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NXP Semiconductors MC68HC11K1CFN4
- Part No.:
- MC68HC11K1CFN4
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 84-LCC (J-Lead)
- Datasheet:
-
MC68HC11K1CFN4.pdf
- Description:
- IC MCU 8BIT ROMLESS 84PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,545
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Product details
Overview
MC68HC11K1CFN4 from Freescale Semiconductor is an 8-bit HCMOS microcontroller unit (MCU) featuring 512 bytes of on-chip EEPROM, 512 bytes of RAM, and 24 KB of ROM. It integrates a 16-bit timer system with input capture, output compare, pulse accumulator, and real-time interrupt functions, plus an 8-channel 8-bit analog-to-digital converter. It is used in embedded industrial control systems requiring deterministic timing and nonvolatile configuration storage.
For engineers reviewing the MC68HC11K1CFN4 datasheet, MC68HC11K1CFN4 pinout, MC68HC11K1CFN4 application, or MC68HC11K1CFN4 equivalent, key selection criteria include its 84-pin PLCC package, single-chip mode operation, COP watchdog, SCI/SPI serial interfaces, and EEPROM retention over 10 years at 25°C.
Technical Context
The MC68HC11K1CFN4 implements the M68HC11 CPU core with 64 KB address space, supporting single-chip, expanded, and bootstrap operating modes. Its memory map includes dedicated registers for EEPROM programming control, CONFIG register security, and system configuration options including COP timeout and clock monitor enable.
It features dual serial interfaces: full-duplex SCI with wakeup capability and master/slave SPI with mode fault detection. The 16-bit timer subsystem supports four input capture channels, five output compare channels, PWM generation, and pulse accumulation - all synchronized to the E-clock derived from internal oscillator or external crystal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | M68HC11 8-bit CISC architecture with 64 KB address space and 16-bit index registers |
| Memory | 24 KB ROM, 512 B RAM, 512 B EEPROM - enables firmware storage, runtime data, and field-updatable calibration parameters |
| ADC | 8-channel 8-bit successive-approximation A/D converter with software-selectable conversion time (8–16 µs) |
| Timer System | 16-bit timer with 4 input capture, 5 output compare, pulse accumulator, RTI, and 4-channel PWM |
| Serial Interfaces | SCI (asynchronous UART) and SPI (synchronous master/slave) - supports sensor interfacing and peripheral expansion |
| Operating Voltage | 5.0 V ±10% - compatible with standard TTL/CMOS logic and industrial power rails |
| Max Clock Frequency | 4 MHz E-clock (8 MHz crystal input with divide-by-2) - ensures deterministic real-time response in control loops |
Pinout & Package
MC68HC11K1CFN4 is housed in an 84-pin Plastic-Leaded Chip Carrier (PLCC), Case 780, with 0.050" lead pitch and JEDEC-standard footprint. Pinout conforms to M68HC11K family layout with dedicated VDD/VSS, AVDD/AVSS, XTAL/EXTAL, RESET, IRQ/XIRQ, E-clock output, and multi-function I/O ports (A–H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Digital power supply and ground | Primary 5 V supply domain for CPU and digital peripherals; decoupling required per Section 12.6 |
| AVDD, AVSS | Analog power supply and ground | Isolated 5 V analog domain for ADC reference and noise-sensitive circuitry |
| XTAL, EXTAL | Crystal oscillator input/output | Supports 1–8 MHz fundamental-mode crystals; internal oscillator enables self-contained clocking |
| E | System clock output | Provides buffered E-clock (½ oscillator frequency) for synchronous peripheral timing and external logic |
| RESET | Active-low reset input | Asynchronous reset assertion clears CPU registers and initializes memory map to single-chip mode |
| PORT A–H | Multi-function I/O ports | Configurable as general-purpose I/O, timer inputs/outputs, ADC channels, or serial interface signals |
Key Features
| Feature | Design Value |
|---|---|
| On-chip EEPROM | 512 bytes with 100,000 write/erase cycles and 10-year data retention - eliminates need for external nonvolatile memory |
| COP Watchdog | Configurable computer operating properly timer with independent clock source - prevents runaway code in safety-critical control |
| SCI Wakeup | Asynchronous SCI receiver detects start bit during stop mode - enables ultra-low-power remote wake-on-command |
| Hardware PWM | Four independent PWM channels with programmable period/duty cycle registers - supports motor speed and LED dimming control |
| Security Lock | CONFIG register protection via EEPROM write sequence - prevents unauthorized firmware readout or modification |
Applications
| Industrial Motor Control | Automotive Body Controller |
|---|---|
Use Scenario: Closed-loop DC motor speed regulation using tachometer feedback and H-bridge drive. IC Role / Device Role / Timing Role: MCU executing PID algorithm, generating PWM outputs, sampling ADC tach signal, and managing fault shutdown. Use Value: Integrated 4-channel PWM and 8-bit ADC eliminate external signal conditioning ICs; EEPROM stores motor calibration constants across power cycles. | Use Scenario: Centralized control of door locks, window lifts, and interior lighting in legacy vehicle platforms. IC Role / Device Role / Timing Role: Real-time I/O manager coordinating switch inputs, relay outputs, and LIN/SCI communication with body ECU. Use Value: Single-chip mode operation reduces BOM cost; COP watchdog ensures fail-safe lock actuation; 84-pin PLCC supports high I/O count in compact PCB layout. |
| Smart Sensor Node | Programmable Logic Controller (PLC) I/O Module |
Use Scenario: Field-deployable temperature/humidity sensor with local data logging and RS-232 telemetry. IC Role / Device Role / Timing Role: Data acquisition engine performing periodic ADC reads, timestamping via RTI, storing samples in EEPROM, and formatting SCI packets. Use Value: On-chip EEPROM enables autonomous logging without external memory; SCI wakeup allows battery-powered sleep between transmissions. | Use Scenario: DIN-rail mounted digital I/O expansion module with isolated inputs and relay outputs. IC Role / Device Role / Timing Role: Local intelligence handling debounce, edge detection, and scan-cycle timing for 16 discrete I/O points. Use Value: Multi-port parallel I/O (Ports A–H) provides 64 configurable pins; robust 5 V HCMOS I/O tolerates industrial noise; EEPROM retains configuration after power loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC68HC11E9CP2 | Same CPU core but 512 B RAM, 512 B EEPROM, 12 KB ROM; 80-pin QFP package | Lacks 4-channel PWM and has reduced timer channel count; no pulse accumulator | Select when lower pin count and reduced peripheral set suffice; verify compatibility with existing PCB layout |
| MC68HC11A8CP2 | 12 KB ROM, 512 B RAM, no on-chip EEPROM; requires external serial EEPROM for nonvolatile storage | Missing EEPROM limits field-upgrade capability; lacks COP watchdog and clock monitor | Choose only for cost-sensitive designs where external memory and simplified supervision are acceptable |
Compared with MC68HC11E9CP2 and MC68HC11A8CP2, the MC68HC11K1CFN4 delivers superior integration via on-chip EEPROM, full 4-channel PWM, and enhanced timer subsystem - reducing component count and improving reliability in closed-loop control applications.
Availability
MC68HC11K1CFN4 is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, smart sensor nodes, and PLC I/O modules requiring stable component supply and long-term lifecycle support.
Supply support for MC68HC11K1CFN4 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) was a leading designer of embedded processors and analog/mixed-signal ICs, founded in 2004 as a spin-off from Motorola's semiconductor division.
The MC68HC11K1CFN4 belongs to the M68HC11K family - engineered for cost-sensitive, real-time industrial and automotive control applications where deterministic timing, EEPROM-based configuration, and robust I/O are essential.
FAQ
What is the maximum operating frequency of the MC68HC11K1CFN4?
The MC68HC11K1CFN4 operates with a maximum E-clock frequency of 4 MHz, derived from an 8 MHz crystal input divided by two internally. This frequency defines the timing base for all CPU instructions, timer operations, and serial interface baud rates. The device meets this specification across its full functional operating range of –40°C to +85°C and 4.5 V to 5.5 V supply voltage.
Does the MC68HC11K1CFN4 include a hardware watchdog timer?
Yes, the MC68HC11K1CFN4 includes a Computer Operating Properly (COP) watchdog timer with independently clocked timeout circuitry. The COP must be periodically cleared by software; failure to do so triggers a hardware reset. Its timeout interval is configurable via the System Configuration Register and is active in all operating modes except stop mode.
Can the MC68HC11K1CFN4 execute code directly from its on-chip EEPROM?
No, the MC68HC11K1CFN4 cannot execute code from EEPROM. Its 512-byte EEPROM is intended for nonvolatile data storage only - such as calibration values, configuration parameters, or event logs. Program execution occurs from the 24 KB ROM or external memory in expanded mode. EEPROM access is performed via dedicated control registers and requires specific write/erase sequences.
What packaging options are available for the MC68HC11K1CFN4?
MC68HC11K1CFN4 is specifically offered in the 84-pin Plastic-Leaded Chip Carrier (PLCC) package, designated Case 780. This surface-mount package features a square body with J-leads and is compatible with standard PLCC sockets and reflow soldering processes. Other M68HC11K variants use different packages (e.g., QFP or J-Cerquad), but the FN4 suffix confirms the 84-pin PLCC variant.
How does the MC68HC11K1CFN4 handle analog input references for its ADC?
The MC68HC11K1CFN4 uses separate analog power supplies (AVDD and AVSS) to isolate the ADC's reference domain from digital noise. Its 8-bit successive-approximation ADC accepts inputs referenced to AVDD (typically 5 V), with conversion resolution dependent on the stability and cleanliness of the AVDD rail. External decoupling capacitors on AVDD/AVSS are mandatory per Section 12.6 of the datasheet to ensure specified 8-bit linearity and accuracy.
MC68HC11K1CFN4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 84-LCC (J-Lead)
- Series:
- HC11
- Packaging:
- Tube
- 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:
- 37
- Program Memory Size:
- -
- Program Memory Type:
- ROMless
- 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:
MC68HC11K1CFN4 FAQ
1.How can I place an order for MC68HC11K1CFN4 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC68HC11K1CFN4 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 MC68HC11K1CFN4 reliable?
The price and inventory of MC68HC11K1CFN4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC68HC11K1CFN4 is usually 5 days.
3.What payment methods are accepted for MC68HC11K1CFN4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC68HC11K1CFN4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC68HC11K1CFN4?
MC68HC11K1CFN4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC68HC11K1CFN4 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 MC68HC11K1CFN4?
For technical support, including MC68HC11K1CFN4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC68HC11K1CFN4 requirements.
6.How does Aetrix verify that MC68HC11K1CFN4 is sourced from the original manufacturer or authorized distributors?
All MC68HC11K1CFN4 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 MC68HC11K1CFN4 meets industry standards.
7.What is the process for return or replacement of MC68HC11K1CFN4?
All MC68HC11K1CFN4 units undergo pre-shipment inspection (PSI). If there is an issue with MC68HC11K1CFN4, 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 MC68HC11K1CFN4 part is unused and in its original packaging.
Return procedure for MC68HC11K1CFN4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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