RTAX4000SL-1LG1272PROTO - 4M-Gate Rad-Tolerant FPGA | Microchip
MPN: RTAX4000SL-1LG1272PROTO ✓ Active| Qty | Unit Price | Extended |
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Drop-in alternatives for RTAX4000SL-1LG1272PROTO — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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RTAX4000SL-LG1272V
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View Datasheet →RTAX4000SL-CG1272B
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View Datasheet →RTAX4000SL-1CG1272PROTO
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RTAX4000SL-1LG1272B
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$9200 / Unit
View Datasheet →RTAX4000SL-1LG1272PROTO Maximum Ratings & Electrical Characteristics
| Family | RTAX-S/SL Radiation-Tolerant FPGAs |
| Logic Blocks (CLBs) | 40,320 |
| Equivalent System Gates | 4,000,000 |
| Logic Cells | 60,480 |
| Technology | CMOS, antifuse (one-time programmable) |
| Package | 1272-terminal column grid array (LG1272) |
| Terminal Pitch | 1.000 mm |
| Speed Grade | -1 (SL) |
| Qualification Flow | PROTO (prototype flow) |
| Configuration | Live at power-up, no external configuration device |
| Embedded Memory | Embedded SRAM with built-in FIFO control logic |
| Clocking | Segmentable chip-wide clocks |
| Application Domain | Space-flight systems |
| Mounting Type | Surface Mount |
RTAX4000SL-1LG1272PROTO 1272-terminal column grid array (lg1272) Pin Configuration Guide
Complete pinout information for RTAX4000SL-1LG1272PROTO (1272-terminal column grid array (lg1272) 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 RTAX4000SL-1LG1272PROTO.
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
RTAX4000SL-1LG1272PROTO is suitable for 6 applications: Satellite Payload Data Processing, Spacecraft On-Board Computing, Remote-Sensing Instrument Control, Telemetry, Tracking and Command (TT&C), Radiation-Environment Defense and Aerospace Systems, FPGA Prototyping and Design Validation.
Satellite Payload Data Processing
The RTAX4000SL-1LG1272PROTO fits satellite payload processing because its 60,480 logic cells and 4,000,000 equivalent gates provide enough fabric for real-time framing, compression, and channelization of high-rate sensor data, while the antifuse configuration is live at power-up - eliminating the boot-time and configuration-SEU exposure of SRAM FPGAs. In a typical payload chain, the device sits between the sensor front end and the downlink formatter, using embedded SRAM blocks with built-in FIFO control logic to buffer data across clock domains, and segmentable chip-wide clocks to serve independent processing slices. The 1272-terminal package at 1.000 mm pitch supports the wide parallel I/O of imaging and RF payloads, and the low-power CMOS process keeps the payload power budget within typical small-sat allocations.
Recommended
Spacecraft On-Board Computing
For on-board computer (OBC) glue logic, bus interfaces, and memory controllers, the RTAX4000SL-1LG1272PROTO offers single-chip integration that removes external configuration PROMs - a reliability benefit because the antifuse fabric cannot suffer configuration upsets in orbit. Its 40,320 CLBs implement MIL-STD-1553-style interfaces, SpaceWire endpoints, error-correcting memory controllers, and watchdog/reconfiguration state machines alongside the main data path. The PROTO flow allows the OBC team to validate firmware-hardware interaction on representative silicon early in the program, then migrate to RTAX4000SL-LG1272V flight units with identical die and footprint. Live-at-power-up operation guarantees that safety logic is active from the first instant of spacecraft power, which is a stated family advantage for space designers.
Recommended
Remote-Sensing Instrument Control
Imaging instruments and hyperspectral sensors require deterministic timing, high-I/O-count detector interfaces, and low-noise digital logic - all strengths of the RTAX4000SL-1LG1272PROTO. The 1.000 mm-pitch 1272-terminal package terminates large CCD/CMOS detector arrays with hundreds of parallel channels, while the -1 SL speed grade supports the sample-rate data paths without excessive dynamic power. Designers implement detector sequencing, correlated double sampling timing, and packetization in the 60,480 logic cells, using embedded SRAM FIFOs to decouple the sensor clock domain from the payload formatter. Using the AC170 prototyping methodology, the detector interface can first be exercised on commercial Axcelerator hardware, then ported to this PROTO unit for flight-representative validation with the actual detector electronics.
Recommended
Telemetry, Tracking and Command (TT&C)
TT&C subsystems demand the highest reliability tier of the spacecraft, and the RTAX4000SL-1LG1272PROTO is well suited during their development phase. The antifuse fabric eliminates single-event configuration upsets, while users apply RTL-level triple-module redundancy to protect state in the 40,320-CLB array. Typical TT&C implementations in this device include command decoders, PCM frame generators, encryption/decryption interfaces, and cross-strapped redundant-channel muxes - the high logic capacity lets both prime and redundant chains share one device family with identical tooling. Segmentable clocks allow the secure command path to run on an independent clock tree from telemetry formatting. After PROTO-phase validation, the identical footprint RTAX4000SL-LG1272V flight unit drops onto the same PCB.
Recommended
Radiation-Environment Defense and Aerospace Systems
Beyond civil space, the RTAX4000SL-1LG1272PROTO serves defense and high-altitude aerospace programs that encounter radiation environments, including strategic electronics and high-altitude platforms. The same properties valued in orbit apply: one-time-programmable antifuse configuration cannot be flipped by a heavy-ion strike, the CMOS process limits static power during long dwell missions, and the 4,000,000-gate capacity hosts complex signal processing such as radar front-end formatting and secure communications encoders. Microchip's UG0019 DLA Cross Reference Guide shows the RTAX-S family is qualified per MIL-PRF-38535 class Q and class V under DLA drawing numbers, giving defense procurement a documented quality path from PROTO evaluation units to fully qualified flight lots.
Recommended
FPGA Prototyping and Design Validation
The PROTO suffix is itself an application: the RTAX4000SL-1LG1272PROTO exists to let space teams validate RTL, timing, I/O behavior, and board-level signal integrity on flight-representative silicon before committing to flight-flow inventory. The recommended flow per Microchip application note AC170 is three-stage: develop on the commercial Axcelerator equivalent device with low cost and fast turnaround, then map the design onto this PROTO unit using extender boards that match the commercial package to the RTAX-S footprint, and finally move to the RTAX4000SL-LG1272V flight unit on the same PCB. Because the die, 1272-terminal package, and pinout are identical across the flows, no PCB respin or timing recharacterization of the board is required between stages.
Recommended
Recommended Products Summary
Engineering reference data for RTAX4000SL-1LG1272PROTO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | RTAX4000SL-LG1272V | RTAX4000SL-CG1272B | RTAX4000SL-1CG1272PROTO |
|---|---|---|---|---|
| Package | 1272-terminal CGA (LG1272), 1.000 mm pitch | 1272-terminal CGA (LG1272) - same | 1272-terminal CGA (CG1272) - same footprint | 1272-terminal CGA (CG1272) - same footprint |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Logic Blocks (CLBs) | 40,320 | 40,320 | 40,320 | 40,320 |
| Equivalent System Gates | 4,000,000 | 4,000,000 | 4,000,000 | 4,000,000 |
| Logic Cells | 60,480 | 60,480 | 60,480 | 60,480 |
| Qualification Flow | PROTO (prototype) | Flight (V) | Flight (B) | PROTO (prototype) |
| Configuration Technology | Antifuse, live at power-up | Antifuse, live at power-up | Antifuse, live at power-up | Antifuse, live at power-up |
| Terminal Pitch | 1.000 mm | 1.000 mm | 1.000 mm | 1.000 mm |
Key Differentiators
- PROTO flow reduces cost and lead time for early-phase validation (vs RTAX4000SL-LG1272V)
- Largest RTAX-S/SL density on a single chip (vs RTAX2000SL-1CG1152V)
- Antifuse configuration is immune to configuration SEU (vs SRAM-based space FPGAs)
Design Notes
Remember that the PROTO flow devices carry reduced screening compared to flight (V/B suffix) units - never fly a PROTO part. Plan your procurement early: flight RTAX4000SL units have long lead times, and validating on PROTO silicon is the accepted mitigation. When substituting between LG and CG terminal styles (e.g., RTAX4000SL-1CG1272PROTO), confirm the land pattern specification for each terminal type, as column grid array and ceramic grid array terminals may require different pad geometries and inspection criteria in your assembly process.
With 1,272 terminals at 1.000 mm pitch, simultaneous switching noise is the dominant signal-integrity risk. Group high-toggle-rate I/O banks away from sensitive analog/reference inputs, and assign ample power/ground terminal pairs per Microchip's package pinout tables. For payload interfaces clocked at the -1 SL speed grade limits, perform IBIS-based simulations using Microchip-supplied IBIS models for the LG1272 package, and terminate single-ended lines per flight heritage practices for column grid array assemblies.
Use the AC170 three-stage prototyping strategy to de-risk the program: develop RTL against the commercial Axcelerator equivalent, validate on this RTAX4000SL-1LG1272PROTO, then migrate to RTAX4000SL-LG1272V on the same PCB. Because the die and footprint are identical across flows, design the board once with flight constraints in mind - include fiducials and test access for column grid array X-ray inspection, and reserve SEU mitigation resources (TMR on critical flops, watchdog logic) in the RTL even during PROTO-phase development so the flight migration is a tool-flow change only.
Compliance Information
Space-grade PROTO device; compliance status not stated in provided data. RTAX-S family is qualified per MIL-PRF-38535 class Q and class V under DLA drawing numbers per Microchip UG0019 for flight-flow units; verify PROTO-unit compliance documentation with Microchip.
