MC68711E20CFNE3 - 8-Bit HC11 MCU, 20KB OTP, 52-PLCC | NXP
Référence : MC68711E20CFNE3 ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $35.34 | $35,34 |
| 10 | $32.5 | $325,00 |
| 100 | $28.9 | $2 890,00 |
| 500 | $25.4 | $12 700,00 |
| 1 000 | $22.75 | $22 750,00 |
MC68711E20CFNE3 Présentation
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.
Alternatives de remplacement direct pour MC68711E20CFNE3 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec MC68711E20CFNE3 (même facteur de forme et même empreinte) — différant par Core Architecture, Mounting Type, Operating Temperature, Package, Data Bus Width.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
MC68HC711E20CFN3
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MC68711E20CFNE2
✅ Remplacement direct✓ En stock
$13.2 / unité
Voir la fiche technique →MC68HC11E1CFNE3R
✅ Remplacement direct✓ En stock
$9.8 / unité
Voir la fiche technique →MC68711E20VFNE2
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MC68HCP11E1CFNE3
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MC68711E20CFNE3 Valeurs maximales et caractéristiques électriques
| 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 |
| Tension d'alimentation | 4.5 V to 5.5 V |
| Température de fonctionnement | -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 |
| Boîtier | 52-PLCC (19.1 x 19.1 mm) |
| Type de montage | Surface Mount (J-Lead) |
| Statut du cycle de vie | End of Life (per NXP product page) |
Configuration des broches de MC68711E20CFNE3
| Broche 1 | VSS — Ground reference |
| Broche 2 | MODB/VSTBY — Mode select B / RAM standby power |
| Broche 3 | MODA/LIR — Mode select A / load instruction register |
| Broche 4 | RESET — Active-low reset input |
| Broche 5 | XIRQ — Non-maskable interrupt input |
| Broche 6 | IRQ — Maskable interrupt request |
| Broche 7 | PA7/OC1 — Port A bit 7 / Timer output compare 1 |
| Broche 8 | PA6/OC2 — Port A bit 6 / Timer output compare 2 |
| Broche 9 | PA5/OC3 — Port A bit 5 / Timer output compare 3 |
| Broche 10 | PA4/OC4 — Port A bit 4 / Timer output compare 4 |
| Broche 11 | PA3/OC5 — Port A bit 3 / Timer output compare 5 |
| Broche 12 | PA2/IC1 — Port A bit 2 / Timer input capture 1 |
| Broche 13 | PA1/IC2 — Port A bit 1 / Timer input capture 2 |
| Broche 14 | PA0/IC3 — Port A bit 0 / Timer input capture 3 |
| Broche 15 | VRL — ADC low reference voltage |
| Broche 16 | VRH — ADC high reference voltage |
| Broche 17 | PE7/AN7 — Port E bit 7 / ADC analog input 7 |
| Broche 18 | PE6/AN6 — Port E bit 6 / ADC analog input 6 |
| Broche 19 | PE5/AN5 — Port E bit 5 / ADC analog input 5 |
| Broche 20 | PE4/AN4 — Port E bit 4 / ADC analog input 4 |
| Broche 21 | PE3/AN3 — Port E bit 3 / ADC analog input 3 |
| Broche 22 | PE2/AN2 — Port E bit 2 / ADC analog input 2 |
| Broche 23 | PE1/AN1 — Port E bit 1 / ADC analog input 1 |
| Broche 24 | PE0/AN0 — Port E bit 0 / ADC analog input 0 |
| Broche 25 | PD5/SS — Port D bit 5 / SPI slave select |
| Broche 26 | PD4/SCK — Port D bit 4 / SPI serial clock |
| Broche 27 | PD3/MOSI — Port D bit 3 / SPI master-out / SCI TxD alt |
| Broche 28 | PD2/MISO — Port D bit 2 / SPI master-in / SCI RxD alt |
| Broche 29 | PD1/TxD — Port D bit 1 / SCI transmit data |
| Broche 30 | PD0/RxD — Port D bit 0 / SCI receive data |
| Broche 31 | PC7 — Port C bit 7 (address/data in expanded modes) |
| Broche 32 | PC6 — Port C bit 6 (address/data in expanded modes) |
| Broche 33 | PC5 — Port C bit 5 (address/data in expanded modes) |
| Broche 34 | PC4 — Port C bit 4 (address/data in expanded modes) |
| Broche 35 | PC3 — Port C bit 3 (address/data in expanded modes) |
| Broche 36 | PC2 — Port C bit 2 (address/data in expanded modes) |
| Broche 37 | PC1 — Port C bit 1 (address/data in expanded modes) |
| Broche 38 | PC0 — Port C bit 0 (address/data in expanded modes) |
| Broche 39 | PB7 — Port B bit 7 (output compare / address strobe) |
| Broche 40 | PB6 — Port B bit 6 (output compare / address strobe) |
| Broche 41 | PB5 — Port B bit 5 (output compare / address strobe) |
| Broche 42 | PB4 — Port B bit 4 (output compare / address strobe) |
| Broche 43 | PB3 — Port B bit 3 (output compare) |
| Broche 44 | PB2 — Port B bit 2 (output compare) |
| Broche 45 | PB1 — Port B bit 1 (output compare) |
| Broche 46 | PB0 — Port B bit 0 (output compare) |
| Broche 47 | EXTAL — External crystal / clock input |
| Broche 48 | XTAL — Crystal oscillator output |
| Broche 49 | VDD — Positive supply (5 V) |
| Broche 50 | E — E clock output (system clock) |
| Broche 51 | STRA/AS — Strobe A / address strobe |
| Broche 52 | STRB/R/W — Strobe B / read-write strobe |
Applications typiques
MC68711E20CFNE3 convient pour 6 applications: 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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
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.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MC68711E20CFNE3 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | 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) |
Principaux différenciateurs
- User-programmable OTP EPROM (vs MC68HC11E1CFNE3R)
- Standard 5 V industrial supply range (vs MC68HCP11E1CFNE3)
- Same-family migration path within the 52-PLCC footprint (vs MC68711E20CFNE2)
Notes de conception
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.
Informations de conformité
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).
