MC68020CRC16E - 32-Bit M68000 MPU, 16.67 MHz | NXP
MPN: MC68020CRC16E ✗ Cuối đờiMC68020CRC16E Tóm tắt
A microprocessor (MPU) is an integrated circuit that fetches, decodes, and executes instructions from external memory, acting as the central processing unit of an embedded system. Within the broader taxonomy, the MC68020 sits at the top of the M68000 line as a 32-bit CISC processor, descended from the 16-bit 68000, and was succeeded by the 68030 and 68040. As an embedded MPU, it operates without built-in peripherals (in contrast to a microcontroller), so designers pair it with external memory, bus controllers, and peripheral chipsets.
Key features include a 16.67 MHz clock rate (suffix 16 in the MPN), 5 V single-supply operation, instruction pipelining with a 256-byte instruction cache, dynamic bus sizing for 8/16/32-bit peripherals, eight 32-bit general-purpose data registers, and eight 32-bit address registers. The 68020 added new addressing modes, bit-field instructions, and a coprocessor interface (M68881/M68882 FPU) not present in earlier 68000-series parts. Memory management is supported via an external paged MMU (MC68851).
Typical applications include industrial control, military/aerospace embedded systems, VMEbus single-board computers, laser printer controllers, robotics, telecommunications switching, and legacy Unix workstations. Its deterministic instruction set and large address space made it a long-lived choice for safety-critical and high-reliability systems.
When designing with this device, ensure the 5 V power supply has adequate decoupling and bulk capacitance near the PGA socket; the device is typically socketed rather than soldered due to the ceramic PGA form factor. The instruction cache should be flushed during debug to maintain deterministic execution.
This page synthesizes distributor pricing, drop-in NXP-family alternatives, and practical design notes that go beyond what is reproduced in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho MC68020CRC16E — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với MC68020CRC16E (cùng hình factor và footprint) — khác nhau ở Address Bus Width, Architecture, Clock Speed, Coprocessor Interface, Data Bus Width.
MC68020CRC20E
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
MC68020CRC25E
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →MC68020RC16E
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
MC68020CRC16
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
MC68020CRC16E Tỷ lệ tối đa & tính chất điện
| Manufacturer | NXP Semiconductors |
| Processor Type | M680x0 |
| Core | 68020 |
| Architecture | 32-bit |
| Number of Cores | 1 |
| Clock Speed | 16.67 MHz (suffix 16) |
| Điện áp cung cấp | 5 V |
| Instruction Cache | 256 bytes |
| Bề rộng đường dữ liệu | 32-bit (with dynamic bus sizing for 8/16-bit peripherals) |
| Address Bus Width | 32-bit (4 GB linear address space) |
| General-Purpose Registers | 8 x 32-bit data registers, 8 x 32-bit address registers |
| Coprocessor Interface | Yes (M68881/M68882 FPU, MC68851 MMU) |
| Hộp / Vỏ | 114-BPGA (ceramic Pin Grid Array) |
| Package Dimensions | 34.55 x 34.55 mm |
| Kiểu lắp đặt | Through-hole (PGA socket) |
| Packaging | Tray |
| Lead Free Status | Lead Free |
| Trạng thái RoHS | RoHS Compliant |
Cấu hình chân MC68020CRC16E
| Chân A1 | VCC — +5 V supply |
| Chân B1 | A0 — Address bus bit 0 |
| Chân C1 | A1 — Address bus bit 1 |
| Chân D1 | A2 — Address bus bit 2 |
| Chân E1 | A3 — Address bus bit 3 |
| Chân F1 | A4 — Address bus bit 4 |
| Chân G1 | A5 — Address bus bit 5 |
| Chân H1 | A6 — Address bus bit 6 |
| Chân J1 | GND — Ground |
| Chân K1 | D0 — Data bus bit 0 |
| Chân L1 | D1 — Data bus bit 1 |
| Chân M1 | D2 — Data bus bit 2 |
| Chân N1 | D3 — Data bus bit 3 |
| Chân A2 | AS — Address Strobe |
| Chân B2 | DS — Data Strobe |
| Chân C2 | R/W — Read/Write control |
| Chân D2 | FC0 — Function Code bit 0 |
| Chân E2 | FC1 — Function Code bit 1 |
| Chân F2 | FC2 — Function Code bit 2 |
| Chân G2 | IPL0 — Interrupt Priority Level bit 0 |
| Chân H2 | IPL1 — Interrupt Priority Level bit 1 |
| Chân J2 | IPL2 — Interrupt Priority Level bit 2 |
| Chân K2 | BERR — Bus Error |
| Chân L2 | RESET — Reset input |
| Chân M2 | HALT — Halt input |
| Chân N2 | BR — Bus Request |
| Chân A3 | BG — Bus Grant |
| Chân B3 | CLK — Clock input |
Ứng dụng tiêu biểu
MC68020CRC16E phù hợp cho 6 Áp dụngs: Legacy Industrial Control Systems, Military and Aerospace Embedded Systems, VMEbus Single-Board Computers, Laser Printer and Imaging Controllers, Robotics and Motion Control, Legacy Telecommunications Switching.
Legacy Industrial Control Systems
The MC68020CRC16E's 32-bit address space and 16.67 MHz clock make it a long-lived MPU in industrial control cabinets where the original equipment was certified decades ago. With 32-bit registers and data paths, it can address up to 4 GB of memory-mapped I/O, sufficient for large PLC scan tables and complex ladder-logic replacements. The 5 V single-supply operation simplifies power supply design in legacy 5 V backplanes, and the dynamic bus sizing (8/16/32-bit) allows mixing of modern 32-bit memory with older 8-bit peripherals without glue logic. Designers sustain these systems in place because full software and tooling certifications make board respins uneconomical.
Được đề xuất
Military and Aerospace Embedded Systems
The MC68020CRC16E is used in military and aerospace embedded systems where the M68000 architecture has decades of flight heritage and certified software stacks. The ceramic 114-BPGA package provides excellent thermal and mechanical robustness, while the 16.67 MHz clock grade offers a balance between throughput and lower dynamic power for thermally constrained avionics enclosures. The instruction set is well documented in MIL-HDBK documents and the part remains on qualified parts lists for several long-running programs. New designs in this space may also consider radiation-hardened 68020 derivatives such as the UT69RH032 from CAES.
Được đề xuất
VMEbus Single-Board Computers
The MC68020CRC16E powered many classic VMEbus single-board computers (SBCs) in the late 1980s and 1990s, and the form factor remains in service today for test ranges, industrial automation, and defense electronics. Its 32-bit data bus pairs naturally with the VMEbus D32 master/slave interface, allowing high-throughput block transfers to VME memory cards. The 16.67 MHz speed grade is acceptable for instrumentation applications that prioritize deterministic timing over raw throughput, and the ceramic PGA package seats cleanly into the through-hole PGA sockets used on these legacy backplanes.
Được đề xuất
Laser Printer and Imaging Controllers
Classic laser printer controllers used the MC68020CRC16E to drive raster image processors (RIPs) at speeds sufficient for office-class print engines. The 32-bit data path and bit-field instructions accelerate font cache lookup and bitmap manipulation, while the coprocessor interface allows an MC68881/MC68882 FPU to accelerate PostScript and PCL geometric transforms. The 16.67 MHz clock grade is adequate for low-to-mid page-per-minute engines where memory bandwidth (rather than CPU clock) is the bottleneck. Today these parts are sourced primarily for service parts and remanufactured printer cartridges.
Được đề xuất
Robotics and Motion Control
Robotics platforms in the early 1990s were frequently built around the MC68020CRC16E paired with MC68881/MC68882 floating-point coprocessors for inverse-kinematics and trajectory-planning computations. The 32-bit addressing allows large shared memory regions for image and sensor data, while the deterministic instruction timing supports real-time servo loops. The 16.67 MHz clock grade is acceptable for educational, laboratory, and slow-speed industrial robotics where cost is a primary constraint. Modern robotics designs have moved to ARM Cortex-M and Cortex-A parts, but M68020-based robots are still maintained in research labs and industrial lines.
Được đề xuất
Legacy Telecommunications Switching
Telecommunications switching systems deployed in the 1990s used the MC68020CRC16E in call-processing controllers and signaling interfaces. The 32-bit architecture supports large route tables and signaling protocol stacks, while the deterministic interrupt response of the M68000 architecture is well suited to telecom real-time requirements. The ceramic PGA package and lead-free RoHS compliance allow the part to be re-sourced for legacy line-card refresh programs where full board redesign is not economically viable. The 16.67 MHz clock grade is sufficient for call control-plane tasks, with data plane typically offloaded to DSPs.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MC68020CRC16E — 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 | MC68020CRC20E | MC68020CRC25E | MC68020CRC16 | MC68020RC16E |
|---|---|---|---|---|---|
| Package | 114-BPGA (34.55x34.55 mm) | 114-BPGA - same | 114-BPGA - same | 114-BPGA - same | 114-PGA (rectangular) - different layout |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Clock Speed | 16.67 MHz | 20 MHz | 25 MHz | 16.67 MHz | 16.67 MHz |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V |
| Architecture | 32-bit M68000 | 32-bit M68000 | 32-bit M68000 | 32-bit M68000 | 32-bit M68000 |
| Instruction Cache | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| Lead-Free / RoHS | Yes / Compliant | Yes / Compliant | Yes / Compliant | No / Non-compliant | Yes / Compliant |
| Lifecycle Status | NRND | NRND | NRND | Obsolete | Obsolete |
Bảo phân biệt quan trọng
- Full 32-bit M68000 MPU with coprocessor interface (vsMC68000 (original 16-bit))
- 16.67 MHz clock grade optimized for power-sensitive legacy designs (vsMC68020CRC25E (25 MHz grade))
- Lead-free / RoHS compliant ceramic PGA package (vsMC68020CRC16 (non-E suffix))
- NXP-sourced with active distributor stock (vsOriginal Motorola-branded units)
Ghi chú thiết kế
The MC68020CRC16E draws approximately 200-400 mA at 5 V (1-2 W typical, 2.5 W worst case) at 16.67 MHz. The ceramic PGA package can dissipate this without a heatsink at room temperature, but in enclosed systems designers should add thermal vias under the PGA socket and provide at least 100 LFM linear CFM linear airflow over the package. Bulk decoupling of at least 100 uF tantalum plus 0.1 uF ceramic per VCC pin is recommended to suppress the high transient currents when the 32-bit data bus switches.
The 114-BPGA package is almost never soldered directly - it is mounted in a PGA socket (typically a machined-pin socket). Verify the socket footprint matches the 34.55 x 34.55 mm pin array with 2.54 mm pitch. Always include a PGA socket cover or mechanical retention bracket, because ceramic PGA packages are vulnerable to vibration-induced cracking in industrial and aerospace environments. Decoupling capacitors should be placed on the back side of the PCB directly under the PGA footprint using short traces.
Do not assume the MC68020CRC16E can be replaced by the MC68020RC16E - despite the similar part number, the 'C' and 'R' suffixes denote different PGA pin layouts that are NOT pin-compatible. When sourcing, always check the date code and request traceability documentation; the M68000 family is a frequent target for counterfeit parts because of limited authorized supply. The instruction cache must be flushed on debug breakpoints to maintain deterministic execution - failure to do so can mask race conditions in real-time code.
At 16.67 MHz, address and data bus edges have rise times of approximately 5 ns, which can produce transmission-line effects on bus traces longer than 8 inches. Use controlled-impedance routing (typically 50-68 ohm microstrip) for the address and data buses, and add 22-33 ohm series damping resistors near the MC68020CRC16E end of long bus runs. The BERR (Bus Error) and HALT signals should be pulled up with 4.7 kohm resistors to prevent spurious bus-error interrupts during power-up.
Thông tin tuân thủ
RoHS compliant and lead-free per DigiKey and digchip.com specifications. AEC-Q100 not applicable (legacy industrial/military MPU, not automotive). Halogen-free status not stated in available data.
