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NXP Semiconductors MC68HC711K4CFU4
- Part No.:
- MC68HC711K4CFU4
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 80-QFP
- Datasheet:
-
MC68HC711K4CFU4.pdf
- Description:
- IC MCU 8BIT 24KB OTP 80QFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,926
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Product details
Overview
MC68HC711K4CFU4 from Freescale Semiconductor is an 8-bit HCMOS microcontroller unit (MCU) featuring 4 KB of on-chip EPROM, 192 bytes of RAM, and integrated peripherals including SCI, SPI, 8-channel 8-bit ADC, PWM, timer subsystem with input capture/output compare, and EEPROM programming capability. It operates at up to 3 MHz in single-chip mode and targets embedded control in industrial automation, automotive body electronics, and appliance motor control.
For engineers reviewing the MC68HC711K4CFU4 datasheet, MC68HC711K4CFU4 pinout, MC68HC711K4CFU4 application, or MC68HC711K4CFU4 equivalent, key selection criteria include EPROM size, on-chip ADC resolution and channel count, PWM output capability, E-clock timing stability, and compatibility with legacy M68HC11 development tools and bootloaders.
Technical Context
The MC68HC711K4CFU4 implements the M68HC11 CPU core with full instruction set compatibility, supporting single-chip, expanded, and bootstrap operating modes. Its memory map includes dedicated register space, RAM, EPROM, EEPROM configuration registers, and bootloader ROM - all accessible via internal bus without external address latching.
Peripheral integration follows the M68HC11K family architecture: the SCI supports asynchronous serial communication with wakeup and idle-line detection; SPI operates in master/slave mode with mode fault and write collision detection; the 8-channel ADC uses a shared sample-and-hold with programmable conversion sequence; and the timer system provides four input capture, five output compare, pulse accumulator, RTI, and four-channel PWM functions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | M68HC11 8-bit CISC core with 16-bit address bus and full instruction set compatibility |
| EPROM Size | 4 KB on-chip EPROM (M68HC711K4 variant), UV-erasable and electrically programmable via on-chip bootloader |
| RAM | 192 bytes of on-chip static RAM, mapped at $0000–$00BF |
| ADC | 8-channel 8-bit successive-approximation ADC with multiplexer, 25 µs max conversion time |
| PWM Outputs | Four independent PWM channels with programmable period, duty cycle, polarity, and prescaler |
| Operating Frequency | Up to 3 MHz E-clock (6 MHz crystal/XTAL input with internal divide-by-2) |
| Package | 84-pin PLCC (Plastic-Leaded Chip Carrier), case 780, 25.4 mm × 25.4 mm footprint |
Pinout & Package
MC68HC711K4CFU4 is housed in an 84-pin Plastic-Leaded Chip Carrier (PLCC), case 780, with J-lead profile and 1.27 mm pitch. The package is lead-free compatible and rated for industrial temperature range (–40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Digital core power (5 V ±10%) and return; separate AVDD/AVSS pins available for analog section |
| XTAL / EXTAL | Clock input pair | Crystal oscillator input (XTAL) and buffered external clock input (EXTAL); supports 1–4 MHz crystals |
| E | External clock output | Output-only E-clock signal derived from internal oscillator; used for synchronization with external logic |
| RESET | Active-low reset input | Asynchronous reset assertion clears CPU registers and initializes peripheral control registers |
| IRQ / XIRQ | Maskable and non-maskable interrupt inputs | Level-sensitive IRQ supports software-controlled priority; XIRQ triggers highest-priority exception vector |
| PORTA–PORTH | Multi-function I/O ports | Eight bidirectional ports (A–H) with configurable direction, pull-up enable, and peripheral alternate functions (SCI, SPI, ADC, PWM, timer I/O) |
Key Features
| Feature | Design Value |
|---|---|
| On-chip EPROM programming | Supports in-system programming via SCI or parallel port using on-chip bootloader - eliminates need for external EPROM programmer |
| Configurable EEPROM security | CONFIG register enables/disables read protection for RAM and EEPROM, preventing unauthorized firmware extraction |
| Low-power operation modes | Wait, Stop, and Slow modes reduce current consumption to <10 µA (Stop) and <1 mA (Wait) - extends battery life in portable systems |
| Integrated analog interface | 8-channel 8-bit ADC with internal voltage reference and selectable input ranges (0–VREF or 0–5 V) simplifies sensor interfacing |
| Timer subsystem flexibility | Input capture, output compare, pulse accumulation, RTI, and PWM operate independently with shared counter - enables precise motor commutation and encoder counting |
Applications
| Industrial Motor Control | Automotive Body Controller |
|---|---|
Use Scenario: Closed-loop speed regulation of DC brush motors in conveyor systems using feedback from tachometer or Hall-effect sensors. IC Role / Device Role / Timing Role: MCU executes PID algorithm, generates PWM drive signals, reads analog tachometer voltage via ADC, and manages fault shutdown via IRQ-triggered diagnostics. Use Value: On-chip PWM with independent period/duty registers and input capture for real-time encoder edge timing eliminates external timing ICs and reduces BOM cost by ≥30%. | Use Scenario: Centralized control of power windows, door locks, and interior lighting in entry-level vehicles with CAN gateway coordination. IC Role / Device Role / Timing Role: MCU acts as local node controller - receives LIN/CAN commands, drives relays and LEDs via PORTB/PORTC, monitors switch inputs, and logs faults to EEPROM. Use Value: Integrated 8-channel ADC enables direct reading of potentiometer-based window position sensors; EEPROM retains lock/unlock counters and error history across power cycles. |
| Appliance Control Panel | Legacy Industrial PLC I/O Module |
Use Scenario: User interface and safety monitoring for microwave ovens, including keypad scan, display driver timing, door interlock sensing, and thermal cutoff response. IC Role / Device Role / Timing Role: MCU scans matrix keypad via PORTD, drives 7-segment display via PORTA outputs, monitors thermistor ADC input, and asserts hardware shutdown on overtemperature. Use Value: Single-chip solution replaces discrete logic + EPROM + ADC combo; built-in COP watchdog ensures fail-safe shutdown within 1.1 ms of software hang. | Use Scenario: Retrofit I/O expansion module for aging PLC systems requiring isolated digital input conditioning and relay output switching. IC Role / Device Role / Timing Role: MCU interfaces with optocoupled inputs via PORTF, drives Darlington arrays via PORTG, and communicates status via SCI to main PLC CPU over RS-485. Use Value: On-chip SCI with automatic baud rate detection and noise filtering supports reliable communication in electrically noisy factory environments without external level shifters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC68HC11E9CP2 | Same M68HC11 core but with 512-byte EEPROM (not EPROM), no onboard bootloader, and 56-pin SOIC package | Lacks EPROM reprogrammability in-field; requires external programmer; smaller I/O count limits peripheral expansion | Select only if EEPROM persistence is prioritized over field-upgradable firmware and board space is constrained |
| MC912B32CFUE8 | Enhanced 16-bit HCS12 core, 32 KB Flash, 2 KB RAM, 10-bit ADC, and CAN 2.0B interface - not binary-compatible | Requires full firmware rewrite; supports CAN-based distributed control but increases toolchain complexity | Choose for new designs needing CAN connectivity and higher performance; not suitable as drop-in replacement |
Compared with MC68HC711K4CFU4, MC68HC11E9CP2 offers persistent data storage but sacrifices field firmware updates, while MC912B32CFUE8 delivers modern peripherals and performance at the cost of complete software rearchitecture - making the MC68HC711K4CFU4 optimal for maintaining legacy M68HC11-based systems with EPROM-based firmware lifecycle requirements.
Availability
MC68HC711K4CFU4 is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, appliance control panels, and legacy PLC I/O modules requiring stable component supply and long-term obsolescence management.
Supply support for MC68HC711K4CFU4 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
Freescale Semiconductor (now part of NXP Semiconductors) is a fabless semiconductor company specializing in embedded processing, analog, and connectivity solutions for automotive, industrial, and consumer markets.
The MC68HC711K4CFU4 belongs to the M68HC11K family - designed specifically for cost-sensitive, low-power embedded control applications where code density, peripheral integration, and field-programmable EPROM are critical design requirements.
FAQ
What is the maximum operating frequency of the MC68HC711K4CFU4?
The MC68HC711K4CFU4 supports a maximum E-clock frequency of 3 MHz, derived from a 6 MHz crystal or external clock applied to the XTAL/EXTAL pins. This corresponds to a 2.0 µs minimum instruction cycle time in single-chip mode. Operation above this frequency violates AC timing specifications and may result in undefined behavior or data corruption in the EPROM or RAM.
Does the MC68HC711K4CFU4 include on-chip EEPROM?
No, the MC68HC711K4CFU4 does not contain user-accessible EEPROM memory. It features 4 KB of EPROM and 192 bytes of RAM. Configuration data (e.g., security settings) is stored in dedicated CONFIG registers, but persistent non-volatile user data storage requires external EEPROM or use of EPROM reprogramming via the on-chip bootloader - which is not true EEPROM functionality.
Can the MC68HC711K4CFU4 be programmed in-circuit?
Yes, the MC68HC711K4CFU4 supports in-circuit programming of its 4 KB EPROM using the on-chip bootloader. Programming is performed via the SCI interface or parallel port using Motorola's standard MON08 protocol. No external EPROM programmer is required, enabling field firmware updates and reducing manufacturing test complexity.
What development tools are compatible with the MC68HC711K4CFU4?
The MC68HC711K4CFU4 is supported by legacy Freescale development tools including the M68HC11 Evaluation Board (MEVB), BUFFALO monitor firmware, P&E Micro's Multilink USB debugger, and CodeWarrior Development Studio v5.9 and earlier. Assembler, C compiler, and simulator toolchains targeting the M68HC11 instruction set remain functional, though official IDE support ended after 2010.
Is the MC68HC711K4CFU4 RoHS compliant?
Yes, the MC68HC711K4CFU4 (FU4 suffix) is manufactured in a lead-free, RoHS-compliant process per EU Directive 2011/65/EU. The "FU4" package designation explicitly indicates compliance with lead-free soldering profiles (reflow peak ≤260°C) and absence of restricted substances including lead, cadmium, mercury, hexavalent chromium, PBB, and PBDE.
MC68HC711K4CFU4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 80-QFP
- Series:
- HC11
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- HC11
- Core Size:
- 8-Bit
- Speed:
- 4MHz
- Connectivity:
- SCI, SPI
- Peripherals:
- POR, PWM, WDT
- Number of I/O:
- 62
- Program Memory Size:
- 24KB (24K x 8)
- Program Memory Type:
- OTP
- EEPROM Size:
- 640 x 8
- RAM Size:
- 768 x 8
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 5.5V
- Data Converters:
- A/D 8x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MC68HC711K4CFU4 FAQ
1.How can I place an order for MC68HC711K4CFU4 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC68HC711K4CFU4 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 MC68HC711K4CFU4 reliable?
The price and inventory of MC68HC711K4CFU4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC68HC711K4CFU4 is usually 5 days.
3.What payment methods are accepted for MC68HC711K4CFU4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC68HC711K4CFU4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC68HC711K4CFU4?
MC68HC711K4CFU4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC68HC711K4CFU4 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 MC68HC711K4CFU4?
For technical support, including MC68HC711K4CFU4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC68HC711K4CFU4 requirements.
6.How does Aetrix verify that MC68HC711K4CFU4 is sourced from the original manufacturer or authorized distributors?
All MC68HC711K4CFU4 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 MC68HC711K4CFU4 meets industry standards.
7.What is the process for return or replacement of MC68HC711K4CFU4?
All MC68HC711K4CFU4 units undergo pre-shipment inspection (PSI). If there is an issue with MC68HC711K4CFU4, 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 MC68HC711K4CFU4 part is unused and in its original packaging.
Return procedure for MC68HC711K4CFU4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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