MC68EC020AA25 - 32-Bit 25MHz M680x0 MPU | NXP | 100-QFP
MPN: MC68EC020AA25 ✗ Akhir HidupMC68EC020AA25 Ringkasan
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.
Alternatif penggantian untuk MC68EC020AA25 — paket yang sama, pin-pada-pin kompatibel. Bagian paket yang berbeda memerlukan kerja ulang PCB diabaikan.
Variasi di dalam seri ini
Model-series yang sama yang kompatibel dengan penggantian MC68EC020AA25 (sama faktor bentuk dan footprint) — berbeda di dalam Address Bus Width, Data Bus Width, MMU, Processor Type.
MC68EC020AA16
✅ Drop-In ⚠️ Spesifikasi Tidak DisahkanKontak untuk harga
Lihat Datasheet →MC68EC020AA20
✅ Drop-In ⚠️ Spesifikasi Tidak Disahkan📋 Alternatif referensi (tidak dalam katalog)
MC68EC020AA25R
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
MC68020FE184TA26
✅ Drop-In ⚠️ Spesifikasi Tidak Disahkan📋 Alternatif referensi (tidak dalam katalog)
MC68020FE184TA25
✅ Drop-In ⚠️ Spesifikasi Tidak Disahkan📋 Alternatif referensi (tidak dalam katalog)
MC68EC020AA25 Rating Maksimal & Karakteristik Listrik
| Processor Type | M680x0 32-Bit MPU |
| Core | 1 Core, 32-Bit (M68020 instruction set) |
| Family / Sub-family | M68000 / MC68EC020 (no MMU) |
| Frekuensi Bawah Maximum | 25 MHz |
| Tegangan Pemuat Kerja | 5 V |
| Lebar Bus Data | 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) |
| Jumlah Pin | 100 |
| Paket | 100-QFP (14x20 mm) |
| Tipe Mounting | Surface Mount |
| Packaging | Tray |
| Lead Free Status | Lead Free |
| Status RoHS | RoHS Compliant |
Konfigurasi Pin MC68EC020AA25
| Pin produk 1 | D0 — Data bus bit 0 |
| Pin produk 2 | D1 — Data bus bit 1 |
| Pin produk 3 | D2 — Data bus bit 2 |
| Pin produk 4 | D3 — Data bus bit 3 |
| Pin produk 5 | D4 — Data bus bit 4 |
| Pin produk 6 | D5 — Data bus bit 5 |
| Pin produk 7 | D6 — Data bus bit 6 |
| Pin produk 8 | D7 — Data bus bit 7 |
| Pin produk 9 | D8 — Data bus bit 8 |
| Pin produk 10 | D9 — Data bus bit 9 |
| Pin produk 11 | D10 — Data bus bit 10 |
| Pin produk 12 | D11 — Data bus bit 11 |
| Pin produk 13 | D12 — Data bus bit 12 |
| Pin produk 14 | D13 — Data bus bit 13 |
| Pin produk 15 | D14 — Data bus bit 14 |
| Pin produk 16 | D15 — Data bus bit 15 |
| Pin produk 17 | D16 — Data bus bit 16 |
| Pin produk 18 | D17 — Data bus bit 17 |
| Pin produk 19 | D18 — Data bus bit 18 |
| Pin produk 20 | D19 — Data bus bit 19 |
| Pin produk 21 | D20 — Data bus bit 20 |
| Pin produk 22 | D21 — Data bus bit 21 |
| Pin produk 23 | D22 — Data bus bit 22 |
| Pin produk 24 | D23 — Data bus bit 23 |
| Pin produk 25 | D24 — Data bus bit 24 |
| Pin produk 26 | D25 — Data bus bit 25 |
| Pin produk 27 | D26 — Data bus bit 26 |
| Pin produk 28 | D27 — Data bus bit 27 |
| Pin produk 29 | D28 — Data bus bit 28 |
| Pin produk 30 | D29 — Data bus bit 29 |
| Pin produk 31 | D30 — Data bus bit 30 |
| Pin produk 32 | D31 — Data bus bit 31 |
| Pin produk 33 | A0 — Address bus bit 0 |
| Pin produk 34 | A1 — Address bus bit 1 |
| Pin produk 35 | A2 — Address bus bit 2 |
| Pin produk 36 | A3 — Address bus bit 3 |
| Pin produk 37 | A4 — Address bus bit 4 |
| Pin produk 38 | A5 — Address bus bit 5 |
| Pin produk 39 | A6 — Address bus bit 6 |
| Pin produk 40 | A7 — Address bus bit 7 |
| Pin produk 41 | A8 — Address bus bit 8 |
| Pin produk 42 | A9 — Address bus bit 9 |
| Pin produk 43 | A10 — Address bus bit 10 |
| Pin produk 44 | A11 — Address bus bit 11 |
| Pin produk 45 | A12 — Address bus bit 12 |
| Pin produk 46 | A13 — Address bus bit 13 |
| Pin produk 47 | A14 — Address bus bit 14 |
| Pin produk 48 | A15 — Address bus bit 15 |
| Pin produk 49 | A16 — Address bus bit 16 |
| Pin produk 50 | A17 — Address bus bit 17 |
| Pin produk 51 | A18 — Address bus bit 18 |
| Pin produk 52 | A19 — Address bus bit 19 |
| Pin produk 53 | A20 — Address bus bit 20 |
| Pin produk 54 | A21 — Address bus bit 21 |
| Pin produk 55 | A22 — Address bus bit 22 |
| Pin produk 56 | A23 — Address bus bit 23 |
| Pin produk 57 | A24 — Address bus bit 24 |
| Pin produk 58 | A25 — Address bus bit 25 |
| Pin produk 59 | A26 — Address bus bit 26 |
| Pin produk 60 | A27 — Address bus bit 27 |
| Pin produk 61 | A28 — Address bus bit 28 |
| Pin produk 62 | A29 — Address bus bit 29 |
| Pin produk 63 | A30 — Address bus bit 30 |
| Pin produk 64 | A31 — Address bus bit 31 |
| Pin produk 65 | GND — Ground |
| Pin produk 66 | CLK — Clock input |
| Pin produk 67 | VCC — 5V power supply |
| Pin produk 68 | RESET — Reset input |
| Pin produk 69 | HALT — Halt input |
| Pin produk 70 | IPEND — Interrupt pending output |
| Pin produk 71 | IACK — Interrupt acknowledge output |
| Pin produk 72 | IRQ1 — Interrupt request level 1 |
| Pin produk 73 | IRQ2 — Interrupt request level 2 |
| Pin produk 74 | IRQ3 — Interrupt request level 3 |
| Pin produk 75 | IRQ4 — Interrupt request level 4 |
| Pin produk 76 | IRQ5 — Interrupt request level 5 |
| Pin produk 77 | IRQ6 — Interrupt request level 6 |
| Pin produk 78 | IRQ7 — Interrupt request level 7 |
| Pin produk 79 | AS — Address strobe output |
| Pin produk 80 | DS — Data strobe output |
| Pin produk 81 | R/W — Read/Write output |
| Pin produk 82 | FC0 — Function code output bit 0 |
| Pin produk 83 | FC1 — Function code output bit 1 |
| Pin produk 84 | FC2 — Function code output bit 2 |
| Pin produk 85 | SIZ0 — Transfer size output bit 0 |
| Pin produk 86 | SIZ1 — Transfer size output bit 1 |
| Pin produk 87 | BERR — Bus error input |
| Pin produk 88 | AVEC — Autovector input |
| Pin produk 89 | DSACK0 — Data acknowledge input bit 0 |
| Pin produk 90 | DSACK1 — Data acknowledge input bit 1 |
| Pin produk 91 | OCDS — On-chip debug/clock output |
| Pin produk 92 | BR — Bus request input |
| Pin produk 93 | BG — Bus grant output |
| Pin produk 94 | BGACK — Bus grant acknowledge input |
| Pin produk 95 | VCC — 5V power supply |
| Pin produk 96 | GND — Ground |
| Pin produk 97 | TDI — Test data input (JTAG) |
| Pin produk 98 | TDO — Test data output (JTAG) |
| Pin produk 99 | TMS — Test mode select (JTAG) |
| Pin produk 100 | TCK — Test clock input (JTAG) |
Aplikasi Umum
MC68EC020AA25 cocok untuk 6 aplikasis: 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.
Direkomendasikan
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.
Direkomendasikan
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.
Direkomendasikan
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.
Direkomendasikan
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.
Direkomendasikan
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.
Direkomendasikan
Ringkasan Produk Direkomendasikan
Data referensi engineering untuk MC68EC020AA25 — pembandingan, panduan desain, dan informasi konformitas.
Panduan Pemilihan
Pembandingan dengan Alternatif
| Parameter Umum | Produk Ini | 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) |
Diferensiator Kunci
- No MMU for cost-sensitive 32-bit embedded designs (vsMC68020FE184TA25)
- 25 MHz rating within the 100-QFP EC020 family (vsMC68EC020AA16)
- Higher 25 MHz throughput than 16 MHz SEC000 alternative (vsMC68SEC000)
Catatan Desain
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.
Informasi Konformitas
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.
