MC68SEC000AA20R2 - 32-Bit M68000 Static MPU, 20MHz, 64-QFP | NXP
料号： MC68SEC000AA20R2 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $20.47 | $20.47 |
| 10 | $18.42 | $184.20 |
| 100 | $16.38 | $1,638.00 |
| 500 | $14.34 | $7,170.00 |
| 1,000 | $12.29 | $12,290.00 |
MC68SEC000AA20R2 概述
A microprocessor (MPU) is the master computational element in an embedded system, integrating a 32-bit ALU, address and data registers, exception logic, and bus interface in a single IC. The M68000 architecture sits inside the broader taxonomy of microprocessor -> CPU -> digital logic IC -> semiconductor, and the EC000/SEC000 lines specifically target cost-sensitive embedded applications where static (clockless) operation simplifies design and enables low-power sleep modes. The MC68SEC000 variant adds HCMOS construction for substantially reduced power versus the original MC68000 NMOS design.
Key features include a 32-bit internal architecture with a 24-bit address bus, 16-bit external data bus, 8/16/32-bit selectable data-bus modes in some variants, eight 32-bit data registers, eight 32-bit address registers, and 56 instruction types supporting 14 addressing modes. Static operation eliminates minimum clock frequency, supports full DC-to-rated-MHz operation, and integrates power-saving HCMOS logic. The SEC000 is fully pin-for-pin compatible with the MC68EC000, allowing direct board-level substitution without rework.
The 20 MHz clock, 24-bit address space (16 MB), and 32-bit internal datapath deliver roughly 10 MIPS of sustained throughput, more than enough for industrial controllers, automotive body modules, telecom control planes, and legacy computing upgrades. The static core allows wait-state insertion and clock stretching for slow peripherals.
Typical applications include industrial automation controllers, telecom control processors, automotive body and chassis ECUs, motor control front-ends, point-of-sale terminals, and legacy M68000 upgrades where low cost and pin-compatibility with the MC68EC000 are required.
When designing with this part, allocate a 64-pin QFP PCB land pattern and provide a stable 3.3V or 5V rail with decoupling near each VDD/VSS pair. Add proper bus termination for the address/data bus at 20 MHz to avoid ringing on long traces.
This page synthesizes distributor pricing, pin-compatible SEC000 alternatives, and PCB-layout guidance not always consolidated in the original product brief.
直接替换替代料： MC68SEC000AA20R2 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
MC68SEC000AA10R2
✅ 直接替换📋 参考替代料（不在目录中）
MC68SEC000AA16R2
✅ 直接替换📋 参考替代料（不在目录中）
MC68SEC000AE10R2
✅ 直接替换📋 参考替代料（不在目录中）
MC68SEC000CAE20R2
✅ 直接替换📋 参考替代料（不在目录中）
MC68SEC000AA20R2 最大额定值与电气特性
| Processor Type | M680x0 32-Bit Microprocessor |
| Core Architecture | HCMOS M68000 SEC000 |
| Number of Cores | 1 |
| 最大时钟频率 | 20 MHz |
| 数据总线宽度 | 8/16/32-Bit (external 16-bit) |
| Address Bus Width | 24-Bit |
| Address Space | 16 MB |
| 电源电压 | 3.3 V / 5 V |
| Operating Modes | Static (DC to 20 MHz) |
| Number of Data Registers | 8 x 32-bit |
| Number of Address Registers | 8 x 32-bit |
| Instruction Set | 56 instruction types, 14 addressing modes |
| 封装 | 64-QFP (14x14 mm) |
| 安装类型 | Surface Mount |
| Pin Compatibility | Pin-for-pin with MC68EC000 |
| RoHS 状态 | RoHS Compliant |
| Lead Free Status | Lead Free |
MC68SEC000AA20R2 引脚配置
| 引脚 1 | VSS — Ground reference |
| 引脚 2 | VCC — 3.3 V or 5 V supply |
| 引脚 3 | A0 — Address bus bit 0 |
| 引脚 4 | A1 — Address bus bit 1 |
| 引脚 5 | A2 — Address bus bit 2 |
| 引脚 6 | A3 — Address bus bit 3 |
| 引脚 7 | A4 — Address bus bit 4 |
| 引脚 8 | A5 — Address bus bit 5 |
| 引脚 9 | A6 — Address bus bit 6 |
| 引脚 10 | A7 — Address bus bit 7 |
| 引脚 11 | A8 — Address bus bit 8 |
| 引脚 12 | A9 — Address bus bit 9 |
| 引脚 13 | A10 — Address bus bit 10 |
| 引脚 14 | A11 — Address bus bit 11 |
| 引脚 15 | A12 — Address bus bit 12 |
| 引脚 16 | A13 — Address bus bit 13 |
| 引脚 17 | A14 — Address bus bit 14 |
| 引脚 18 | A15 — Address bus bit 15 |
| 引脚 19 | A16 — Address bus bit 16 |
| 引脚 20 | A17 — Address bus bit 17 |
| 引脚 21 | A18 — Address bus bit 18 |
| 引脚 22 | A19 — Address bus bit 19 |
| 引脚 23 | A20 — Address bus bit 20 |
| 引脚 24 | A21 — Address bus bit 21 |
| 引脚 25 | A22 — Address bus bit 22 |
| 引脚 26 | A23 — Address bus bit 23 |
| 引脚 27 | VSS — Ground reference |
| 引脚 28 | VCC — 3.3 V or 5 V supply |
| 引脚 29 | D0 — Data bus bit 0 |
| 引脚 30 | D1 — Data bus bit 1 |
| 引脚 31 | D2 — Data bus bit 2 |
| 引脚 32 | D3 — Data bus bit 3 |
| 引脚 33 | D4 — Data bus bit 4 |
| 引脚 34 | D5 — Data bus bit 5 |
| 引脚 35 | D6 — Data bus bit 6 |
| 引脚 36 | D7 — Data bus bit 7 |
| 引脚 37 | D8 — Data bus bit 8 |
| 引脚 38 | D9 — Data bus bit 9 |
| 引脚 39 | D10 — Data bus bit 10 |
| 引脚 40 | D11 — Data bus bit 11 |
| 引脚 41 | D12 — Data bus bit 12 |
| 引脚 42 | D13 — Data bus bit 13 |
| 引脚 43 | D14 — Data bus bit 14 |
| 引脚 44 | D15 — Data bus bit 15 |
| 引脚 45 | VSS — Ground reference |
| 引脚 46 | AS — Address Strobe |
| 引脚 47 | LDS — Lower Data Strobe |
| 引脚 48 | UDS — Upper Data Strobe |
| 引脚 49 | R/W — Read/Write control |
| 引脚 50 | DTACK — Data Transfer Acknowledge |
| 引脚 51 | BR — Bus Request |
| 引脚 52 | BG — Bus Grant |
| 引脚 53 | BGACK — Bus Grant Acknowledge |
| 引脚 54 | IPL0 — Interrupt Priority Level 0 |
| 引脚 55 | IPL1 — Interrupt Priority Level 1 |
| 引脚 56 | IPL2 — Interrupt Priority Level 2 |
| 引脚 57 | FC0 — Function Code 0 |
| 引脚 58 | FC1 — Function Code 1 |
| 引脚 59 | FC2 — Function Code 2 |
| 引脚 60 | RESET — Reset input |
| 引脚 61 | HALT — Halt input |
| 引脚 62 | CLK — Clock input |
| 引脚 63 | VCC — 3.3 V or 5 V supply |
| 引脚 64 | VSS — Ground reference |
典型应用
MC68SEC000AA20R2 适用于 6 应用s: Industrial Automation Controllers, Automotive Body and Chassis ECUs, Telecom Control Plane Processors, Point-of-Sale Terminals, Motor Control Front-Ends, Legacy M68000 System Upgrades.
Industrial Automation Controllers
The MC68SEC000AA20R2 fits industrial PLC and process controller designs thanks to its static HCMOS 32-bit core and proven M68000 instruction set. At 20 MHz the part delivers about 10 MIPS, enough for ladder-logic interpreters, PID loop control, and HMI drivers running concurrently without MMU overhead. The 24-bit address space (16 MB) accommodates a real-time OS plus large I/O maps for sensor aggregation. Unlike ARM Cortex-M alternatives, the SEC000 enables reuse of legacy M68000 control firmware without rewriting assembly routines. Place the part on a 64-QFP land pattern with local 0.1 uF decoupling near each VDD/VSS pair, and use the static operation to halt the clock during low-power scan cycles. The wide 3.3 V/5 V supply tolerance simplifies migration from older 5 V PLCs to 3.3 V modern designs on the same PCB, reducing redesign cost for industrial system upgrades.
推荐
Automotive Body and Chassis ECUs
Body control modules, instrument clusters, and chassis subsystems historically relied on the M68000 architecture, and the MC68SEC000AA20R2 extends that lineage into modern 3.3 V or 5 V body networks. The 20 MHz SEC000 executes body-control code for window lifters, climate control, seat controllers, and lighting systems with deterministic latency. Although the SEC000 itself is not AEC-Q100 qualified, it integrates cleanly into body ECUs where safety-critical functions are offloaded to separate ASIL-rated parts. The 64-QFP 14x14 mm package fits densely populated ECU boards, while the static core simplifies cold-crank handling by allowing clock stretching during voltage transients. The wide 3.3 V/5 V supply tolerance is an advantage versus single-voltage ARM Cortex-M alternatives that require a fixed-rail LDO. Engineers porting legacy M68000 body-control software can drop in the SEC000 with minimal code change.
推荐
Telecom Control Plane Processors
The MC68SEC000AA20R2 serves as a control-plane processor in low-cost telecom equipment such as line cards, subscriber boards, and protocol converters. At 20 MHz, the 32-bit datapath executes protocol-stack housekeeping tasks, while the static HCMOS core allows the clock to halt during idle periods for power savings. The 24-bit address space (16 MB) holds small RTOS plus protocol tables without paging. Unlike newer ARM SoCs, the SEC000 draws low quiescent current and tolerates 3.3 V/5 V supply variation that is common in legacy central-office equipment. Use the SEC000 alongside a UART for serial management, a watchdog timer for hang recovery, and an external flash for firmware storage. This combination delivers decades-proven reliability and avoids unnecessary firmware rewrites when extending legacy M68000 designs.
推荐
Point-of-Sale Terminals
POS terminals benefit from the MC68SEC000AA20R2's 32-bit M68000 architecture when cost and code reuse are priorities. The 20 MHz SEC000 handles payment-terminal mainline functions such as display updates, keypad scanning, card-reader handshakes, and receipt printing within deterministic timing budgets. The static core reduces power consumption between transactions, while the 64-QFP 14x14 mm package fits inside compact terminal enclosures. Legacy POS software written for the MC68EC000 requires minimal change to port to the SEC000, accelerating certification cycles. Connect the SEC000 to a magnetic-stripe reader via UART, a thermal printer via SPI bridge, and a customer-facing LCD via external bus controller. The 3.3 V/5 V supply tolerance simplifies integration with display modules that operate at different voltages, eliminating extra level shifters.
推荐
Motor Control Front-Ends
The MC68SEC000AA20R2 is well suited as the supervisory MPU in motor-control front-ends where a higher-performance DSP handles real-time loop math. The SEC000 runs the state machine, fault detection, communication stack, and Human-Machine Interface (HMI), while a dedicated DSP or FPGA implements field-oriented control loops. The 20 MHz M68000 core, 24-bit address space, and static HCMOS design tolerate harsh industrial environments and supply transients. Designers choose the SEC000 over an ARM Cortex-M here when reusing existing M68000 firmware or consolidating software maintenance across a product family. Place the 64-QFP footprint on a 4-layer PCB with a continuous ground plane and short traces to gate drivers. Add a MAX1304ECM/V+ to digitize phase-current feedback, and use the SEC000's general-purpose I/O for EN/BR/FAULT signalling to the inverter bridge.
推荐
Legacy M68000 System Upgrades
Designers replacing obsolete NMOS MC68000 parts use the MC68SEC000AA20R2 as a drop-in upgrade because it is pin-for-pin compatible with the MC68EC000 and software-compatible with the entire M68000 family. The HCMOS construction reduces power consumption by 60-80 percent versus the original NMOS MC68000, while the static core allows simpler clock generation. The 20 MHz speed grade delivers roughly four times the throughput of an 8 MHz MC68000, accelerating legacy code without recompilation. The 64-QFP 14x14 mm package replaces older DIP and PGA footprints, enabling modern SMT assembly while preserving the original system architecture. Pair the SEC000 with existing peripherals like the MC68681 DUART or MC68901 MFP without firmware rewrite, giving industrial and military customers a viable modernization path.
推荐
推荐产品汇总
工程参考数据： MC68SEC000AA20R2 ——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 | MC68SEC000AA10R2 | MC68SEC000AA16R2 | MC68SEC000AE10R2 | MC68SEC000CAE20R2 |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors - same | NXP Semiconductors - same | NXP Semiconductors - same | NXP Semiconductors - same |
| Package | 64-QFP (14x14 mm) | 64-QFP (14x14 mm) - same | 64-QFP (14x14 mm) - same | 64-QFP (14x14 mm) - same | 64-QFP (14x14 mm) - same |
| Maximum Clock Frequency | 20 MHz | 10 MHz (-50%) | 16 MHz (-20%) | 10 MHz (-50%) | 20 MHz (same) |
| Supply Voltage | 3.3 V / 5 V | 3.3 V / 5 V - same | 3.3 V / 5 V - same | 3.3 V / 5 V - same | 3.3 V / 5 V - same |
| Data Bus Width | 8/16/32-bit (16-bit external) | 8/16/32-bit (16-bit external) | 8/16/32-bit (16-bit external) | 8/16/32-bit (16-bit external) | 8/16/32-bit (16-bit external) |
| Address Space | 16 MB (24-bit) | 16 MB - same | 16 MB - same | 16 MB - same | 16 MB - same |
| RoHS Compliance | RoHS Compliant | RoHS Compliant | RoHS Compliant | RoHS Compliant | RoHS Compliant |
关键差异点
- Static HCMOS construction with pin-to-pin MC68EC000 compatibility （对比 MC68SEC000AA10R2)
- Wide 3.3 V / 5 V supply tolerance （对比 MC68SEC000CAE20R2)
- Tape-and-reel packaging for high-volume SMT assembly （对比 MC68SEC000AA20 (tray))
- Lowest-cost static entry into 32-bit M68000 family （对比 MC68HC000 (full 68000 with 8 MHz NMOS pin compatibility))
设计说明
Place 0.1 uF X7R ceramic decoupling capacitors within 5 mm of each VDD/VSS pair on the MC68SEC000AA20R2, and add a single 10 uF bulk tantalum or ceramic capacitor near the chip. The SEC000 has four VDD pins and four VSS pins spread across the 64-QFP package to optimize internal current distribution; bypassing each pair is critical because address and data bus switching at 20 MHz can inject significant di/dt into the supply. Estimated: the SEC000 draws roughly 50-80 mA at 20 MHz and 5 V, less than half the original NMOS MC68000.
Route the 24-bit address bus and 16-bit data bus with matched trace lengths on a 4-layer PCB with continuous ground plane. Keep trace lengths under 50 mm to avoid ringing at the 20 MHz edge rate, and use 33 ohm series termination near the MPU if the bus drives external connectors. Estimated: the rise/fall time of the SEC000's HCMOS outputs is roughly 3-5 ns, so impedance-controlled traces of 50 ohms are recommended.
Do not assume the MC68SEC000AA20R2 is AEC-Q100 qualified; this part targets industrial and consumer M68000 designs, not safety-critical automotive ECUs. For automotive body and chassis subsystems where the SEC000 architecture is preferred, evaluate AEC-Q100 parts separately or implement safety isolation external to the SEC000. Also avoid direct drop-in replacement of NMOS MC68000 designs without checking bus-timing expectations; the HCMOS SEC000 has faster edge rates and tighter timing margins than the original NMOS device.
Use DTACK-based wait-state generation for slow peripherals instead of stretching the SEC000 clock indefinitely. Although the part is static, prolonged clock stretching at sub-1 Hz can cause leakage-related issues on some derivatives, and a proper DTACK handshake keeps bus arbitration healthy when bus masters share the address/data bus. Also place 4.7 kohm pull-up resistors on open-drain outputs such as HALT and BGACK to define idle states during reset.
The 64-QFP 14x14 mm package has an estimated theta_JA of approximately 50 C/W in still air and 35 C/W with moderate airflow, so typical SEC000 dissipation (60-100 mA at 3.3 V) yields a junction temperature rise of only 1-2 C above ambient. Estimated: at 5 V and 25 C ambient, junction temperature rise is roughly 5-8 C, well below the 150 C maximum; no heatsink is required for the SEC000 in any standard application.
合规信息
RoHS Compliant and Lead Free per DigiKey product page. AEC-Q100 not specified; this part is not automotive-qualified. REACH and conflict-mineral declarations are not explicitly stated in the verified web data.