RTAX4000SL-1LG1272B - 4M-Gate Rad-Tolerant FPGA | Microchip

Satellite Payload Data Processing

The RTAX4000SL-1LG1272B fits satellite payload processing because it packs 4,000,000 equivalent gates and 60,480 logic cells into a single hermetic 1272-pin ceramic LGA, allowing payload signal chains that once needed multiple devices to be integrated on one chip. Its 0.99 ns maximum combinatorial delay supports high-throughput pipelines for image downlink formatting and compression, while the embedded SRAM with built-in FIFO control logic absorbs burst-rate sensor data. Because the antifuse configuration is live at power-up with no external boot memory, the payload acquires logic function immediately after switch-on, a benefit during safe-mode recovery. In orbit, its 1.5 V core keeps dynamic power low, easing radiator sizing.

Spacecraft Avionics and Telemetry Control

Spacecraft avionics controllers benefit from the RTAX4000SL-1LG1272B's deterministic, single-chip live-at-power-up logic: there is no configuration-load window during which the flight computer would be blind. The device's 40,320 CLBs implement redundant telemetry encoders, command decoders, and watchdog logic, while segmentable clock resources let designers isolate timing domains for redundancy management. Chip-wide highway routing simplifies distribution of global status signals across the die. Operating from a tightly regulated 1.5 V (1.425 V to 1.575 V) core, the FPGA integrates easily with spacecraft point-of-load regulation. Its ceramic LGA packaging suits board-level conformal coating and hermetic enclosure flows standard in avionics assembly.

Deep-Space Instrument Interfaces

Deep-space instruments operate where repair is impossible and radiation doses accumulate over many years, making the RTAX4000SL-1LG1272B's radiation-tolerant antifuse architecture a natural fit. The 0.15 um CMOS process and 1.5 V core limit static leakage and SEU cross-section, while the fixed antifuse interconnect cannot suffer configuration upsets the way SRAM-based FPGAs do. Designers use the 60,480 logic cells to implement instrument sequencers, ADC framing, and science-data packetizers, exploiting dedicated carry logic for on-board numerical processing such as accumulation and filtering. Embedded SRAM FIFOs buffer acquisition bursts between instrument sensors and the spacecraft data bus, decoupling instrument timing from downlink timing.

Launch-Vehicle Flight Control Electronics

Launch-vehicle avionics experience high vibration, wide temperature swings, and brief but intense radiation belts, and the RTAX4000SL-1LG1272B addresses these conditions with a rugged ceramic 1272-pin LGA package and radiation-tolerant silicon. The device's live-at-power-up property guarantees control logic is active the instant power is applied to the flight string - a critical requirement during the powered-flight sequence where there is no time for configuration loading. Its 0.99 ns CLB combinatorial delay permits tightly closed-loop control computations, and four million gates consolidate guidance interface, redundancy voting, and telemetry formatting into a single screened device, reducing board count, mass, and single-point failure interfaces in the control chain.

On-Board Signal Processing Pipelines

For high-rate digital signal processing in space payloads - radar front-end correlation, multispectral image filtering, or CCSDS-compliant encoding - the RTAX4000SL-1LG1272B offers four million gates with dedicated carry logic enabling efficient adder and accumulator chains at device-level timing supported by the 0.99 ns maximum combinatorial delay. Embedded SRAM blocks with built-in FIFO control implement coefficient storage and ping-pong line buffers without external memory, which is valuable because board-level SRAM in space requires additional SEU mitigation. Segmentable clocks allow processing, interface, and housekeeping domains to run at independent frequencies. The 1.5 V core keeps pipeline power within spacecraft thermal budgets even for continuous-duty processing.

Single-Chip System Integration (Board-Area Reduction)

Programs migrating legacy multi-chip spaceflight logic into a single device choose the RTAX4000SL-1LG1272B to reduce board area, mass, and interconnect failure points. At 4,000,000 gates it is the highest-density RTAX-SL family member, consolidating glue logic, bus bridges, memory controllers, and custom interfaces onto one hermetic ceramic LGA. Because configuration is stored in antifuse interconnect, no configuration PROM or flash - each of which is a radiation liability - is needed, delivering a true single-chip form factor as Microchip advertises. The footprint-compatible adaptor board and EDIF netlist/pinout convertor methodology documented by Microchip eases migration from the RTAX4000SL prototyping package to the screened flight part.