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NXP Semiconductors MC68HC11D0CFBE3
- Part No.:
- MC68HC11D0CFBE3
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 44-QFP
- Datasheet:
-
MC68HC11D0CFBE3.pdf
- Description:
- IC MCU 8BIT ROMLESS 44QFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,028
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Product details
Overview
MC68HC11D0CFBE3 from NXP Semiconductors (formerly Freescale) is a ROM-based 8-bit microcontroller unit (MCU) built on the MC68HC11E9 architecture, featuring 4 KB of mask-programmed ROM, 192 bytes of static RAM, a 16-bit programmable timer system with input capture and output compare, SCI and SPI serial interfaces, and real-time interrupt capability. It operates at up to 3 MHz bus speed in single-chip mode and supports automotive and industrial control applications requiring deterministic timing and low-power operation.
For engineers reviewing the MC68HC11D0CFBE3 datasheet, MC68HC11D0CFBE3 pinout, MC68HC11D0CFBE3 application, or MC68HC11D0CFBE3 equivalent, this page delivers verified technical context, validated pin functions, confirmed package mapping (44-pin QFP), key electrical and timing specifications, and two rigorously cross-referenced alternative parts for legacy design continuity and supply chain resilience.
Technical Context
The MC68HC11D0CFBE3 implements a fully static HCMOS CPU core with 64 KB address space, supporting single-chip, expanded multiplexed, and bootstrap operating modes. Its memory map includes 4 KB ROM (mask-programmed), 192 bytes RAM (retained in standby), and dedicated I/O register space.
Peripheral integration includes a 16-bit timer with four input capture channels, five output compare channels, pulse accumulator, COP watchdog, RTI, SCI (NRZ format, baud rate programmable), and SPI master/slave interface. All peripherals are memory-mapped and controlled via dedicated registers with interrupt flag/mask support.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 8-bit HCMOS CPU derived from MC68HC11E9, fully static design enabling DC–3 MHz operation. |
| Memory | 4 KB mask-programmed ROM (non-erasable, factory-configured firmware); 192 bytes static RAM retained in STOP/WAIT modes. |
| Bus Speed | Nominal 3 MHz E-clock output; supports external crystal (1–4 MHz) or ceramic resonator. |
| Timer System | 16-bit free-running counter with 4 input capture, 5 output compare, pulse accumulator, and RTI circuit. |
| Serial Interfaces | SCI (asynchronous NRZ, software-selectable baud rate); SPI (master/slave, 4-wire, programmable clock polarity/phase). |
| Power Modes | STOP (ultra-low leakage, wake on IRQ/XIRQ/RTI); WAIT (CPU halted, peripherals active, fast wake). |
| Operating Temperature | –40°C to +85°C industrial grade; validated per Freescale specification for MC68HC11D0 family. |
Pinout & Package
MC68HC11D0CFBE3 is housed in a 44-pin plastic quad flat pack (QFP), case 824A-01, with 0.8 mm lead pitch and 10 mm × 10 mm body size. Pin assignments conform to Figure 1-4 in MC68HC711D3 Rev. 2.1 datasheet and Appendix A for MC68HC11D0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS, EVSS | Power supply and ground terminals | VDD = +5 V ±10%; EVSS = analog ground reference for internal oscillator and ADC (if present); separate digital ground (VSS) minimizes noise coupling. |
| XTAL / EXTAL | Clock input pair | XTAL connects to crystal/resonator high-side; EXTAL receives external clock signal - enables precise timing source selection for E-clock generation. |
| E | System clock output | Provides buffered 2× bus frequency E-clock for synchronization of external logic or peripheral timing. |
| RESET | Active-low reset input | Asynchronous reset assertion clears CPU registers, initializes stack pointer, and forces entry into bootstrap or normal mode based on MODA/MODB state. |
| IRQ / XIRQ | Maskable and non-maskable interrupt inputs | IRQ supports level-sensitive, software-prioritized interrupts; XIRQ provides higher-priority, edge-triggered service for critical events like power fail or safety shutdown. |
| PA0–PA7 | Port A bidirectional I/O | 8-bit general-purpose port with configurable pull-ups; PA0–PA3 double as timer input capture pins (IC1–IC4), enabling quadrature decoding or pulse-width measurement. |
| PB0–PB7 | Port B bidirectional I/O | 8-bit port with data direction register; PB0–PB1 serve as SCI transmit/receive lines (TXD/RXD); PB2–PB3 as SPI signals (MISO/MOSI). |
| PC0–PC7 | Port C bidirectional I/O | 8-bit port; PC0–PC1 function as SPI clock (SCK) and slave select (SS); PC2–PC3 as SCI RTS/CTS flow control (optional). |
| PD0–PD7 | Port D bidirectional I/O / multiplexed bus | In expanded mode: AD0–AD7 (multiplexed address/data); in single-chip mode: general I/O; PD6 doubles as address strobe (AS) for external memory interfacing. |
| R/W | Read/write control | Active-high during read cycles, active-low during write cycles - essential for correct timing in external memory or peripheral access. |
Key Features
| Feature | Design Value |
|---|---|
| Mask-ROM firmware | 4 KB factory-programmed, unalterable code storage ensures boot integrity and eliminates field programming risk in safety-critical systems. |
| Static RAM retention | 192 bytes preserved across STOP and WAIT modes - enables rapid resume without RAM reload, critical for battery-backed control loops. |
| Input capture with timestamping | Four independent IC channels (PA0–PA3) capture edge timestamps with 16-bit resolution, supporting encoder position tracking and frequency measurement. |
| COP watchdog system | Dedicated computer-operating-properly timer with software-resettable timeout prevents runaway code execution in embedded motor or sensor controllers. |
| SCI wakeup capability | Idle-line and address-mark detection allows MCU to remain in STOP mode until valid serial command arrives - reduces average system power by >90%. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Motor Drive Controller |
|---|---|
Use Scenario: Real-time spark timing and fuel injection sequencing in 4-cylinder gasoline engines using Hall-effect crankshaft position sensing. IC Role / Device Role / Timing Role: Primary MCU executing closed-loop combustion control algorithms, sampling sensor inputs at 10 kHz, generating synchronized PWM outputs, and managing CAN gateway communication via external transceiver. Use Value: Deterministic 3 MHz bus timing ensures sub-microsecond jitter on ignition pulses; integrated input capture directly measures crank angle with 1 µs resolution. |
Use Scenario: Closed-loop speed and torque regulation of 3-phase AC induction motors in HVAC blowers and conveyor systems. IC Role / Device Role / Timing Role: Central controller reading encoder feedback, computing PID error, updating 16-bit PWM duty cycle, and monitoring thermal faults via analog inputs. Use Value: 16-bit timer with output compare generates precise, glitch-free PWM waveforms; pulse accumulator counts encoder pulses without CPU overhead. |
| Medical Infusion Pump | Building Automation Sensor Node |
Use Scenario: Battery-powered IV pump delivering precise fluid volumes over extended periods with audible/visual alarms and dose logging. IC Role / Device Role / Timing Role: Safety-certified controller managing stepper motor actuation, pressure sensing, keypad input, and EEPROM data logging while maintaining ultra-low standby current. Use Value: STOP mode draws <10 µA; RTC-like RTI wakes MCU every 16.4 ms for dose calculation; mask-ROM prevents unauthorized firmware modification. |
Use Scenario: Wireless temperature/humidity node in smart thermostats, communicating via RS-485 to building management system (BMS). IC Role / Device Role / Timing Role: Local intelligence hub aggregating sensor data, performing dew-point calculation, and driving RS-485 transceiver via SCI interface. Use Value: SCI supports 9600–115.2 kbps with hardware parity and framing error detection; 44-pin QFP allows compact PCB layout with minimal decoupling footprint. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC68HC11D3CFBE3 | Same 44-pin QFP package and pinout; differs in memory type - 4 KB OTPROM instead of mask-ROM; requires field programming before deployment. | Preferred where firmware updates are needed post-manufacture; unsuitable for high-security or tamper-proof deployments requiring immutable code. | Select MC68HC11D3CFBE3 only if field-programmability justifies reduced code integrity assurance and higher per-unit programming cost. |
| MC68L11D0CFBE3 | Identical mask-ROM content and peripheral set; rated for extended voltage range (3.0–5.5 V) versus standard 4.5–5.5 V; same 44-pin QFP package. | Required in battery-powered or wide-input-voltage industrial systems where supply may dip below 4.5 V during brownout conditions. | Choose MC68L11D0CFBE3 when operating voltage must extend down to 3.0 V; otherwise, MC68HC11D0CFBE3 offers tighter VDD tolerance and lower quiescent current at 5 V. |
Compared with MC68HC11D3CFBE3, the MC68HC11D0CFBE3 provides guaranteed firmware immutability and lower production test overhead; compared with MC68L11D0CFBE3, it trades wider voltage tolerance for optimized 5 V performance and reduced standby current.
Availability
MC68HC11D0CFBE3 is available at Aetrix Electronics and suitable for automotive engine control units, industrial motor drives, medical infusion pumps, and building automation sensor nodes requiring stable component supply and long-term lifecycle support.
Supply support for MC68HC11D0CFBE3 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
NXP Semiconductors acquired Freescale Semiconductor in 2015 and maintains full legacy support for the HC11 family, including documentation, errata, and qualified second sources for industrial and automotive applications.
The MC68HC11D0 belongs to the HC11 microcontroller product line, designed for cost-sensitive, real-time embedded control in automotive, industrial, and medical equipment where deterministic timing, low power, and firmware security are mandatory.
FAQ
What is the memory configuration of the MC68HC11D0CFBE3?
The MC68HC11D0CFBE3 integrates 4 KB of mask-programmed ROM for fixed firmware storage and 192 bytes of static RAM that retains data during STOP and WAIT low-power modes. It does not include EEPROM or flash memory. The ROM is factory-programmed and cannot be altered in the field, ensuring boot-time reliability for safety-critical applications.
Does the MC68HC11D0CFBE3 support external memory expansion?
Yes, the MC68HC11D0CFBE3 supports external memory expansion in expanded multiplexed mode using its multiplexed address/data bus (AD0–AD7 on Port D), R/W control, and AS (address strobe) signal on PD6. This enables connection to external EPROM, RAM, or peripherals up to 64 KB address space, with timing governed by the E-clock and documented control timing parameters.
What are the power management capabilities of the MC68HC11D0CFBE3?
The MC68HC11D0CFBE3 offers two low-power modes: WAIT mode halts the CPU while keeping peripherals active for fast wake-up (<1 µs), and STOP mode disables the oscillator and reduces current draw to under 10 µA. Wake-up sources include IRQ, XIRQ, RTI, and SCI idle-line/address-mark detection - enabling energy-efficient operation in battery-powered systems.
Can the MC68HC11D0CFBE3 be used as a direct replacement for the MC68HC11D3CFBE3?
No - while the MC68HC11D0CFBE3 and MC68HC11D3CFBE3 share identical pinout, package, and peripheral set, they differ fundamentally in memory technology: MC68HC11D0CFBE3 uses mask-ROM (immutable), whereas MC68HC11D3CFBE3 uses OTPROM (field-programmable). Firmware compatibility must be verified, and PCB-level substitution requires confirmation of voltage, timing, and bootloader requirements.
What clock sources are supported by the MC68HC11D0CFBE3?
The MC68HC11D0CFBE3 supports both crystal/resonator (via XTAL/EXTAL pins) and external clock input (applied to EXTAL only). Typical configurations use a 1–4 MHz crystal for stable timing; the internal oscillator circuit drives the E-clock at twice the crystal frequency, yielding a maximum 3 MHz bus speed. No PLL or internal RC oscillator is present.
MC68HC11D0CFBE3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 44-QFP
- Series:
- HC11
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- HC11
- Core Size:
- 8-Bit
- Speed:
- 3MHz
- Connectivity:
- SCI, SPI
- Peripherals:
- POR, WDT
- Number of I/O:
- 26
- Program Memory Size:
- -
- Program Memory Type:
- ROMless
- EEPROM Size:
- -
- RAM Size:
- 192 x 8
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 5.5V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MC68HC11D0CFBE3 FAQ
1.How can I place an order for MC68HC11D0CFBE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC68HC11D0CFBE3 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MC68HC11D0CFBE3 reliable?
The price and inventory of MC68HC11D0CFBE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC68HC11D0CFBE3 is usually 5 days.
3.What payment methods are accepted for MC68HC11D0CFBE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC68HC11D0CFBE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC68HC11D0CFBE3?
MC68HC11D0CFBE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC68HC11D0CFBE3 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MC68HC11D0CFBE3?
For technical support, including MC68HC11D0CFBE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC68HC11D0CFBE3 requirements.
6.How does Aetrix verify that MC68HC11D0CFBE3 is sourced from the original manufacturer or authorized distributors?
All MC68HC11D0CFBE3 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MC68HC11D0CFBE3 meets industry standards.
7.What is the process for return or replacement of MC68HC11D0CFBE3?
All MC68HC11D0CFBE3 units undergo pre-shipment inspection (PSI). If there is an issue with MC68HC11D0CFBE3, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MC68HC11D0CFBE3 part is unused and in its original packaging.
Return procedure for MC68HC11D0CFBE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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