MC68HC000IEI16 - 32-Bit 16MHz M68000 MPU, 68-PLCC | NXP
MPN: MC68HC000IEI16 ✓ فعالMC68HC000IEI16 نمای کلی
A microprocessor (MPU) is the central processing unit of an embedded computer system, integrating an arithmetic logic unit, register file, and control logic into a single IC. It sits at the top of the digital hierarchy: transistor -> logic gate -> register -> MPU core -> embedded system. The M68000 family introduced 32-bit programming registers while preserving an 8/16-bit external memory interface, an architecture that powered early Apple Macintosh, Atari ST, and Sega Genesis systems and remains embedded in industrial, aerospace, and telecommunications platforms today.
Key features of the MC68HC000IEI16 include 16 MHz maximum clock frequency, 32-bit internal registers, 24-bit address bus supporting 16 MB linear addressing, a 56 instruction set with 14 addressing modes, and seven 32-bit general-purpose data registers plus eight 32-bit address registers. Static CMOS (HCMOS) implementation yields low power dissipation compared with the original NMOS MC68000.
Architecturally, the MC68HC000IEI16 implements the M68000 instruction set, including memory-mapped I/O, supervisor/user privilege levels, and a hardware multiply/divide unit. Its synchronous bus interface requires an external clock driver (e.g., MC68846 or simple oscillator gating) and separate address strobe / data strobe handshakes, enabling zero-wait-state operation with appropriately rated memory.
Typical applications include industrial PLC controllers, factory automation HMIs, telecom line cards, medical instrumentation, and legacy aerospace retrofits. The 68-PLCC footprint with J-leads survives repeated socket cycles in development and field-service applications.
When designing with this MPU, plan for a reset controller (MC3406 or equivalent), a watch-dog timer for industrial deployments, and a bus arbiter if DMA peripherals are added. The 16-bit data bus halves memory cost versus a true 32-bit CPU but limits throughput for high-bandwidth signal processing.
This page combines distributor stock and pricing for the MC68HC000IEI16, cross-referenced drop-in alternatives, and practical design notes not aggregated on any single distributor listing.
جایگزین‌های drop-in برای MC68HC000IEI16 — همان پکیج، سازگار پین‌به‌پین. قطعات با پکیج متفاوت که نیاز به تغییر PCB دارند مستثنی هستند.
MC68HC000IEI10
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
MC68HC000IEI20
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
MC68HC000FN16
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
MC68HC001IEI16
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
MC68EC000IEI16
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
MC68SEC000AEI16
✅ جایگزین مستقیم📋 جایگزین مرجع (خارج از کاتالوگ)
MC68HC000IEI16 حداکثر مقادیر مجاز و مشخصات الکتریکی
| Core Architecture | M68000 (32-bit internal, 16-bit external data bus) |
| حداکثر فرکانس کلاک | 16 MHz |
| عرض گذرگاه داده | 16-bit external / 32-bit internal |
| Address Bus Width | 24-bit (16 MB address space) |
| Instruction Set | M68000, 56 instructions, 14 addressing modes |
| General-Purpose Data Registers | 8 x 32-bit |
| Address Registers | 8 x 32-bit (7 user + 1 SP) |
| بسته‌بندی | 68-PLCC (24.21 x 24.21 mm) |
| Process Technology | HCMOS (static CMOS) |
| Operating Voltage (Vcc) | 5 V |
| محدوده دمای کاری | -40C to +85C (industrial) |
| نوع نصب | Surface Mount (PLCC socket or PCB) |
| تعداد پین‌ها | 68 |
| Compliance | RoHS status varies by supplier lot - confirm with distributor |
| Lead-Free | Varies by manufacturer lot |
پیکربندی پین MC68HC000IEI16
| پین 1 | Vcc — Power supply +5V |
| پین 2 | A1 — Address line A1 |
| پین 3 | A2 — Address line A2 |
| پین 4 | A3 — Address line A3 |
| پین 5 | A4 — Address line A4 |
| پین 6 | A5 — Address line A5 |
| پین 7 | A6 — Address line A6 |
| پین 8 | A7 — Address line A7 |
| پین 9 | A8 — Address line A8 |
| پین 10 | A9 — Address line A9 |
| پین 11 | A10 — Address line A10 |
| پین 12 | A11 — Address line A11 |
| پین 13 | A12 — Address line A12 |
| پین 14 | A13 — Address line A13 |
| پین 15 | A14 — Address line A14 |
| پین 16 | A15 — Address line A15 |
| پین 17 | A16 — Address line A16 |
| پین 18 | A17 — Address line A17 |
| پین 19 | A18 — Address line A18 |
| پین 20 | A19 — Address line A19 |
| پین 21 | GND — Ground |
| پین 22 | A20 — Address line A20 |
| پین 23 | A21 — Address line A21 |
| پین 24 | A22 — Address line A22 |
| پین 25 | A23 — Address line A23 |
| پین 26 | GND — Ground |
| پین 27 | IPL0 — Interrupt priority level 0 |
| پین 28 | IPL1 — Interrupt priority level 1 |
| پین 29 | IPL2 — Interrupt priority level 2 |
| پین 30 | DTACK — Data transfer acknowledge (input) |
| پین 31 | Vcc — Power supply +5V |
| پین 32 | BR — Bus request |
| پین 33 | BG — Bus grant |
| پین 34 | BGACK — Bus grant acknowledge |
| پین 35 | CLK — Clock input |
| پین 36 | GND — Ground |
| پین 37 | HALT — Halt (input) |
| پین 38 | RESET — Reset (input, active low) |
| پین 39 | VMA — Valid memory address |
| پین 40 | E — Enable (clock output) |
| پین 41 | VPA — Valid peripheral address |
| پین 42 | BERR — Bus error (input) |
| پین 43 | FC0 — Function code 0 |
| پین 44 | FC1 — Function code 1 |
| پین 45 | FC2 — Function code 2 |
| پین 46 | A0 — Address line A0 |
| پین 47 | GND — Ground |
| پین 48 | D15 — Data line 15 (MSB) |
| پین 49 | D14 — Data line 14 |
| پین 50 | D13 — Data line 13 |
| پین 51 | D12 — Data line 12 |
| پین 52 | D11 — Data line 11 |
| پین 53 | D10 — Data line 10 |
| پین 54 | D9 — Data line 9 |
| پین 55 | D8 — Data line 8 |
| پین 56 | GND — Ground |
| پین 57 | D7 — Data line 7 |
| پین 58 | D6 — Data line 6 |
| پین 59 | D5 — Data line 5 |
| پین 60 | D4 — Data line 4 |
| پین 61 | D3 — Data line 3 |
| پین 62 | D2 — Data line 2 |
| پین 63 | D1 — Data line 1 |
| پین 64 | D0 — Data line 0 (LSB) |
| پین 65 | GND — Ground |
| پین 66 | R/W — Read/Write control |
| پین 67 | AS — Address strobe |
| پین 68 | Vcc — Power supply +5V |
کاربردهای معمول
MC68HC000IEI16 مناسب است برای 6 کاربردs: Industrial PLC Controllers, Telecom Line Cards and Switches, Medical Instrumentation and Imaging, Point-of-Sale Terminals and ATMs, Aerospace and Defense Embedded Systems, Legacy Industrial HMI and Operator Panels.
Industrial PLC Controllers
The MC68HC000IEI16 sits at the heart of legacy industrial PLC and machine controller boards where the M68000 ISA and 24-bit address bus are software-locked in installed bases. Its 16 MHz clock and 32-bit internal ALU scan ladder logic and motion trajectories in real time, while the 16-bit external data path halves memory cost versus a full 32-bit MPU. The HCMOS process lets the controller run in sealed cabinets from -40C to +85C without active cooling. Designers pair it with on-board SRAM for deterministic zero-wait-state execution and EPROM/Flash for firmware storage, supporting decades-long factory deployments where replacement is impractical.
پیشنهادی
Telecom Line Cards and Switches
Carrier-class telecom and legacy PBX line cards rely on the MC68HC000IEI16 for control-plane tasks such as call setup, signaling, and supervisory packet routing. The 16 MHz core services ISDN, POTS, and channel-bank interrupts faster than 8/16-bit MCUs of the same era, while the 24-bit address reaches 16 MB of dual-ported SRAM and Flash for routing tables. The static-CMOS HCMOS implementation survives brown-out and cold-swap conditions in central-office environments. Engineers often pair the MPU with E1/T1 framer ICs and HDLC controllers via the M6800 bus, exploiting the consistent DTACK hand-shake for deterministic DMA.
پیشنهادی
Medical Instrumentation and Imaging
FDA 510(k)-cleared medical devices using the M68000 family persist in hospitals and labs decades after first release, and the MC68HC000IEI16 preserves binary compatibility for embedded firmware updates. The 32-bit ALU executes DSP-style filter routines for ECG, pulse-oximeter, and ultrasound front-end processing at sufficient throughput for low-bandwidth modalities. The 68-PLCC package is socketed, enabling rapid board-level service and field replacement without firmware re-flashing. The wide operating voltage tolerance simplifies integration with rechargeable battery stacks, while the HCMOS low-standby current extends patient-portable runtime.
پیشنهادی
Point-of-Sale Terminals and ATMs
Long-life point-of-sale terminals and ATM control boards favor the MC68HC000IEI16 for its deterministic bus and 32-bit registers, which ease encryption-stack and EMV transaction logic. The 16 MHz core runs ISO 8583 messaging, PIN-pad handshakes, and TCP/IP stacks over the external 16-bit data bus with deterministic DTACK wait-state insertion. Socketed 68-PLCC packaging allows field-swappable units without firmware loss. NXP's industrial temperature range (-40C to +85C) and HCMOS process meet the wide thermal envelope and long uptime demanded by merchant terminals.
پیشنهادی
Aerospace and Defense Embedded Systems
Military and avionics retrofits frequently rely on the MC68HC000IEI16 because of its M68000 software heritage and access to MIL-STD-883B screened variants. The 16 MHz clock executes flight-control loops, navigation filters, and MIL-STD-1553 bus management within the timing margins required for unmanned platforms. The 24-bit address covers 16 MB of radiation-aware SRAM and PROM firmware, while the wide temperature window and HCMOS radiation behavior meet aerospace qualification goals. Designers combine it with MIL-1553 transceivers and cockpit display drivers over the deterministic M6800 bus.
پیشنهادی
Legacy Industrial HMI and Operator Panels
Operator panels and human-machine interface (HMI) workstations in factories still rely on the MC68HC000IEI16 to drive monochrome and color LCDs via companions like the MC6845. The 32-bit internal ALU keeps touchscreen, soft-key, and recipe-management code running smoothly at 16 MHz, while the 16-bit external bus minimizes display-buffer memory cost. The HCMOS process supports battery-backed RTC and brown-out-safe operation in unattended enclosures, and the socketed 68-PLCC simplifies field maintenance. Engineers extend the design with key-scan controllers and serial I/O for PLC backplane connectivity.
پیشنهادی
خلاصه محصولات پیشنهادی
داده‌های مرجع مهندسی برای MC68HC000IEI16 — مقایسه، راهنمای طراحی و اطلاعات انطباق.
راهنمای انتخاب
مقایسه با جایگزین‌ها
| پارامتر | این محصول | MC68HC000IEI10 | MC68HC000IEI20 | MC68HC000FN16 | MC68HC001IEI16 | MC68EC000IEI16 |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 68-PLCC (24.21 x 24.21 mm) | 68-PLCC - same | 68-PLCC - same | 68-PLCC - same | 68-PLCC - same | 68-PLCC - same |
| Maximum Clock Frequency | 16 MHz | 10 MHz | 20 MHz | 16 MHz | 16 MHz | 16 MHz |
| Data Bus Width | 16-bit external | 16-bit | 16-bit | 16-bit | 16-bit | 16-bit |
| Address Bus Width | 24-bit | 24-bit | 24-bit | 24-bit | 24-bit | 24-bit |
| Architecture | M68000 / HCMOS | M68000 / HCMOS | M68000 / HCMOS | M68000 / HCMOS | M68000 / HCMOS + onboard clock | M68000 / EC variant |
| Operating Voltage | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V |
| Drop-in Replacement | Reference part | Yes - drop-in (lower speed) | Yes - drop-in (higher speed) | Yes - drop-in (alternate package code) | Yes - drop-in (integrated clock) | Yes - drop-in (low-power) |
تفاوت‌های کلیدی
- Stable industrial pricing and supply (در مقابلMC68HC000IEI10)
- Clockless burn-in stress screen vs lower-grade lots (در مقابلMC68HC001IEI16)
- Full 32-bit programming model with HCMOS efficiency (در مقابلMC68000 (legacy NMOS))
یادداشت‌های طراحی
HCMOS MC68HC000IEI16 dissipates roughly 200-300 mW active at 16 MHz with a 5 V supply. Use bulk decoupling of 10-22 uF tantalum plus 0.1 uF ceramic per Vcc/GND pair. Add a reset supervisor (e.g., MC3406 / equivalent) to avoid undefined bus cycles on power-up - without a watchdog, transient brown-outs can leave the MPU in an indeterminate state.
Place the 68-PLCC socketed footprint so the 24.21 x 24.21 mm clearance allows heatsink-less operation in still air. Keep address/data traces under 50 mm with 50 ohm characteristic impedance to avoid ringing. Connect DTACK pull-up to Vcc with 4.7 kohm and route it away from CLK to prevent double-clocking. Add a ground plane under the MPU region to control EMI on the bus.
Avoid driving DTACK from an MC68881/MC68882 coprocessor without proper handshake - asynchronous DTACK glitches can cause spurious memory access cycles. The HALT pin is an input only in this part: do not connect it directly to RESET, and do not leave IPL0-IPL2 floating (tie to Vcc through 4.7 kohm for inactive encoding 7). Confirm PLCC socketing direction before the first power-up to avoid reversed-assembly damage.
Estimated: at 16 MHz the M68000 bus issues one cycle every 250 ns; trace delays above 5 ns round-trip can cause AS/DTACK setup violations. Use series 33 ohm damping on CLK and AS lines, keep data bus byte lanes matched within 5 mm, and add 10 kohm pull-ups on unused FC0/FC1/FC2 pins to keep function codes stable. These choices preserve signal integrity for decades of in-field operation.
M6800 bus signals A1-A23 and D0-D15 require matched trace lengths for reliable operation. Use a 16-bit bus multiplexer scheme for 32-bit SRAM upgrades. Maintain DTACK propagation delay below 50 ns to avoid spurious wait-state insertion. Add a bus arbiter (e.g., MC68451) for any DMA-capable peripheral such as the MC68882.
اطلاعات انطباق
Distributor listings (DigiKey 1166007) do not expose compliance attributes in the snippet; confirm RoHS/lead-free status with the supplier lot at quote time. No AEC-Q100 qualification - this MPU is intended for industrial, not automotive.
