RTAX250S-LG624EV - 250K Gate Rad-Tolerant FPGA | Microchip
MPN: RTAX250S-LG624EV ✓ Active| Qty | Unit Price | Extended |
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Drop-in alternatives for RTAX250S-LG624EV — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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RTAX250S-LG624V
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View Datasheet →RTAX250S-LG624B
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View Datasheet →RTAX250S-1LG624V
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View Datasheet →RTAX250SL-LG624V
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View Datasheet →RTAX250SL-LG624E
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View Datasheet →RTAX250SL-1LG624V
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View Datasheet →RTAX250SL-LG624B
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View Datasheet →RTAX250S-CG624E
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View Datasheet →RTAX250S-LG624EV Maximum Ratings & Electrical Characteristics
| Family | RTAX-S Radiation-Tolerant FPGA |
| Equivalent Gate Count | 250,000 gates |
| Logic Cells | 4224 |
| Configurable Logic Blocks (CLBs) | 2816 |
| User I/Os | 248 |
| Core Supply Voltage | 1.5 V nominal |
| Maximum System Frequency | 649 MHz |
| Process Technology | 0.15 um CMOS anti-fuse |
| Programming Technology | Anti-fuse (one-time programmable), live at power-up |
| Package | 624-pin LGA |
| Mounting Type | Surface Mount |
| Operating Temperature | -55C to +125C |
| Radiation Tolerance | Radiation-tolerant (space-flight qualified family) |
| Application Grade | Space / hi-rel |
| Configuration Device Required | No (single-chip, live at power-up) |
RTAX250S-LG624EV 624-pin lga Pin Configuration Guide
Complete pinout information for RTAX250S-LG624EV (624-pin lga 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 RTAX250S-LG624EV.
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
RTAX250S-LG624EV is suitable for 6 applications: Satellite Payload Data Processing, Spacecraft Bus Interface and Bridge Logic, Telemetry, Tracking and Command (TM/TC), Attitude Determination and Control Systems (ADCS), Spaceflight Instrument Sequencing and Timing, Launch Vehicle Avionics Logic.
Satellite Payload Data Processing
The RTAX250S-LG624EV fits payload data-processing chains where radiation tolerance and deterministic single-chip operation dominate. Its 250K gates and 4224 logic cells implement framing, FIFO buffering, and CCSDS-formatting logic, while 248 user I/Os interface payload sensors and downlink modems. Because the anti-fuse fabric is live at power-up, the payload logic is available the instant the spacecraft power bus energizes, with no configuration PROM to fail or suffer configuration SEUs. The 1.5V core keeps static power low, a key budget line on power-constrained small satellites, and the 624-pin LGA provides the I/O density needed for wide parallel payload buses.
Recommended
Spacecraft Bus Interface and Bridge Logic
Spacecraft command and data handling (CDH) systems use the RTAX250S-LG624EV as glue logic between legacy buses such as Mil-Std-1553, CAN, and SpaceWire and modern payload processors. The 649 MHz class architecture easily closes timing for bus codec cores, while the 248 I/Os support multiple concurrent interfaces. The radiation-tolerant anti-fuse fabric avoids the configuration-upset mitigation (triple modular redundancy of configuration memory) that SRAM FPGAs require in orbit, simplifying fault management. With a -55C to +125C EV-grade range, the device tolerates the thermal cycling of eclipse transitions without derating the interface timing.
Recommended
Telemetry, Tracking and Command (TM/TC)
TM/TC modules demand fail-safe, always-available logic: decoders for uplink commands, formatters for housekeeping telemetry, and watchdog functions. The RTAX250S-LG624EV is well suited because its configuration is fixed at programming time, so a radiation-induced configuration upset cannot disable the command decoder - a decisive safety property versus SRAM-based FPGAs. The device's live-at-power-up behavior guarantees the receiver chain is decoding commands the moment power is applied, and its 2816 CLBs provide ample capacity for convolutional or Reed-Solomon-adjacent framing support functions in the 624-pin LGA footprint.
Recommended
Attitude Determination and Control Systems (ADCS)
ADCS electronics interface star trackers, sun sensors, gyroscopes, and reaction-wheel drivers - a mix of parallel, serial, and PWM signals that the RTAX250S-LG624EV handles with its 248 user I/Os and flexible I/O standards. The 250K-gate capacity hosts sensor-fusion preprocessing and the wheel-driver PWM generators, while deterministic anti-fuse routing ensures consistent control-loop latency, important for stable pointing budgets. Its low 1.5V core supply and low static power fit the continuous-duty profile of ADCS electronics, and the -55C to +125C range covers the thermal environment of external equipment panels.
Recommended
Spaceflight Instrument Sequencing and Timing
Scientific instruments on orbital platforms require precision sequencers that trigger detectors and digitizers with sub-microsecond determinism. The RTAX250S-LG624EV implements these sequencers in its 649 MHz-class fabric, with on-chip memory blocks buffering readout streams. Because the design is hardened into anti-fuse interconnect at programming time, the timing is fixed and repeatable across the mission - no reconfiguration jitter or boot-time gaps between observation windows. The EV temperature grade supports instruments exposed to -55C to +125C, and the single-chip 624-pin LGA saves board area inside tight instrument housings.
Recommended
Launch Vehicle Avionics Logic
Launch vehicles impose extreme vibration, wide temperature, and short mission durations where configuration reliability is paramount. The RTAX250S-LG624EV's anti-fuse fabric withstands vibration mechanically (no soldered configuration PROM to shed) and logically (no configuration upsets), making it a common choice for flight-event sequencers, redundant-voting logic, and range-safety interface bridges. The 248 I/Os terminate discrete and MIL-STD interfaces, and live-at-power-up operation ensures the flight computer's peripheral logic is active from umbilical power application through stage separation, with -55C to +125C operation across the flight thermal profile.
Recommended
Recommended Products Summary
Engineering reference data for RTAX250S-LG624EV — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | RTAX250S-LG624V | RTAX250S-LG624B | RTAX250S-1LG624V | RTAX250SL-LG624V | RTAX250S-CG624E |
|---|---|---|---|---|---|---|
| Package | 624-pin LGA | 624-pin LGA - same | 624-pin LGA - same | 624-pin LGA - same | 624-pin LGA - same | 624-pin ceramic package - same position map |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Equivalent Gates | 250,000 | 250,000 | 250,000 | 250,000 | 250,000 | 250,000 |
| Logic Cells / CLBs | 4224 / 2816 | 4224 / 2816 | 4224 / 2816 | 4224 / 2816 | 4224 / 2816 | 4224 / 2816 |
| Speed Grade | Standard | Standard | Standard | -1 (faster) | Standard (SL process) | Standard |
| Core Supply Voltage | 1.5 V | 1.5 V | 1.5 V | 1.5 V | 1.5 V | 1.5 V |
| Operating Temperature | -55C to +125C | [DATA_NEEDED] | [DATA_NEEDED] | -55C to +125C | [DATA_NEEDED] | [DATA_NEEDED] |
| Static Power Profile | Standard RTAX-S | Standard RTAX-S | Standard RTAX-S | Standard RTAX-S | Lower static power (SL) | Standard RTAX-S |
Key Differentiators
- True single-chip, live-at-power-up operation (vs RTAX250SL-LG624V)
- Faster timing margin available on identical footprint (vs RTAX250S-1LG624V)
- Lower static power option on same die (vs RTAX250SL-LG624V)
- Trade-off: ceramic package variant needs land-pattern review (vs RTAX250S-CG624E)
Design Notes
RTAX-S devices are one-time programmable. Never submit a design to the programming center without exhaustive simulation, static timing analysis in Microchip Libero, and a formal design review. The manufacturer-recommended methodology is prototyping on the Aldec flash-based RTAX adaptor (ProASIC3E technology) using the footprint-compatible adaptor board with an EDIF netlist and pinout converter described in the Microchip application note 'Prototyping for RTAX-S and RTAX-SL Devices'. Any post-programming change requires a new device - budget spare units accordingly.
Provide a clean 1.5V core rail with decoupling per the Microchip RTAX-S power guidelines: bulk capacitance at the regulator and distributed 0.1 uF ceramics at the LGA power pins. If power budget is tight, consider the RTAX250SL variants, which use a low-power process option to cut static current on the same footprint. I/O bank voltages must match the connected bus standards; verify bank assignment in the Libero pin editor before PCB routing because the OTP device cannot tolerate pin swaps after layout freeze.
The 624-pin LGA requires a precision land pattern per the Microchip RTAX-S datasheet package section, with matched pad geometry to ensure coplanarity across the large body. Use a defined reflow profile with x-ray inspection capability for flight hardware, and avoid hand rework of LGA devices. Dedicate escape vias per signal pad where fanout is dense; the 248 user I/Os frequently require high-layer-count boards. Do not route noisy switching-regulator nodes under the package.
For high-rate interfaces approaching the 649 MHz-class fabric performance, use the '-1' speed grade part (e.g., RTAX250S-1LG624V) to secure timing margin, and control trace impedance per the bus standard requirements. Series-terminate single-ended outputs to contain overshoot on long backplane runs, and keep clock pairs short and referenced to a solid ground plane. Confirm final timing with Libero static timing analysis at the -55C to +125C corner, not just room temperature.
Compliance Information
Space-grade hi-rel device; compliance declarations are program-specific and must be obtained from Microchip with the certificate of conformance. Not an automotive AEC-Q100 product.
