RTAX250SL-CG624B - 250K Rad-Tolerant FPGA 624-CCGA | Microchip
MPN： RTAX250SL-CG624B ✓ 啟用中RTAX250SL-CG624B 概覽
A radiation-tolerant FPGA is a field-programmable gate array engineered to survive and operate reliably in the space radiation environment, where energetic particles cause single-event effects (SEEs) and total ionizing dose (TID) degradation. Within the space electronics hierarchy, the RTAX-SL family sits alongside other radiation-hardened/tolerant programmable logic solutions and is based on the commercial Axcelerator architecture from Microsemi (now Microchip Technology).
Key features include true single-chip operation (no external configuration PROM required at power-up thanks to antifuse technology), live-at-power-up behavior, embedded SRAM blocks with built-in FIFO control logic, segmentable clock resources, chip-wide highway routing, and dedicated carry logic for arithmetic. The antifuse interconnect is inherently immune to configuration upsets, a decisive advantage over SRAM-based FPGAs in orbit.
Architecturally, the RTAX-SL is derived from the Axcelerator family, with 0.15 um antifuse technology providing low static power and configuration immutability. The device achieves a maximum combinatorial CLB delay of 0.930 ns, enabling pipelined DSP and telemetry processing at up to 649 MHz.
Typical applications include satellite on-board data handling, spacecraft command and telemetry, payload signal processing, and radiation-exposed avionics where configuration-upset immunity is mandatory.
Design consideration: the CCGA624 package requires controlled-impedance, column-grid-array-capable PCB assembly and X-ray inspection; plan board layout early.
This page synthesizes distributor inventory data, drop-in family alternatives, and practical design guidance not found in the manufacturer datasheet alone.
直接替換替代品，適用於 RTAX250SL-CG624B — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： RTAX250SL-CG624B （相同外形與佔位） — 差異在於 Radiation Tolerance, Configuration, Package, Family, Embedded Memory.
RTAX250SL-1CG624B
✅ 直接替換聯絡詢價
查看資料表 →RTAX250SL-CGS624B
✅ 直接替換📋 參考替代品（不在目錄中）
RTAX250SL-1CGS624B
✅ 直接替換📋 參考替代品（不在目錄中）
RTAX250S-CG624B
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →RTAX250SL-LG624B
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →RTAX250SL-CG624B 最大額定值與電氣特性
| Family | RTAX-SL (Radiation-Tolerant FPGA) |
| Equivalent System Gates | 250000 gates |
| Logic Cells / CLBs | 2816 cells |
| 最大時脈頻率 | 649 MHz |
| Combinatorial Delay (CLB) | 0.930 ns max |
| Process Technology | 0.15 um antifuse |
| Core Supply Voltage | 1.5 V |
| 封裝 | 624-ball CCGA (CG624) |
| 安裝類型 | Surface Mount |
| Configuration Technology | Antifuse (single-chip, live at power-up) |
| Embedded Memory | Embedded SRAM with FIFO control logic |
| Radiation Tolerance | Radiation-tolerant (space-flight grade) |
| Programmability Type | Field Programmable Gate Array (one-time programmable) |
RTAX250SL-CG624B 624-ball ccga (cg624) 腳位配置指南
RTAX250SL-CG624B（624-ball ccga (cg624) 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： RTAX250SL-CG624B.
請參閱 資料表 以查看完整腳位配置。
典型應用
RTAX250SL-CG624B 適用於 6 應用s: Satellite On-Board Data Handling, Payload Signal Processing, Command and Telemetry Systems, Radiation-Exposed Avionics, Space Bus Interface and Glue Logic, Earth Observation Instrument Control.
Satellite On-Board Data Handling
The RTAX250SL-CG624B fits spacecraft on-board computer and data-handling units because its antifuse configuration is immune to single-event configuration upsets, eliminating the scrubbing hardware an SRAM FPGA would require. With 250,000 gates and 2816 CLBs organized through chip-wide highway routing, the device implements command decoders, telemetry formatters, and bus interfaces (e.g., MIL-STD-1553, SpaceWire glue logic) in one 1.5 V core device. Live-at-power-up behavior means the OBC logic is functional the instant spacecraft power is applied, supporting autonomous FDIR recovery flows. The embedded SRAM with FIFO control logic buffers housekeeping data streams, while the 649 MHz family timing ceiling leaves ample margin for conventional bus-rate interfaces. Designers should budget the 0.930 ns maximum CLB combinatorial delay when closing timing on high-rate paths and reserve the segmentable clock resources to isolate payload clocking from the data-handling domain.
推薦
Payload Signal Processing
In instrument and communications payloads, the RTAX250SL-CG624B implements front-end DSP functions such as decimation filters, FFT pre-processing, framing, and packetization. Dedicated carry logic accelerates adder/accumulator chains, and the 0.15 um process timing (0.930 ns CLB combinatorial delay) supports pipelined arithmetic at high throughput, with a family maximum clock of 649 MHz for the fastest paths. The antifuse fabric contributes no configuration-upset failure mode, a significant advantage for payloads that cannot tolerate controller resets during science acquisition. Embedded SRAM blocks with built-in FIFO control serve as ping-pong buffers between acquisition and downlink chains without external memory. Because the device is one-time programmable, freeze the netlist early and use footprint-compatible prototyping per Microchip's RTAX prototyping application note before committing flight devices. Thermally, space-flight conduction-cooled assemblies should verify power against mission worst-case clock activity rather than family headline numbers.
推薦
Command and Telemetry Systems
Spacecraft command and telemetry units benefit from the RTAX250SL-CG624B's deterministic, fixed netlist: once programmed, routing and timing are identical on every flight unit, simplifying verification for mission assurance. The 250K-gate capacity covers frame synchronizers, CRC/hash engines, decoders for uplink command formats, and time-tag distribution logic, while segmentable clocks let designers quarantine the time-critical timing chain from noisier data paths. The 1.5 V core and 0.15 um antifuse process keep static power low - important for telemetry units that remain powered through eclipse and safe-mode. Live-at-power-up operation guarantees the telemetry path is observable during the first milliseconds after switch-on, aiding launch and early-orbit operations. Implement input protection and voting (TMR at the RTL level) for single-event-effect-sensitive registers per the Microchip RTAX-S/SL design guidance, since antifuse immunity covers configuration, not user flip-flops.
推薦
Radiation-Exposed Avionics
Launch vehicles, reentry systems, and high-altitude platforms encounter radiation environments where commercial FPGAs upset frequently. The RTAX250SL-CG624B addresses these avionics needs with a radiation-tolerant 0.15 um antifuse fabric that cannot lose its configuration, plus 2816 CLBs of user logic for flight-control glue, sensor interface conditioning, and redundancy management. The 624-ball CCGA package's solder columns provide mechanical compliance for vibration and thermal-cycling environments typical of flight hardware, and ceramic packaging supports the outgassing and workmanship expectations of space avionics programs. Because the device is live at power-up, flight-critical safety functions are available immediately without configuration load delay - a requirement in many ascent-phase architectures. Designers should pair the FPGA with watchdog supervision at system level and apply Microchip's SEE mitigation application notes for user-logic hardening, as antifuse protection applies to the configuration layer only.
推薦
Space Bus Interface and Glue Logic
Modern spacecraft integrate mixed-vintage subsystems; the RTAX250SL-CG624B serves as the protocol-bridging fabric between legacy MIL-STD-1553, CAN, UART, and custom serial links and newer payload digital interfaces. With 250,000 gates and chip-wide highway routing, multiple independent bridges fit in a single device, reducing part count on radiation-exposed boards - each removed commercial component is one less SEE risk. The 649 MHz family clock ceiling and 0.930 ns CLB delay easily cover all conventional spacecraft bus rates, so timing closure is dominated by I/O constraints rather than internal logic depth. Embedded SRAM/FIFO blocks provide rate-buffering between asynchronous clock domains without external memories. The 624-ball CCGA footprint provides generous I/O for multi-bus systems. Fix the netlist under formal configuration control so each bridge's timing remains constant across flight lots, and validate I/O standards and drive strength in Microchip Libero constraints before board release.
推薦
Earth Observation Instrument Control
Cameras, spectrometers, and scatterometers on Earth-observation satellites need deterministic sequencing, detector-clock generation, and high-rate data formatting - workloads well matched to the RTAX250SL-CG624B's 250K gates, 2816 CLBs, and embedded SRAM FIFOs. The antifuse fabric guarantees the instrument control sequence cannot be corrupted in orbit, protecting irreplaceable acquisition opportunities during imaging passes. The 1.5 V core reduces the FPGA's share of instrument power budgets, and live-at-power-up operation simplifies the instrument's turn-on sequencing. Segmentable clocks let detector clocking, control, and downlink domains run from isolated timing trees. Implement detector bias sequencing and safety interlocks in the FPGA with TMR on safety-critical flags, per Microchip RTAX-S/SL reliability guidance, since user registers - not the antifuse configuration - are the SEE-sensitive elements. Plan the CCGA624 land pattern and X-ray inspection criteria early, as ceramic column arrays dominate the assembly cost of the controller board.
推薦
推薦產品摘要
工程參考資料，適用於 RTAX250SL-CG624B — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | RTAX250SL-1CG624B | RTAX250SL-CGS624B | RTAX250SL-1CGS624B | RTAX250S-CG624B | RTAX250SL-LG624B |
|---|---|---|---|---|---|---|
| Package | CCGA-624 (CG624) | CCGA-624 - same | CCGA-624 - same | CCGA-624 - same | CCGA-624 - same | 624-position ceramic - same |
| Brand | Microchip Technology (Actel/Microsemi) | Microchip Technology | Microsemi (Microchip) | Microsemi (Microchip) | Microchip Technology | Microchip Technology |
| Equivalent System Gates | 250,000 | 250,000 | 250,000 | 250,000 | 250,000 | 250,000 |
| Logic Cells / CLBs | 2816 | 2816 | 2816 | 2816 | 2816 | 2816 |
| Maximum Clock Frequency | 649 MHz (family) | 649 MHz (family) | 649 MHz (family) | 649 MHz (family) | 649 MHz (family) | 649 MHz (family) |
| Speed Grade | Standard | -1 (faster) | Standard | -1 (faster) | Standard | Standard |
| Core Supply Voltage | 1.5 V | 1.5 V | 1.5 V | 1.5 V | 1.5 V | 1.5 V |
| Configuration Technology | Antifuse (single-chip, live at power-up) | Antifuse | Antifuse | Antifuse | Antifuse | Antifuse |
主要差異化特點
- Configuration-upset immunity from antifuse fabric (對比RTAX250S-CG624B)
- Higher performance without redesign (對比RTAX250SL-CGS624B)
- Lead-free assembly option on the same footprint (對比RTAX250SL-CG624B (non-S))
- Trade-off: one-time programmability (對比RTAX250SL-1CG624B)
設計說明
The CCGA624 package uses solder columns, not solder spheres. Land patterns must be designed for high-lead column reflow per the Microchip RTAX-S/SL datasheet package section and IPC-class space workmanship requirements of your program. Provide X-ray inspection access beneath the device, since column solder joints cannot be visually verified. Use symmetric thermal relief on column lands to prevent tombstoning during reflow, and qualify a rework procedure before flight build - CCGA rework requires specialized nozzles and column re-attachment tooling.
Antifuse devices are one-time programmable: the configured netlist routing and timing are frozen and identical on every unit, which aids verification, but a design change requires new programmed parts with associated programming lead time. Freeze the RTL, run Microchip Libero place-and-route, and lock the netlist under configuration control well before the flight-lot programming date. Also remember that radiation tolerance covers the configuration layer; user flip-flops remain SEE-sensitive and require TMR or EDAC per Microchip's RTAX reliability application notes.
The RTAX250SL uses a 1.5 V core with a 0.15 um antifuse process that draws low static power, but dynamic power scales with clock activity and toggle rate. Estimated: for flight power budgets, calculate dynamic power from your post-place-and-route simulation activity files using Microchip's power estimator rather than family headline figures. Sequence the 1.5 V core and I/O rails per the datasheet power-up specification and verify inrush into the CCGA624's decoupling network with measured ESR values on flight-lot capacitors.
With 624 columns and high user-I/O density, manage return paths by assigning solid ground reference planes under every I/O bank and keeping spaceflight bus interfaces (1553, SpaceWire-class links) on length-matched, impedance-controlled routing. Estimated: maintain your program's specified differential impedance (commonly 100 ohm) on paired I/O and reserve the FPGA's segmentable clock resources to isolate detector or bus clocking from switching noise on adjacent banks, per the clocking chapter of the RTAX-S/SL datasheet.
合規資訊
Space-grade ceramic CCGA package; standard CG624B termination and S-suffix lead-free variants exist (RTAX250SL-CGS624B). AEC-Q100 is not applicable to this space-flight product. Extract formal RoHS/REACH declarations from Microchip product pages before contract.
