RTAX4000SL-CQ352PROTO - 4M-Gate Radiation-Tolerant FPGA | Microchip
MPN: RTAX4000SL-CQ352PROTO ✓ Active| Qty | Unit Price | Extended |
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| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
Drop-in alternatives for RTAX4000SL-CQ352PROTO — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
RTAX4000SL-1CQ352PROTO
✅ Drop-In📋 Reference alternative (not in catalog)
RTAX4000SL-CQ352EV
✅ Drop-In✓ In Stock
$10250 / Unit
View Datasheet →RTAX4000SL-1CQ352E
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$3840 / Unit
View Datasheet →RTAX4000D-CQ352V
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Contact for price
View Datasheet →5962-0822406QXC
✅ Drop-In📋 Reference alternative (not in catalog)
RTAX4000SL-CQ352PROTO Maximum Ratings & Electrical Characteristics
| Family | RTAX-S/SL Radiation-Tolerant FPGAs |
| Equivalent System Gates | 4,000,000 |
| Logic Cells | 60,480 |
| CLBs | 40,320 |
| CLB Combinatorial Delay (Max) | 1.1 ns |
| Technology | CMOS, antifuse (one-time programmable) |
| Package | CQFP-352, ceramic metal-sealed cofired |
| Mounting Type | Surface Mount |
| Operating Temperature | -55C to +125C |
| Embedded Memory | Embedded SRAM with built-in FIFO control logic |
| Clock Architecture | Segmentable clocks, chip-wide highway routing |
| Arithmetic Support | Dedicated carry logic |
| Configuration | Live-at-power-up, no external configuration device |
| Target Market | Space-flight systems |
RTAX4000SL-CQ352PROTO cqfp-352, ceramic metal-sealed cofired Pin Configuration Guide
Complete pinout information for RTAX4000SL-CQ352PROTO (cqfp-352, ceramic metal-sealed cofired 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-CQ352PROTO.
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-CQ352PROTO is suitable for 6 applications: Satellite Payload Data Processing, Spacecraft Command and Data Handling (C&DH), Telecommunication Transponder Control, Launch-Vehicle Avionics, FPGA Prototyping and Design Verification, Space Instrumentation and Scientific Sensors.
Satellite Payload Data Processing
The RTAX4000SL-CQ352PROTO fits satellite payload processing because it delivers 4,000,000 equivalent gates and 60,480 logic cells of single-chip programmable logic while tolerating the total ionizing dose and single-event environment of low-Earth and geostationary orbits. Its embedded SRAM blocks with built-in FIFO control logic absorb high-rate sensor and downlink data streams, while dedicated carry logic accelerates forward-error-correction and formatting arithmetic. Deployed between an ADC/serializer chain and the downlink modulator, the antifuse fabric is live at power-up with no configuration device, eliminating a common single-point failure in orbit. The trade-off is one-time programmability: logic must be frozen before launch, so prototyping on an Aldec CQ352 adaptor first is strongly recommended.
Recommended
Spacecraft Command and Data Handling (C&DH)
Spacecraft bus C&DH units benefit from the RTAX4000SL-CQ352PROTO's combination of 40,320 CLBs, segmentable clocks, and chip-wide highway routing, which allow telemetry formatting, decoder, and housekeeping functions to be integrated in one radiation-tolerant device. The -55C to +125C operating range and ceramic metal-sealed CQFP-352 package suit the thermal and outgassing constraints of bus electronics. Because the antifuse configuration is inherently SEU-immune at the configuration level, only user registers require scrubbing, simplifying watchdog architectures. In a typical design the FPGA bridges a MIL-STD-style bus interface to payload modules; the PROTO flow supports iterative development of this glue logic before flight-lot commitment on the identical footprint.
Recommended
Telecommunication Transponder Control
Transponder control logic demands deterministic timing and radiation tolerance simultaneously; the RTAX4000SL-CQ352PROTO offers a maximum CLB combinatorial delay of 1.1 ns and the RTAX-S/SL timing predictability derived from the Axcelerator architecture, enabling tight control loops for gain stepping, beacon switching, and alarm handling. The 4M-gate fabric accommodates multiple redundant control channels in a single ceramic CQFP-352 device, reducing board area and connector count in the repeater shelf. Embedded FIFO-backed SRAM buffers telemetry bursts between the RF modem and the housekeeping processor. Designers should budget timing margins with Microchip's Libero SoC timing models and validate on the PROTO part before ordering screened flight units such as RTAX4000SL-CQ352EV.
Recommended
Launch-Vehicle Avionics
Launch-vehicle flight computers and sequencing units operate for only minutes but must survive severe vibration, dose, and single-event environments; the RTAX4000SL-CQ352PROTO's ceramic cofired package, surface-mount CQFP-352 lands, and antifuse live-at-power-up configuration address exactly these constraints. With 60,480 logic cells, the device implements redundant two-out-of-three voting, event sequencing, and safe-and-arm interface logic without a boot memory that could be corrupted during ascent. The -55C to +125C rating covers pre-launch ground soak through ascent thermal transients. Teams typically close timing at the -1 speed grade (RTAX4000SL-1CQ352PROTO) while prototyping, then migrate to the same-footprint flight variant for the mission lot.
Recommended
FPGA Prototyping and Design Verification
The PROTO suffix makes this ordering option the natural vehicle for pre-flight design verification. Antifuse RTAX silicon is one-time programmable, so Microchip's sanctioned methodology pairs a footprint-compatible adaptor board - such as the Aldec ACT-H3Ki-CQ352, powered via CQ352 leads or onboard connector and programmed over JTAG - with a flash-based ProASIC3E device for unlimited recompile cycles. Designs are then migrated to RTAX using an EDIF netlist and pinout converter, as described in the RTAX-S/SL datasheet. Working with the physical RTAX4000SL-CQ352PROTO in the real socket validates signal integrity, power distribution, and timing of the actual CQFP-352 footprint before expensive flight silicon is programmed.
Recommended
Space Instrumentation and Scientific Sensors
Scientific payloads - imagers, spectrometers, particle detectors - require glue logic that survives multi-year missions; the RTAX4000SL-CQ352PROTO provides 4M gates of SEU-tolerant fabric for detector timing, coincidence logic, and compression pipelines. Its low static power consumption, a hallmark of the antifuse RTAX-S/SL family, directly reduces the instrument's power budget and thermal load, which matters for smallsats and deep-space probes alike. Embedded SRAM FIFOs stage burst data from sensor front-ends into onboard processors. The chip-wide highway routing simplifies wide datapaths typical of imaging chains. Instruments with heavy multiply-accumulate workloads should consider the same-footprint RTAX4000D-CQ352V DSP variant instead.
Recommended
Recommended Products Summary
Engineering reference data for RTAX4000SL-CQ352PROTO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | RTAX4000SL-1CQ352PROTO | RTAX4000SL-CQ352EV | RTAX4000SL-1CQ352E | RTAX4000D-CQ352V | 5962-0822406QXC |
|---|---|---|---|---|---|---|
| Package | CQFP-352 ceramic metal-sealed cofired | CQFP-352 - same | CQFP-352 - same | CQFP-352 - same | CQFP-352 - same | S-CQFP-F352 - same footprint |
| Brand | Microchip Technology (Actel/Microsemi) | 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 | 4,000,000 |
| Logic Cells | 60,480 | 60,480 | 60,480 | 60,480 | 60,480 | 60,480 |
| Speed Grade | Standard | -1 (faster) | [DATA_NEEDED] | -1 | [DATA_NEEDED] | [DATA_NEEDED] |
| Screening Flow | PROTO (prototyping) | PROTO | Flight/screened (V flow) | Engineering (E flow) | Flight/screened (V flow) | SMD military flow |
| CLB Combinatorial Delay (Max) | 1.1 ns | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| DSP MAC Blocks | No (standard SL fabric) | No | No | No | Yes (RTAX-DSP variant) | No |
| Operating Temperature | -55C to +125C | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- Prototyping-flow ordering option for OTP silicon (vs RTAX4000SL-CQ352EV)
- Same-density DSP fabric option on identical footprint (vs RTAX4000D-CQ352V)
- Military SMD traceability available (vs 5962-0822406QXC)
- Live-at-power-up antifuse configuration (vs SRAM-based commercial FPGAs (e.g., A3PE3000))
Design Notes
RTAX-S/SL devices are one-time programmable (antifuse). Never program flight logic directly onto the RTAX4000SL-CQ352PROTO without completing simulation, static timing closure in Libero SoC, and hardware validation on a reprogrammable adaptor. Microchip's application note 'Prototyping for RTAX-S and RTAX-SL Devices' prescribes a footprint-compatible adaptor board plus EDIF netlist and pinout converter for migration. Burning an error into antifuse silicon is unrecoverable - the die cannot be erased, only replaced.
The ceramic CQFP-352 is a surface-mount package with 352 leads on 0.5 mm-class pitch; use the manufacturer-recommended land pattern and inspect solder joints with X-ray or angled microscopy after reflow, as lead coplanarity on ceramic packages can cause opens. Support the heavy ceramic body during vibration environments with adequate pad size and, for launch applications, consider corner adhesive per program workmanship standards. Verify thermal expansion mismatch between the ceramic package and PCB laminate for wide temperature cycling.
RTAX-S/SL devices use multiple supply rails (core, I/O, auxiliary); per the RTAX-S/SL datasheet, apply the recommended power-up ramp and sequencing so the antifuse device is live-at-power-up reliably. Estimated: decouple each rail with a network of bulk capacitance plus 0.1 uF ceramics at every supply pin group, and measure inrush at turn-on since the CQ352 I/O count drives peak transient current. Confirm exact rail names, voltages, and sequencing order against the current Microchip datasheet before board release.
Compliance Information
Space-grade ceramic CQFP packaging; hermetic ceramic construction. Environmental compliance status not stated in the provided web data - obtain from Microchip product compliance documentation.
