MC68020CEH16E - 32-Bit M68020 MPU, 16.67MHz | NXP 132-PQFP
MPN: MC68020CEH16E ✗ Tapus ng BuhayMC68020CEH16E Ulas
What is a CISC MPU? A CISC microprocessor (Complex Instruction Set Computer) is a processor architecture that exposes a rich, variable-length instruction set optimized for high-level language constructs and minimal code size. The MC68020 occupies the hypernym path microprocessor -> CISC processor -> 32-bit MPU -> M680x0 family -> M68K application context. It served as the architectural backbone for the Apple Macintosh II series, Sun-3 workstations, HP 9000/300 and 9000/400 systems, early NeXT computers, and embedded military/aerospace platforms.
Key features include a 32-bit non-multiplexed external data bus with 32-bit address bus, dynamic bus sizing for 8/16/32-bit peripherals, on-chip 256-byte instruction cache, an integrated MMU with 4-Kbyte entries, hardware multiply and divide (32x32 in 40 cycles typical), seven-level interrupt structure with vectored autovector support, and a coprocessor interface for the MC68881/MC68882 floating-point units. The device operates from a single 5 V supply and supports industrial temperature grades.
The 132-pin PQFP package provides a generous thermal envelope for legacy embedded systems. Designers must provide external clock generation (typically a 16.67 MHz fundamental-mode TTL oscillator) and bus-termination networks. Modern embedded designs migrate to ColdFire MCF5208 or MPC5xx family successors; the MC68020CEH16E remains in service for avionics retrofits, industrial PLCs, and long-lifecycle defense electronics where M68K software re-validation is cost-prohibitive.
Typical applications include avionics flight-control retrofits, legacy UNIX workstation mainboards, VMEbus single-board computers, industrial CNC controllers, and military communications equipment. Its MMU and full 32-bit architecture made it the first mainstream MPU capable of running virtual-memory UNIX operating systems.
Mga alternatibo na pwedeng ilagay na MC68020CEH16E — parehas na package, pin-to-pin na katugmang. Hindi kasama ang mga bahagi ng iba't-ibang package na nangangailangan ng pagpapaayos ng PCB.
MC68020CEH16E
✅ Drop-InMagkontak para sa presyo
Tingnan ang Datasheet →MC68030CEH16E
✅ Drop-In ⚠️ Mga Talaan Hindi Naiwerikmo📋 Alternatibo na Reference (hindi sa katalogo)
MC68SEC000AEI16
✅ Drop-In ⚠️ Mga Talaan Hindi Naiwerikmo📋 Alternatibo na Reference (hindi sa katalogo)
MC68020CEH16E Mga Pinakamataas na Rating at Electrical Characteristics
| Product Type | 32-Bit CISC Microprocessor (MPU) |
| Processor Family | M680x0 (M68K) |
| Core Architecture | MC68020 |
| Number of Cores | 1 |
| Width ng Data Bus | 32-bit (dynamic bus sizing 8/16/32) |
| Address Bus Width | 32-bit |
| Maksimum na Taktiko ng Oras | 16.67 MHz |
| Instruction Cache | 256 bytes on-chip |
| MMU | Yes, integrated with 4-Kbyte TLB |
| Supply Voltage na Operasyon | 5 V |
| Packhaging | 132-pin PQFP (QFP-132, 46x46 mm, bumpered) |
| Uri ng Pagpapasok | Surface Mount |
| Coprocessor Interface | Yes (MC68881/MC68882 FPU) |
| Interrupt Levels | 7 (with vectored autovector) |
| Tindminan RoHS | RoHS Compliant |
| Lead-Free Status | Lead Free |
Gabay sa Pin Configuration ng MC68020CEH16E 132-pin pqfp (qfp-132, 46x46 mm, bumpered)
Pin configuration para sa MC68020CEH16E (132-pin pqfp (qfp-132, 46x46 mm, bumpered) package). Kasama sa digital IC na ito ang GPIO, mga communication interface (UART, SPI, I2C), at mga power pin. Sumangguni sa datasheet ng manufacturer para sa mga alternatibong function ng pin at mga opsyon sa configuration. Mahalaga para sa disenyo ng embedded system at PCB layout.
Wala ng detalyadong pinout data na magagamit para sa MC68020CEH16E.
Sumangguni sa datasheet para sa buong pin configuration.
Tipikal na mga Gamit
MC68020CEH16E ay nararapat para sa 6 aplikasyons: Avionics Flight-Control Retrofits, VMEbus Single-Board Computers, Legacy UNIX Workstation Mainboards, Industrial CNC Controllers, Military Communications Equipment, Embedded Real-Time Control.
Avionics Flight-Control Retrofits
The MC68020CEH16E is widely deployed in legacy military and commercial avionics flight-control computers where the original M68K software base is certified and re-validation cost dominates the design budget. Its integrated MMU with 4-Kbyte TLB enables virtual-memory partitioning required by DO-178C DAL-B software, while the 16.67 MHz clock provides sufficient throughput for sensor fusion and actuator-loop control at 50-100 Hz update rates. Drop-in replacement of failed modules is critical, so the bumpered PQFP-132 package with its robust mechanical lead-frame is favored over fine-pitch alternatives.
Inirekomenda
VMEbus Single-Board Computers
The MC68020CEH16E powered the first generation of commercial VMEbus single-board computers (SBCs) used in industrial automation, scientific instrumentation, and defense telemetry. Its 32-bit non-multiplexed address/data bus with dynamic bus sizing natively interfaces VMEbus D16/D32 master controllers, while the integrated MMU allowed UNIX System V and VxWorks to run multi-process control software on a 16.67 MHz core. VME ecosystems remain supported because the installed base of M68K VME systems exceeds one million units worldwide.
Inirekomenda
Legacy UNIX Workstation Mainboards
The MC68020CEH16E drove the mainboards of Sun-3/50, Sun-3/60, HP 9000/360, and early NeXT workstation lines, where the integrated MMU was the minimum required to run SunOS, HP-UX, and NeXTSTEP virtual-memory UNIX variants. At 16.67 MHz with the MC68881 FPU attached, the platform delivered 1-2 MIPS integer throughput plus 0.5 MFLOPS double-precision, sufficient for early 1980s CAD, document preparation, and compiler workloads. Restorers and museum-grade retrocomputing projects source new-old-stock MC68020CEH16E silicon through distributors like Rochester Electronics.
Inirekomenda
Industrial CNC Controllers
The MC68020CEH16E was the CPU in 1980s-vintage industrial CNC controllers from Allen-Bradley, Fanuc, Siemens, and Heidenhain, where its deterministic interrupt structure (7 IPL levels with vectored autovector) and 32-bit ALU suited real-time motion-control loops. The 256-byte on-chip instruction cache reduced bus contention on the shared machine-tool backplane, while dynamic bus sizing allowed mixed 8-bit serial I/O and 32-bit motion-DAC peripherals on the same address space. Long-lifecycle CNC platforms continue to demand factory-original or drop-in compatible silicon for 30+ year service contracts.
Inirekomenda
Military Communications Equipment
The MC68020CEH16E powers tactical radio, signal-intelligence, and electronic-warfare systems deployed in the 1980s-1990s and still in service today. Its radiation-tolerant variants (specified via the 'CEH' industrial grade and screened equivalents) withstand MIL-STD-810 environmental stress, and the integrated MMU allows partitioned secure/red-black memory domains required for cryptographic cross-domain solutions. The bumpered PQFP-132 mechanical package provides lead-frame compliance for shock/vibration profiles encountered in vehicular and airborne platforms.
Inirekomenda
Embedded Real-Time Control
Beyond MME-class applications, the MC68020CEH16E serves in custom real-time control platforms where M68K assembly legacy, low-cost M68K toolchains, and proven long-term silicon availability outweigh the preference for newer ColdFire or ARM cores. The device's seven-level prioritized interrupt structure with vectored autovector and hardware multiply/divide (32x32 in 40 cycles typical) make it suited to motor-control, power-electronics, and process-control applications. Designers in long-lifecycle defense programs may still select the MC68020CEH16E to align with existing firmware baselines and certifications.
Inirekomenda
Buod ng mga Inirekomendang Produkto
Impormasyon ng Talumpati sa Engineering for MC68020CEH16E — ikabit, gabay sa disenyo, at impormasyon ng pagsunod sa kautusan.
Paunawang Hanapin
Ikabit sa Mga Alternatibo
| Parametro | Ito ang Producto | MC68020CEH16E | MC68030CEH16E | MC68SEC000AEI16 |
|---|---|---|---|---|
| Package | 132-PQFP (QFP-132, 46x46 mm, bumpered) | 132-PQFP (QFP-132, 46x46 mm) - same | 132-PQFP (QFP-132, 46x46 mm) - same | 68-PLCC / 64-PQFP (NOT same package, software-ISA-compatible only) |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core / Architecture | MC68020 (M680x0, CISC, 32-bit) | MC68020 (M680x0, CISC, 32-bit) | MC68030 (M680x0, CISC, 32-bit) | MC68SEC000 (M680x0, CISC, 32-bit, embedded variant) |
| Maximum Clock Frequency | 16.67 MHz | 16.67 MHz | 16.67 MHz | 16 MHz |
| On-chip Instruction Cache | 256 bytes | 256 bytes | 256 bytes I-cache + 256 bytes D-cache | 256 bytes (or none depending on variant) |
| MMU / TLB | Integrated, 4-Kbyte TLB | Integrated, 4-Kbyte TLB | Integrated, dual 4-Kbyte TLB | No MMU (separate MC68851 required) |
| Data Bus Width | 32-bit (dynamic 8/16/32) | 32-bit (dynamic 8/16/32) | 32-bit (dynamic 8/16/32) + burst mode | 32-bit (dynamic 8/16/32) |
| Operating Supply Voltage | 5 V | 5 V | 5 V | 3.3 V or 5 V (variant dependent) |
| FPU Coprocessor Interface | Yes (MC68881/MC68882) | Yes (MC68881/MC68882) | Yes (MC68881/MC68882) | Yes (MC68881/MC68882) |
| Lifecycle Status | NRND | NRND | NRND / last-time-buy in many channels | Active (for embedded) |
Pangunahing mga Pagkakaiba
- Pin-compatible upgrade path with integrated dual cache (kumpara saMC68030CEH16E)
- First M68K with integrated MMU on-chip (kumpara saMC68SEC000AEI16)
- Rochester Electronics authorized stock for legacy longevity (kumpara saMC68030CEH16E)
Talaan ng Disenyo
The MC68020CEH16E requires a single 5 V Vcc rail with tight tolerance (5 V +/- 5%) and bulk decoupling of at least 22 uF tantalum + 0.1 uF ceramic per Vcc pin pair. The device does not have internal power management; clock-stop power-down must be implemented externally. Estimated: typical supply current is approximately 200-300 mA at 16.67 MHz with all outputs switching, so a 1.5 A linear regulator with adequate heatsinking is recommended. Power-supply sequencing is not required, but RESET must remain asserted until Vcc stabilizes for at least 100 ms.
At a 16.67 MHz clock with CMOS internal logic, the MC68020CEH16E typically dissipates 1.0-1.5 W in the PQFP-132 package. Estimated: theta_JA for the 132-pin PQFP on a 4-layer board with copper pour is approximately 30-40 C/W, yielding a 30-60 C junction-temperature rise above ambient. The bumpered package corners improve lead-frame compliance but do not improve thermal performance - add a thermal pad on the PCB underside and 4-6 thermal vias to inner copper planes if the application runs at high ambient temperature (e.g., industrial +85 C).
Route the 32-bit address and data buses with matched trace lengths (within +/- 1 cm for the 16.67 MHz speed grade) to avoid skew on AS*, DS*, and R/W* strobes. Place a 33 ohm series damping resistor on each data-bus signal at the MPU end if the bus runs longer than 10 cm to reduce ringing. The CLK pin should be driven by a clock buffer (e.g., 74F04) rather than directly from the oscillator to maintain 50/50 duty cycle and sharp edges. Connect unused inputs (e.g., AVEC*, DSACK0/1*) through 10 kohm pull-ups to Vcc.
Do not confuse the MC68020CEH16E (16.67 MHz PQFP-132) with the MC68SEC000AEI16 (16 MHz PLCC-68) or with the PGA-packaged ceramic versions - the pin counts and PC layouts differ substantially. Do not rely on BERR* for bus-cycle termination without a watchdog timer; long BERR* assertions can hang the MPU. The 256-byte instruction cache must be flushed (via the CPUSH instruction) when self-modifying code is used or when bootstrapping from ROM - a common bug in custom boot loaders.
Impormasyon ng Pagsunod sa Kautusan
RoHS compliant and lead-free per distributor listings (DigiKey/Mouser/LCSC). The 'E' suffix in NXP/Motorola part numbers denotes the lead-free and RoHS-compliant lead finish. AEC-Q100 is not applicable to legacy MPU parts; military/aerospace grades are screened separately. Halogen-free status not explicitly stated in provided data.
