RTAX4000D-1CQ352V - 4M-Gate Rad-Tolerant FPGA | Microchip
MPN: RTAX4000D-1CQ352V ✓ Active| Qty | Unit Price | Extended |
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| 10 | $0 | $0.00 |
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| 500 | $0 | $0.00 |
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Drop-in alternatives for RTAX4000D-1CQ352V — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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RTAX4000DL-1CQ352V
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View Datasheet →RTAX4000D-CQ352V
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View Datasheet →RTAX4000SL-1CQ352V
✅ Drop-In📋 Reference alternative (not in catalog)
RTAX4000DL-1CQ352E
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$3300 / Unit
View Datasheet →RTAX4000D-CQ352E
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View Datasheet →RTAX4000SL-CQ352EV
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$10250 / Unit
View Datasheet →RTAX4000D-1CQ352V Maximum Ratings & Electrical Characteristics
| Logic Cells | 55,440 |
| CLB Organization | 36,960 CLBs |
| Equivalent System Gates | 4,000,000 |
| Family | RTAX-S/SL and RTAX-DSP (radiation-tolerant FPGA) |
| Technology | CMOS, anti-fuse, one-time programmable |
| Embedded Memory | Embedded SRAM with built-in FIFO control logic |
| Clock Resources | Segmentable clocks, chip-wide highway routing |
| Arithmetic Resources | Dedicated carry logic (DSP-enriched D variant) |
| Radiation Tolerance | Radiation-tolerant, designed for space-flight systems |
| Configuration | Single-chip, live-at-power-up |
| Package | CQ352 (ceramic column quad flat, 352 pins) |
| Mounting Type | Surface Mount |
| Screening Grade | V (flight screening per ordering code) |
RTAX4000D-1CQ352V cq352 (ceramic column quad flat, 352 pins) Pin Configuration Guide
Complete pinout information for RTAX4000D-1CQ352V (cq352 (ceramic column quad flat, 352 pins) 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-1CQ352V.
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-1CQ352V is suitable for 6 applications: Satellite Payload Data Processing, On-Board Image Compression, Spacecraft Telemetry and Command, Instrument Control and Sequencing, On-Board Communications and Waveform Processing, Fault-Tolerant Avionics and Voting Logic.
Satellite Payload Data Processing
The RTAX4000D-1CQ352V fits satellite payload data paths where its 4,000,000 equivalent gates, 55,440 logic cells, and 36,960 CLBs absorb framing, packetization, and channel coding for high-rate instruments. Microchip positions the RTAX-DSP family for space-flight systems with low-power consumption and live-at-power-up operation, so the FPGA is processing data immediately after switch-on without a configuration loader. The anti-fuse fabric eliminates configuration upset risk in orbit, and embedded SRAM with built-in FIFO control implements elastic buffers between instrument interfaces and downlink formatters. Placed between the payload sensor chain and the telemetry encoder, it sustains deterministic throughput while dissipating less power than SRAM-based alternatives, a direct benefit for constrained spacecraft power budgets.
Recommended
On-Board Image Compression
Earth-observation satellites compress imagery before downlink, and the RTAX4000D-1CQ352V provides the DSP-enriched fabric - carry logic plus 4 million system gates - needed for JPEG-like transforms, CCSDS image compression engines, and rate controllers. The 'D' variant of the RTAX family specifically adds arithmetic resources for multiply-accumulate structures, letting engineers implement 2D DCT or wavelet pipelines at flight-representative clock rates. Embedded SRAM blocks with FIFO control store line buffers between pipeline stages, while chip-wide highway routing distributes the pixel clock with low skew. Because the anti-fuse configuration is immune to single-event upsets, the compression engine never loses its bitstream during a mission, and the true single-chip form factor saves board area in tightly packed avionics bays.
Recommended
Spacecraft Telemetry and Command
Spacecraft command and telemetry handling demands deterministic, upset-immune logic that is alive at power-up, which is exactly the profile of the RTAX4000D-1CQ352V. Microchip's datasheet highlights live-at-power-up operation and a true single-chip form factor, so the telemetry formatter begins relaying housekeeping data during the critical launch and early-orbit phase without waiting for configuration. Its segmentable clocks allow independent clock domains for the command decoder, telemetry encoder, and time-tag generation, and the 352-pin CQ ceramic package offers enough I/O for redundant MIL-STD-style bus and UART interfaces. The hermetic ceramic column package supports vacuum operation and board-level solder inspection, while V screening provides the flight-grade lot traceability required by prime contractor quality flows.
Recommended
Instrument Control and Sequencing
Science instruments such as spectrometers and star trackers need precise timing sequencers, gain control, and safety interlocks. The RTAX4000D-1CQ352V implements these controllers with 55,440 logic cells of register-rich fabric, and its embedded SRAM with FIFO control stores sequencer microcode and calibration tables that must survive the radiation environment. Because the anti-fuse fabric is one-time-programmable, the safety-critical interlock logic cannot be corrupted by configuration upsets - a property Microchip cites as the reason RTAX-S is the FPGA of choice for space designs. Dedicated carry logic supports fast checksum and CRC computation on science data, and the segmentable clock network drives staggered readout timing across multi-channel detectors with sub-nanosecond skew control.
Recommended
On-Board Communications and Waveform Processing
Software-defined radios and modem payloads on spacecraft benefit from the RTAX4000D-1CQ352V's DSP-oriented fabric: filters, interpolators, and correlation engines map efficiently onto the carry-logic arithmetic of the D variant at up to 4 million gates. Embedded SRAM blocks with built-in FIFO control buffer sample streams between the ADC front end and the modulator, while chip-wide highway routing distributes the sample clock. The radiation-tolerant anti-fuse configuration means the waveform definition is fixed and immune to SEU-induced reconfiguration loss - a decisive advantage over SRAM FPGAs that would otherwise need scrubbing hardware. Low-power consumption, explicitly listed by Microchip as a family advantage, extends transmitter amplifier thermal margins on power-limited buses.
Recommended
Fault-Tolerant Avionics and Voting Logic
Triple-modular-redundant avionics require a fabric whose configuration cannot silently change, making the anti-fuse RTAX4000D-1CQ352V well suited as the voting and arbitration element of redundant spacecraft control chains. With 36,960 CLBs, engineers can implement triplicated register files, majority voters, and watchdog comparators, while embedded SRAM with FIFO control buffers cross-strapping data between redundant processors. The live-at-power-up property guarantees the voter is operational during brown-out and reset events, and the CQ352 hermetic ceramic package meets the assembly and screening expectations of flight avionics programs. Segmentable clocks allow separate, independently gated timing domains per redundancy lane, easing FMEA analysis and isolation verification.
Recommended
Recommended Products Summary
Engineering reference data for RTAX4000D-1CQ352V — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | RTAX4000DL-1CQ352V | RTAX4000D-CQ352V | RTAX4000SL-1CQ352V | RTAX4000DL-1CQ352E | RTAX4000SL-CQ352EV |
|---|---|---|---|---|---|---|
| Package | CQ352 (ceramic column, 352 pins) | CQ352 - same | CQ352 - same | CQ352 - same | CQ352 - same | CQ352 - same |
| Brand | Microchip Technology (Actel/Microsemi) | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Logic Cells | 55,440 | 55,440 | 55,440 | 55,440 | 55,440 | 55,440 |
| Equivalent System Gates | 4,000,000 | 4,000,000 | 4,000,000 | 4,000,000 | 4,000,000 | 4,000,000 |
| Fabric Variant | RTAX-DSP (D) | RTAX-DSP (DL) | RTAX-DSP (D) | RTAX-SL (no DSP enrichment) | RTAX-DSP (DL) | RTAX-SL (no DSP enrichment) |
| Screening Grade | V (flight screening) | V (flight screening) | V (flight screening) | V (flight screening) | E | EV |
| Architecture | CMOS anti-fuse, OTP, live-at-power-up | CMOS anti-fuse, OTP, live-at-power-up | CMOS anti-fuse, OTP, live-at-power-up | CMOS anti-fuse, OTP, live-at-power-up | CMOS anti-fuse, OTP, live-at-power-up | CMOS anti-fuse, OTP, live-at-power-up |
| Embedded SRAM / FIFO | Yes, with built-in FIFO control | Yes | Yes | Yes | Yes | Yes |
| Unit Price (qty 1) | Quote-based (as of 2026-09-02) | Quote-based | Quote-based | Quote-based | Quote-based | Quote-based |
Key Differentiators
- DSP-enriched fabric for space signal processing (vs RTAX4000SL-1CQ352V)
- Flight V screening with same logic capacity (vs RTAX4000DL-1CQ352E)
- Anti-fuse configuration immunity vs SRAM space FPGAs (vs Xilinx Virtex-QV class SRAM FPGAs (not drop-in))
Design Notes
The RTAX4000D-1CQ352V is a one-time-programmable anti-fuse FPGA: once programmed, it can never be reconfigured. Use PROTO prototype units - per Microchip, PROTO devices have the same timing attributes as flight units and come in non-hermetic ceramic packages - to validate the complete design, then freeze the netlist and programming file under configuration management before blowing any flight-unit fuses. Attempting design changes after flight-unit programming destroys the device. This is the single most costly error in RTAX programs.
The CQ352 ceramic column package uses columns rather than gull-wing leads, so land-pattern design and reflow/refit assembly must follow the Microchip recommended land pattern for CQ packages in the RTAX-S/SL and RTAX-DSP datasheet. Inspect column solder joints with X-ray or angular optical methods, as hidden fillets are common. Allow clearance around the 352-pin footprint for decoupling; consult the datasheet package drawing for exact body dimensions and column pitch rather than scaling from other CQ sizes.
RTAX-DSP devices are noted by Microchip for low-power consumption, a family advantage over SRAM-based space FPGAs, but verify actual core and I/O current for your specific utilization and toggle rates using the Microchip power estimation tools and the datasheet electrical tables. Provide independent decoupling per power rail at the CQ352 package and follow the datasheet power-up sequencing requirements to guarantee the documented live-at-power-up behavior during spacecraft power transitions.
Compliance Information
Space-grade hermetic ceramic packaged device; automotive AEC-Q100 qualification is not applicable. RoHS/REACH status must be confirmed with Microchip for the specific screening lot.
