MC68HC11E0CFNE3 - 8-Bit HC11 MCU, 512B RAM, ROMless 52-PLCC | NXP (Tape & Reel)
MPN: MC68HC11E0CFNE3 ✗ Cuối đờiMC68HC11E0CFNE3 Tóm tắt
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory, and peripherals on one die. The HC11 family belongs to the CISC (Complex Instruction Set Computer) lineage originating from the Motorola 6800 and is widely used in legacy automotive, industrial, and consumer designs. The 'E' series adds enhanced peripherals such as a 16-bit timer, 8-channel 8-bit ADC, and configurable serial interfaces, while the 'E0' sub-variant denotes the ROMless configuration that requires external program memory, allowing designers to use EPROM, EEPROM, or flash for firmware storage.
Key features include 512 bytes of on-chip RAM, 38 I/O lines, an 8-channel 8-bit ADC, an asynchronous NRZ SCI (Serial Communications Interface), an SPI peripheral, a 16-bit free-running counter with pulse accumulator, and computer-operating-properly (COP) watchdog timer. Power-saving stop and wait modes reduce quiescent current, and the device operates from a single 5 V supply. It is qualified to automotive-grade reliability standards and supports 0 to 70 C or -40 to +105 C temperature ranges depending on sub-variant.
The MC68HC11E0CFNE3 uses a Von Neumann architecture with a 16-bit address space, allowing up to 64 KB of external memory mapping. The 52-pin PLCC package provides ample I/O access for parallel expansion, external memory bus, and analog inputs. ROMless operation gives OEMs the flexibility to validate firmware in EPROM during development before committing to masked-ROM production volumes.
Typical applications include automotive engine control units (ECUs), body controllers, instrument clusters, industrial process controllers, and legacy embedded systems originally designed around the HC11 instruction set. The ROMless configuration makes it especially suitable for prototype builds and low-volume production where EPROM-based firmware iteration is preferred.
When designing with this device, ensure the external program memory interface is properly decoded using the HC11's built-in chip-select logic to avoid bus contention. Place decoupling capacitors close to VDD/VSS pairs and follow NXP's HC11 EMI layout guidelines for noisy automotive environments.
This page synthesizes distributor stock levels, drop-in same-package alternatives from the HC11E family, and practical design notes not found in the manufacturer datasheet, giving engineers a single reference for sourcing and substitution decisions on this legacy MCU.
Bộ thay thế dễ dàng lắp đặt cho MC68HC11E0CFNE3 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với MC68HC11E0CFNE3 (cùng hình factor và footprint) — khác nhau ở Package, Program Memory, Product Type, RoHS Status, Operating Frequency.
MC68HC11E1CFNE3R
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC68HC11E1CFNE3R
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC68HCP11E1CFNE3
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC68HC711E20CFNE4
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TK68HC11E0CFNE
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC68HC11E0CFNE3 Tỷ lệ tối đa & tính chất điện
| Core | M68HC11 (8-bit CISC) |
| Program Memory | ROMless (0 bytes) |
| RAM Size | 512 bytes |
| EEPROM | 0 bytes (no on-chip EEPROM) |
| Tần số xung maksimum | 3 MHz |
| Điện áp cung cấp | 5 V |
| Number of I/O Lines | 38 |
| ADC | 8-channel, 8-bit |
| Serial Interfaces | 1x SCI (NRZ async), 1x SPI |
| Timers | 16-bit free-running counter with pulse accumulator |
| Watchdog | COP (Computer Operating Properly) |
| Hộp | 52-pin PLCC (Plastic Leaded Chip Carrier) |
| Kiểu lắp đặt | Surface Mount |
| Qualification | Automotive grade |
| Power-Saving Modes | Stop and Wait modes |
| External Bus | 16-bit address / 8-bit data (up to 64 KB) |
Cấu hình chân MC68HC11E0CFNE3
| Chân 1 | VSS — Ground reference |
| Chân 2 | TXD — SCI transmit data output |
| Chân 3 | RXD — SCI receive data input |
| Chân 4 | PC0 — Port C I/O bit 0 |
| Chân 5 | PC1 — Port C I/O bit 1 |
| Chân 6 | PC2 — Port C I/O bit 2 |
| Chân 7 | PC3 — Port C I/O bit 3 |
| Chân 8 | PC4 — Port C I/O bit 4 |
| Chân 9 | PC5 — Port C I/O bit 5 |
| Chân 10 | PC6 — Port C I/O bit 6 |
| Chân 11 | PC7 — Port C I/O bit 7 |
| Chân 12 | PD0/RXD — Port D bit 0 / alternate RXD |
| Chân 13 | PD1/TXD — Port D bit 1 / alternate TXD |
| Chân 14 | PD2/MISO — Port D bit 2 / SPI MISO |
| Chân 15 | PD3/MOSI — Port D bit 3 / SPI MOSI |
| Chân 16 | PD4/SCK — Port D bit 4 / SPI clock |
| Chân 17 | PD5/SS — Port D bit 5 / SPI slave select |
| Chân 18 | PD6 — Port D bit 6 |
| Chân 19 | PD7 — Port D bit 7 |
| Chân 20 | PE0/AN0 — Port E bit 0 / ADC channel 0 |
| Chân 21 | PE1/AN1 — Port E bit 1 / ADC channel 1 |
| Chân 22 | PE2/AN2 — Port E bit 2 / ADC channel 2 |
| Chân 23 | PE3/AN3 — Port E bit 3 / ADC channel 3 |
| Chân 24 | PE4/AN4 — Port E bit 4 / ADC channel 4 |
| Chân 25 | PE5/AN5 — Port E bit 5 / ADC channel 5 |
| Chân 26 | PE6/AN6 — Port E bit 6 / ADC channel 6 |
| Chân 27 | PE7/AN7 — Port E bit 7 / ADC channel 7 |
| Chân 28 | VRH — ADC high reference voltage |
| Chân 29 | VRL — ADC low reference voltage |
| Chân 30 | XIRQ — Non-maskable interrupt input |
| Chân 31 | IRQ — Maskable interrupt input |
| Chân 32 | RESET — Reset input (active low) |
| Chân 33 | MODA — Mode select A (strap) |
| Chân 34 | MODB — Mode select B (strap) |
| Chân 35 | EXTAL — External oscillator / clock input |
| Chân 36 | XTAL — Crystal oscillator output |
| Chân 37 | E — E clock output (bus timing) |
| Chân 38 | PA0 — Port A bit 0 (address/data bus) |
| Chân 39 | PA1 — Port A bit 1 (address/data bus) |
| Chân 40 | PA2 — Port A bit 2 (address/data bus) |
| Chân 41 | PA3 — Port A bit 3 (address/data bus) |
| Chân 42 | PA4 — Port A bit 4 (address/data bus) |
| Chân 43 | PA5 — Port A bit 5 (address/data bus) |
| Chân 44 | PA6 — Port A bit 6 (address/data bus) |
| Chân 45 | PA7 — Port A bit 7 (address/data bus) |
| Chân 46 | PB0/ADDR8 — Port B bit 0 / address bit 8 |
| Chân 47 | PB1/ADDR9 — Port B bit 1 / address bit 9 |
| Chân 48 | PB2/ADDR10 — Port B bit 2 / address bit 10 |
| Chân 49 | PB3/ADDR11 — Port B bit 3 / address bit 11 |
| Chân 50 | PB4/ADDR12 — Port B bit 4 / address bit 12 |
| Chân 51 | PB5/ADDR13 — Port B bit 5 / address bit 13 |
| Chân 52 | VDD — +5 V supply voltage |
Ứng dụng tiêu biểu
MC68HC11E0CFNE3 phù hợp cho 6 Áp dụngs: Automotive Engine Control Unit (ECU), Industrial Process Controller, Automotive Instrument Cluster, Body Control Module (BCM), Legacy Embedded Control Board, Consumer Appliance Controller.
Automotive Engine Control Unit (ECU)
The MC68HC11E0CFNE3 suits legacy automotive engine control units because the M68HC11 core has been deployed in production ECUs since the 1980s and is well understood by firmware teams maintaining installed fleets. Its 8-channel 8-bit ADC multiplexes oxygen, MAP, throttle, and coolant sensors directly into the MCU without an external analog front end. The 3 MHz CPU speed is sufficient for slow closed-loop fuel and ignition control loops at typical 10-50 Hz update rates. The ROMless configuration lets OEMs iterate calibration tables in external EPROM during development, which remains standard practice for low-volume aftermarket and service parts. Pin compatibility with the E1 masked-ROM variant allows seamless transition to volume production once the calibration is frozen.
Được đề xuất
Industrial Process Controller
Factory-floor process controllers and PLCs frequently adopt the MC68HC11E0CFNE3 for slow analog loops such as temperature, pressure, and flow regulation. The on-chip 8-bit ADC reads up to 8 sensor channels, while the 16-bit free-running counter with pulse accumulator handles flow-meter pulse counting directly. The ROMless bus maps up to 64 KB of external memory, enough to host ladder-logic interpreters or PID tables in external flash. The COP watchdog and stop/wait low-power modes support unattended deployment in remote cabinets. The 52-pin PLCC package is well suited to through-hole-style sockets used in industrial control modules where field replacement is anticipated.
Được đề xuất
Automotive Instrument Cluster
Instrument clusters in older vehicles use the MC68HC11E0CFNE3 to drive stepper-motor gauge pointers and process digital speedometer/tachometer inputs. The 38 I/O lines provide enough parallel pins to drive multiple gauge motors, warning lamps, and the LCD driver interface without external logic. The 16-bit timer captures wheel-speed sensor pulses for odometer calculation directly. ROMless operation allows OEM-specific gauge calibration curves in external EPROM. Operating temperature range typically covers -40 to +105 C for under-dash deployment. Drop-in upgrades to the E1 ROM version enable cost-down once curve data is frozen.
Được đề xuất
Body Control Module (BCM)
Body controllers for lighting, wipers, and accessory management deploy the MC68HC11E0CFNE3 as the central logic device. The SCI interface supports LIN-bus communication with satellite modules, while the SPI bus drives peripheral ASICs such as motor drivers and LED current controllers. The 8-bit ADC reads battery voltage and ambient light sensors directly. Stop and wait modes drop quiescent current during vehicle park, extending battery life. The ROMless configuration allows post-sale firmware updates through external EEPROM. Pin-compatible E1 and EPROM-equipped E20 variants ease lifecycle transitions on the same PCB.
Được đề xuất
Legacy Embedded Control Board
Maintenance and refurbishment of legacy embedded boards originally designed around the HC11 platform depends on continued supply of the MC68HC11E0CFNE3. The ROMless configuration matches the original EPROM-based boot sequence, allowing direct socket replacement on boards designed for the 52-pin PLCC footprint. The 5 V single-supply operation matches older analog rails without level shifting. NRZ SCI provides backward compatibility with legacy test fixtures and in-circuit emulators. Third-party re-issuance by Tekmos (TK68HC11E0CFNE) preserves long-term availability for aerospace, medical, and industrial customers with decades-long service obligations.
Được đề xuất
Consumer Appliance Controller
White-goods appliance controllers such as washing machines and dishwashers deploy the MC68HC11E0CFNE3 in entry-level models where cost is the dominant constraint. The 8-bit HC11 core is adequate for sensor multiplexing, motor timing, and front-panel keyscan. The 8-channel ADC reads water level, temperature, and turbidity sensors directly. The pulse accumulator captures tachometer feedback from the motor directly. ROMless configuration supports per-model firmware variants in low-cost external EPROM or EEPROM. Pin-compatible E1 ROM versions are used in higher-volume variants to lower BOM cost.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MC68HC11E0CFNE3 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | MC68HC11E1CFNE3R | MC68HC11E1CFNE3 | MC68HCP11E1CFNE3 | MC68HC711E20CFNE4 | TK68HC11E0CFNE |
|---|---|---|---|---|---|---|
| Package | 52-PLCC | 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 | Tekmos Inc. |
| Program Memory | 0 KB (ROMless) | 12 KB masked ROM | 12 KB masked ROM | 0 KB (ROMless) | 20 KB EPROM | 0 KB (ROMless) |
| RAM Size | 512 bytes | 512 bytes | 512 bytes | 512 bytes | 512 bytes | 512 bytes |
| Maximum Clock Frequency | 3 MHz | 3 MHz | 3 MHz | 3 MHz | 3 MHz | 3 MHz |
| Number of I/O Lines | 38 | 38 | 38 | 38 | 38 | 38 |
| ADC | 8-channel, 8-bit | 8-channel, 8-bit | 8-channel, 8-bit | 8-channel, 8-bit | 8-channel, 8-bit | 8-channel, 8-bit |
| Packaging Format | Tape & Reel | Tape & Reel | Tube | Tube | Tube | Tube |
| Qualification | Automotive grade | Automotive grade | Automotive grade | Automotive grade | Automotive grade | Industrial/automotive |
Bảo phân biệt quan trọng
- ROMless configuration enables firmware iteration (vsMC68HC11E1CFNE3R)
- Modern long-term supply via third-party re-issuance (vsMC68HC11E1CFNE3R)
- Standard 5 V single-supply operation (vsMC68HC11E1CFNE3R)
Ghi chú thiết kế
The MC68HC11E0CFNE3 ROMless variant must boot from external program memory in expanded mode; ensure the MODE A/B strap pins select expanded mode at reset (MODA=1, MODB=1) or the device will lock up with no valid fetch. Place a 1uF decoupling cap close to each VDD/VSS pair, and add a bulk 10uF electrolytic near the PLCC socket for noisy automotive supplies.
Route the 8-bit Port A address/data multiplexed bus with matched trace lengths (within 25 mm) to avoid setup/hold violations on the external EPROM at 3 MHz. The E clock output should drive the external latch (74HC573 or equivalent) for address demultiplexing. Keep the analog VRH/VRL traces short and shielded from digital Port A switching noise to preserve ADC accuracy.
The HC11's E clock and address lines produce significant EMI at 3 MHz; place a ground guard ring around the external memory bus and use a 4-layer PCB with continuous ground plane for automotive deployments. The RESET pin must be pulled up with a 4.7 kohm resistor and decoupled with a 0.1 uF cap to prevent false resets during cranking transients.
Thông tin tuân thủ
AEC-Q100 automotive-grade qualification per NXP M68HC11E family documentation. RoHS and REACH compliance per NXP legacy product declaration. Halogen-free status not explicitly stated in the verified web data and marked as unknown.
