speed-grade -1 timing margin (vs RTAX4000SL-CQ352B)
- Flight-grade B screening (vs RTAX4000SL-CQ352PROTO)
- Uniform fabric (no DSP block area tax) (vs RTAX4000DL-CQ352E)
Design Notes
RTAX-SL devices are anti-fuse, one-time programmable. Never program a flight unit until the bitstream has passed full simulation, timing analysis, and hardware validation on the RTAX4000SL-CQ352PROTO or a commercial Axcelerator A3PE3000 counterpart. A post-programming design change requires a new device, which for flight-grade screening can mean long replacement lead times. Maintain configuration-managed, checksum-verified programming files and program spares alongside flight units.
Estimated: core dissipation depends on toggle rate; at a 1.5V core supply the SL low-power process minimizes static current, but dynamic power scales with clock frequency and activity factor. Use the Microchip (Actel) power calculator with post-layout netlist statistics before freezing the power budget, and verify I/O bank current per the RTAX-S/SL datasheet electrical tables. Decouple all VCC and VCCA supplies with ceramic capacitors placed at each power pin pair of the CQFP-352, and follow the datasheet's recommended power-up sequencing.
The 352-lead CQFP has gull-wing leads on a 0.5 mm-class pitch; design the land pattern per the package drawing in the RTAX-S/SL datasheet and your assembler's space-qualified IPC-class process. Hermetic ceramic packages have a low-expansion alumina body - manage thermal expansion mismatch with appropriate board materials for wide-temperature missions. Support leads mechanically at the corners during vibration environments, and inspect solder joints with X-ray or optical methods per program workmanship standards.
Compliance Information
Space-qualified hermetic ceramic CQFP; compliance declarations not stated in verified web data. Microchip qualifies related RTAX parts against DLA drawing numbers per Mil Prf 38535 (class Q/V) per the DLA Cross Reference Guide; verify RoHS/REACH documentation with the manufacturer for this specific MPN.
