RTAX250SL-LG624E - 250K Gate Rad-Tolerant FPGA | Actel/Microchip
MPN: RTAX250SL-LG624E ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1500 | $1,500.00 |
| 10 | $1350 | $13,500.00 |
| 25 | $1200 | $30,000.00 |
| 50 | $1100 | $55,000.00 |
| 100 | $1000 | $100,000.00 |
Drop-in alternatives for RTAX250SL-LG624E — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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RTAX250SL-LG624V
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View Datasheet →RTAX250S-CG624E
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View Datasheet →RTAX250S-1LG624V
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View Datasheet →RTAX250SL-LG624E Maximum Ratings & Electrical Characteristics
| Manufacturer | Actel (Microsemi / Microchip Technology) |
| Family | RTAX-SL Radiation-Tolerant FPGA |
| Equivalent System Gates | 250000 gates |
| Logic Cells (CLBs) | 2816 cells |
| Maximum System Frequency | 649 MHz |
| Process Technology | 0.15 um CMOS |
| Core Supply Voltage | 1.5 V |
| Package | 624-Pin LGA (LG624) |
| Mounting Type | Surface Mount |
| Embedded Memory | Embedded SRAM with built-in FIFO control logic |
| Radiation Tolerance | Radiation-tolerant, space-flight qualified family |
| Live at Power-Up | Yes |
| Clock Architecture | Segmentable clocks, chip-wide highway routing |
| Arithmetic Support | Dedicated carry logic |
| Speed Grade | Standard (-) per RTAX-S/SL speed grade system |
RTAX250SL-LG624E 624-pin lga (lg624) Pin Configuration Guide
Complete pinout information for RTAX250SL-LG624E (624-pin lga (lg624) 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 RTAX250SL-LG624E.
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
RTAX250SL-LG624E is suitable for 6 applications: Satellite Payload Data Processing, Spacecraft Avionics and Telemetry, Sensor and Imaging Data Acquisition, Onboard Command and Sequencing, Communication Payload Signal Chains, Prototype and Flight Development.
Satellite Payload Data Processing
The RTAX250SL-LG624E's 250K equivalent gates and 649 MHz-rated fabric make it well suited to onboard payload processing, where sensor streams must be framed, compressed, or filtered before downlink. Embedded SRAM with built-in FIFO control logic buffers data between acquisition interfaces and processing pipelines without external memory, preserving the single-chip form factor that space designers value. Placed between an imaging or science payload and the telemetry formatter, the FPGA absorbs burst data into FIFOs and streams it through pipeline stages clocked from the segmentable clock network. The radiation-tolerant 0.15 um CMOS fabric maintains configuration integrity across the mission environment, and low static power conserves the limited power budget of small satellites and deep-space probes.
Recommended
Spacecraft Avionics and Telemetry
Spacecraft avionics requires logic that is operational the instant power is applied; the RTAX250SL-LG624E delivers live-at-power-up operation, eliminating the configuration window during which SRAM FPGAs are blank or vulnerable. With 2816 logic cells and chip-wide highway routing, it implements housekeeping controllers, watchdog logic, and telemetry encoders that interface with the onboard data bus. The 624-pin LG624 package supplies ample I/O for parallel command/telemetry buses and discrete interfaces, while the 1.5V core keeps overall power draw compatible with battery-backed eclipse operation. Because the device is part of a flight-qualified family with established heritage in RTAX-S designs, avionics teams can reuse verified IP and migration flows, reducing qualification risk on new spacecraft programs.
Recommended
Sensor and Imaging Data Acquisition
Image sensors and scientific instruments on orbiting platforms generate wide, high-rate data streams that must be captured deterministically. The RTAX250SL-LG624E provides dedicated carry logic for fast arithmetic, supporting on-the-fly accumulation, correlated double sampling helpers, and histogram logic, while the 649 MHz fabric rating gives ample timing margin at practical pixel clocks. Its embedded SRAM blocks with FIFO control act as elastic buffers between the sensor's burst readout and downstream framing logic, absorbing rate mismatch without external FIFO chips. The LG624 package's high pin count accommodates parallel LVDS-style and single-ended sensor interfaces available to the RTAX-SL I/O structure, and low power dissipation minimizes thermal load near thermally sensitive detectors.
Recommended
Onboard Command and Sequencing
Launch vehicles and satellites rely on hard real-time sequencers that must never miss a time-tagged command. The RTAX250SL-LG624E's antifuse-based configuration is fixed at power-up, so sequencer state machines start deterministically with no loader dependency - a key reliability property versus SRAM FPGAs that must be configured from external memory. With 250K gates there is headroom for redundant command decoders, majority-voted state machines, and time-tag queues implemented in embedded FIFO/SRAM. Segmentable clocks allow independent timing domains for the timekeeping core and the switching output stages. The 624-pin LG624 footprint supports wide discrete output banks for pyrotechnic-arm/fire interface logic, all within the low-power envelope demanded by long-duration missions.
Recommended
Communication Payload Signal Chains
Transponder and modulator chains on communications satellites need deterministic glue logic and channelization functions with predictable timing. The RTAX250SL-LG624E's 0.15 um fabric with 649 MHz cell rating supports framing, scrambling, and forward-error-correction pre-processing at typical satellite symbol rates while dissipating minimal static power. Embedded SRAM FIFOs decouple the continuous baseband stream from packetized routing toward modulators, and chip-wide highway routing provides low-skew distribution of reference clocks to all channel logic. The radiation-tolerant architecture ensures the configuration fabric withstands total ionizing dose over a 15-year GEO mission. Designers using the Axcelerator-derived fabric can prototype on commercial AX devices with the footprint-compatible adaptor methodology before committing to flight silicon.
Recommended
Prototype and Flight Development
Microchip's documented methodology for RTAX-S/SL development uses footprint-compatible adaptor boards with an EDIF netlist and pinout converter, allowing teams to prototype logic on commercial Axcelerator silicon and migrate to RTAX-SL flight devices without redesign. The RTAX250SL-LG624E fits this flow as the flight target for LG624-based boards. During development, timing constraints and floorplans created on the commercial equivalent carry over through the conversion flow, preserving pin assignments and I/O standards. XAIPART's site lists several PROTO devices in the RTAX family (such as RTAX2000SL-1CG624PROTO and RTAX250SL-1CQ208PROTO) that serve as low-cost engineering vehicles, keeping the flight-lot RTAX250SL reserved for qualification and flight units only.
Recommended
Recommended Products Summary
Engineering reference data for RTAX250SL-LG624E — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | RTAX250SL-LG624V | RTAX250SL-1CG624E | RTAX250S-LG624B |
|---|---|---|---|---|
| Package | 624-Pin LGA (LG624) | 624-Pin LGA (LG624) - same | 624-Pin CGA (CG624) - same pin count | 624-Pin LGA (LG624) - same |
| Brand | Actel (Microsemi / Microchip) | Actel (Microsemi / Microchip) | Actel (Microsemi / Microchip) | Actel (Microsemi / Microchip) |
| Equivalent System Gates | 250000 gates | 250000 gates | 250000 gates | 250000 gates |
| Logic Cells | 2816 cells | 2816 cells | 2816 cells | 2816 cells |
| Speed Grade | Standard | Standard | -1 (faster) | Standard |
| Core Supply Voltage | 1.5 V | 1.5 V | 1.5 V | 1.5 V |
| Process Technology | 0.15 um CMOS | 0.15 um CMOS | 0.15 um CMOS | 0.15 um CMOS |
| Radiation Tolerance | Radiation-tolerant (space-flight) | Radiation-tolerant (space-flight) | Radiation-tolerant (space-flight) | Radiation-tolerant (space-flight) |
| Screening Flow | E suffix (per ordering code) | V suffix | E suffix | B suffix |
Key Differentiators
- Low-power SL fabric at identical density (vs RTAX250S-LG624B)
- Faster speed grade availability in same footprint (vs RTAX250SL-LG624V)
- Standard screening for flight acceptance (vs RTAX250SL-LG624B)
Design Notes
Design the power tree around the 1.5V core rail per the RTAX-S/SL datasheet power supply tables, and size the core regulator using static plus dynamic estimates from Microchip's power calculation tools for the Axcelerator-derived fabric. The SL variant offers lower static power than the RTAX-S, which matters for eclipse-mode battery operation. Verify I/O bank voltages against the chosen I/O standards in the LG624 package, since mixed-standard designs require multiple VCCI rails. Estimate all power figures early and re-verify after place-and-route.
Prototype on commercial Axcelerator silicon using Microchip's footprint-compatible adaptor board methodology with the EDIF netlist and pinout converter, as described in the application note Prototyping for RTAX-S and RTAX-SL Devices. This preserves pin assignments and I/O standards when migrating to the flight RTAX250SL-LG624E, so PCB artwork does not change between prototype and flight. Keep the LG624 land pattern per the datasheet mechanical drawing and confirm substrate termination compatibility for the land grid array before release.
Do not substitute commercial FPGAs for this part in flight designs - the RTAX-SL radiation-tolerant fabric and screening flow are program requirements, and equivalents from other vendors are not pin-compatible. When choosing among LG624/CG624 variants, confirm the required speed grade (-1 vs standard) before timing closure, because a standard-grade part may fail constraints designed against a -1 device. Finally, order flight lots with the correct screening suffix (E, V, or B) matching your mission assurance specification to avoid acceptance failures at incoming inspection.
Compliance Information
Space-grade ceramic/LGA packaged devices may be exempt from certain RoHS/REACH requirements; verify compliance certificates with Microchip for the specific screening flow. No compliance data was present in the provided web data.
