MC68EC000EI8 - 8MHz EC000 32-Bit MPU 68-PLCC | NXP
MPN: MC68EC000EI8 ⚠ Lần mua cuốiMC68EC000EI8 Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho MC68EC000EI8 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
MC68EC000EI10
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC68EC000EI12
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC68SEC000EI10
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC68SEC000EI8
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
MC68EC000EI8 Tỷ lệ tối đa & tính chất điện
| Processor Type | M680x0 32-Bit CISC Microprocessor |
| Core | EC000 (Reduced MC68000) |
| Core Count | 1 |
| Maximum Clock Speed | 8 MHz |
| Điện áp cung cấp hoạt động | 3.3 V / 5 V |
| Bề rộng đường dữ liệu | 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) |
| Hộp | 68-PLCC (24.21 x 24.21 mm) J-Lead |
| Kiểu lắp đặt | Surface Mount (PLCC socket compatible) |
| Static Operation | Yes (clock DC to 8 MHz supported) |
| Lead Free | Yes |
| Trạng thái RoHS | Compliant |
| Packaging | Tube |
Cấu hình chân MC68EC000EI8
| Chân 1 | VCC — +5 V power supply |
| Chân 2 | VCC — +5 V power supply |
| Chân 3 | A0 — Address bus bit 0 |
| Chân 4 | A1 — Address bus bit 1 |
| Chân 5 | A2 — Address bus bit 2 |
| Chân 6 | A3 — Address bus bit 3 |
| Chân 7 | A4 — Address bus bit 4 |
| Chân 8 | A5 — Address bus bit 5 |
| Chân 9 | A6 — Address bus bit 6 |
| Chân 10 | A7 — Address bus bit 7 |
| Chân 11 | GND — Ground |
| Chân 12 | A8 — Address bus bit 8 |
| Chân 13 | A9 — Address bus bit 9 |
| Chân 14 | A10 — Address bus bit 10 |
| Chân 15 | A11 — Address bus bit 11 |
| Chân 16 | A12 — Address bus bit 12 |
| Chân 17 | A13 — Address bus bit 13 |
| Chân 18 | A14 — Address bus bit 14 |
| Chân 19 | A15 — Address bus bit 15 |
| Chân 20 | GND — Ground |
| Chân 21 | A16 — Address bus bit 16 |
| Chân 22 | A17 — Address bus bit 17 |
| Chân 23 | A18 — Address bus bit 18 |
| Chân 24 | A19 — Address bus bit 19 |
| Chân 25 | A20 — Address bus bit 20 |
| Chân 26 | A21 — Address bus bit 21 |
| Chân 27 | A22 — Address bus bit 22 |
| Chân 28 | A23 — Address bus bit 23 |
| Chân 29 | GND — Ground |
| Chân 30 | D15 — Data bus bit 15 (MSB) |
| Chân 31 | D14 — Data bus bit 14 |
| Chân 32 | D13 — Data bus bit 13 |
| Chân 33 | D12 — Data bus bit 12 |
| Chân 34 | D11 — Data bus bit 11 |
| Chân 35 | D10 — Data bus bit 10 |
| Chân 36 | D9 — Data bus bit 9 |
| Chân 37 | D8 — Data bus bit 8 |
| Chân 38 | GND — Ground |
| Chân 39 | D7 — Data bus bit 7 |
| Chân 40 | D6 — Data bus bit 6 |
| Chân 41 | D5 — Data bus bit 5 |
| Chân 42 | D4 — Data bus bit 4 |
| Chân 43 | D3 — Data bus bit 3 |
| Chân 44 | D2 — Data bus bit 2 |
| Chân 45 | D1 — Data bus bit 1 |
| Chân 46 | D0 — Data bus bit 0 (LSB) |
| Chân 47 | VCC — +5 V power supply |
| Chân 48 | GND — Ground |
| Chân 49 | CLK — Clock input |
| Chân 50 | RST — Reset (active low) |
| Chân 51 | HALT — Halt (active low) |
| Chân 52 | BR — Bus request (active low) |
| Chân 53 | BG — Bus grant (active low) |
| Chân 54 | DTACK — Data transfer acknowledge (active low) |
| Chân 55 | VCC — +5 V power supply |
| Chân 56 | AS — Address strobe (active low) |
| Chân 57 | LDS — Lower data strobe (active low) |
| Chân 58 | UDS — Upper data strobe (active low) |
| Chân 59 | R/W — Read/Write |
| Chân 60 | FC0 — Function code bit 0 |
| Chân 61 | FC1 — Function code bit 1 |
| Chân 62 | FC2 — Function code bit 2 |
| Chân 63 | IPL0 — Interrupt priority level 0 |
| Chân 64 | IPL1 — Interrupt priority level 1 |
| Chân 65 | IPL2 — Interrupt priority level 2 |
| Chân 66 | BERR — Bus error (active low) |
| Chân 67 | VPA — Valid peripheral address (active low) |
| Chân 68 | VCC — +5 V power supply |
Ứng dụng tiêu biểu
MC68EC000EI8 phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MC68EC000EI8 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- Reduced-cost M68k variant (vsMC68000FN8)
- Same 68-PLCC footprint for performance scaling (vsMC68EC000EI10)
- Static operation for low-power standby (vsMC68SEC000EI8)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.
