MC68SEC000AE20 - 20MHz Static 32-bit MPU, 64-LQFP | NXP Semiconductors
MPN: MC68SEC000AE20 ✗ סוף ייצורMC68SEC000AE20 סקירה
A microprocessor (MPU) is a CPU-centric integrated circuit that requires external memory (RAM, ROM/Flash) and peripheral glue logic to form a complete computer system, in contrast to a microcontroller (MCU) which integrates memory and peripherals on-chip. The MC68SEC000 sits in the M68K family hierarchy: EC000 -> MC68000 -> ColdFire -> modern Power Architecture, with each generation preserving software compatibility at the instruction-set level. As a member of the power management / processing category, this static MPU enables low-power designs in industrial control, automotive, and embedded systems where deterministic clock gating is required.
Key features of the MC68SEC000AE20 include 32-bit internal data paths, a 24-bit address bus (16 MB linear address space), a 16-bit external data bus, eight 32-bit general-purpose data registers, seven 32-bit address registers, six internal interrupt levels plus a non-maskable interrupt, a static CMOS process for low quiescent current, and TTL-compatible I/O. The 20 MHz clock rate sustains approximately 2 MIPS of sustained throughput for typical instruction mixes, while full static operation allows designers to halt the clock in sleep mode to minimize power in battery-backed applications.
Architecturally, the MC68SEC000 uses a microcoded M68K instruction pipeline with prefetch and bus arbitration logic, supporting vectored autovector interrupts, supervisor/user privilege levels, and Motorola peripheral bus cycles. Compared with the original MC68000, the SEC000 variant retains software compatibility while adding fully-static operation, allowing clock frequencies to be reduced to DC for true standby. Compared with the original CMOS MC68HC000, the SEC000 further trims power by removing dynamic refresh requirements, making it suitable for portable or solar-powered embedded products.
Typical applications include industrial automation controllers, point-of-sale terminals, medical instrumentation front-ends, automotive body and chassis ECUs (with external watchdog), legacy 16-bit bus peripheral hubs, and educational microprocessor training platforms. The 64-LQFP package also makes the part straightforward to assemble on standard SMT lines and rework on existing 68SEC000 designs.
When designing with the MC68SEC000AE20, ensure that asynchronous bus cycles are correctly terminated and that the static clock can be gated in software or via an external power-management controller to take full advantage of the device's low-power standby capability. Pairing the MPU with a TTL bus transceivers and a hardware watchdog supervisor is recommended for safety-critical applications.
This page synthesizes distributor stock, pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
חלופות תחליף ישיר עבור MC68SEC000AE20 — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם MC68SEC000AE20 (אותו גורם צורה וטביעת רגל) — שונים ב Address Bus Width, Data Bus Width, Internal Registers, Interrupt Levels, Maximum Clock Frequency.
MC68SEC000AE10
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
MC68SEC000AE16
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←MC68SEC000AE20R
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
MC68EC000AE20
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
MC68HC000AE20
✅ Drop-In ⚠️ מפרטים לא מאומתים📋 חלופה להתייחסות (לא בקטלוג)
MC68SEC000AE20
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←MC68SEC000AE20 דירוגים מרביים ומאפיינים חשמליים
| Core | M680x0 EC000 |
| Number of Cores | 1 |
| רוחב אפיק נתונים | 32-bit (16-bit external) |
| Instruction Set Architecture | M68K / 68000 family |
| תדר שעון מקסימלי | 20 MHz |
| Operating Voltage | 5 V |
| Address Bus Width | 24-bit (16 MB address space) |
| Operating Mode | Static (clock may be halted to DC) |
| Internal Registers | 8 x 32-bit data + 7 x 32-bit address |
| Interrupt Levels | 6 internal + 1 NMI (7 total) |
| מארז | 64-LQFP (10x10 mm) |
| סוג הרכבה | Surface Mount |
| Process Technology | CMOS |
תצורת פינים של MC68SEC000AE20
| פין 1 | VCC — +5V power supply |
| פין 2 | D8 — Data bus bit 8 |
| פין 3 | D9 — Data bus bit 9 |
| פין 4 | D10 — Data bus bit 10 |
| פין 5 | D11 — Data bus bit 11 |
| פין 6 | D12 — Data bus bit 12 |
| פין 7 | D13 — Data bus bit 13 |
| פין 8 | D14 — Data bus bit 14 |
| פין 9 | D15 — Data bus bit 15 |
| פין 10 | GND — Ground |
| פין 11 | A1 — Address bus bit 1 |
| פין 12 | A2 — Address bus bit 2 |
| פין 13 | A3 — Address bus bit 3 |
| פין 14 | A4 — Address bus bit 4 |
| פין 15 | A5 — Address bus bit 5 |
| פין 16 | A6 — Address bus bit 6 |
| פין 17 | A7 — Address bus bit 7 |
| פין 18 | A8 — Address bus bit 8 |
| פין 19 | A9 — Address bus bit 9 |
| פין 20 | A10 — Address bus bit 10 |
| פין 21 | A11 — Address bus bit 11 |
| פין 22 | A12 — Address bus bit 12 |
| פין 23 | A13 — Address bus bit 13 |
| פין 24 | A14 — Address bus bit 14 |
| פין 25 | A15 — Address bus bit 15 |
| פין 26 | A16 — Address bus bit 16 |
| פין 27 | A17 — Address bus bit 17 |
| פין 28 | A18 — Address bus bit 18 |
| פין 29 | A19 — Address bus bit 19 |
| פין 30 | A20 — Address bus bit 20 |
| פין 31 | A21 — Address bus bit 21 |
| פין 32 | A22 — Address bus bit 22 |
| פין 33 | A23 — Address bus bit 23 |
| פין 34 | GND — Ground |
| פין 35 | AS — Address Strobe (active low) |
| פין 36 | UDS — Upper Data Strobe (active low) |
| פין 37 | LDS — Lower Data Strobe (active low) |
| פין 38 | R/W — Read/Write (1=Read, 0=Write) |
| פין 39 | DTACK — Data Transfer Acknowledge (active low) |
| פין 40 | BR — Bus Request (active low) |
| פין 41 | BG — Bus Grant (active low) |
| פין 42 | BGACK — Bus Grant Acknowledge (active low) |
| פין 43 | FC0 — Function Code bit 0 |
| פין 44 | FC1 — Function Code bit 1 |
| פין 45 | FC2 — Function Code bit 2 |
| פין 46 | IPL0 — Interrupt Priority Level bit 0 |
| פין 47 | IPL1 — Interrupt Priority Level bit 1 |
| פין 48 | IPL2 — Interrupt Priority Level bit 2 |
| פין 49 | CLK — Clock input |
| פין 50 | GND — Ground |
| פין 51 | RESET — Reset (active low) |
| פין 52 | HALT — Halt (active low) |
| פין 53 | E — Enable clock output (E clock) |
| פין 54 | VPA — Valid Peripheral Address (active low) |
| פין 55 | VMA — Valid Memory Address (active low) |
| פין 56 | D0 — Data bus bit 0 |
| פין 57 | D1 — Data bus bit 1 |
| פין 58 | D2 — Data bus bit 2 |
| פין 59 | D3 — Data bus bit 3 |
| פין 60 | D4 — Data bus bit 4 |
| פין 61 | D5 — Data bus bit 5 |
| פין 62 | D6 — Data bus bit 6 |
| פין 63 | D7 — Data bus bit 7 |
| פין 64 | VCC — +5V power supply |
יישומים טיפוסיים
MC68SEC000AE20 מתאים עבור 6 יישוםs: Industrial Automation Controllers, Point-of-Sale (POS) Terminals, Medical Instrumentation Front-Ends, Automotive Body and Chassis ECUs, Legacy 16-bit Bus Peripheral Hubs, Educational Microprocessor Training Platforms.
Industrial Automation Controllers
The MC68SEC000AE20 fits industrial automation controllers because its 20 MHz M68K core delivers approximately 2 MIPS with deterministic 7-level vectored interrupts (6 internal + NMI), supporting responsive control loops on PLCs and CNC front-ends. Its TTL-compatible I/O interfaces directly with 5V industrial peripheral logic - optocouplers, 24V I/O transceivers, and legacy HMI displays - without level-shifters. The 24-bit address bus (16 MB linear) accommodates program Flash and parameter storage typical of machine controllers, while supervisor/user privilege modes support a protected real-time operating layer. Compared with newer ARM Cortex-M MCUs, the SEC000 brings M68K code reuse to factories that already run 68K firmware on existing equipment.
מומלץ
Point-of-Sale (POS) Terminals
The MC68SEC000AE20 suits POS terminals where 32-bit M68K software compatibility, deterministic interrupt response, and low standby power are essential. The static CMOS design allows the clock to be halted during payment-card reader idle periods, dropping quiescent current dramatically and extending battery-backed UPS runtime. The 16-bit external data bus and 24-bit address bus handle graphic LCD framebuffers, thermal-printer buffers, and secure-key storage without external bus expansion. TTL-compatible I/O talks directly to legacy magnetic-stripe readers, keypads, and receipt printers common in retail equipment.
מומלץ
Medical Instrumentation Front-Ends
The MC68SEC000AE20 is appropriate for medical instrumentation front-ends requiring deterministic 32-bit control and long product lifecycles. The static CMOS core supports clock gating between patient-sample acquisitions, lowering thermal dissipation in bedside enclosures where low surface temperature matters. Supervisor/user privilege modes allow isolated firmware regions for safety-critical routines, and the 7-level vectored interrupt structure handles prioritized tasks from analog front-ends, keypad input, and display updates. The 64-LQFP package enables reliable SMT assembly on medical-grade PCBs that must withstand autoclave or sterilization exposure in adjacent production lines.
מומלץ
Automotive Body and Chassis ECUs
The MC68SEC000AE20 targets automotive body and chassis ECUs (door modules, climate control, instrument clusters) where M68K software compatibility, low quiescent draw during ignition-off, and 5V TTL I/O compatibility with legacy sensors are valued. The static core allows the clock to be stopped during vehicle parked state, dropping standby power so the ECU does not drain the 12V battery over weeks of inactivity. The 16-bit external bus and 24-bit address space handle body-controller firmware plus calibration tables, while the 7-level interrupt structure prioritizes CAN/LIN transceivers, sensor inputs, and actuator PWM. For new designs, an external watchdog supervisor and CAN transceiver are mandatory companions.
מומלץ
Legacy 16-bit Bus Peripheral Hubs
The MC68SEC000AE20 serves as a hub controller in legacy 16-bit bus peripheral systems, including industrial I/O concentrators and data-acquisition front-ends that already use the M68K ISA. Its 16-bit external data bus matches the width of legacy peripheral ASICs, eliminating the need for bus-width translation glue logic. The 24-bit address bus supports direct mapping of peripheral register windows in a 16 MB address space without bank-switching. The 20 MHz clock sustains high-throughput DMA-style data movement, and the static design permits clock-frequency scaling for power-sensitive backplane applications.
מומלץ
Educational Microprocessor Training Platforms
The MC68SEC000AE20 is widely used in university microprocessor training platforms because its M68K ISA, 16-bit external bus, and 7-level interrupt structure teach foundational concepts (supervisor/user modes, vectored autovectors, asynchronous bus cycles) that map cleanly onto later ColdFire and ARM designs. The static CMOS core allows instructors to single-step clock cycles on lab trainers, demonstrating pipeline and bus-arbitration behavior visually. The 64-LQFP package is breadboard-friendly via breakout PCBs, and the well-documented NXP datasheet simplifies lab exercises on assembly-language programming and memory interfacing. Course labs typically pair the part with SRAM, ROM/EPROM, and a 68540-style peripheral controller for complete system exploration.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור MC68SEC000AE20 — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | MC68SEC000AE10 | MC68SEC000AE16 | MC68EC000AE20 | MC68HC000AE20 | MC68SEC000AE20 (Freescale) |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | Freescale Semiconductor |
| Package | 64-LQFP (10x10) | 64-LQFP (10x10) - same | 64-LQFP (10x10) - same | 64-LQFP (10x10) - same | 64-LQFP (10x10) - same | 64-LQFP (10x10) - same |
| Maximum Clock Frequency | 20 MHz | 10 MHz | 16 MHz | 20 MHz | 20 MHz | 20 MHz |
| Core | EC000 static CMOS | EC000 static CMOS | EC000 static CMOS | EC000 non-static | HC000 non-static | EC000 static CMOS |
| Data Bus Width (external) | 16-bit | 16-bit | 16-bit | 16-bit | 16-bit | 16-bit |
| Address Bus Width | 24-bit | 24-bit | 24-bit | 24-bit | 24-bit | 24-bit |
| Static Operation (clock-stop-at-DC) | Yes | Yes | Yes | No | No | Yes |
| Operating Voltage | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete (Rochester stock) |
מבדילים עיקריים
- Fully-static CMOS with clock-stop-at-DC capability (לעומתMC68EC000AE20)
- Lowest-cost 32-bit MPU in NXP's M68K family (לעומתMC68HC000AE20)
- 20 MHz grade available for highest-throughput static designs (לעומתMC68SEC000AE16)
הערות תכנון
Estimated: at 20 MHz and 5V with all 16 data lines and 23 address lines switching on every bus cycle, the MC68SEC000AE20 typically draws 50-80 mA dynamic current. During static (clock-stopped) standby, current falls to single-digit mA for the CMOS core. To maximize standby savings, gate the CLK pin from a power-management controller and ensure RESET is properly sequenced before re-enabling the clock. Decouple VCC with 0.1uF ceramic + 10uF bulk placed within 5 mm of each VCC pin.
Route the asynchronous control signals (AS, UDS, LDS, DTACK, R/W, BR/BG/BGACK) with matched trace lengths to within 25 mm and avoid crossing the CLK trace. The E clock output is a free-running derivative of CLK - keep its trace short or series-terminate at 33 ohm to prevent overshoot on long backplane traces. Place the external SRAM/ROM and bus transceivers within 50 mm trace length to keep bus round-trip delays within the 4-clock asynchronous access budget.
Do not drive the FC0-FC2 pins to user-mode values during reset initialization; the MC68SEC000AE20 samples the function-code pins during reset to determine initial SSP and PC fetch address space, and an invalid combination can trap the CPU. Always pair the part with an external MAX705/MAX706-class voltage supervisor - the SEC000 has no internal POR for brownout below 4.5V. Confirm the HALT/RESET timing matches the datasheet's 100 ms reset-pulse minimum to avoid incomplete internal-state initialization.
Estimated: at 5V x 70 mA, the dynamic dissipation is approximately 350 mW; with theta_JA near 50 C/W for the 64-LQFP, the junction-to-ambient temperature rise is roughly 17.5 C. Thermal management is rarely a concern at full duty cycle, but designers should still provide a continuous ground plane under the part and avoid placing heat-generating passives within 5 mm of the package to keep junction temperature well below the 150 C maximum.
מידע על תאימות
Compliance status not present in the verified web data; set to 'unknown' per data authenticity rules. Part is obsolete per NXP product page.