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NXP Semiconductors MC68L11K1FUE2
- Part No.:
- MC68L11K1FUE2
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 80-QFP
- Datasheet:
-
MC68L11K1FUE2.pdf
- Description:
- IC MCU 8BIT ROMLESS 80QFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,883
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Product details
Overview
MC68L11K1FUE2 from Freescale Semiconductor is an 8-bit HCMOS microcontroller unit (MCU) in the M68HC11K family, featuring 512 bytes of on-chip EEPROM, 256 bytes of RAM, and a 16-bit timer system with input capture, output compare, and pulse accumulation. It supports single-chip mode operation, includes a serial communications interface (SCI) and serial peripheral interface (SPI), and operates at up to 2 MHz bus frequency. It is used in industrial control modules requiring nonvolatile program storage and deterministic real-time I/O handling.
For engineers reviewing the MC68L11K1FUE2 datasheet, MC68L11K1FUE2 pinout, MC68L11K1FUE2 application, or MC68L11K1FUE2 equivalent, this page delivers verified technical context, package mapping, functional specifications, and validated alternative options for legacy embedded design continuity and component replacement planning.
Technical Context
The MC68L11K1FUE2 implements the M68HC11 CPU core with full instruction set compatibility, including indexed, extended, and relative addressing modes. It integrates a 12-channel 8-bit analog-to-digital converter with programmable conversion timing and external trigger support.
Its memory architecture includes mask-programmed ROM (for K4 variants) or factory-programmed OTPROM, plus user-programmable EEPROM for configuration and data logging. The device supports three operating modes - single-chip, expanded, and bootstrap - selected via MODA/LIR and MODB/VSTBY pins, enabling flexible system integration without external bus logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | M68HC11 8-bit CISC core with 16-bit address bus and 8-bit data bus; enables deterministic interrupt latency and direct memory-mapped peripheral access. |
| Max Bus Frequency | 2 MHz; defines maximum instruction execution rate and peripheral timing margins in single-chip mode. |
| On-Chip Memory | 512 bytes EEPROM (user-programmable, 10k write/erase cycles), 256 bytes RAM, and 24 KB ROM/OTPROM; supports self-reprogramming and secure bootloader execution. |
| ADC | 8-bit, 12-channel successive-approximation A/D converter with software- or timer-triggered conversion and 25 µs typical conversion time. |
| Timers | 16-bit timer with 4 input capture, 5 output compare channels, pulse accumulator, real-time interrupt, and PWM capability; supports motor control and encoder interfacing. |
| Serial Interfaces | One full-duplex SCI (asynchronous UART) and one synchronous SPI master/slave interface; enables sensor networking and flash programming via host MCU. |
| I/O Ports | Ports A–H with configurable direction, internal pull-ups on Port B, and dedicated timer/ADC/SCI/SPI signal multiplexing; simplifies PCB routing in space-constrained industrial nodes. |
Pinout & Package
MC68L11K1FUE2 is housed in an 80-pin Low-Profile Quad Flat Pack (LQFP), case number 917A, with 0.5 mm lead pitch and exposed thermal pad. This RoHS-compliant package supports surface-mount reflow assembly and provides mechanical stability for vibration-prone environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Core logic power (5 V ±10%) and reference return; decoupling required within 10 mm of pins for noise immunity. |
| XTAL / EXTAL | Crystal oscillator input/output | Supports 1–4 MHz crystal or external clock source; determines system clock frequency and timing accuracy for all peripherals. |
| RESET | Active-low reset input | Asynchronous hardware reset; initiates cold start sequence, clears registers, and forces entry into bootstrap or single-chip mode. |
| IRQ / XIRQ | Maskable and non-maskable interrupt inputs | Enable prioritized event handling: IRQ for peripheral interrupts (SCI, timer), XIRQ for critical fault recovery or debug entry. |
| MODA/LIR, MODB/VSTBY | Mode selection and standby control | Determine operating mode (single-chip/expanded/bootstrap) and enable low-power stop/wait modes; require external pull-up/down resistors. |
| PA0–PA7 | Port A bidirectional I/O | Shared with timer input capture and output compare signals; configured as general-purpose I/O or dedicated timer functions via control registers. |
| PC0–PC7 | Port C bidirectional I/O | Shared with ADC channel inputs (AD0–AD7); default analog input mode on power-up; digital I/O enabled after ADC disable. |
| SCI TXD / RXD | Serial transmit/receive data | Asynchronous full-duplex communication at baud rates up to 19.2 kbps; supports RS-232 level shifting via external transceiver. |
| SPI MOSI / MISO / SCK / SS | Serial peripheral interface signals | Enable synchronous communication with sensors, DACs, or external memory; SS active-low enables slave select with automatic deassertion on transfer completion. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip EEPROM | 512 bytes of electrically erasable, field-programmable nonvolatile memory for calibration data, configuration settings, and firmware updates without external programmer. |
| Integrated A/D Converter | 12-channel, 8-bit ADC with selectable sample-and-hold timing and software/start-of-conversion triggers - eliminates need for external ADC in sensor interface designs. |
| Timer System Flexibility | 16-bit timer with independent input capture, output compare, and pulse accumulation - supports encoder position tracking, PWM motor control, and frequency measurement in one peripheral. |
| Multiple Operating Modes | Single-chip, expanded, and bootstrap modes allow seamless transition from development (external memory) to production (self-contained) without PCB redesign. |
| Low-Power Capability | Stop and wait modes reduce current consumption to <10 µA and ~100 µA respectively - extends battery life in portable instrumentation and remote monitoring devices. |
Applications
| Industrial Motor Control | Automotive Body Controller |
|---|---|
Use Scenario: Closed-loop DC motor speed regulation using feedback from tachometer or hall-effect sensor. IC Role / Device Role / Timing Role: MCU executes PID algorithm, generates PWM output via OC channels, reads ADC for current/voltage sensing, and communicates status via SCI. Use Value: On-chip PWM and timer capture eliminate external PWM generator and counter ICs; EEPROM stores motor calibration constants across power cycles. |
Use Scenario: Centralized control of door locks, window lifts, and interior lighting in legacy automotive platforms. IC Role / Device Role / Timing Role: MCU monitors switch inputs via Port B, drives relays/LEDs via Port D, logs fault events to EEPROM, and communicates diagnostics over SCI. Use Value: Integrated I/O, EEPROM, and serial interface reduce BOM count and board area versus discrete logic + external memory solutions. |
| Smart Sensor Node | Legacy Industrial PLC I/O Module |
Use Scenario: Temperature/humidity sensor node with local data logging and RS-232 telemetry to host controller. IC Role / Device Role / Timing Role: MCU reads analog sensors via ADC, timestamps readings using RTI, stores data in EEPROM, and transmits via SCI with configurable baud rate. Use Value: Self-contained data acquisition avoids external timing ICs or FRAM; SCI supports standard PC-based configuration tools. |
Use Scenario: DIN-rail mounted digital I/O expansion module for retrofitting older PLC systems. IC Role / Device Role / Timing Role: MCU acts as intelligent interface between field I/O and backplane bus (e.g., Modbus RTU over RS-485 via SCI), managing isolation, debounce, and watchdog supervision. Use Value: Single-chip solution replaces multi-IC designs; EEPROM retains module address and 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 |
|---|---|---|---|
| MC68HC11E9CP | Same M68HC11 core but with 512 bytes RAM, no on-chip EEPROM, and 512 bytes EEPROM replaced by 512 bytes RAM; uses external EPROM for program storage. | Lacks integrated nonvolatile data storage; requires external EEPROM or battery-backed RAM for configuration retention. | Select when cost-sensitive designs can accommodate external memory and do not require field-updatable calibration data. |
| MC9RS08KA2CSC | RS08 core, 2 KB Flash, 128 bytes RAM, 10-bit ADC, no EEPROM; newer Freescale (NXP) 8-bit architecture with lower power and enhanced debug. | Not pin-compatible; lacks EEPROM and identical timer feature set; requires firmware porting and PCB layout change. | Choose for new designs where lifecycle assurance, lower active current (<1 mA), and modern toolchain support outweigh legacy compatibility needs. |
Compared with MC68L11K1FUE2, MC68HC11E9CP trades EEPROM for extra RAM and requires external program memory, while MC9RS08KA2CSC offers modern Flash-based architecture but mandates full hardware and software redesign - making MC68L11K1FUE2 irreplaceable for drop-in legacy maintenance without BOM or layout changes.
Availability
MC68L11K1FUE2 is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, and smart sensor node applications requiring stable component supply and long-term obsolescence mitigation.
Supply support for MC68L11K1FUE2 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, known for automotive, industrial, and networking solutions.
The MC68L11K1FUE2 belongs to the M68HC11K family - a line of cost-optimized, radiation-tolerant 8-bit MCUs targeting legacy industrial automation, automotive subsystems, and instrumentation where deterministic real-time response and EEPROM-based field configurability are essential.
FAQ
What is the maximum operating frequency of the MC68L11K1FUE2?
The MC68L11K1FUE2 operates with a maximum bus frequency of 2 MHz, derived from its internal clock divider and external crystal or oscillator input. This frequency governs instruction execution speed, timer resolution, and serial interface baud rates. Performance remains stable across the full industrial temperature range (–40°C to +85°C) when powered at 5 V ±10%.
Does the MC68L11K1FUE2 include on-chip EEPROM, and what is its endurance?
Yes, the MC68L11K1FUE2 integrates 512 bytes of on-chip EEPROM rated for a minimum of 10,000 write/erase cycles and data retention exceeding 10 years at +85°C. This EEPROM is accessible via dedicated control registers and supports byte-level writes and bulk erase - enabling reliable storage of calibration coefficients, device IDs, or operational logs without external memory.
Which package type is used for the MC68L11K1FUE2, and is it RoHS-compliant?
The MC68L11K1FUE2 is packaged in an 80-pin Low-Profile Quad Flat Pack (LQFP), case number 917A, with 0.5 mm lead pitch and exposed thermal pad. This package is RoHS-compliant and qualified for surface-mount reflow assembly per J-STD-020. Mechanical drawings and solder profile guidelines are documented in Section 13 of the official Freescale M68HC11K Family Technical Data manual.
Can the MC68L11K1FUE2 operate in low-power modes, and how is wake-up handled?
Yes, the MC68L11K1FUE2 supports Stop and Wait modes, reducing current draw to under 10 µA and ~100 µA respectively. Wake-up from Stop mode is triggered by RESET, IRQ, XIRQ, or RTI interrupt; from Wait mode, any enabled interrupt source or internal timer event can resume execution. Mode entry is controlled via the STOP and WAIT instructions executed in privileged mode.
Is the MC68L11K1FUE2 pin-compatible with other M68HC11K family members like the MC68HC11E9?
No, the MC68L11K1FUE2 is not pin-compatible with the MC68HC11E9 due to differences in pin assignment - particularly for memory control signals (e.g., R/W, E, AS) and peripheral multiplexing. While both belong to the M68HC11K family and share architectural similarities, the MC68L11K1FUE2's 80-pin LQFP footprint and signal mapping are specific to its K1 variant and differ from the 52-pin SDIP or 84-pin PLCC packages used by other family members.
MC68L11K1FUE2 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:
- 2MHz
- 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):
- 3V ~ 5.5V
- Data Converters:
- A/D 8x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MC68L11K1FUE2 FAQ
1.How can I place an order for MC68L11K1FUE2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC68L11K1FUE2 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 MC68L11K1FUE2 reliable?
The price and inventory of MC68L11K1FUE2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC68L11K1FUE2 is usually 5 days.
3.What payment methods are accepted for MC68L11K1FUE2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC68L11K1FUE2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC68L11K1FUE2?
MC68L11K1FUE2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC68L11K1FUE2 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 MC68L11K1FUE2?
For technical support, including MC68L11K1FUE2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC68L11K1FUE2 requirements.
6.How does Aetrix verify that MC68L11K1FUE2 is sourced from the original manufacturer or authorized distributors?
All MC68L11K1FUE2 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 MC68L11K1FUE2 meets industry standards.
7.What is the process for return or replacement of MC68L11K1FUE2?
All MC68L11K1FUE2 units undergo pre-shipment inspection (PSI). If there is an issue with MC68L11K1FUE2, 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 MC68L11K1FUE2 part is unused and in its original packaging.
Return procedure for MC68L11K1FUE2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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