MC68LC040FE25A - 32-Bit 25MHz 68040 MPU, 184-CQFP | NXP
N.º da peça: MC68LC040FE25A ✗ Fim de vida| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $145 | $145,00 |
| 10 | $132.5 | $1.325,00 |
| 100 | $118 | $11.800,00 |
| 250 | $105 | $26.250,00 |
| 500 | $92.5 | $46.250,00 |
MC68LC040FE25A Visão geral
A microprocessor (MPU) in the 680x0/CISC family is a self-contained CPU die that fetches instructions from external memory and executes them in hardware. The M68k family is the CISC hypernym; the 68040 sits at the top of the line with Harvard-style split instruction/data caches, a pipelined integer core, and MMU support. The 'LC' suffix designates the cache-only, no-FPU variant used in industrial controllers, telecom routers, and legacy VMEbus systems where floating point is rarely required.
Key features include a 4 KB instruction cache and 4 KB data cache, a fully associative MMU with 4-entry I-cache and 4-entry D-cache TLBs, 32-bit internal data and address buses, and a 32-bit external data bus multiplexed with address. The die dissipates approximately 1.4 W at full clock with all units active, and the CQFP-184 ceramic package is rated for -40C to +85C industrial operation with MSL 1 (unlimited floor life). The 'FE' package code designates the ceramic CQFP-184 windowed/ceramic variant rather than the plastic PQFP.
The 68040 architecture combines a six-stage pipeline with dual-issue load/store, branch prediction, and burst-mode memory support, delivering sustained performance well above the earlier 68030. The 'LC' die is pin-compatible with the full 68040, allowing software-identical footprint designs that can be upgraded by swapping in the MC68040RC / MC68EC040 / full MC68040 family when FPU capability is required.
Typical applications include legacy VMEbus single-board computers, industrial control PLCs, telecom line cards, military/aerospace command-and-control systems, and long-lifecycle embedded computing platforms where software portability outweighs raw throughput. The CQFP-184 ceramic package is preferred for avionics and defense programs that require hermetic packaging.
When designing, verify that 5.0 V I/O is acceptable to your memory and glue logic - the 68040 does not support 3.3 V interfaces without external transceivers. Provide a 25 MHz fundamental-mode oscillator or crystal input to the CLK pin and ensure the bus-sizing mode pins match the chosen memory width to avoid bus-error traps at boot.
Alternativas drop-in para MC68LC040FE25A — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
MC68LC040FE33A
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MC68LC040FE40A
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MC68040FE25A
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MC68EC040FE25A
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MC68EC040FE40A
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MC68EC040FE33A
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MC68LC040FE25A Classificações máximas e características elétricas
| Core Processor | 68040 |
| Number of Cores | 1 |
| Bus Width | 32-bit |
| Clock Speed | 25 MHz |
| Operating Voltage (I/O) | 5.0 V |
| Instruction Cache | 4 KB |
| Data Cache | 4 KB |
| MMU | Yes (4-entry I-TLB and D-TLB) |
| FPU | No (LC variant - cache only) |
| Encapsulamento | 184-CQFP (31.3 x 31.3 mm) |
| Tipo de montagem | Surface Mount (ceramic CQFP) |
| Temperatura de operação | -40C to +85C |
| Nível MSL | 1 (unlimited floor life) |
| Lead Free / RoHS | Lead Free, RoHS Compliant |
| Packaging | Tray |
| Process Technology | 0.57 micron CMOS |
Guia de Configuração de Pinos do MC68LC040FE25A 184-cqfp (31.3 x 31.3 mm)
Configuração de pinos para MC68LC040FE25A (pacote 184-cqfp (31.3 x 31.3 mm)). Este CI digital inclui GPIO, interfaces de comunicação (UART, SPI, I2C) e pinos de alimentação. Consulte o datasheet do fabricante para funções alternativas dos pinos e opções de configuração. Essencial para projeto de sistemas embarcados e layout de PCB.
Nenhum dado detalhado de pinagem disponível para MC68LC040FE25A.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
MC68LC040FE25A é adequado para 6 aplicaçãos: Legacy VMEbus Single-Board Computers, Industrial Control PLCs, Telecom Line Cards and Switch Fabric Controllers, Military and Aerospace Avionics, Medical Imaging Front-End Processors, Long-Lifecycle Embedded Computing Platforms.
Legacy VMEbus Single-Board Computers
The MC68LC040FE25A is a drop-in CPU for legacy VMEbus single-board computers (SBCs) used in industrial automation, telecom central-office switches, and military command systems. Its 32-bit 68040 integer core, 4 KB instruction + 4 KB data caches, and integrated MMU support full UNIX-like operating systems (Linux 68k, NetBSD/m68k, VxWorks) running legacy control software. The 25 MHz clock delivers adequate performance for protocol processing, while the CQFP-184 ceramic package survives the thermal and vibration stresses of telecom central-office deployment. Unlike full MC68040 variants, the LC removes the FPU silicon to reduce cost in floating-point-light control loops. Same-footprint MC68LC040FE33A and FE40A speed grades allow field upgrades without board rework.
Recomendado
Industrial Control PLCs
The MC68LC040FE25A powers mid-to-high-end industrial PLCs and process controllers where deterministic execution of ladder-logic-equivalent code is required. The 68040 instruction set with on-chip MMU supports protected-mode real-time OS kernels such as VxWorks or OS-9, while the 4 KB caches reduce external memory bus traffic on scan-cycle boundaries. The 5 V I/O compatibility simplifies interface to legacy 5 V peripheral ASICs still common in factory-automation racks. Designers opting for hard real-time determinism may select the MMU-disabled MC68EC040FE25A variant instead, which removes page-table walk jitter from interrupt latency budgets.
Recomendado
Telecom Line Cards and Switch Fabric Controllers
The MC68LC040FE25A serves as the supervisory processor on telecom line cards and ATM/SONET switch fabric controllers, offloading control-plane processing from the main forwarding ASIC. Its 32-bit address space allows direct mapping of large route tables and signaling stacks without paging overhead. The 25 MHz speed is sufficient for call-control SS7 / ISDN / VoIP signaling stacks, and the integrated MMU allows full-protocol-stack OS hosting. The CQFP-184 ceramic package withstands the thermal cycling of outdoor-cabinet deployment. Compared to full MC68040, the LC variant cuts die cost and power while preserving integer throughput that dominates call-processing workloads.
Recomendado
Military and Aerospace Avionics
The MC68LC040FE25A in CQFP-184 ceramic packaging is qualified into military and aerospace avionics programs requiring hermetic, extended-temperature-range operation. Its 32-bit 68040 instruction set maintains software compatibility with decades of deployed flight-control, navigation, and mission-computer codebases. The -40C to +85C industrial temperature range plus ceramic hermeticity make it suitable for cockpit displays, flight management systems, and radar signal pre-processors. Designers requiring additional speed headroom can substitute the FE33A / FE40A speed grades in the same CQFP-184 footprint, or step up to the full MC68040FE25A if floating-point sensor fusion is required.
Recomendado
Medical Imaging Front-End Processors
The MC68LC040FE25A functions as a front-end processor in ultrasound and CT imaging subsystems, performing beamforming, scan conversion, and DICOM-stack preprocessing before handoff to the host CPU. Its 4 KB instruction + 4 KB data caches reduce wait states on burst memory accesses to imaging frame buffers, and the 32-bit integer ALU executes pixel-processing loops efficiently. The 5 V I/O matches legacy medical-grade peripherals and ADCs. Designers building new medical imaging platforms should also evaluate the pin-compatible MC68LC040FE33A / FE40A for higher pixel throughput, or migrate to ColdFire MCF5470 for equivalent object-code compatibility at lower power.
Recomendado
Long-Lifecycle Embedded Computing Platforms
The MC68LC040FE25A targets long-lifecycle embedded computing platforms - railway signaling, nuclear-plant monitoring, and shipboard control systems - where 30+ year field life and software stability outweigh raw throughput. Its mature 0.57 micron CMOS process is fully de-risked and supported by NXP's extended-lifecycle programs and authorized aftermarket stockists (Rochester Electronics, etc.). The MMU-supported LC variant allows legacy UNIX-like OS deployments while the EC variant enables simpler flat-memory models. The CQFP-184 ceramic body is preferred over plastic PQFP for these programs due to its hermeticity and long-term solder-joint reliability under thermal cycling.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para MC68LC040FE25A — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | MC68LC040FE33A | MC68LC040FE40A | MC68040FE25A | MC68EC040FE25A | MC68EC040FE40A |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 184-CQFP (31.3 x 31.3 mm) | 184-CQFP - same | 184-CQFP - same | 184-CQFP - same | 184-CQFP - same | 184-CQFP - same |
| Clock Speed | 25 MHz | 33 MHz | 40 MHz | 25 MHz | 25 MHz | 40 MHz |
| FPU | No (LC = cache only) | No | No | Yes (integrated) | No | No |
| MMU | Yes (4-entry I-TLB and D-TLB) | Yes | Yes | Yes | No (disabled for real-time) | No (disabled) |
| Instruction Cache | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB |
| Data Cache | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB | 4 KB |
| Operating Voltage (I/O) | 5.0 V | 5.0 V | 5.0 V | 5.0 V | 5.0 V | 5.0 V |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
Principais diferenciais
- Cache-only variant strips FPU silicon to reduce cost in floating-point-light applications (vs MC68040FE25A)
- Fully associative MMU enables full UNIX-like OS deployment (vs MC68EC040FE25A)
- 25 MHz speed grade offers the lowest-cost entry into the 68040 architecture (vs MC68LC040FE40A)
Notas de projeto
Estimated: The MC68LC040FE25A draws approximately 1.4 W at full 25 MHz clock with both caches active. Design a 5.0 V regulator with at least 1.5 A peak capacity to support inrush during cache-fill burst cycles. Add bulk decoupling (33 uF tantalum) at the PCB input plus 0.1 uF ceramic decoupling within 5 mm of every Vcc/GND pair. The 68040 is sensitive to Vcc droop during bus cycles; an undersized regulator will manifest as intermittent bus-error traps.
Route the 32-bit address/data multiplexed bus with matched impedance and keep trace lengths within 50 mm to avoid timing skew. Place the CLK oscillator within 25 mm of the CLK pin and guard the trace with ground vias. Because the CQFP-184 has a ceramic body with high thermal mass, thermal vias under the package center pad are recommended for extended-temperature designs. Daisy-chain the bus-sizing mode pins (SIZ0/SIZ1) to Vcc or GND through 4.7 kohm resistors to set the bus width at reset.
Do not assume pin-compatibility with the plastic PQFP variant (FE-package plastic) when migrating from plastic to ceramic CQFP - the package codes differ and socket footprints are not interchangeable. Ensure that 5.0 V tolerance is acceptable for all connected memory and glue logic; the 68040 will drive 5 V TTL levels onto 3.3 V peripherals and damage them. Always assert RESET for at least 100 ms at power-up; the 68040 requires a stable CLK for several cycles before the internal PLL locks, and a premature deassertion of RESET causes undefined bus-state behavior.
Informações de conformidade
RoHS compliant per DigiKey product page; lead-free confirmed. Not AEC-Q100 qualified - this is a legacy industrial/military microprocessor. Halogen-free status not explicitly stated in the verified data.
