RTAX4000SL-CQ352B - 4M-Gate Rad-Tolerant FPGA CQFP-352 | Microchip
MPN: RTAX4000SL-CQ352B ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1 | $1.00 |
| 10 | $1 | $10.00 |
| 100 | $1 | $100.00 |
| 500 | $1 | $500.00 |
| 1,000 | $1 | $1,000.00 |
Drop-in alternatives for RTAX4000SL-CQ352B — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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RTAX4000SL-1CQ352E
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$3840 / Unit
View Datasheet →RTAX4000SL-1CQ352EV
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View Datasheet →RTAX4000SL-CQ352EV
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$10250 / Unit
View Datasheet →RTAX4000SL-CQ352PROTO
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View Datasheet →RTAX4000D-1CQ352B
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$2600 / Unit
View Datasheet →RTAX4000DL-CQ352E
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View Datasheet →RTAX4000D-CQ352E
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View Datasheet →RTAX4000SL-CQ352B Maximum Ratings & Electrical Characteristics
| Family | RTAX-SL (Radiation-Tolerant FPGAs) |
| Equivalent System Gates | 4,000,000 |
| Logic Cells | 40,320 |
| Process Technology | 0.15 um |
| Core Voltage | 1.5 V |
| Package | 352-Pin CQFP |
| Packaging / Shipping | Box |
| Programmable Type | FPGA |
| Radiation Tolerance | Radiation-tolerant (space flight qualified family) |
| Embedded Memory | Embedded SRAM with built-in FIFO control logic |
| Clock Resources | Segmentable clocks, chip-wide highway routing |
| Arithmetic Support | Carry logic |
| Mounting Type | Surface Mount |
RTAX4000SL-CQ352B 352-pin cqfp Pin Configuration Guide
Complete pinout information for RTAX4000SL-CQ352B (352-pin cqfp 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-CQ352B.
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-CQ352B is suitable for 6 applications: Satellite Payload Processing, Spacecraft Bus Control and Avionics, Telemetry and Telecommand Interfaces, Radiation-Exposed Instrumentation and Sensing, Launch Vehicle and Reusable Spacecraft Electronics, Space-Based Communications and Transponder Processing.
Satellite Payload Processing
The RTAX4000SL-CQ352B's 4 million system gates and 40,320 logic cells provide the largest RTAX-SL fabric for on-board payload data processing, including image compression, packetization, and sensor pre-processing in LEO, MEO, and GEO satellites. Its radiation-tolerant 0.15 um fabric with 1.5V core keeps dynamic power low - a decisive factor on constrained satellite power budgets. Embedded SRAM with built-in FIFO control logic buffers high-rate instrument data without external memory, reducing board complexity and a common failure point in flight hardware. Implemented in the 352-pin CQFP ceramic package, it withstands launch vibration and thermal cycling, while live-at-power-up operation ensures the payload is available immediately after spacecraft power application without a configuration device.
Recommended
Spacecraft Bus Control and Avionics
For spacecraft command and data handling (C&DH), attitude control interfaces, and platform avionics, the RTAX4000SL-CQ352B acts as the central glue-logic and interface controller. Segmentable clocks and chip-wide highway routing support multiple independent functional domains - telemetry, telecommand, and actuator interfaces - inside one radiation-tolerant device, replacing dozens of rad-hard SSI/MSI parts and cutting mass, board area, and assembly cost. Carry logic accelerates address generation and CRC computation for CCSDS-style telemetry framing. Because the RTAX-S/SL family is qualified for space flight per Microchip's product page, designers can rely on established SEE and TID heritage data when preparing reliability predictions and design reviews for bus electronics.
Recommended
Telemetry and Telecommand Interfaces
The RTAX4000SL-CQ352B implements MIL-STD-1553, SpaceWire, UART, and custom serial telemetry/telecommand front ends directly in its 4M-gate fabric. The 352-pin CQFP provides abundant I/O for redundant cross-strapped interfaces demanded by spacecraft reliability requirements, while 1.5V core operation limits power dissipation in conduction-cooled enclosures. Embedded SRAM FIFOs decouple asynchronous telemetry rates from downlink timing, and the radiation-tolerant fabric maintains function through total ionizing dose accumulation over multi-year missions. Designs are developed with the standard RTAX-S/SL flow and validated on the RTAX4000SL-CQ352PROTO before flight-lot assembly, per Microchip application note AC170, shortening interface development schedules.
Recommended
Radiation-Exposed Instrumentation and Sensing
Scientific instruments on planetary probes and Earth-observation missions place electronics inside or near the radiation environment. The RTAX4000SL-CQ352B's radiation-tolerant RTAX-SL fabric processes ADC data streams, implements digital filtering with carry logic, and performs event counting with the family's embedded FIFO and clock-conditioning resources. The ceramic CQFP-352 package tolerates the thermal vacuum and vibration profile of launch and cruise phases. With 4 million gates, a single device can integrate instrument sequencer, calibration logic, and compression engine, eliminating separate rad-hard control chips. Live-at-power-up behavior guarantees the instrument is operational at the first power event after the long cruise phase, when re-configuration is not possible.
Recommended
Launch Vehicle and Reusable Spacecraft Electronics
Flight control, sequencing, and safety-critical logic on launch vehicles and reusable spacecraft benefit from the RTAX4000SL-CQ352B's combination of high density and radiation tolerance at comparatively low cost versus full rad-hard ASICs. The true single-chip form factor removes the external configuration device from critical-path electronics, improving system-level reliability for missions with limited recovery opportunities. Segmentable clocks let designers isolate flight-critical timing domains from housekeeping logic on one die. Using the AC170 prototyping flow on commercial Axcelerator devices plus the same-footprint RTAX4000SL-CQ352PROTO, teams can validate control algorithms and timing on fast-turn hardware before committing to flight-lot ceramic-packaged devices, compressing qualification schedules.
Recommended
Space-Based Communications and Transponder Processing
Transponder baseband processing - framing, scrambling, forward-error-correction encoding, and modulation control - fits comfortably within the RTAX4000SL-CQ352B's 4 million gates. The chip-wide highway routing sustains wide data paths between I/O rings and embedded SRAM blocks with FIFO control, supporting sustained throughput for broadcast and relay payloads. The -1 speed grade variants (RTAX4000SL-1CQ352E/EV) provide extra timing margin for high-rate clocks when standard-speed closure is tight, on the same 352-pin CQFP footprint so no board respin is required. Low 1.5V core power and radiation tolerance suit geostationary communications payloads with 15-year mission life and strict power allocations.
Recommended
Recommended Products Summary
Engineering reference data for RTAX4000SL-CQ352B — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | RTAX4000SL-1CQ352E | RTAX4000SL-1CQ352EV | RTAX4000SL-CQ352PROTO | 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 (Actel/Microsemi) | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Equivalent System Gates | 4,000,000 | 4,000,000 | 4,000,000 | 4,000,000 | 4,000,000 |
| Logic Cells | 40,320 | 40,320 | 40,320 | 40,320 | 40,320 |
| Speed Grade | Standard | -1 (faster) | -1 (faster) | Standard (PROTO flow) | -1 (faster) |
| Core Voltage | 1.5 V | 1.5 V | 1.5 V | 1.5 V | 1.5 V |
| Family / DSP Blocks | RTAX-SL (no dedicated DSP blocks) | RTAX-SL (no DSP blocks) | RTAX-SL (no DSP blocks) | RTAX-SL (no DSP blocks) | RTAX-DSP (dedicated DSP blocks) |
| Intended Use | Flight hardware | Flight hardware (higher timing margin) | Engineering-variant flow | Prototyping / development | Flight hardware (DSP processing) |
| Price | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- Largest RTAX-SL density on the compact CQFP-352 footprint (vs RTAX2000SL-CQ352V)
- Dedicated DSP blocks available on same footprint (vs RTAX4000D-1CQ352B)
- Prototyping on the exact flight footprint (vs RTAX4000SL-CQ352PROTO)
- Lower cost at standard speed grade (vs RTAX4000SL-1CQ352E)
Design Notes
Do not substitute speed grades without re-running static timing analysis. RTAX4000SL-CQ352B is the standard speed grade; replacing it with RTAX4000SL-1CQ352E is safe (faster die), but moving a design from a -1 device to the standard grade requires full timing closure re-verification in Libero because setup margins can change on critical paths.
The 352-pin CQFP is a large ceramic quad flat pack with leads on all four sides. Use the manufacturer-recommended land pattern, support corners to relieve lead stress during thermal cycling, and follow datasheet solder-profile limits for ceramic packages to prevent lead cracking. Avoid board warpage by balancing copper on both layers under the package footprint.
Estimated: the 1.5V core of a 4M-gate RTAX-SL fabric can draw significant dynamic current at high toggle rates. Size the core supply rail and decoupling network from the Microchip power estimation tool and the RTAX-S/SL datasheet current tables using your actual design utilization - do not copy figures from smaller RTAX2000 designs. Provide bulk capacitance near the CQFP power pins plus 0.1 uF ceramics at each supply group.
Use the AC170 prototyping flow (Microchip application note 'Prototyping RTAX-S Using Axcelerator Devices') to validate RTL on commercial Axcelerator silicon and the same-footprint RTAX4000SL-CQ352PROTO before ordering flight units. Rad-tolerant CQFP devices are expensive and often long-lead; discovering functional bugs after flight-lot assembly is a schedule-critical failure mode.
Compliance Information
Space-flight ceramic CQFP packaging; AEC-Q100 automotive qualification is not applicable. RoHS/REACH status for this hermetic aerospace package was not stated in the provided web data.
