MC68LC040FE25A - 32-Bit 25MHz 68040 MPU, 184-CQFP | NXP
料号： MC68LC040FE25A ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 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 概述
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.
直接替换替代料： MC68LC040FE25A ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
MC68LC040FE33A
✅ 直接替换📋 参考替代料（不在目录中）
MC68LC040FE40A
✅ 直接替换📋 参考替代料（不在目录中）
MC68040FE25A
✅ 直接替换📋 参考替代料（不在目录中）
MC68EC040FE25A
✅ 直接替换📋 参考替代料（不在目录中）
MC68EC040FE40A
✅ 直接替换📋 参考替代料（不在目录中）
MC68EC040FE33A
✅ 直接替换📋 参考替代料（不在目录中）
MC68LC040FE25A 最大额定值与电气特性
| 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) |
| 封装 | 184-CQFP (31.3 x 31.3 mm) |
| 安装类型 | Surface Mount (ceramic CQFP) |
| 工作温度 | -40C to +85C |
| MSL 等级 | 1 (unlimited floor life) |
| Lead Free / RoHS | Lead Free, RoHS Compliant |
| Packaging | Tray |
| Process Technology | 0.57 micron CMOS |
MC68LC040FE25A 184-cqfp (31.3 x 31.3 mm) 引脚配置指南
MC68LC040FE25A（184-cqfp (31.3 x 31.3 mm) 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： MC68LC040FE25A.
请参阅 数据手册 以查看完整引脚配置。
典型应用
MC68LC040FE25A 适用于 6 应用s: 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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： MC68LC040FE25A ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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 |
关键差异点
- Cache-only variant strips FPU silicon to reduce cost in floating-point-light applications （对比 MC68040FE25A)
- Fully associative MMU enables full UNIX-like OS deployment （对比 MC68EC040FE25A)
- 25 MHz speed grade offers the lowest-cost entry into the 68040 architecture （对比 MC68LC040FE40A)
设计说明
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.
合规信息
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.
