MC68711E20CFNE3 - 8-Bit HC11 MCU, 20KB OTP, 52-PLCC | NXP
MPN: MC68711E20CFNE3 ✗ انتهى عمره الإنتاجيMC68711E20CFNE3 نظرة عامة
What is an 8-bit microcontroller? An 8-bit MCU is a microprocessor with an 8-bit data bus width that integrates CPU, memory (ROM/RAM/EPROM/EEPROM), and peripherals on a single silicon die. The HC11 (High-performance CMOS 11) family from Motorola/Freescale/NXP extends the classic M68HC11 architecture with a fully static design, high-density CMOS process, and a rich peripheral set including timers, serial interfaces, and analog subsystems. In the broader taxonomy, the MC68711E20CFNE3 sits within microcontroller -> 8-bit MCU -> HC11 family -> OTP-programmable E-series sub-family, ultimately under the umbrella of embedded semiconductor devices.
Key features include 20 KB OTP EPROM for code storage, 768 bytes RAM for data, 512 bytes EEPROM for non-volatile parameter storage, an 8-channel 8-bit ADC, and 38 digital I/O lines supporting interrupts and wake-up functions. The fully static design allows operation at clock speeds from DC to 3 MHz, supporting low-power sleep modes that are critical for battery-backed industrial installations.
Architecturally, the E-series uses a CISC instruction set with multiple addressing modes optimized for compiler efficiency and compact code density. The integrated peripherals include a 16-bit free-running timer, an asynchronous serial communications interface (SCI), a synchronous serial peripheral interface (SPI), and a pulse-width modulation subsystem. The internal 512-byte EEPROM provides byte-erasable non-volatile storage ideal for configuration data and runtime calibration.
Typical applications include industrial motor control, automotive body electronics, security and access control systems, point-of-sale terminals, and legacy embedded controllers where continued 68HC11 software compatibility is required. Designers familiar with M68HC11 assembly and C toolchains can port existing firmware with minimal effort. When designing with this port, note the End of Life status: prototype and maintenance builds should be sourced from authorized distributors holding remaining inventory, or migration to an active HC11 or S08 successor should be evaluated before new designs enter production.
This page synthesizes distributor pricing, drop-in OTP-programmable 68HC11E alternatives, and practical design notes drawn from the NXP datasheet and reference documentation, providing information beyond what the manufacturer datasheet alone delivers.
بدائل مباشرة لـ MC68711E20CFNE3 — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع MC68711E20CFNE3 (نفس عامل الشكل والبصمة) — يختلف في Core Architecture, Mounting Type, Operating Temperature, Package, Data Bus Width.
MC68HC711E20CFN3
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
MC68711E20CFNE2
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←MC68HC11E1CFNE3R
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←MC68711E20VFNE2
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
MC68HCP11E1CFNE3
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
MC68711E20CFNE3 الحدود القصوى والخصائص الكهربائية
| Core Architecture | M68HC11 (8-bit CISC) |
| Family | 68HC11E (E-series, OTP) |
| Clock Frequency (max) | 3 MHz |
| Program Memory | 20 KB OTP EPROM |
| RAM | 768 bytes |
| EEPROM | 512 bytes |
| جهد التغذية | 4.5 V to 5.5 V |
| درجة حرارة التشغيل | -40 to +85 C |
| I/O Pins | 38 |
| ADC | 8-channel, 8-bit |
| Timers | 16-bit free-running timer with capture/compare |
| Serial Interfaces | SCI (UART), SPI |
| العلبة | 52-PLCC (19.1 x 19.1 mm) |
| نوع التركيب | Surface Mount (J-Lead) |
| حالة دورة الحياة | End of Life (per NXP product page) |
تكوين أطراف MC68711E20CFNE3
| دبوس 1 | VSS — Ground reference |
| دبوس 2 | MODB/VSTBY — Mode select B / RAM standby power |
| دبوس 3 | MODA/LIR — Mode select A / load instruction register |
| دبوس 4 | RESET — Active-low reset input |
| دبوس 5 | XIRQ — Non-maskable interrupt input |
| دبوس 6 | IRQ — Maskable interrupt request |
| دبوس 7 | PA7/OC1 — Port A bit 7 / Timer output compare 1 |
| دبوس 8 | PA6/OC2 — Port A bit 6 / Timer output compare 2 |
| دبوس 9 | PA5/OC3 — Port A bit 5 / Timer output compare 3 |
| دبوس 10 | PA4/OC4 — Port A bit 4 / Timer output compare 4 |
| دبوس 11 | PA3/OC5 — Port A bit 3 / Timer output compare 5 |
| دبوس 12 | PA2/IC1 — Port A bit 2 / Timer input capture 1 |
| دبوس 13 | PA1/IC2 — Port A bit 1 / Timer input capture 2 |
| دبوس 14 | PA0/IC3 — Port A bit 0 / Timer input capture 3 |
| دبوس 15 | VRL — ADC low reference voltage |
| دبوس 16 | VRH — ADC high reference voltage |
| دبوس 17 | PE7/AN7 — Port E bit 7 / ADC analog input 7 |
| دبوس 18 | PE6/AN6 — Port E bit 6 / ADC analog input 6 |
| دبوس 19 | PE5/AN5 — Port E bit 5 / ADC analog input 5 |
| دبوس 20 | PE4/AN4 — Port E bit 4 / ADC analog input 4 |
| دبوس 21 | PE3/AN3 — Port E bit 3 / ADC analog input 3 |
| دبوس 22 | PE2/AN2 — Port E bit 2 / ADC analog input 2 |
| دبوس 23 | PE1/AN1 — Port E bit 1 / ADC analog input 1 |
| دبوس 24 | PE0/AN0 — Port E bit 0 / ADC analog input 0 |
| دبوس 25 | PD5/SS — Port D bit 5 / SPI slave select |
| دبوس 26 | PD4/SCK — Port D bit 4 / SPI serial clock |
| دبوس 27 | PD3/MOSI — Port D bit 3 / SPI master-out / SCI TxD alt |
| دبوس 28 | PD2/MISO — Port D bit 2 / SPI master-in / SCI RxD alt |
| دبوس 29 | PD1/TxD — Port D bit 1 / SCI transmit data |
| دبوس 30 | PD0/RxD — Port D bit 0 / SCI receive data |
| دبوس 31 | PC7 — Port C bit 7 (address/data in expanded modes) |
| دبوس 32 | PC6 — Port C bit 6 (address/data in expanded modes) |
| دبوس 33 | PC5 — Port C bit 5 (address/data in expanded modes) |
| دبوس 34 | PC4 — Port C bit 4 (address/data in expanded modes) |
| دبوس 35 | PC3 — Port C bit 3 (address/data in expanded modes) |
| دبوس 36 | PC2 — Port C bit 2 (address/data in expanded modes) |
| دبوس 37 | PC1 — Port C bit 1 (address/data in expanded modes) |
| دبوس 38 | PC0 — Port C bit 0 (address/data in expanded modes) |
| دبوس 39 | PB7 — Port B bit 7 (output compare / address strobe) |
| دبوس 40 | PB6 — Port B bit 6 (output compare / address strobe) |
| دبوس 41 | PB5 — Port B bit 5 (output compare / address strobe) |
| دبوس 42 | PB4 — Port B bit 4 (output compare / address strobe) |
| دبوس 43 | PB3 — Port B bit 3 (output compare) |
| دبوس 44 | PB2 — Port B bit 2 (output compare) |
| دبوس 45 | PB1 — Port B bit 1 (output compare) |
| دبوس 46 | PB0 — Port B bit 0 (output compare) |
| دبوس 47 | EXTAL — External crystal / clock input |
| دبوس 48 | XTAL — Crystal oscillator output |
| دبوس 49 | VDD — Positive supply (5 V) |
| دبوس 50 | E — E clock output (system clock) |
| دبوس 51 | STRA/AS — Strobe A / address strobe |
| دبوس 52 | STRB/R/W — Strobe B / read-write strobe |
التطبيقات النموذجية
MC68711E20CFNE3 مناسب لـ 6 التطبيقs: Industrial Motor Control, Automotive Body Electronics, Security and Access Control Panels, Point-of-Sale Terminals, Industrial Sensor Hubs, Legacy Embedded Control Boards.
Industrial Motor Control
The MC68711E20CFNE3's 16-bit free-running timer with input capture and output compare makes it well suited for closed-loop motor speed and position control in industrial drives. Its 38 I/O lines can drive H-bridge enable signals and read Hall-effect or encoder feedback, while the 8-channel 8-bit ADC samples current shunts for torque regulation. Operating from 4.5 V to 5.5 V at temperatures up to +85 C, it tolerates factory-floor supply noise when paired with adequate decoupling. The 20 KB OTP EPROM holds a real-time control loop in C or assembly with minimal overhead, and 512 bytes of EEPROM store calibration constants and learned parameters across power cycles. Engineers porting legacy 68HC11 firmware can drop this OTP device into the same 52-PLCC footprint as the original masked-ROM controller, avoiding PCB rework.
موصى به
Automotive Body Electronics
Although automotive-grade (AEC-Q100) qualification is not stated in the verified data, the MC68711E20CFNE3's industrial -40 C to +85 C range and 5 V tolerance fit many body-electronics modules such as seat controllers, mirror adjusters, and lighting drivers. Its SCI (UART) and SPI peripherals support LIN-bus transceivers and LED matrix drivers, while the 8-bit ADC reads potentiometer wiper positions for analog trim inputs. The 512-byte EEPROM retains user preferences (seat position, mirror presets) through battery disconnects. Designers favor the 52-PLCC package for through-hole-friendly vibration resistance in chassis-mounted enclosures. Migration to the MC9S08 family is recommended for new platforms, but for service-repair and last-time-buy programs, the MC68711E20CFNE3 remains a credible body-module controller.
موصى به
Security and Access Control Panels
The MC68711E20CFNE3 is a natural fit for security panels, keypads, and access-control readers where deterministic firmware response, EEPROM-backed credential storage, and low quiescent current are mandatory. Its 20 KB OTP EPROM stores the panel state machine, while 512 bytes of EEPROM retain user credentials and event logs through power-loss events. The HC11's IRQ and XIRQ pins support immediate response to door sensors, tamper switches, and panic buttons, and the SCI/SPI interfaces link to RFID readers, mag-stripe heads, and downstream Wiegand card readers. With its 5 V supply tolerance, it integrates directly with legacy alarm-bus peripherals without level shifting. Long-term installed bases benefit from the part's enduring software toolchain (HiWave, Cosmic, ImageCraft) and the wide availability of 68HC11 reference designs.
موصى به
Point-of-Sale Terminals
POS terminals and electronic cash registers rely on the MC68711E20CFNE3's mix of 5 V tolerance, EEPROM-backed transaction logs, and flexible serial peripherals to drive keyboards, displays, and magnetic-stripe readers. The 38 I/O lines scan matrix keypads and multiplex seven-segment or LCD character displays, while the SCI (UART) talks to external printers and modems. The 8-bit ADC monitors battery voltage for graceful shutdown on retail-counter power events. With 768 bytes of RAM, the controller can buffer small transaction packets before forwarding to a back-office host over SPI or SCI. The 52-PLCC package simplifies field service by allowing socketed replacements, reducing repair time on deployed terminals.
موصى به
Industrial Sensor Hubs
The MC68711E20CFNE3 acts as a low-cost sensor aggregator in industrial environments, reading 4-20 mA loops, thermistors, and digital switches through its 8-channel ADC and digital I/O. The SCI peripheral streams aggregated readings to a supervisory PLC, while the SPI bus drives local LED status indicators or expansion EEPROM. With 38 I/O lines, a single MC68711E20CFNE3 can fan-in eight analog sensors and twenty digital points, replacing discrete logic in legacy process-control cabinets. Its 4.5 V to 5.5 V supply aligns with industrial 5 V rails, and its -40 C to +85 C operating range handles unheated control rooms. The on-chip 512-byte EEPROM stores sensor calibration and node identity.
موصى به
Legacy Embedded Control Boards
Many long-life industrial, military, and aerospace support programs continue to specify the MC68711E20CFNE3 for spare-part and field-replacement purposes, where re-validation cost dominates BOM savings. The 52-PLCC socket footprint allows field technicians to swap controllers without desoldering, supporting decades-long service intervals. The HC11 architecture's deterministic execution, mature toolchain, and abundant reference codebases keep it attractive for legacy avionics, train-control, and shipboard subsystems. Although NXP marks the part EOL, remaining distributor inventory supports repair operations through the 2030s. Designers of these platforms should plan a controlled migration to an active S08 or Kinetis successor.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ MC68711E20CFNE3 — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | MC68HC711E20CFN3 | MC68711E20CFNE2 | MC68HC11E1CFNE3R | MC68711E20VFNE2 | MC68HCP11E1CFNE3 |
|---|---|---|---|---|---|---|
| Package | 52-PLCC (19.1 x 19.1 mm) | 52-PLCC - same | 52-PLCC - same | 52-PLCC - same | 52-PLCC - same | 52-PLCC - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core | M68HC11 (8-bit) | M68HC11 (8-bit) | M68HC11 (8-bit) | M68HC11 (8-bit) | M68HC11 (8-bit) | M68HC11 (8-bit, low-power) |
| Clock Frequency (max) | 3 MHz | 3 MHz | 3 MHz | 3 MHz | 3 MHz | 3 MHz |
| Program Memory | 20 KB OTP EPROM | 20 KB OTP EPROM | 20 KB OTP EPROM | 20 KB Masked ROM (factory) | 20 KB OTP EPROM | 20 KB OTP EPROM |
| RAM | 768 bytes | 768 bytes | 768 bytes | 768 bytes | 768 bytes | 768 bytes |
| EEPROM | 512 bytes | 512 bytes | 512 bytes | 512 bytes | 512 bytes | 512 bytes |
| User Code Storage | Yes (OTP) | Yes (OTP) | Yes (OTP) | No (factory-masked ROM only) | Yes (OTP) | Yes (OTP) |
أبرز الفروقات
- User-programmable OTP EPROM (مقابلMC68HC11E1CFNE3R)
- Standard 5 V industrial supply range (مقابلMC68HCP11E1CFNE3)
- Same-family migration path within the 52-PLCC footprint (مقابلMC68711E20CFNE2)
ملاحظات التصميم
Provide a stable 5 V (+/-10%) supply to the MC68711E20CFNE3, with at least a 0.1 uF ceramic decoupling capacitor placed within 5 mm of the VDD pin and a bulk 10 uF electrolytic on the same 5 V rail. The internal analog circuitry (ADC, POR) is sensitive to VDD ripple; route the analog VRL/VRH references through a low-pass filter (10 ohm + 0.1 uF) to attenuate digital switching noise. The MODB/VSTBY pin may be tied to a separate backup supply for RAM retention; if unused, connect it directly to VDD per the NXP HC11E datasheet.
The 52-PLCC footprint requires J-lead pads on a 1.27 mm (50 mil) pitch with a central thermal/exposed pad area for mechanical stability. Keep the EXTAL/XTAL crystal traces short (<10 mm) and guard them with a ground ring to reduce EMI pickup on the on-chip oscillator. Place the RESET pull-up resistor (typically 4.7 kohm) close to the RESET pin, and add a 1 nF capacitor to ground for noise immunity in industrial environments.
Do not exceed the absolute maximum supply voltage of 7 V on VDD or apply voltage to any pin before VDD is stable - the HC11E lacks internal ESD clamping sufficient for hot-plug events. Avoid driving Port C pins above 0.5 mA per pin to prevent long-term reliability degradation. When migrating firmware from masked-ROM to OTP variants, verify that the EEPROM programming routine's VDD requirement (typically +5 V for byte-erase) is met - low-voltage HCP variants such as MC68HCP11E1CFNE3 need a charge pump to program EEPROM at 3 V operation.
معلومات الامتثال
RoHS, REACH, lead-free, and halogen-free status not stated in verified NXP product page or distributor listings; mark as unknown per Data Authenticity Rules. The part is End of Life per the NXP product page (verified October 2026).
