RTAX4000D-CQ352B - 4M-Gate Rad-Tolerant FPGA CQFP-352 | Microchip
MPN: RTAX4000D-CQ352B ✓ Active| Qty | Unit Price | Extended |
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Drop-in alternatives for RTAX4000D-CQ352B — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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RTAX4000D-1CQ352B
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$2600 / Unit
View Datasheet →RTAX4000DL-CQ352B
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View Datasheet →RTAX4000D-CQ352E
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View Datasheet →RTAX4000D-CQ352V
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View Datasheet →RTAX4000SL-CQ352B
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$1 / Unit
View Datasheet →RTAX4000SL-1CQ352B
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View Datasheet →RTAX4000D-CQ352B Maximum Ratings & Electrical Characteristics
| Logic Cells | 55,440 |
| Configurable Logic Blocks (CLBs) | 36,960 |
| Equivalent Gates | 4,000,000 |
| System Gates (cells, per Jotrin listing) | 33,600 |
| Family | RTAX-DSP (RTAX-S/SL/DSP) |
| Process Technology | 0.15 um |
| Core Supply Voltage | 1.5 V (1.425 V to 1.575 V) |
| Technology Type | Antifuse, one-time programmable, radiation-tolerant |
| Package | 352-pin Ceramic CQFP (CQFP-352) |
| Mounting Type | Surface Mount |
| Configuration | Live at power-up, single chip, no external configuration memory |
| Radiation Tolerance | Radiation-tolerant (space-flight qualified family) |
| Application Domain | Space flight systems |
| Programmability | OTP (one-time programmable antifuse) |
RTAX4000D-CQ352B 352-pin ceramic cqfp (cqfp-352) Pin Configuration Guide
Complete pinout information for RTAX4000D-CQ352B (352-pin ceramic cqfp (cqfp-352) 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 RTAX4000D-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
RTAX4000D-CQ352B is suitable for 6 applications: Satellite Payload Data Processing, Spacecraft Bus Control and Telemetry, Onboard Image and Signal Processing, Launch Vehicle Avionics, Radiation-Hardened Instrument Controllers, Secure Military and Aerospace Glue Logic.
Satellite Payload Data Processing
The RTAX4000D-CQ352B fits payload processing because its RTAX-DSP fabric embeds multiply-accumulate blocks on a radiation-tolerant antifuse base, enabling onboard FFTs, FIR filtering, and image compression without external DSP devices. Its 4M-gate / 36,960-CLB capacity hosts the processing pipeline plus bus interface glue in one chip, and its 0.15 um 1.5V CMOS process keeps static power low over multi-year missions. Configured once at the factory, it is live at power-up with no configuration memory to upset, simplifying payload power sequencing. Designers trade longer development cycles (OTP, no reconfiguration) for guaranteed SEU immunity in the configuration fabric.
Recommended
Spacecraft Bus Control and Telemetry
For spacecraft bus controllers, the RTAX4000D-CQ352B implements command decoders, telemetry formatters, memory controllers, and MIL-STD-1553 or SpaceWire interface glue. The live-at-power-up antifuse architecture means the bus controller is functional the instant power is applied - critical for launch vehicles and fail-safe recovery modes. The 1.5V core (1.425V-1.575V) with low static current keeps the power budget predictable, and the hermetic CQFP-352 package withstands thermal cycling. The SL-based RTAX4000SL-CQ352B is often selected for pure bus logic without DSP needs, in the identical footprint, enabling board-level reuse across payload and bus boards.
Recommended
Onboard Image and Signal Processing
Earth-observation and scientific instruments rely on the RTAX4000D-CQ352B to perform real-time image correction, correlation, and spectral processing next to the sensor. The D-variant DSP blocks provide dedicated multiply-accumulate resources that pure SL fabric lacks, achieving deterministic throughput for convolution and FFT kernels, while the 4M-gate capacity holds frame buffers, sequencers, and downlink formatting on the same chip. The 0.99 ns combinatorial CLB delay of the -1 speed grade supports tens-of-MHz processing clocks adequate for many instrument pipelines. Because the antifuse configuration cannot upset, processing integrity is maintained through single-event environments without external watchdog reload.
Recommended
Launch Vehicle Avionics
Launch vehicle avionics demand circuits that are functional at the first microsecond of battery power and immune to vibration, thermal shock, and radiation - all satisfied by the RTAX4000D-CQ352B. Live-at-power-up antifuse configuration eliminates boot delay and configuration-memory upsets, while the hermetic ceramic CQFP package and gull-wing leads support the solder inspection flows mandated in launch electronics. The device implements flight-event sequencing, redundancy voting, and telemetry multiplexing within its 36,960 CLBs. Engineering teams typically verify on PROTO prototype units (same timing in non-hermetic packages) before programming flight units, since the fabric is one-time programmable.
Recommended
Radiation-Hardened Instrument Controllers
Scientific instruments on deep-space probes and Earth-orbiting platforms use the RTAX4000D-CQ352B as the central controller interfacing sensors, actuators, and the spacecraft data bus. Radiation tolerance of the RTAX-DSP fabric mitigates total ionizing dose and single-event effects in the control path, while the 1.5V low-power process limits the instrument's share of the mission power budget. The 4M-gate capacity integrates sensor sequencing, calibration DSP, and fault-management state machines on a single qualified device, reducing part count and board area. Designers must complete full timing closure before programming because no field updates are possible in flight.
Recommended
Secure Military and Aerospace Glue Logic
For defense and aerospace programs, the RTAX4000D-CQ352B consolidates scattered ASIC/PLD glue logic - address decoding, bus bridging, protocol conversion - into a single one-time-programmable, single-chip device with no external configuration bitstream to intercept or corrupt. Its antifuse fabric offers inherent resistance to readback attacks, and live-at-power-up operation suits always-on secure subsystems. The 55,440 logic cells provide headroom for design growth without a PCB respin, and speed-grade variants (-1) let performance be increased on the same footprint. Ground-based rad-test heritage of the RTAX family simplifies qualification documentation for military programs.
Recommended
Recommended Products Summary
Engineering reference data for RTAX4000D-CQ352B — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | RTAX4000D-1CQ352B | RTAX4000DL-CQ352B | RTAX4000SL-CQ352B | RTAX4000SL-1CQ352B |
|---|---|---|---|---|---|
| Package | CQFP-352 (hermetic ceramic) | CQFP-352 - same | CQFP-352 - same | CQFP-352 - same | CQFP-352 - 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 | 55,440 | 55,440 | 55,440 | 55,440 | 55,440 |
| CLBs | 36,960 | 36,960 | 36,960 | 36,960 | 36,960 |
| DSP Fabric | Yes (RTAX-DSP) | Yes (RTAX-DSP) | Yes (RTAX-DSP) | No (RTAX-SL) | No (RTAX-SL) |
| Speed Grade | Standard | -1 (0.99 ns max CLB delay) | Standard (low-power) | Standard | -1 (faster) |
| Core Supply Voltage | 1.5 V (1.425-1.575 V) | 1.5 V (1.425-1.575 V) | 1.5 V | 1.5 V | 1.5 V |
| Process Technology | 0.15 um antifuse | 0.15 um antifuse | 0.15 um antifuse (low-power option) | 0.15 um antifuse | 0.15 um antifuse |
| Radiation Tolerance | Radiation-tolerant, space flight | Radiation-tolerant, space flight | Radiation-tolerant, space flight | Radiation-tolerant, space flight | Radiation-tolerant, space flight |
Key Differentiators
- DSP-enhanced fabric on a radiation-tolerant base (vs RTAX4000SL-CQ352B)
- Standard speed grade at potentially lower cost (vs RTAX4000D-1CQ352B)
- Lower static power for power-critical missions (vs RTAX4000DL-CQ352B)
Design Notes
The RTAX4000D-CQ352B is one-time programmable (antifuse). There is no field reconfiguration after programming, so any HDL defect discovered post-programming scraps the flight unit. Always verify designs on PROTO prototype units - Microchip datasheet notes these have the same timing attributes as RTAX-S/SL and RTAX-DSP flight units but ship in non-hermetic ceramic packages - and complete full static timing analysis in Microchip Designer before releasing programming files. Budget prototype iterations into the program schedule.
The core supply must be held at 1.5 V nominal within 1.425-1.575 V. Use a low-noise point-of-load regulator with adequate decoupling at the CQFP-352 power pins. Per Microchip USA listing, the -1 grade device is specified at 1.5 V nominal with this tolerance band; check I/O bank supply requirements separately in the RTAX-S/SL/DSP datasheet since VCCI can differ from VCC. Estimated: core current scales with toggle rate, so worst-case power analysis should use Libero SmartPower with flight-representative activity files, not just the static datasheet figure.
The 352-pin ceramic CQFP has gull-wing leads on all four sides with 0.5 mm-class pitch - inspectable but fragile. Support the solder-joint inspection flows (X-ray or visual per your build standard) by providing adequate courtyard keepout and lead access in the land pattern. Handle with ESD precautions and avoid lead bending during rework; ceramic packages tolerate thermal cycling well but the leads do not forgive repeated rework. Verify the exact CQFP-352 mechanical drawing dimensions in the Microchip RTAX-S/SL/DSP datasheet before finalizing the footprint.
Compliance Information
Spaceflight hermetic ceramic CQFP packaging; qualification is per space program flows rather than AEC-Q100. RoHS/REACH status not stated in provided data.
