MC68HC000CRC8 - 8MHz 32-Bit M68k MPU PGA68 | NXP / Motorola
料号： MC68HC000CRC8 ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $39.5 | $39.50 |
| 10 | $35.2 | $352.00 |
| 100 | $31.85 | $3,185.00 |
| 250 | $28.4 | $7,100.00 |
| 500 | $25.95 | $12,975.00 |
MC68HC000CRC8 概述
A microprocessor (MPU) is the central processing unit of a computer system, executing instructions fetched from memory and orchestrating data movement between peripherals. The MC68HC000 belongs to the CISC (Complex Instruction Set Computer) microprocessor family, within the broader hierarchy of microcontrollers and microprocessors, then to processors and finally to digital semiconductors. Synonymous terms include CPU, central processor, and processor IC. As a member of the M68000 family of 16/32-bit processors, it sits alongside the original MC68000 (NMOS), the low-power MC68HC000 (HCMOS), the bus-compatible MC68HC001, and the reduced-pin-count MC68EC000.
Key features include 8 MHz maximum CPU clock, 5 V single-supply operation, 32-bit internal architecture, 16-bit external data bus, 24-bit address space (16 MB), vectored interrupt controller supporting seven autovector levels plus 192 software vectors, and on-chip bus arbitration for systems with multiple bus masters. The HCMOS implementation cuts power consumption relative to the original NMOS MC68000 by roughly an order of magnitude while preserving object-code compatibility.
Typical applications include legacy industrial controllers, educational single-board computers, retro-computing platforms, telecom switching hardware, and avionics upgrades. The wide software base (Unix-like systems, real-time executives, custom firmware) and broad support ecosystem keep the part relevant for long-life-cycle equipment. When designing with the MC68HC000CRC8, place bulk decoupling capacitors near each VCC/GND pair and provide clean 5 V power to ensure clock integrity; a slow rise on VCC can cause undefined CPU state at power-up, so a proper reset supervisor is recommended.
直接替换替代料： MC68HC000CRC8 ——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： MC68HC000CRC8 （相同外形与封装尺寸） ——差异在于 Mounting Type, Package, Supply Voltage, Address Bus Width, Core.
快速对比工具——选择替代料号进行并排对比：
MC68HC000RC8
✅ 直接替换✓ 有现货
$18.95 / 个
查看数据手册 →MC68HC000RC10
✅ 直接替换📋 参考替代料（不在目录中）
MC68HC000RC12
✅ 直接替换✓ 有现货
$17.4 / 个
查看数据手册 →MC68000RC8
✅ 直接替换📋 参考替代料（不在目录中）
MC68HC000CRC10
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MC68HC000CRC8 最大额定值与电气特性
| Manufacturer | NXP Semiconductors (formerly Motorola / Freescale) |
| Product Family | M68000 (M68k) |
| Core | M68000, 1 core |
| Architecture | CISC, 16-bit external data bus / 32-bit internal |
| Data Width | 32-bit (internal), 16-bit (external) |
| Address Width | 24-bit (16 MB external address space) |
| 最大时钟频率 | 8 MHz |
| 电源电压 | 5 V +/- 5% |
| Technology | Static HCMOS |
| 封装 | 68-pin PGA / CPGA-68 (26.92 x 26.92 mm) |
| 安装类型 | Through-Hole |
| 工作温度 | -40 C to +85 C (industrial) |
| Interrupt Controller | Yes - 7 autovector + 192 software vectors |
| Bus Arbitration | Yes - on-chip |
| Instruction Set Compatibility | M68k, object-code compatible with MC68000 |
| RoHS 状态 | Non-compliant (ceramic PGA) |
| Lead-Free | Contains lead (ceramic package) |
MC68HC000CRC8 68-pin pga / cpga-68 (26.92 x 26.92 mm) 引脚配置指南
MC68HC000CRC8（68-pin pga / cpga-68 (26.92 x 26.92 mm) 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： MC68HC000CRC8.
请参阅 数据手册 以查看完整引脚配置。
典型应用
MC68HC000CRC8 适用于 6 应用s: Legacy Industrial Controllers, Educational Single-Board Computers, Retro-Computing and Emulation Platforms, Telecommunications Switching Hardware, Avionics and Defense Long-Life Programs, Test and Measurement Instrumentation.
Legacy Industrial Controllers
The MC68HC000CRC8 remains a workhorse in long-life industrial control systems where re-validation costs make platform swaps prohibitive. Its 8 MHz throughput and M68k instruction set comfortably handle PLC scan loops, HMI state machines, and serial-protocol bridges for Modbus / DF1. The HCMOS static core allows clock-stop power saving in battery-backed installations, while the 68-pin ceramic PGA socket enables field replacement with no soldering. Vectored interrupts (7 autovector + 192 software vectors) simplify the response to time-critical sensor inputs without external controller glue logic. The industrial -40 C to +85 C temperature range plus ceramic-package robustness meet factory-floor reliability targets.
推荐
Educational Single-Board Computers
Single-board computer kits and university embedded-systems curricula continue to use the MC68HC000CRC8 because the M68k architecture is widely taught, well documented, and forgiving of mistakes. The 16 MB address space provides ample room for student code, monitor ROM, and memory-mapped peripherals, while the 16-bit external bus keeps DRAM requirements manageable. The on-chip interrupt controller and bus arbitration simplify lab designs, allowing students to focus on software without external glue logic. Low-volume / hobby pricing remains accessible through distributors like Rochester Electronics and surplus channels.
推荐
Retro-Computing and Emulation Platforms
The MC68HC000CRC8 powers several well-known retro-computing platforms, including simplified Macintosh clones, Amiga-style workstations, and Atari ST descendants. Hobbyists value the ceramic PGA for its authentic look, full M68k instruction compatibility, and ability to run period-correct operating systems (classic Mac OS, Atari TOS, early Unix). Static HCMOS operation simplifies clock-throttling experiments, and the 8 MHz speed grade matches original 1980s-era systems. Through-hole PGA sockets also support hot-swap experimentation impossible with modern fine-pitch QFP packages.
推荐
Telecommunications Switching Hardware
Telecom switching systems deployed in the 1990s frequently use the MC68HC000CRC8 as a control-plane processor, where its object-code compatibility with the M68000 family allows software reuse across product generations. The integrated bus arbitration lets multiple MPUs share a common backplane without external arbiters, simplifying PCB layout in multi-slot chassis. The vectored interrupt controller rapidly services TDM time-slot events, while the 24-bit address bus provides 16 MB of code/data space for protocol stacks. Long-term availability through authorized stockists like Rochester Electronics supports decades-long service contracts.
推荐
Avionics and Defense Long-Life Programs
Avionics, military, and defense programs requiring 20-30 year lifecycle support use the MC68HC000CRC8 because of its ceramic PGA package robustness, hermetic sealing, and qualified MIL-spec temperature grades. The static HCMOS core tolerates the wide temperature and vibration profiles of military platforms, and the M68k architecture is one of the few 32-bit ISAs certified in legacy defense equipment. The 68-pin PGA form factor enables socketed installation for rapid module swap in field-deployed systems. Authorized-stock distributors provide full traceability for lot date codes, which defense procurement requires.
推荐
Test and Measurement Instrumentation
The MC68HC000CRC8 finds a home in mid-1990s-era bench instruments, oscilloscopes, logic analyzers, and protocol testers where a 32-bit control processor manages the user interface, GPIB / RS-232 communications, and signal-processing coprocessor hand-off. The M68k instruction set simplifies porting control code from earlier generation MC68000 designs, while the static HCMOS core allows low-power standby when the front-panel buttons are idle. The 16-bit external data bus keeps memory-subsystem cost down relative to true 32-bit alternatives, while the 24-bit address space provides headroom for waveform buffers.
推荐
推荐产品汇总
工程参考数据： MC68HC000CRC8 ——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 | MC68HC000RC8 | MC68HC000RC10 | MC68HC000RC12 | MC68000RC8 | MC68HC000CRC10 |
|---|---|---|---|---|---|---|
| Package | 68-pin ceramic PGA (26.92 x 26.92 mm) | 68-pin PGA - same | 68-pin PGA - same | 68-pin PGA - same | 68-pin PGA - same | 68-pin PGA - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors (formerly Motorola) | NXP Semiconductors |
| Maximum Clock Frequency | 8 MHz | 8 MHz | 10 MHz | 12 MHz | 8 MHz | 10 MHz |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V |
| Architecture / Process | HCMOS static | HCMOS static | HCMOS static | HCMOS static | NMOS (non-static) | HCMOS static |
| Address Space | 16 MB (24-bit bus) | 16 MB | 16 MB | 16 MB | 16 MB | 16 MB |
| External Data Bus Width | 16-bit | 16-bit | 16-bit | 16-bit | 16-bit | 16-bit |
| Interrupt Controller | On-chip, 7 autovector + 192 software vectors | Same on-chip controller | Same on-chip controller | Same on-chip controller | Same on-chip controller | Same on-chip controller |
| RoHS Status | Non-compliant (ceramic) | Non-compliant (ceramic) | Non-compliant (ceramic) | Non-compliant (ceramic) | Non-compliant (ceramic) | Non-compliant (ceramic) |
关键差异点
- Object-code compatibility with the entire M68k family （对比 MC68HC001EI8)
- Static HCMOS core allows clock-stop power saving （对比 MC68000RC8)
- Ceramic PGA package provides hermetic sealing and field-replaceability （对比 MC68HC000RC8)
设计说明
The MC68HC000CRC8 draws up to approximately 50 mA active at 8 MHz with 5 V VCC; the HCMOS static core allows the clock to be halted for power-saving standby mode. Provide local 0.1 uF + 10 uF decoupling near each VCC pin pair on the ceramic PGA footprint - the package has 4 VCC pins and 4 GND pins distributed around the die. A slow-rising or noisy VCC rail can leave the CPU in an undefined state; a power-on reset supervisor (such as the MC34064 / MC33064) is recommended to assert RESET until VCC reaches 4.75 V with a clean clock.
The 68-pin PGA lands on a 26.92 x 26.92 mm through-hole footprint with pins on a 2.54 mm (0.100 in) grid. Use a PGA socket (e.g. screw-machined or precision-pin) for field-replaceable assemblies; pin insertion force is non-trivial so use an IC insertion tool to avoid bent pins. Provide wide VCC and GND planes on inner PCB layers, and keep the 16-bit data bus / 24-bit address bus traces matched within 1 inch of the MPU to avoid bus-timing skew at 8 MHz. Although 8 MHz is forgiving, M68k bus cycle timing is sensitive to signal integrity on AS, DS, and R/W.
Do not connect the ceramic PGA package to ground-only chassis grounds; use a star-ground topology that ties chassis GND to logic GND at the power supply entry point to avoid ground loops. The M68k FC0-FC2 outputs identify user/supervisor program and data accesses; many peripheral decoders rely on these lines and must be sampled to ensure proper supervisor-data access routing. The HALT and BUSERR signals are active inputs to the CPU - if BUSERR is unused, tie it high through a pull-up to VCC to prevent spurious error exceptions. Avoid using the part outside its specified -40 C to +85 C industrial window without thermal qualification.
合规信息
Ceramic PGA package contains lead (Pb); not RoHS-compliant per EU Directive 2011/65/EU. Reach compliance status confirmed by NXP / Freescale legacy statements. AEC-Q100 not applicable - this is a microprocessor, not an automotive-grade IC. Conflict-minerals reporting compliant per NXP CMRT filings.
