MC68340FE25E - 32-Bit MPU with DMA, 25MHz, 144-CQFP | NXP
MPN: MC68340FE25E ✗ پایان تولیدMC68340FE25E نمای کلی
A microprocessor (MPU) is a single-chip CPU that fetches, decodes, and executes instructions from external memory and coordinates system peripherals through on-chip or external bus interfaces. Within the broader hierarchy, this device sits at: MPU -> microcontroller-class processor -> embedded computing IC -> semiconductor. The MC68340 specifically belongs to the M68000 (M68K) CISC family, a long-established architecture known for orthogonal instruction sets, robust memory management, and broad use in industrial control, telecommunications, and aerospace systems.
Key features include the CPU32 core at 25 MHz (10 MIPS sustained), two 32-bit DMA channels capable of independent memory-to-memory or peripheral-to-memory transfers, a 16-bit data bus with 32-bit internal registers, dual timers, a serial communications interface, and a parallel I/O subsystem. The integrated DRAM controller supports both page-mode and nibble-mode DRAMs, while the chip-select module reduces external decoder logic. The CQFP-144 ceramic package is rated for harsh-environment operation and is compatible with MIL-STD-883 screening flows.
The MC68340 architecture fuses a CISC instruction set with RISC-like pipelining, giving it deterministic interrupt latency and a familiar M68K toolchain (GCC, Diab, Green Hills). The DMA engine performs transfers without CPU intervention, freeing the core for real-time control tasks. Compared with later ColdFire parts, the MC68340 retains full M68000 object-code compatibility while adding DMA and a richer peripheral mix.
Typical applications include industrial process controllers, telecom baseband control, military and aerospace embedded systems, point-of-sale terminals, and legacy M68K upgrades where software compatibility is mandatory. Designers value the device for deterministic interrupt response and the wide ecosystem of mature development tools.
When designing with this device, pay attention to bus arbitration between the CPU and the two DMA channels, and ensure external wait-state logic is sized correctly for slow peripherals. The 144-pin CQFP requires a socket or careful solder reflow with a windowed or hermetic footprint. For new designs, consider the ColdFire MCF5301x family for similar peripheral mix with lower power.
This page synthesizes distributor pricing, drop-in M68K alternatives, and application notes not found in the standalone datasheet, helping engineers locate second-source options and plan long-term availability for legacy M68000 systems.
جایگزین‌های drop-in برای MC68340FE25E — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
گونه‌ها در این سری
مدل‌های هم‌سری که جایگزین مستقیم هستند برای MC68340FE25E (همان فرم‌فاکتور و فوت‌پرینت) — متفاوت در Chip-Select Outputs, Core Architecture, DMA Channels, Mounting Type, Package.
MC68340FE20
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشده📋 جایگزین مرجع (خارج از کاتالوگ)
MC68340FE16
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشده📋 جایگزین مرجع (خارج از کاتالوگ)
MC68340CFE25
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشده📋 جایگزین مرجع (خارج از کاتالوگ)
MC68340FE25
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشده📋 جایگزین مرجع (خارج از کاتالوگ)
MC68340PV25E
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشده📋 جایگزین مرجع (خارج از کاتالوگ)
MC68340FE25E حداکثر مقادیر مجاز و مشخصات الکتریکی
| Manufacturer | NXP Semiconductors (formerly Motorola/Freescale) |
| Part Number | MC68340FE25E |
| Core Architecture | CPU32 (M68000-compatible, 32-bit CISC) |
| حداکثر فرکانس کلاک | 25 MHz |
| عرض گذرگاه داده | 16-bit external, 32-bit internal registers |
| DMA Channels | 2 x 32-bit full-duplex channels |
| Timers | 2 x 16-bit general-purpose timers |
| Serial Interface | 1 x UART (SCI) |
| Parallel I/O | Multi-function parallel port subsystem |
| DRAM Controller | Page-mode and nibble-mode DRAM support |
| Chip-Select Outputs | Multiple programmable chip-select lines |
| بسته‌بندی | 144-pin CQFP (Ceramic Quad Flat Pack), 26.77 x 26.77 mm |
| دمای کاری | Extended grade (E suffix) |
| نوع نصب | Surface Mount (ceramic CQFP) |
| Instruction Set Compatibility | M68000 user-object-code compatible |
راهنمای پیکربندی پین MC68340FE25E 144-pin cqfp (ceramic quad flat pack), 26.77 x 26.77 mm
پیکربندی پین برای MC68340FE25E (پکیج 144-pin cqfp (ceramic quad flat pack), 26.77 x 26.77 mm). این IC دیجیتال شامل GPIO، رابط‌های ارتباطی (UART، SPI، I2C) و پین‌های تغذیه است. برای عملکردهای جایگزین پین و گزینه‌های پیکربندی به دیتاشیت سازنده مراجعه کنید. ضروری برای طراحی سیستم‌های نهفته و چیدمان PCB.
داده پین‌آوت تفصیلی موجود نیست برای MC68340FE25E.
به دیتاشیت برای پیکربندی کامل پین‌ها.
کاربردهای معمول
MC68340FE25E مناسب است برای 6 کاربردs: Industrial Process Controllers, Telecommunications Baseband Control, Military and Aerospace Embedded Systems, Point-of-Sale Terminals, Legacy M68K System Upgrades, Data Acquisition Front-Ends.
Industrial Process Controllers
The MC68340FE25E suits industrial process controllers thanks to its deterministic M68K interrupt latency and on-chip DMA that offloads high-speed data acquisition from the CPU32 core. At 25 MHz the part provides approximately 10 MIPS sustained, which is sufficient for closed-loop PID loops sampling analog inputs at multi-kHz rates. The integrated chip-select and DRAM controller minimize external glue logic, enabling compact PLC and DCS modules. The extended-temperature CQFP grade also tolerates factory-floor thermal stress. Designers favor this MPU for long-life programs where M68K code bases must remain maintainable for 15-20 years.
پیشنهادی
Telecommunications Baseband Control
In telecom equipment, the MC68340FE25E is typically deployed as a baseband control processor handling signaling stacks, link-layer protocols, and housekeeping for line-card FPGAs. The SCI interface links to supervisory MCUs, while the DMA channels move packet data between DSP front-ends and system memory without CPU overhead. The 32-bit CPU32 core executes protocol state machines with predictable timing, and the M68K toolchain remains a mature choice for telecom software teams. The part's high-reliability CQFP package supports central-office and outside-plant deployments where field serviceability over decades is critical.
پیشنهادی
Military and Aerospace Embedded Systems
The MC68340FE25E in its 144-pin ceramic CQFP package is a recognized part for military and aerospace programs where extended temperature, radiation tolerance flows, and decades-long product support are mandatory. The CPU32 core supports legacy mission software, while the two DMA channels handle high-rate sensor and telemetry streams. Many flight computers and ground-test rigs built on this part remain in service and are maintained through franchised long-term supply partners like Rochester Electronics. Migration to newer ColdFire parts is feasible, but only when software re-verification budgets allow.
پیشنهادی
Point-of-Sale Terminals
Point-of-sale (POS) terminals benefit from the MC68340FE25E's combination of M68K familiarity, integrated peripherals, and proven long-life support. The CPU32 core drives transaction logic, peripheral controllers, and display/keypad handling, while DMA channels move receipt-printer and magnetic-stripe-reader data without burdening the application. The on-chip DRAM controller and chip-select module keep the bill of materials compact, which is critical for cost-sensitive POS form factors. Existing M68K firmware libraries accelerate time-to-market and reduce validation cost when extending a legacy platform.
پیشنهادی
Legacy M68K System Upgrades
When upgrading fielded M68K designs, the MC68340FE25E serves as a drop-in replacement for older MC68000/MC68020 boards that need higher DMA bandwidth and integrated peripherals but must preserve the existing footprint and pinout. Designers can port firmware without learning a new instruction set, since the CPU32 is object-code compatible with the M68000 family. This makes the MC68340 a low-risk lifecycle extension for industrial, scientific, and medical equipment originally built around earlier M68K parts. Boards usually require only minor clock and wait-state rework.
پیشنهادی
Data Acquisition Front-Ends
Multi-channel data acquisition front-ends use the MC68340FE25E to coordinate ADC sampling, buffer-to-host transfers, and on-the-fly digital signal conditioning. The two 32-bit DMA channels stream samples directly from ADC FIFOs into memory without CPU intervention, sustaining burst rates well above the 25 MHz CPU throughput when sample buffers are page-aligned. The integrated chip-select lines generate per-channel timing strobes, while the DRAM controller supports large local sample buffers. This MPU is favored where deterministic acquisition timing and a robust M68K code base outweigh the appeal of newer ARM Cortex parts.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای MC68340FE25E — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | MC68340FE20 | MC68340FE16 | MC68340CFE25 | MC68340FE25 | MC68340PV25E |
|---|---|---|---|---|---|---|
| Package | 144-CQFP (26.77x26.77 mm) | 144-CQFP (same) | 144-CQFP (same) | 144-CQFP (same) | 144-CQFP (same) | 144-PGA |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Maximum Clock | 25 MHz | 20 MHz | 16 MHz | 25 MHz | 25 MHz | 25 MHz |
| Core | CPU32 (M68K) | CPU32 (M68K) | CPU32 (M68K) | CPU32 (M68K) | CPU32 (M68K) | CPU32 (M68K) |
| DMA Channels | 2 x 32-bit | 2 x 32-bit | 2 x 32-bit | 2 x 32-bit | 2 x 32-bit | 2 x 32-bit |
| Temperature Grade | Extended (-40C to +85C) | Extended | Extended | Commercial | Standard | Extended |
| Mounting | Surface Mount (CQFP) | Surface Mount (CQFP) | Surface Mount (CQFP) | Surface Mount (CQFP) | Surface Mount (CQFP) | Through-hole PGA |
| Lifecycle | NRND | NRND | NRND | NRND | NRND | NRND |
تفاوت‌های کلیدی
- Extended-temperature grade on CQFP for harsh environments (در مقابلMC68340CFE25)
- 25 MHz headroom over lower-speed siblings (در مقابلMC68340FE16)
- Surface-mount CQFP for automated assembly (در مقابلMC68340PV25E)
یادداشت‌های طراحی
Do not assume the bus arbitration priorities are static; both DMA channels and the CPU compete for the external bus, and misconfigured priorities can starve peripherals in heavy I/O workloads. Read section on bus arbitration in the Freescale MC68340 User's Manual and benchmark with worst-case DMA burst patterns before locking the design. The 16-bit external data bus limits single-instruction throughput versus a 32-bit bus, so avoid designs that depend on 32-bit memory bandwidth without external bus steering.
The 144-pin ceramic CQFP has gull-wing leads on a 0.635 mm pitch; the ceramic body and lead finish demand a controlled reflow profile to avoid thermal-shock cracking. Use a soak-then-peak profile with preheat between 150C and 200C, and cap peak temperature at 220C for leaded finish or 245C for lead-free. Provide a uniform copper pour under the package to spread heat and minimize TCE mismatch stress during thermal cycling. Confirm coplanarity before placement to avoid opens during reflow.
At 25 MHz the address and data buses have edge rates that benefit from series termination on long traces; a 33 ohm resistor in series with each bus line near the driver reduces ringing on backplanes longer than 100 mm. Place the MC68340, DRAM, and ROM/flash on the same layer to avoid via stubs on high-speed lines. Keep CLKOUT trace short and guard it with ground on both sides. Use a ground plane immediately beneath the bus signals to control impedance.
اطلاعات انطباق
RoHS, REACH, lead-free, and halogen-free status are not specified in the verified distributor data reviewed on 2026-10-16. Ceramic CQFP parts historically use non-RoHS lead finishes; designers requiring RoHS-compliant M68K silicon should consult NXP directly or migrate to plastic-packaged ColdFire parts. AEC-Q100 is not applicable (automotive-qualified MPUs use a different part numbering).
