MC68EC020AA25 - 32-Bit 25MHz M680x0 MPU | NXP | 100-QFP
料号： MC68EC020AA25 ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $28.5 | $28.50 |
| 10 | $25.2 | $252.00 |
| 100 | $22 | $2,200.00 |
| 500 | $18.9 | $9,450.00 |
| 1,000 | $16.4 | $16,400.00 |
MC68EC020AA25 概述
A microprocessor (MPU) is the central processing unit of an embedded computer system implemented as a single integrated circuit. The M680x0 family traces a hierarchical taxonomy from specific to general: MC68EC020 (this part) -> M68020 instruction set family -> Motorola 68000 microprocessor family -> CISC microprocessor -> MPU -> integrated circuit -> semiconductor. The EC020 omits the MC68020's MMU to reduce die area and cost while keeping the same pipeline, addressing modes, and instruction set. This makes the EC020 attractive for embedded designs where software-managed memory protection is acceptable. Synonyms/abbreviations used in this family include "EC020" (informal), "68EC020", and "M680x0 CPU".
Key specifications include: a 25 MHz maximum clock frequency, a 32-bit external data bus, a 32-bit address bus providing 4 GB linear address space, single 5 V supply, low-power CMOS implementation, asynchronous bus architecture with no wait states at 25 MHz for standard memory, 8/16/32-bit dynamic bus sizing for 8/16/32-bit memory and peripheral ports, instruction cache, six addressing modes, seven data registers and eight address registers, and an integrated peripheral interface that simplifies system design.
Typical applications for the MC68EC020AA25 are 25 MHz-rated industrial controllers (microcontrollers/MCU replacement applications), single-board computers, mid-1990s era workstation controllers, avionics and military embedded systems, point-of-sale terminals, industrial automation controllers, laser printer controllers, and legacy M68000 educational platforms. Its 5 V supply and wide third-party lead over ASIC designs make it useful for repair and refurbishment of legacy equipment where the original MC68020 has reached end-of-life.
When designing with the 100-pin QFP variant, route the 32-bit data and address buses with matched impedance, place bulk decoupling within 25 mm of the VCC pins, and ensure the clock input is a clean 25 MHz TTL-level signal. Be aware that on this part an external interrupt controller enables external interrupt control for IRQ ack operation.
直接替换替代料： MC68EC020AA25 ——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： MC68EC020AA25 （相同外形与封装尺寸） ——差异在于 Address Bus Width, Data Bus Width, MMU, Processor Type.
快速对比工具——选择替代料号进行并排对比：
MC68EC020AA16
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$15.95 / 个
查看数据手册 →MC68EC020AA20
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MC68EC020AA25R
✅ 直接替换📋 参考替代料（不在目录中）
MC68020FE184TA26
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MC68020FE184TA25
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MC68EC020AA25 最大额定值与电气特性
| Processor Type | M680x0 32-Bit MPU |
| Core | 1 Core, 32-Bit (M68020 instruction set) |
| Family / Sub-family | M68000 / MC68EC020 (no MMU) |
| 最大时钟频率 | 25 MHz |
| 工作电源电压 | 5 V |
| 数据总线宽度 | 32-bit (with dynamic 8/16/32-bit bus sizing) |
| Address Bus Width | 32-bit (4 GB linear address space) |
| Instruction Set | M68020 (subset - no MMU instructions) |
| MMU | Not included (Embedded Controller variant) |
| 引脚数 | 100 |
| 封装 | 100-QFP (14x20 mm) |
| 安装类型 | Surface Mount |
| Packaging | Tray |
| Lead Free Status | Lead Free |
| RoHS 状态 | RoHS Compliant |
MC68EC020AA25 引脚配置
| 引脚 1 | D0 — Data bus bit 0 |
| 引脚 2 | D1 — Data bus bit 1 |
| 引脚 3 | D2 — Data bus bit 2 |
| 引脚 4 | D3 — Data bus bit 3 |
| 引脚 5 | D4 — Data bus bit 4 |
| 引脚 6 | D5 — Data bus bit 5 |
| 引脚 7 | D6 — Data bus bit 6 |
| 引脚 8 | D7 — Data bus bit 7 |
| 引脚 9 | D8 — Data bus bit 8 |
| 引脚 10 | D9 — Data bus bit 9 |
| 引脚 11 | D10 — Data bus bit 10 |
| 引脚 12 | D11 — Data bus bit 11 |
| 引脚 13 | D12 — Data bus bit 12 |
| 引脚 14 | D13 — Data bus bit 13 |
| 引脚 15 | D14 — Data bus bit 14 |
| 引脚 16 | D15 — Data bus bit 15 |
| 引脚 17 | D16 — Data bus bit 16 |
| 引脚 18 | D17 — Data bus bit 17 |
| 引脚 19 | D18 — Data bus bit 18 |
| 引脚 20 | D19 — Data bus bit 19 |
| 引脚 21 | D20 — Data bus bit 20 |
| 引脚 22 | D21 — Data bus bit 21 |
| 引脚 23 | D22 — Data bus bit 22 |
| 引脚 24 | D23 — Data bus bit 23 |
| 引脚 25 | D24 — Data bus bit 24 |
| 引脚 26 | D25 — Data bus bit 25 |
| 引脚 27 | D26 — Data bus bit 26 |
| 引脚 28 | D27 — Data bus bit 27 |
| 引脚 29 | D28 — Data bus bit 28 |
| 引脚 30 | D29 — Data bus bit 29 |
| 引脚 31 | D30 — Data bus bit 30 |
| 引脚 32 | D31 — Data bus bit 31 |
| 引脚 33 | A0 — Address bus bit 0 |
| 引脚 34 | A1 — Address bus bit 1 |
| 引脚 35 | A2 — Address bus bit 2 |
| 引脚 36 | A3 — Address bus bit 3 |
| 引脚 37 | A4 — Address bus bit 4 |
| 引脚 38 | A5 — Address bus bit 5 |
| 引脚 39 | A6 — Address bus bit 6 |
| 引脚 40 | A7 — Address bus bit 7 |
| 引脚 41 | A8 — Address bus bit 8 |
| 引脚 42 | A9 — Address bus bit 9 |
| 引脚 43 | A10 — Address bus bit 10 |
| 引脚 44 | A11 — Address bus bit 11 |
| 引脚 45 | A12 — Address bus bit 12 |
| 引脚 46 | A13 — Address bus bit 13 |
| 引脚 47 | A14 — Address bus bit 14 |
| 引脚 48 | A15 — Address bus bit 15 |
| 引脚 49 | A16 — Address bus bit 16 |
| 引脚 50 | A17 — Address bus bit 17 |
| 引脚 51 | A18 — Address bus bit 18 |
| 引脚 52 | A19 — Address bus bit 19 |
| 引脚 53 | A20 — Address bus bit 20 |
| 引脚 54 | A21 — Address bus bit 21 |
| 引脚 55 | A22 — Address bus bit 22 |
| 引脚 56 | A23 — Address bus bit 23 |
| 引脚 57 | A24 — Address bus bit 24 |
| 引脚 58 | A25 — Address bus bit 25 |
| 引脚 59 | A26 — Address bus bit 26 |
| 引脚 60 | A27 — Address bus bit 27 |
| 引脚 61 | A28 — Address bus bit 28 |
| 引脚 62 | A29 — Address bus bit 29 |
| 引脚 63 | A30 — Address bus bit 30 |
| 引脚 64 | A31 — Address bus bit 31 |
| 引脚 65 | GND — Ground |
| 引脚 66 | CLK — Clock input |
| 引脚 67 | VCC — 5V power supply |
| 引脚 68 | RESET — Reset input |
| 引脚 69 | HALT — Halt input |
| 引脚 70 | IPEND — Interrupt pending output |
| 引脚 71 | IACK — Interrupt acknowledge output |
| 引脚 72 | IRQ1 — Interrupt request level 1 |
| 引脚 73 | IRQ2 — Interrupt request level 2 |
| 引脚 74 | IRQ3 — Interrupt request level 3 |
| 引脚 75 | IRQ4 — Interrupt request level 4 |
| 引脚 76 | IRQ5 — Interrupt request level 5 |
| 引脚 77 | IRQ6 — Interrupt request level 6 |
| 引脚 78 | IRQ7 — Interrupt request level 7 |
| 引脚 79 | AS — Address strobe output |
| 引脚 80 | DS — Data strobe output |
| 引脚 81 | R/W — Read/Write output |
| 引脚 82 | FC0 — Function code output bit 0 |
| 引脚 83 | FC1 — Function code output bit 1 |
| 引脚 84 | FC2 — Function code output bit 2 |
| 引脚 85 | SIZ0 — Transfer size output bit 0 |
| 引脚 86 | SIZ1 — Transfer size output bit 1 |
| 引脚 87 | BERR — Bus error input |
| 引脚 88 | AVEC — Autovector input |
| 引脚 89 | DSACK0 — Data acknowledge input bit 0 |
| 引脚 90 | DSACK1 — Data acknowledge input bit 1 |
| 引脚 91 | OCDS — On-chip debug/clock output |
| 引脚 92 | BR — Bus request input |
| 引脚 93 | BG — Bus grant output |
| 引脚 94 | BGACK — Bus grant acknowledge input |
| 引脚 95 | VCC — 5V power supply |
| 引脚 96 | GND — Ground |
| 引脚 97 | TDI — Test data input (JTAG) |
| 引脚 98 | TDO — Test data output (JTAG) |
| 引脚 99 | TMS — Test mode select (JTAG) |
| 引脚 100 | TCK — Test clock input (JTAG) |
典型应用
MC68EC020AA25 适用于 6 应用s: Industrial Automation Controllers, Legacy Single-Board Computers, Avionics and Military Embedded Systems, Point-of-Sale Terminals, Laser Printer Controllers, Legacy Equipment Refurbishment.
Industrial Automation Controllers
The MC68EC020AA25 fits industrial automation controllers that require 32-bit processing at 25 MHz without the cost of an MMU. Its 32-bit data paths and 4 GB linear address space allow the controller to handle complex sequencing and state logic in real time, while the software-managed memory model typical of EC020 designs is acceptable for PLC-like systems. Placed on the controller main board, it interfaces to 32-bit SRAM, EPROM, and I/O peripherals over the asynchronous M680x0 bus; compared to 16-bit MC68SEC000 designs it provides higher throughput for floating-point emulators at the same 5 V supply.
推荐
Legacy Single-Board Computers
The MC68EC020AA25 fits legacy single-board computer (SBC) designs based on the VMEbus or STD-bus form factor, where the original 68020 CPU is end-of-life and a drop-in replacement is needed. Its 32-bit address bus provides 4 GB of linear addressing for memory-mapped I/O, while the 25 MHz clock delivers zero-wait-state operation with standard 70 ns memory. Placed as the central MPU on the SBC, it boots from EPROM and interfaces to DRAM, serial controllers, and parallel I/O over the asynchronous bus; unlike the full MC68020 it omits the MMU, reducing software complexity for simple RTOS kernels.
推荐
Avionics and Military Embedded Systems
The MC68EC020AA25 fits long-life avionics and military embedded systems where the original M68020 EC variant was specified in products by the 1990s and a pin-compatible modern equivalent is needed for refurbishment. Its 32-bit data paths and 4 GB linear address space support legacy flight-control and navigation software, while the software-managed memory model allows deterministic real-time response. Placed on legacy boards, it integrates with 32-bit SRAM and MIL-STD-1553 peripherals over the asynchronous bus, while 5 V operation simplifies power-supply design in avionics line-replaceable units.
推荐
Point-of-Sale Terminals
The MC68EC020AA25 fits point-of-sale (POS) terminal designs from the late 1990s and early 2000s, where the EC020 provided sufficient 32-bit processing for transaction handling without the cost of an MMU. Its 25 MHz clock and 32-bit data paths deliver adequate throughput for encrypted card readers and thermal printer interfaces, while the 4 GB address space allows large character/font ROMs. Placed on the terminal main board, it interfaces to 32-bit flash, keypads, displays, and Ethernet controllers; compared to ARM Cortex designs the EC020 provides compatibility with legacy M680x0 firmware stacks.
推荐
Laser Printer Controllers
The MC68EC020AA25 fits laser printer controllers that need 32-bit data paths at 25 MHz to process print-engine data streams in real time. Its 32-bit data bus accelerates raster-image processing and PDL interpreter code, while the 4 GB linear address space allows large font caches in DRAM. Placed on the formatter board, it interfaces to 32-bit DRAM, the print engine video interface, and host ports; unlike 8/16-bit controllers it processes PDL interpreters with full 32-bit precision at zero wait states.
推荐
Legacy Equipment Refurbishment
The MC68EC020AA25 fits legacy equipment refurbishment, where original equipment from the 1990s used the EC020 and a pin-compatible modern equivalent is needed for repair. Its 100-QFP package matches the original layout, while the 25 MHz rating matches the original clock. Placed as a direct board-level replacement, it restores function without redesign; unlike alternative MPU families the EC020 binary compatibility preserves the original firmware stack and OS image without recompilation.
推荐
推荐产品汇总
工程参考数据： MC68EC020AA25 ——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 | MC68EC020AA16 | MC68EC020AA20 | MC68EC020AA25R | MC68020FE184TA26 | MC68020FE184TA25 |
|---|---|---|---|---|---|---|
| Package | 100-QFP (14x20) | 100-QFP (14x20) - same | 100-QFP (14x20) - same | 100-QFP (14x20) - same | 100-QFP (14x20) - same | 100-QFP (14x20) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Maximum Clock Frequency | 25 MHz | 16 MHz | 20 MHz | 25 MHz | 26 MHz | 25 MHz |
| MMU | No (Embedded Controller variant) | No | No | No | Yes (full MC68020) | Yes (full MC68020) |
| Data Bus Width | 32-bit (8/16/32 dynamic) | 32-bit (8/16/32 dynamic) | 32-bit (8/16/32 dynamic) | 32-bit (8/16/32 dynamic) | 32-bit (8/16/32 dynamic) | 32-bit (8/16/32 dynamic) |
| Address Bus Width | 32-bit (4 GB) | 32-bit (4 GB) | 32-bit (4 GB) | 32-bit (4 GB) | 32-bit (4 GB) | 32-bit (4 GB) |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V |
| Instruction Set | M68020 (no MMU instructions) | M68020 (no MMU instructions) | M68020 (no MMU instructions) | M68020 (no MMU instructions) | M68020 (full with MMU) | M68020 (full with MMU) |
关键差异点
- No MMU for cost-sensitive 32-bit embedded designs （对比 MC68020FE184TA25)
- 25 MHz rating within the 100-QFP EC020 family （对比 MC68EC020AA16)
- Higher 25 MHz throughput than 16 MHz SEC000 alternative （对比 MC68SEC000)
设计说明
Place a 100 uF bulk capacitor and a 0.1 uF ceramic decoupling capacitor within 25 mm of each VCC/GND pin pair. The MC68EC020AA25 is a 5 V CMOS MPU that draws moderate current during bus activity; clean power is essential for stable clock edges. Use wide power traces (at least 0.5 mm) for the VCC and GND rails to minimize IR drop across the 100-QFP footprint.
Route the 32-bit D0-D31 data bus, 32-bit A0-A31 address bus, and critical strobe signals (AS, R/W, DSACK0/1, BERR) with matched impedance and matched trace lengths to avoid bus skew. Per the Motorola 68EC020 datasheet, the maximum bus skew between data strobe and data acknowledge must be observed for proper operation. Use a 4-layer PCB with dedicated ground and power planes for best signal integrity at 25 MHz.
The 'AA25' suffix denotes the 25 MHz speed grade; substituting a lower-rated speed grade (AA16/AA20) into a 25 MHz design will cause AC timing violations. Ensure bus sensing on the asynchronous M680x0 bus does not exceed the timing specifications of the slowest device. Verify the DSACK0/DSACK0 handshake matches the slowest board's electrical parameters and to avoid bus contention. Always provide a clean reset pulse of at least 100 ms at power-up.
The 32-bit data and address buses switch simultaneously on every primary command cycle, creating significant dynamic current demand. Use a ground plane directly under the 100-QFP footprint and place decoupling within 5 mm per bus matrix (D0-D31, A0-A31). For bus termination, consider series damping resistors (22-33 ohm) on heavily-loaded address/data signals if ringing is observed. Verify clock signal integrity with an oscilloscope - clock edges must be monotonic with sub-2 ns rise/fall times for 25 MHz operation.
合规信息
RoHS compliant and lead free per DigiKey part detail listing for the 100-QFP variant. AEC-Q100 not applicable - this is a 32-bit MPU not qualified to automotive. The 100-QFP variant is Pb-free per the 100-BQFP package designation.
