MC68020CRC16E - 32-Bit M68000 MPU, 16.67 MHz | NXP
MPN： MC68020CRC16E ✗ 停產MC68020CRC16E 概覽
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.
直接替換替代品，適用於 MC68020CRC16E — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： MC68020CRC16E （相同外形與佔位） — 差異在於 Address Bus Width, Architecture, Clock Speed, Coprocessor Interface, Data Bus Width.
MC68020CRC20E
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MC68020CRC25E
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →MC68020RC16E
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MC68020CRC16
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MC68020CRC16E 最大額定值與電氣特性
| Manufacturer | NXP Semiconductors |
| Processor Type | M680x0 |
| Core | 68020 |
| Architecture | 32-bit |
| Number of Cores | 1 |
| Clock Speed | 16.67 MHz (suffix 16) |
| 供應電壓 | 5 V |
| Instruction Cache | 256 bytes |
| 資料匯流排寬度 | 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) |
| 封裝 / 外殼 | 114-BPGA (ceramic Pin Grid Array) |
| Package Dimensions | 34.55 x 34.55 mm |
| 安裝類型 | Through-hole (PGA socket) |
| Packaging | Tray |
| Lead Free Status | Lead Free |
| RoHS 狀態 | RoHS Compliant |
MC68020CRC16E 腳位配置
| 腳位 A1 | VCC — +5 V supply |
| 腳位 B1 | A0 — Address bus bit 0 |
| 腳位 C1 | A1 — Address bus bit 1 |
| 腳位 D1 | A2 — Address bus bit 2 |
| 腳位 E1 | A3 — Address bus bit 3 |
| 腳位 F1 | A4 — Address bus bit 4 |
| 腳位 G1 | A5 — Address bus bit 5 |
| 腳位 H1 | A6 — Address bus bit 6 |
| 腳位 J1 | GND — Ground |
| 腳位 K1 | D0 — Data bus bit 0 |
| 腳位 L1 | D1 — Data bus bit 1 |
| 腳位 M1 | D2 — Data bus bit 2 |
| 腳位 N1 | D3 — Data bus bit 3 |
| 腳位 A2 | AS — Address Strobe |
| 腳位 B2 | DS — Data Strobe |
| 腳位 C2 | R/W — Read/Write control |
| 腳位 D2 | FC0 — Function Code bit 0 |
| 腳位 E2 | FC1 — Function Code bit 1 |
| 腳位 F2 | FC2 — Function Code bit 2 |
| 腳位 G2 | IPL0 — Interrupt Priority Level bit 0 |
| 腳位 H2 | IPL1 — Interrupt Priority Level bit 1 |
| 腳位 J2 | IPL2 — Interrupt Priority Level bit 2 |
| 腳位 K2 | BERR — Bus Error |
| 腳位 L2 | RESET — Reset input |
| 腳位 M2 | HALT — Halt input |
| 腳位 N2 | BR — Bus Request |
| 腳位 A3 | BG — Bus Grant |
| 腳位 B3 | CLK — Clock input |
典型應用
MC68020CRC16E 適用於 6 應用s: 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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
推薦產品摘要
工程參考資料，適用於 MC68020CRC16E — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | 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 |
主要差異化特點
- Full 32-bit M68000 MPU with coprocessor interface (對比MC68000 (original 16-bit))
- 16.67 MHz clock grade optimized for power-sensitive legacy designs (對比MC68020CRC25E (25 MHz grade))
- Lead-free / RoHS compliant ceramic PGA package (對比MC68020CRC16 (non-E suffix))
- NXP-sourced with active distributor stock (對比Original Motorola-branded units)
設計說明
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.
合規資訊
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.
