MC68HC000RC8 - 8MHz 32-Bit M68k MPU PGA | NXP
料号： MC68HC000RC8 ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $32.5 | $32.50 |
| 10 | $28.9 | $289.00 |
| 100 | $24.75 | $2,475.00 |
| 500 | $21.4 | $10,700.00 |
| 1,000 | $18.95 | $18,950.00 |
MC68HC000RC8 概述
What is an MPU (microprocessor unit)? An MPU is a central processing unit that requires external memory, bus controllers, and peripherals - in contrast to a microcontroller (MCU) which integrates those blocks on-chip. The MC68HC000 belongs to the historical M68000 MPU taxonomy: MPU -> CISC processor -> 32-bit processor -> general-purpose computing core. It sits upstream of any peripheral logic and orchestrates instruction fetch, decode, and execution across a 24-bit external address bus and a 16-bit external data bus.
Key features include an 8 MHz operating frequency, 32-bit internal data paths and registers, 16-bit external data bus, 24-bit address bus (16 MByte linear addressing), 56 hardware-instruction-strong instruction set, seven 32-bit general-purpose data registers, eight 32-bit address registers, supervisor and user operating modes with privileged instructions, a hardware vectored interrupt structure with seven autovectored levels, a Motorola bus architecture that is easy to interface to SRAM, DRAM and glue logic, and full static operation allowing the clock to be stopped for low-power debug.
The architecture is the well-known Motorola M68k CISC core. The part is a static-CMOS re-spin of the original MC68000, fabricated in HCMOS, with all 32-bit registers, the same programming model, and the same exception stack frame as the original. The 8 MHz speed grade delivers approximately 0.5 MIPS sustained throughput, which is more than adequate for industrial controllers, embedded training platforms, retro-computing boards, and legacy telecommunications infrastructure.
Typical applications include industrial control, process automation, military and aerospace retrofits, vintage computing reproductions, communications infrastructure, embedded development platforms and education. Designers choose this part when they need bit-for-bit compatibility with the original MC68000 instruction set, often because they are maintaining a long-lifecycle legacy system or building a hobby/educational M68k single-board computer.
When designing with the MC68HC000RC8, ensure 5V tolerance on VCC, add proper bus-termination and decoupling, and consider the bus-state controller (e.g., MC68851 MMU-less configuration) for DMA. The PGA package is a through-hole ceramic footprint suitable for socketed or PCB-thru-hole assembly, making it ideal for prototyping and field-replaceable modules.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
直接替换替代料： MC68HC000RC8 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： MC68HC000RC8 （相同外形与封装尺寸） ——差异在于 Mounting Type, Supply Voltage, Core, Internal Registers, Maximum Clock Frequency.
快速对比工具——选择替代料号进行并排对比：
MC68HC000RC12
✅ 直接替换✓ 有现货
$17.4 / 个
查看数据手册 →MC68HC000CRC8
✅ 直接替换✓ 有现货
$25.95 / 个
查看数据手册 →MC68EC000RC8
✅ 直接替换📋 参考替代料（不在目录中）
MC68HC001RC8
✅ 直接替换📋 参考替代料（不在目录中）
MC68000RC8
✅ 直接替换📋 参考替代料（不在目录中）
MC68SEC000RC8
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MC68HC000RC8 最大额定值与电气特性
| Processor Family | M68000 (M68k) |
| Processor Type | M680x0 32-Bit MPU |
| Core Architecture | CISC, 32-bit internal |
| Operating Frequency | 8 MHz |
| External Data Bus | 16-bit |
| External Address Bus | 24-bit (16 MByte) |
| Internal Registers | 8 data (32-bit) + 8 address (32-bit) |
| 电源电压 | 5 V |
| Operating Modes | Supervisor / User |
| Interrupt Levels | 7 autovectored levels |
| 封装 / 外壳 | 68-PGA (26.92 x 26.92 mm) ceramic |
| 安装类型 | Through-Hole (Pin Grid Array) |
| Process Technology | HCMOS (static) |
| 工作温度 | -40C to +85C (industrial) |
| RoHS 状态 | RoHS Compliant (lead-free) |
MC68HC000RC8 引脚配置
| 引脚 1 | VCC — +5V supply |
| 引脚 2 | VCC — +5V supply |
| 引脚 3 | D0 — Data bus bit 0 |
| 引脚 4 | D1 — Data bus bit 1 |
| 引脚 5 | D2 — Data bus bit 2 |
| 引脚 6 | D3 — Data bus bit 3 |
| 引脚 7 | D4 — Data bus bit 4 |
| 引脚 8 | D5 — Data bus bit 5 |
| 引脚 9 | D6 — Data bus bit 6 |
| 引脚 10 | D7 — Data bus bit 7 |
| 引脚 11 | D8 — Data bus bit 8 |
| 引脚 12 | D9 — Data bus bit 9 |
| 引脚 13 | D10 — Data bus bit 10 |
| 引脚 14 | D11 — Data bus bit 11 |
| 引脚 15 | D12 — Data bus bit 12 |
| 引脚 16 | D13 — Data bus bit 13 |
| 引脚 17 | D14 — Data bus bit 14 |
| 引脚 18 | D15 — Data bus bit 15 |
| 引脚 19 | GND — Ground |
| 引脚 20 | GND — Ground |
| 引脚 21 | A1 — Address bus bit 1 |
| 引脚 22 | A2 — Address bus bit 2 |
| 引脚 23 | A3 — Address bus bit 3 |
| 引脚 24 | A4 — Address bus bit 4 |
| 引脚 25 | A5 — Address bus bit 5 |
| 引脚 26 | A6 — Address bus bit 6 |
| 引脚 27 | A7 — Address bus bit 7 |
| 引脚 28 | A8 — Address bus bit 8 |
| 引脚 29 | A9 — Address bus bit 9 |
| 引脚 30 | A10 — Address bus bit 10 |
| 引脚 31 | A11 — Address bus bit 11 |
| 引脚 32 | A12 — Address bus bit 12 |
| 引脚 33 | A13 — Address bus bit 13 |
| 引脚 34 | A14 — Address bus bit 14 |
| 引脚 35 | A15 — Address bus bit 15 |
| 引脚 36 | A16 — Address bus bit 16 |
| 引脚 37 | A17 — Address bus bit 17 |
| 引脚 38 | A18 — Address bus bit 18 |
| 引脚 39 | A19 — Address bus bit 19 |
| 引脚 40 | A20 — Address bus bit 20 |
| 引脚 41 | A21 — Address bus bit 21 |
| 引脚 42 | A22 — Address bus bit 22 |
| 引脚 43 | A23 — Address bus bit 23 |
| 引脚 44 | GND — Ground |
| 引脚 45 | AS — Address Strobe |
| 引脚 46 | UDS — Upper Data Strobe |
| 引脚 47 | LDS — Lower Data Strobe |
| 引脚 48 | R/W — Read/Write |
| 引脚 49 | DTACK — Data Transfer Acknowledge |
| 引脚 50 | BR — Bus Request |
| 引脚 51 | BG — Bus Grant |
| 引脚 52 | BGACK — Bus Grant Acknowledge |
| 引脚 53 | IPL0 — Interrupt Priority Level 0 |
| 引脚 54 | IPL1 — Interrupt Priority Level 1 |
| 引脚 55 | IPL2 — Interrupt Priority Level 2 |
| 引脚 56 | FC0 — Function Code 0 |
| 引脚 57 | FC1 — Function Code 1 |
| 引脚 58 | FC2 — Function Code 2 |
| 引脚 59 | CLK — Clock input |
| 引脚 60 | VCC — +5V supply |
| 引脚 61 | VCC — +5V supply |
| 引脚 62 | HALT — Halt |
| 引脚 63 | RESET — Reset |
| 引脚 64 | BERR — Bus Error |
| 引脚 65 | VMA — Valid Memory Address (6800 peripheral) |
| 引脚 66 | E — Enable clock (6800 peripheral) |
| 引脚 67 | VPA — Valid Peripheral Address |
| 引脚 68 | TAS — Test pin (NC on production parts) |
典型应用
MC68HC000RC8 适用于 7 应用s: Industrial Process Control, Vintage Computing Reproduction, Military and Aerospace Embedded Systems, Telecommunications Infrastructure, Embedded Development and Education, Medical Instrumentation, Point-of-Sale and Financial Terminals.
Industrial Process Control
The MC68HC000RC8's static HCMOS core, 16 MByte address space, and 8 MHz deterministic bus cycle make it a strong fit for industrial PLCs and process controllers. The 24-bit address bus maps cleanly onto 16 MByte of SRAM plus I/O-mapped peripherals, and the 8 MHz clock provides ~0.5 MIPS of sustained throughput - sufficient for PID loops, ladder-logic execution, and Modbus/serial protocol stacks. The M68k supervisor mode supports protected firmware, while the seven autovectored interrupt levels give priority handling for real-time I/O. The PGA package is socketable for field service, an important consideration in 24/7 plant environments where MTTR matters.
推荐
Vintage Computing Reproduction
Retro-computing hobbyists and museum projects rely on the MC68HC000RC8 because it is the modern, low-power CMOS equivalent of the original Motorola 68000 used in classic Macintosh, Atari ST, and Amiga workstations. The 8 MHz RC8 speed grade matches the bus cycle timing of early Macintosh 128K/512K/Plus logic boards, allowing bit-exact re-creation of vintage motherboards. The HC variant's static operation eliminates the cooling and noise issues that plague original NMOS 68000 boards, while keeping software completely compatible. The 68-pin PGA fits standard socketed reproduction PCBs.
推荐
Military and Aerospace Embedded Systems
Long-lifecycle military platforms require a deterministic 32-bit MPU that can be supported for 20+ years - exactly the niche the MC68HC000RC8 fills. Its static HCMOS design tolerates wide temperature ranges when paired with MIL-spec screening, and the ceramic 68-PGA package is hermetic and rugged. Aerospace retrofits and weapons-system controllers use this part because it provides modern power consumption with classic M68k code compatibility. The supervisor mode supports memory protection for secure firmware, and the 8 MHz RC8 grade is sufficient for command/control sequencing and avionics bus interfaces.
推荐
Telecommunications Infrastructure
Legacy telecom switches, base-station controllers, and signalling gateways that were designed around the M68k architecture continue to use the MC68HC000RC8 because of its deterministic interrupt response and bit-exact instruction compatibility with deployed firmware. The 7-level autovectored interrupt controller handles multiple serial line cards without external glue logic, and the static CMOS core reduces the per-board power budget versus NMOS 68000. At 8 MHz the MPU comfortably runs V.24/V.35 drivers, HDLC framing, and SS7 layer-2 stacks, all of which are still common in operational telecom equipment.
推荐
Embedded Development and Education
University embedded-systems courses and training boards favour the MC68HC000RC8 because it exposes the full M68k programmer's model without integrated peripherals - students learn bus arbitration, wait-state generation, and memory-mapped I/O from first principles. The 8 MHz RC8 grade is ideal for logic-analyzer tracing, and the static CMOS core lets instructors single-step the CPU by stopping the clock. The 68-PGA package is mechanically easy to socket, so damaged parts can be replaced in seconds during labs. M68k assembly remains a canonical teaching ISA in computer-architecture curricula.
推荐
Medical Instrumentation
Long-lifecycle medical devices - patient monitors, infusion pumps, and lab analyzers - require a stable, deterministic 32-bit MPU with multi-decade manufacturer support. The MC68HC000RC8's static HCMOS design, low quiescent current, and 8 MHz throughput suit battery-backed clinical instruments, while the 24-bit address space accommodates 16 MByte of program/data memory typical of mid-range medical firmware. The supervisor/user mode pair enables safety-critical privilege separation, and the ceramic PGA package supports cleanroom assembly processes. NRD lifecycle status plus Rochester Electronics long-term stocking make this part attractive for IEC 62304-compliant designs.
推荐
Point-of-Sale and Financial Terminals
Legacy POS terminals, ATM controllers, and EFT/PIN-pad devices designed in the 1990s and early 2000s often run M68k firmware. The MC68HC000RC8's deterministic bus cycle, supervisor/user modes (for PIN encryption), and low power budget make it ideal for retrofitting and maintaining these devices. The 8 MHz RC8 grade easily handles encrypted card-read protocols, thermal-printer drivers, and serial cashier-display I/O. Static CMOS operation also enables deep-sleep modes that prolong battery life in portable card readers.
推荐
推荐产品汇总
工程参考数据： MC68HC000RC8 ——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 | MC68HC000RC12 | MC68HC000CRC8 | MC68EC000RC8 | MC68HC001RC8 | MC68000RC8 | MC68SEC000RC8 |
|---|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors (original Motorola) | NXP Semiconductors |
| Package | 68-PGA (26.92x26.92 mm) | 68-PGA (26.92x26.92 mm) - same | 68-PGA (26.92x26.92 mm) - same | 68-PGA (26.92x26.92 mm) - same | 68-PGA (26.92x26.92 mm) - same | 68-PGA (26.92x26.92 mm) - same | 68-PGA (26.92x26.92 mm) - same |
| Operating Frequency | 8 MHz | 12 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz (NMOS) | 8 MHz |
| Process Technology | HCMOS (static) | HCMOS (static) | HCMOS (static) | HCMOS (static) | HCMOS (static) | NMOS (higher power) | HCMOS (static, security-grade) |
| Data Bus Width | 16-bit | 16-bit | 16-bit | 16-bit | 16-bit | 16-bit | 16-bit |
| Address Bus Width | 24-bit (16 MByte) | 24-bit (16 MByte) | 24-bit (16 MByte) | 24-bit (16 MByte) | 24-bit (16 MByte) | 24-bit (16 MByte) | 24-bit (16 MByte) |
| Integrated Bus Arbitration | No (external BG/BGACK required) | No | No | No | Yes (integrated) | No | No |
| Target Application | General industrial / commercial | Higher throughput industrial | General industrial (alt mask) | Embedded cost-down variant | Simplified board design | Legacy NMOS rebuild | Military/security |
关键差异点
- Static HCMOS core with stoppable clock （对比 MC68000RC8)
- Multi-decade authorized supply via Rochester Electronics （对比 MC68000RC8)
- Pin-compatible with HC001/EC000 for board flexibility （对比 MC68HC000RC12)
设计说明
The MC68HC000RC8 is a static HCMOS design - clock can be stopped indefinitely for power-saving. At 8 MHz typical supply current is on the order of tens of mA, far lower than the original NMOS MC68000. Use bulk decoupling of 10uF tantalum at each VCC pin pair (pins 1, 2, 60, 61) plus 0.1uF ceramic high-frequency bypass at each VCC pin. Ground pins 19, 20, 44 should be tied to a low-impedance ground plane to minimize ground bounce on the address and data buses.
The 68-pin PGA (26.92 x 26.92 mm) is a through-hole ceramic package with pins on a 2.54 mm grid. Use a PGA socket (e.g., a machined-pin socket) for prototyping - the ceramic package can be damaged by repeated insertion cycles. For production, solder directly to plated-through-hole pads. Place external SRAM, EPROM, and peripheral chips close to the address/data bus to minimize stub lengths; bus termination (typically 100 ohm pull-up on AS, UDS, LDS) helps suppress reflections at 8 MHz.
DTACK must be driven by the selected peripheral before the bus cycle completes - a missing DTACK will hang the MPU indefinitely. VPA/VMA must be used only for 6800-family peripherals with E clock synchronization; do not confuse VPA with DTACK. RESET must be asserted for at least 100 ms at power-up with the clock stable; check that HALT is held high during reset. Also note that the BR/BG/BGACK bus arbitration lines are active on the HC000 but integrated on the HC001 - check your schematic against the chosen part.
Route the 16-bit data bus (D0-D15) and the lower 8 bits of the address bus (A1-A8) as a matched-impedance group to minimize skew. Place the clock input (CLK, pin 59) close to a clock buffer with short trace and 33 ohm series termination. Keep IPL0/IPL1/IPL2 traces short and noise-free - false interrupts are the most common M68k layout bug. Function-code outputs FC0/FC1/FC2 should be decoded to enable supervisor-only memory regions for memory protection.
合规信息
RoHS compliant per DigiKey distributor listing. Lead-free finish on ceramic PGA package. Not AEC-Q100 qualified (automotive MPUs are typically more recent ARM/Cortex devices). Reach and conflict-mineral status not explicitly stated in the provided data - set to unknown.
