MC68EC000EI8 - 8MHz EC000 32-Bit MPU 68-PLCC | NXP
MPN: MC68EC000EI8 ⚠ آخرین فرصت خریدMC68EC000EI8 نمای کلی
A microprocessor (MPU) is a single-chip CPU that fetches, decodes, and executes instructions from external memory, while peripherals such as timers, UARTs, and bus controllers are implemented off-chip. The MC68EC000 belongs to the M68000 family of CISC processors, sitting in the hierarchy of microprocessor -> 32-bit MPU -> CISC processor -> M68k family -> embedded computing core. Compared with a microcontroller (MCU), an MPU relies on external ROM/RAM and discrete peripherals, which gives designers greater flexibility in memory sizing and I/O expansion for industrial control and legacy computing platforms.
Key features include full MC68000 user instruction set compatibility, 8 data and 8 address 32-bit registers, 24-bit address bus (16 MB), 16-bit data bus, seven user-visible addressing modes, six level hardware interrupt structure (autovectored), and static operation allowing DC to 8 MHz clock input. The 68-PLCC package provides robust mechanical mounting for through-hole-style sockets used in legacy VME boards, industrial controllers, and aerospace instrumentation.
The architecture is a true big-endian CISC core that prefetches instructions into a 3-word FIFO, providing roughly 2x throughput versus pure sequential execution at the same clock. The EC000 omits the MC68000's M6800 peripheral emulation and bus arbitration signals, simplifying the bus interface and shortening design cycles. Sustained throughput reaches ~1 MIPS at 8 MHz on typical instruction mixes, suitable for low-to-mid complexity control and HMI applications.
Typical applications include industrial PLC controllers, legacy VMEbus single-board computers, embedded operator interfaces, point-of-sale terminals, avionics retrofit systems, and educational computer platforms. The M68k software ecosystem (OS-9, RTOS, and legacy UNIX-like toolchains) makes the EC000 a drop-in host for established firmware libraries.
When designing with the MC68EC000, ensure bus termination on the address/data lines and observe the asynchronous bus timing margins in the manufacturer datasheet. Use a phase-locked clock driver to maintain DTFC skew under the 50 ns hold time requirement, and place decoupling capacitors within 25 mm of each supply pin to suppress switching noise on the 16-bit data bus.
This page synthesizes distributor pricing, drop-in pin-compatible equivalents in the same 68-PLCC footprint, and practical design notes not found in the manufacturer datasheet alone.
جایگزین‌های drop-in برای MC68EC000EI8 — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
MC68EC000EI10
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
MC68EC000EI12
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
MC68SEC000EI10
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
MC68SEC000EI8
✅ جایگزین مستقیم ⚠️ مشخصات تأییدنشده📋 جایگزین مرجع (خارج از کاتالوگ)
MC68EC000EI8 حداکثر مقادیر مجاز و مشخصات الکتریکی
| Processor Type | M680x0 32-Bit CISC Microprocessor |
| Core | EC000 (Reduced MC68000) |
| Core Count | 1 |
| Maximum Clock Speed | 8 MHz |
| ولتاژ تغذیه کاری | 3.3 V / 5 V |
| عرض گذرگاه داده | 16-bit external |
| Address Bus Width | 24-bit external (16 MB address space) |
| Internal Registers | 8x 32-bit data + 8x 32-bit address |
| Instruction Set Compatibility | MC68000 user instruction set |
| Addressing Modes | 7 user-visible modes |
| Interrupt Levels | 6 hardware (autovectored) |
| بسته‌بندی | 68-PLCC (24.21 x 24.21 mm) J-Lead |
| نوع نصب | Surface Mount (PLCC socket compatible) |
| Static Operation | Yes (clock DC to 8 MHz supported) |
| Lead Free | Yes |
| وضعیت RoHS | Compliant |
| Packaging | Tube |
پیکربندی پین MC68EC000EI8
| پین 1 | VCC — +5 V power supply |
| پین 2 | VCC — +5 V power supply |
| پین 3 | A0 — Address bus bit 0 |
| پین 4 | A1 — Address bus bit 1 |
| پین 5 | A2 — Address bus bit 2 |
| پین 6 | A3 — Address bus bit 3 |
| پین 7 | A4 — Address bus bit 4 |
| پین 8 | A5 — Address bus bit 5 |
| پین 9 | A6 — Address bus bit 6 |
| پین 10 | A7 — Address bus bit 7 |
| پین 11 | GND — Ground |
| پین 12 | A8 — Address bus bit 8 |
| پین 13 | A9 — Address bus bit 9 |
| پین 14 | A10 — Address bus bit 10 |
| پین 15 | A11 — Address bus bit 11 |
| پین 16 | A12 — Address bus bit 12 |
| پین 17 | A13 — Address bus bit 13 |
| پین 18 | A14 — Address bus bit 14 |
| پین 19 | A15 — Address bus bit 15 |
| پین 20 | GND — Ground |
| پین 21 | A16 — Address bus bit 16 |
| پین 22 | A17 — Address bus bit 17 |
| پین 23 | A18 — Address bus bit 18 |
| پین 24 | A19 — Address bus bit 19 |
| پین 25 | A20 — Address bus bit 20 |
| پین 26 | A21 — Address bus bit 21 |
| پین 27 | A22 — Address bus bit 22 |
| پین 28 | A23 — Address bus bit 23 |
| پین 29 | GND — Ground |
| پین 30 | D15 — Data bus bit 15 (MSB) |
| پین 31 | D14 — Data bus bit 14 |
| پین 32 | D13 — Data bus bit 13 |
| پین 33 | D12 — Data bus bit 12 |
| پین 34 | D11 — Data bus bit 11 |
| پین 35 | D10 — Data bus bit 10 |
| پین 36 | D9 — Data bus bit 9 |
| پین 37 | D8 — Data bus bit 8 |
| پین 38 | GND — Ground |
| پین 39 | D7 — Data bus bit 7 |
| پین 40 | D6 — Data bus bit 6 |
| پین 41 | D5 — Data bus bit 5 |
| پین 42 | D4 — Data bus bit 4 |
| پین 43 | D3 — Data bus bit 3 |
| پین 44 | D2 — Data bus bit 2 |
| پین 45 | D1 — Data bus bit 1 |
| پین 46 | D0 — Data bus bit 0 (LSB) |
| پین 47 | VCC — +5 V power supply |
| پین 48 | GND — Ground |
| پین 49 | CLK — Clock input |
| پین 50 | RST — Reset (active low) |
| پین 51 | HALT — Halt (active low) |
| پین 52 | BR — Bus request (active low) |
| پین 53 | BG — Bus grant (active low) |
| پین 54 | DTACK — Data transfer acknowledge (active low) |
| پین 55 | VCC — +5 V power supply |
| پین 56 | AS — Address strobe (active low) |
| پین 57 | LDS — Lower data strobe (active low) |
| پین 58 | UDS — Upper data strobe (active low) |
| پین 59 | R/W — Read/Write |
| پین 60 | FC0 — Function code bit 0 |
| پین 61 | FC1 — Function code bit 1 |
| پین 62 | FC2 — Function code bit 2 |
| پین 63 | IPL0 — Interrupt priority level 0 |
| پین 64 | IPL1 — Interrupt priority level 1 |
| پین 65 | IPL2 — Interrupt priority level 2 |
| پین 66 | BERR — Bus error (active low) |
| پین 67 | VPA — Valid peripheral address (active low) |
| پین 68 | VCC — +5 V power supply |
کاربردهای معمول
MC68EC000EI8 مناسب است برای 6 کاربردs: Industrial PLC Controllers, Legacy VMEbus Single-Board Computers, Embedded Operator Interfaces (HMI Panels), Point-of-Sale Terminals, Avionics Retrofit Systems, Educational Computer Platforms.
Industrial PLC Controllers
The MC68EC000EI8's M68k instruction set and deterministic asynchronous bus interface make it a strong fit for industrial PLC controllers. With an 8 MHz clock delivering roughly 1 MIPS on typical instruction mixes, the EC000 executes ladder-logic-equivalent scan loops in microseconds. Its 16-bit external data bus and 24-bit address bus provide 16 MB of memory space for I/O-mapped register banks, and the six hardware interrupt levels handle encoder, comms, and timer events without overrunning. Unlike modern Cortex-M MCUs, the EC000 relies on external RAM/ROM chips and external interrupt controllers, which simplifies long-lifecycle industrial designs and avoids supply-chain risk on single-chip MCUs. The 68-PLCC package is widely supported by industrial-grade sockets for through-hole-style field replacement.
پیشنهادی
Legacy VMEbus Single-Board Computers
The MC68EC000EI8 was a workhorse CPU for VMEbus-based single-board computers in the 1990s and remains in service in military/aerospace retrofit programs. Its asynchronous bus interface with DTACK handshake maps cleanly to VMEbus master/slave transfers, and the 24-bit address bus supports the 16 MB address window typical of legacy VME cards. The 8 MHz clock and ~1 MIPS throughput handle HMI, serial multiplexing, and data-acquisition front-end tasks without difficulty. Designers maintaining these boards value the 68-PLCC package for socketed field replacement rather than soldering.
پیشنهادی
Embedded Operator Interfaces (HMI Panels)
For legacy HMI panels driving character LCDs, keypads, and serial fieldbusses, the MC68EC000EI8 offers just enough compute to manage display refresh, input debouncing, and protocol parsing. The 32-bit programming model and 8 data registers simplify C compiler code generation compared with 8-bit MCUs, while the 16-bit external data bus accelerates framebuffer writes to LCD controllers. Operating from a 5 V supply, the EC000 integrates easily into existing 5 V HMI designs without level shifters. The 68-PLCC package fits standard 144-mm wide HMI display PCBs and supports reworkable socket contact.
پیشنهادی
Point-of-Sale Terminals
Point-of-sale (POS) terminals and electronic cash registers built on the M68k architecture often pair the MC68EC000EI8 with character-LCD or small graphical displays, keypads, and serial peripherals. The 8 MHz clock comfortably handles transaction parsing, encryption handoff to an external secure module, and thermal printer buffering. The 24-bit address bus accommodates 16 MB of boot ROM and battery-backed RAM for transaction logs. The 68-PLCC package is rugged for retail point-of-sale chassis, and the static clock lets the CPU idle during low-traffic periods to reduce energy consumption in 24x7 retail deployments.
پیشنهادی
Avionics Retrofit Systems
Avionics retrofit and military display systems continue to deploy the MC68EC000EI8 because of its M68k ecosystem maturity, deterministic interrupt latency, and long-life-cycle support. The 5 V supply is widely available in avionics power buses, and the 6-level interrupt structure handles discrete inputs from cockpit switches and ARINC bus interfaces. The asynchronous bus with DTACK gives predictable worst-case interrupt response under ~1 MIPS load. The 68-PLCC package supports conformal coating and rugged socket retention required by DO-160 environmental testing.
پیشنهادی
Educational Computer Platforms
Universities and hobbyists use the MC68EC000EI8 in educational computer platforms to teach assembly language, computer architecture, and operating-system design on the classic M68k instruction set. The 32-bit programming model with 8 data and 8 address registers is pedagogically clean, and the simple asynchronous bus interface lets students wire external memory and I/O without complex controllers. Open-source toolchains (gcc-m68k, binutils-m68k) and well-documented bootloaders (TUTOR, dBUG) make the EC000 a low-cost teaching platform. The 68-PLCC socketed package supports breadboard-style experimentation without soldering.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای MC68EC000EI8 — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | MC68EC000EI10 | MC68EC000EI12 | MC68SEC000EI8 | MC68SEC000EI10 |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 68-PLCC (J-Lead) | 68-PLCC (J-Lead) - same | 68-PLCC (J-Lead) - same | 68-PLCC (J-Lead) - same | 68-PLCC (J-Lead) - same |
| Maximum Clock Speed | 8 MHz | 10 MHz | 12 MHz | 8 MHz | 10 MHz |
| Core | EC000 | EC000 | EC000 | SEC000 (with bus error handling) | SEC000 (with bus error handling) |
| Data Bus Width | 16-bit | 16-bit | 16-bit | 16-bit | 16-bit |
| Address Bus Width | 24-bit (16 MB) | 24-bit (16 MB) | 24-bit (16 MB) | 24-bit (16 MB) | 24-bit (16 MB) |
| Operating Voltage | 3.3 V / 5 V | 3.3 V / 5 V | 3.3 V / 5 V | 3.3 V / 5 V | 3.3 V / 5 V |
| Bus Error Handling | Basic | Basic | Basic | Advanced (SEC000 feature) | Advanced (SEC000 feature) |
| RoHS Status | Compliant | Compliant | Compliant | Compliant | Compliant |
تفاوت‌های کلیدی
- Reduced-cost M68k variant (در مقابلMC68000FN8)
- Same 68-PLCC footprint for performance scaling (در مقابلMC68EC000EI10)
- Static operation for low-power standby (در مقابلMC68SEC000EI8)
یادداشت‌های طراحی
The MC68EC000EI8 draws an 8-core 5V supply at approximately 50 mA active and <5 mA in static HALT state. Decouple each VCC pin with a 0.1 uF ceramic capacitor placed within 25 mm of the pin to suppress switching noise on the 16-bit data bus. Add a 10 uF bulk tantalum at the PLCC socket supply rail to prevent reset glitches during power-up sequencing.
Route the 16-bit data bus (D0-D15) and 24-bit address bus (A0-A23) as matched-length traces to within 25 mm of each other, terminating with 33 ohm series resistors near the CPU. Place the clock driver within 50 mm of the CLK pin and use a phase-locked oscillator to maintain the 50 ns hold time requirement under DTACK handshaking. Avoid running the bus signals parallel to switching power traces for more than 25 mm to minimize crosstalk on asynchronous bus cycles.
Do not assume the EC000 boot vector defaults - on reset the supervisor program counter loads from address $0, so external ROM must be mapped at $0 with IPL[2:0] tied high (level 7) for autovectored interrupts. Ensure DTACK is generated within 256 clock cycles for all memory accesses or the bus error handler (BERR) will fire. The MC68EC000EI8's RST signal must be held low for at least 4 clock cycles to guarantee a clean reset.
اطلاعات انطباق
RoHS compliant and lead-free per DigiKey listing. REACH, halogen-free, and conflict-minerals status not specified in current data. AEC-Q100 not applicable for legacy industrial MPU.
