RTAX4000DL-1CQ352B - 4M-Gate Rad-Tolerant FPGA | Microchip
MPN: RTAX4000DL-1CQ352B ✓ Active| Qty | Unit Price | Extended |
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Drop-in alternatives for RTAX4000DL-1CQ352B — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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RTAX4000DL-1CQ352V
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RTAX4000S-1CQ352V
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View Datasheet →RTAX4000SL-CQ352E
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$2620 / Unit
View Datasheet →RTAX4000DL-1CQ352B Maximum Ratings & Electrical Characteristics
| Equivalent Gates | 4,000,000 gates |
| Logic Cells | 55,440 |
| CLB Organization | 36,960 CLBs |
| Inputs | 166 |
| Outputs | 166 |
| Supply Voltage | 1.5 V nominal |
| Operating Temperature | -55C to +125C |
| Technology | CMOS, antifuse, one-time programmable |
| Package | 352-terminal CQFP (S-CQFP ceramic, metal-sealed cofired flatpack) |
| Package Dimensions | 48 mm x 48 mm (square, with guard ring) |
| Family | RTAX-S/SL and RTAX-DSP radiation-tolerant FPGAs |
| Configuration | Live at power up (single-chip, no external configuration device) |
| Radiation Tolerance | Radiation-tolerant (space-flight qualified per Microchip RTAX family) |
| Mounting Type | Surface Mount |
RTAX4000DL-1CQ352B 48 mm x 48 mm (square, with guard ring) Pin Configuration Guide
Complete pinout information for RTAX4000DL-1CQ352B (48 mm x 48 mm (square, with guard ring) 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 RTAX4000DL-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
RTAX4000DL-1CQ352B is suitable for 6 applications: Satellite Payload Data Processing, Spacecraft Bus Control and Command Handling, Onboard Signal Processing (DSP Payloads), Radiation-Exposed Defense and Strategic Systems, Instrumentation and Telemetry Interfaces, Single-Chip Boot-Free Control for Launch Vehicles.
Satellite Payload Data Processing
The RTAX4000DL-1CQ352B fits satellite payload processing because its 4,000,000-gate RTAX-DSP fabric provides 36,960 CLBs and DSP multiply-accumulate resources that absorb framing, FEC, and filtering functions that would otherwise require multiple rad-hard ASICs. Its 166 inputs and 166 outputs support the wide parallel buses of imaging and communications payloads, while the hermetic 48mm x 48mm ceramic CQFP survives launch vibration and vacuum thermal cycling across -55C to +125C. Placed as the payload's main processing FPGA between sensor front ends and downlink formatters, the antifuse, live-at-power-up architecture eliminates SEU-prone configuration memory and external configuration devices, increasing single-chip availability. The trade-off is one-time programmability: the bitstream is frozen at programming, so verify timing closure and I/O banking thoroughly before flight lot programming.
Recommended
Spacecraft Bus Control and Command Handling
For spacecraft bus controllers, the RTAX4000DL-1CQ352B integrates telemetry, telecommand, and mode-control logic in one radiation-tolerant chip. Its 1.5V nominal core supply keeps static power low - critical for eclipse-phase power budgets - while live-at-power-up operation guarantees control logic is active the instant the spacecraft is energized, with no boot delay or configuration scrubber required. The -55C to +125C operating range covers unheated bus avionics compartments, and the 352-terminal S-CQFP with guard ring provides the hermeticity needed for multi-year missions. Designers typically use it for OBC glue logic, MIL-STD-1553/CAN interface bridging, and watchdog functions. Because the device is one-time programmable, command-state machines should be extensively verified in the footprint-compatible adaptor-board prototyping flow before flight devices are programmed.
Recommended
Onboard Signal Processing (DSP Payloads)
The DL suffix marks this device as an RTAX-DSP variant: it pairs the 4M-gate RTAX-S fabric with dedicated DSP multiply-accumulate blocks, enabling onboard implementation of FIR filters, FFTs, correlation, and compression algorithms for SAR radar, hyperspectral imaging, and software-defined radio payloads. With 55,440 logic cells and 166 user inputs and outputs, wide datapaths to ADCs and formatters are supported without pin-multiplexing. The 1.5V CMOS process keeps dynamic power acceptable for sustained DSP workloads in vacuum, where radiative cooling limits dissipation. In the signal chain the device typically sits between the digitizer and the mass-memory or downlink stage. Consider that fixed one-time-programmable silicon requires the algorithm to be locked early in the program; parameterize coefficients and make them register-controlled for post-program flexibility.
Recommended
Radiation-Exposed Defense and Strategic Systems
Beyond civil space, the RTAX4000DL-1CQ352B serves defense programs exposed to radiation environments such as strategic missiles, high-altitude platforms, and nuclear-event-hardened avionics. The antifuse fabric is inherently SEU-immune at the configuration level, and Microchip documents QML class Q and class V qualification flows per Mil Prf 38535 for RTAX family members on the DLA Qualified Manufacturers List, supporting program-level parts assurance. The -55C to +125C ceramic CQFP package withstands severe environmental screening, and the single-chip, live-at-power-up design simplifies fault management compared to SRAM FPGAs that need configuration scrubbing. Use the DLA Cross Reference Guide from Microchip to map this MPN to standard military drawing equivalents for procurement. Note the DL DSP blocks can offload guidance or sensor-fusion computations from the main flight computer.
Recommended
Instrumentation and Telemetry Interfaces
Scientific instruments on research satellites and deep-space probes use the RTAX4000DL-1CQ352B to condition, timestamp, and packetize sensor data into telemetry streams. Its 36,960 CLBs absorb protocol bridging between instrument interfaces (LVDS/parallel sensor buses) and the spacecraft's SpaceWire or custom telemetry backbone, while the 166 I/Os accommodate multi-instrument aggregation. The hermetic ceramic flatpack and wide -55C to +125C range survive cryogenic proximity and unheated mounting conditions. Because RTAX devices draw low static power at a 1.5V core, they suit always-on instrument electronics with strict energy budgets. Antifuse one-time programmability eliminates configuration upsets in high-radiation orbits such as MEO and missions through the South Atlantic Anomaly. Plan the pinout early, since the footprint converter flow locks pin assignments before prototyping completes.
Recommended
Single-Chip Boot-Free Control for Launch Vehicles
Launch-vehicle avionics favor the RTAX4000DL-1CQ352B because live-at-power-up, single-chip operation removes boot time and configuration-storage failure modes during the seconds-long flight window where a configuration reload is impossible. The 4M-gate fabric integrates flight-control glue logic, redundancy voting, and sensor-interface consolidation, replacing racks of rad-hard SSI/MSI devices and reducing board count. Its ceramic 352-terminal CQFP withstands high-shock launch environments, and the -55C to +125C range covers externally mounted stages. The 166 inputs and outputs support triple-modular-redundancy sensor buses feeding the flight computer. Designers should implement TMR and voting structures in the fabric, since while antifuse configuration is upset-immune, user flip-flops still require mitigation for single-event transients per Microchip reliability guidance.
Recommended
Recommended Products Summary
Engineering reference data for RTAX4000DL-1CQ352B — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | RTAX4000DL-1CQ352V | RTAX4000S-1CQ352V | RTAX4000SL-CQ352E |
|---|---|---|---|---|
| Package | 352-terminal CQFP (S-CQFP, 48mm x 48mm) | 352-terminal CQFP - same | 352-terminal CQFP - same | 352-terminal CQFP - same |
| Brand | Microchip Technology (Actel/Microsemi) | Microchip Technology | Microchip Technology | Microchip Technology |
| Equivalent Gates | 4,000,000 | 4,000,000 | 4,000,000 (S fabric) | [DATA_NEEDED] |
| DSP Blocks (DL variant) | Yes (RTAX-DSP) | Yes (RTAX-DSP) | No (RTAX-S fabric) | No (RTAX-SL fabric) |
| User I/O | 166 in / 166 out | 166 in / 166 out | [DATA_NEEDED] | [DATA_NEEDED] |
| Core Supply Voltage | 1.5 V nominal | 1.5 V nominal | 1.5 V nominal | 1.5 V nominal |
| Operating Temperature | -55C to +125C | -55C to +125C | -55C to +125C | -55C to +125C |
| Speed Grade | -1 | -1 | -1 | C (standard speed grade suffix) |
| Configuration Technology | Antifuse, one-time programmable, live at power up | Antifuse OTP - same | Antifuse OTP - same | Antifuse OTP - same |
Key Differentiators
- RTAX-DSP fabric with dedicated DSP multiply-accumulate blocks (vs RTAX4000S-1CQ352V)
- Identical die available in alternate screening suffix (vs RTAX4000DL-1CQ352V)
- Antifuse live-at-power-up architecture (vs RTAX4000SL-CQ352E)
Design Notes
The RTAX4000DL-1CQ352B is one-time programmable: after programming, the logic and pinout are permanent. Freeze the design only after full timing closure in Libero SoC and hardware validation. Microchip documents a prototyping methodology using a footprint-compatible adaptor board plus an EDIF netlist and pinout converter, allowing the design to be validated in reprogrammable silicon while preserving the flight PCB layout. Skipping this step risks scrapping expensive flight devices.
The core runs on a nominal 1.5V supply; follow the per-bank I/O supply requirements in the RTAX-S/SL and RTAX-DSP datasheet (rtaxs_ds2169). Estimated: power dissipation scales with toggle rate and I/O count - with 166 outputs switching, I/O current can dominate core power, so budget supplies per bank and verify sequencing order at power-up to avoid latch-up during hot launch-environment testing.
The 352-terminal ceramic CQFP (48mm x 48mm) requires a matching land pattern with generous via fan-out under the guard ring for ground return. Use the JESD-30 S-CQFP footprint per the datasheet mechanical drawing, provide symmetric thermal relief to handle -55C to +125C cycling, and place 0.1uF decoupling at each supply terminal group. Inspect solder joints with X-ray since the ceramic body hides fillet formation on the perimeter leads.
Compliance Information
Space-grade ceramic hermetic package; RTAX family members are qualified under Mil Prf 38535 flows per Microchip's DLA Cross Reference Guide; exact RoHS/REACH status of this ceramic CQFP variant not stated in provided data.
