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HomeProductsIntegrated Circuits (ICs)Embedded - MicrocontrollersMC908LK24CPBE
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MC908LK24CPBE - NXP USA Inc.

Manufacturer Part Number
MC908LK24CPBE
Manufacturer
NXP Semiconductors
Allelco Part Number
32D-MC908LK24CPBE
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
17,910 pcs available, New & Original
Parts Description
IC MCU 8BIT 24KB FLASH 64LQFP
Package
64-LQFP (10x10)
Data sheet
MC908LK24CPBE.pdf

PCN Obsolescence/ EOL

Multiple Devices 03/Oct/2012.pdf
RoHs Status
ROHS3 Compliant
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In stock: 17910

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Specifications

MC908LK24CPBE Tech Specifications
NXP USA Inc. - MC908LK24CPBE technical specifications, attributes, parameters and parts with similar specifications to NXP USA Inc. - MC908LK24CPBE

Product Attribute Attribute Value
Manufacturer NXP Semiconductors
Voltage - Supply (Vcc/Vdd) 3V ~ 5.5V
Supplier Device Package 64-LQFP (10x10)
Speed 8MHz
Series HC08
RAM Size 768 x 8
Program Memory Type FLASH
Program Memory Size 24KB (24K x 8)
Peripherals LCD, LVD, POR, PWM
Package / Case 64-LQFP
Package Tray
Product Attribute Attribute Value
Oscillator Type Internal
Operating Temperature -40°C ~ 85°C (TA)
Number of I/O 40
Mounting Type Surface Mount
EEPROM Size -
Data Converters A/D 6x10b
Core Size 8-Bit
Core Processor HC08
Connectivity I²C, IRSCI, SPI
Base Product Number MC908

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 3 (168 Hours)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8542.31.0001

Parts Introduction

MC908LK24CPBE Image
MC908LK24CPBE (1)

Manufacturer Part Number

MC908LK24CPBE

Manufacturer

NXP Semiconductors

Introduction

The MC908LK24CPBE is an 8-bit microcontroller from the NXP HC08 series, designed for embedded applications. It offers a range of features and peripherals, making it a versatile choice for various projects.

Product Features and Performance

8-bit HC08 core running at 8MHz

24KB of FLASH program memory

768 bytes of RAM

Peripherals: I2C, IRSCI, SPI, LCD, LVD, POR, PWM

40 I/O pins

6 x 10-bit ADC channels

Internal oscillator

Operating temperature range: -40°C to 85°C

Product Advantages

Robust 8-bit architecture suitable for cost-sensitive applications

Wide range of integrated peripherals for enhanced functionality

Low power consumption for battery-powered designs

Reliable performance in harsh environments

Key Reasons to Choose This Product

Proven 8-bit technology with a well-established ecosystem

Comprehensive set of peripherals for diverse application requirements

Cost-effective solution for embedded projects

Reliable operation in a wide temperature range

Quality and Safety Features

Robust design for industrial-grade applications

Compliance with relevant safety and regulatory standards

Compatibility

The MC908LK24CPBE is compatible with other HC08 series microcontrollers, allowing for easy integration and migration within the platform.

Application Areas

Industrial automation and control systems

Home appliances and consumer electronics

Automotive and transportation systems

Metering and monitoring devices

General-purpose embedded applications

Product Lifecycle

The MC908LK24CPBE is an obsolete product, meaning it is no longer in active production. However, there may be equivalent or alternative models available from NXP Semiconductors. Customers are advised to contact our website's sales team for more information on available options and product life cycle support.

Frequently Asked Questions(FAQ)

How does the MC908LK24CPBE compare to other HC08 series microcontrollers in terms of memory architecture and I/O allocation for embedded applications requiring moderate data logging?
The MC908LK24CPBE offers a balanced configuration with 24KB of on-chip FLASH program memory and 768 bytes of RAM, providing sufficient code space for complex state machines or protocol stacks while maintaining low power consumption. Its 40 general-purpose I/O pins allow flexible interfacing with sensors, displays, and communication peripherals, though this comes at the cost of limited pin count compared to higher-pin variants like the MC9S12 series. When compared to lower-memory HC08 models such as the MC908AP64, the LK24 trades raw I/O availability for optimized memory density, making it suitable for space-constrained designs where code efficiency outweighs peripheral expansion needs.
What are the key limitations of using the MC908LK24CPBE in battery-powered systems that require long-term operation under variable load conditions?
While the MC908LK24CPBE operates across a wide voltage range (3V–5.5V), its internal oscillator runs at a fixed 8MHz, which can lead to higher average current draw during active periods compared to devices with clock scaling or sleep modes that dynamically adjust frequency. With only 768 bytes of RAM, deep sleep states must preserve minimal context, limiting background data buffering. For battery-operated applications, these factors necessitate careful firmware optimization to minimize active time and leverage the device’s power-down modes effectively, especially since there is no dedicated low-dropout regulator or brown-out protection beyond standard POR functionality.
Can the MC908LK24CPBE support real-time control tasks involving multiple PWM channels and analog sensor inputs simultaneously without timing conflicts?
The MC908LK24CPBE includes six 10-bit ADC channels and hardware PWM peripherals capable of generating up to four independent pulse-width modulated outputs. However, due to shared interrupt vectors and limited timer resources within the HC08 core, simultaneous high-resolution PWM generation and rapid ADC sampling may require careful interrupt prioritization and DMA-like buffering implemented in software. Real-time performance depends heavily on firmware design; without hardware acceleration for concurrent operations, jitter in motor control or feedback loops could increase if not managed through deterministic scheduling.
In what scenarios would the absence of an external crystal oscillator on the MC908LK24CPBE be advantageous versus requiring one?
The MC908LK24CPBE relies solely on its internal 8MHz RC oscillator, eliminating the need for external crystals and saving board space and assembly cost—ideal for consumer electronics or mass-produced devices where timing accuracy requirements are moderate. This simplifies layout and improves reliability by removing passive components susceptible to shock or temperature drift. However, applications demanding precise timing—such as UART baud rate generation or synchronous communication protocols—may experience drift over temperature, making external crystals preferable despite added complexity.
How should designers evaluate thermal performance when integrating the MC908LK24CPBE into compact enclosures with limited airflow?
Although the MC908LK24CPBE is rated for -40°C to 85°C operation, continuous full-speed execution in enclosed environments can elevate junction temperature due to package dissipation characteristics typical of 64-pin QFPs. At 8MHz, power dissipation remains modest but non-negligible under sustained loads. Thermal resistance from junction-to-ambient must be factored into layout decisions, including adequate copper pour and avoidance of adjacent heat-generating components. In most industrial or automotive edge cases, natural convection suffices, but forced airflow or thermal vias should be considered for prolonged peak workloads.
What trade-offs exist between using the SPI versus I²C interface on the MC908LK24CPBE when connecting to EEPROMs or display controllers?
The MC908LK24CPBE supports both SPI and I²C through its integrated IRSCI and SPI modules, offering flexibility based on peripheral requirements. SPI provides higher throughput and full-duplex communication, beneficial for fast memory writes or parallel display updates, but consumes more GPIO pins and lacks built-in addressing. I²C reduces pin usage and enables multi-device sharing on a single bus but limits speed and requires pull-up resistors and arbitration logic. Selection hinges on data volume, number of slaves, and system complexity rather than raw performance alone.
Is it feasible to upgrade legacy designs using earlier HC08 variants to the MC908LK24CPBE while preserving existing PCB layouts and firmware structure?
Partial compatibility exists due to shared HC08 instruction set and similar pinouts among LQFP-based MC908 family members, but differences in peripheral mapping and clocking schemes may require firmware adjustments. The MC908LK24CPBE retains many legacy features such as LCD controller and watchdog timer, supporting backward integration in instrumentation panels or sensor nodes. However, developers must verify oscillator initialization routines and memory-mapped register addresses, as some peripherals have been reallocated. A targeted porting effort focusing on abstraction layers around timing-critical functions usually suffices for smooth migration.
How does the moisture sensitivity level (MSL) rating of 3 for the MC908LK24CPBE affect production handling and storage procedures?
Classified as MSL 3 (168-hour floor life), the MC908LK24CPBE must be stored under controlled dry ambient conditions after unpacking from moisture barrier bags to prevent damage during reflow soldering. Once exposed, it has a limited window before re-baking becomes necessary. Manufacturers typically recommend baking at 125°C for 24 hours if shelf life exceeds MSL thresholds. This aligns with standard JEDEC J-STD-033 practices and ensures reliability in high-volume SMT assembly lines where humidity control is critical.
What considerations apply when selecting decoupling capacitors for stable operation of the MC908LK24CPBE near its minimum supply voltage of 3V?
Near the 3V threshold, noise margins shrink, increasing susceptibility to transient dips during switching events. Designers should use low-ESR ceramic capacitors (typically 0.1µF) placed within 5mm of each VDD/VSS pair, supplemented by bulk capacitance (e.g., 10µF tantalum or film) at the power entry point. The internal linear regulator behavior and bypassing effectiveness directly impact reset stability and ADC linearity, particularly in noisy industrial environments where supply ripple could otherwise degrade measurement accuracy.
Does the MC908LK24CPBE support in-system programming (ISP) or require specialized debug hardware for firmware updates?
Yes, the MC908LK24CPBE supports in-circuit serial programming (ICSP) via its BKGD/MODA pin interface, enabling firmware updates without removing the microcontroller from the circuit. This facilitates field upgrades and debugging using standard NXP tools like BDM interfaces or compatible third-party programmers. However, successful ISP requires proper bootloader implementation or access to unprotected flash sectors, and failure modes during erase/write cycles can brick the device if power fails mid-operation—hence robust error handling and backup strategies are recommended.
How does the operating temperature range of -40°C to 85°C influence component selection for outdoor or vehicular applications using the MC908LK24CPBE?
The extended commercial temperature range covers most industrial and consumer applications but falls short of automotive-grade (-40°C to +125°C) requirements. For outdoor installations subject to rapid thermal cycling or direct sunlight, additional thermal management such as heatsinking or enclosure ventilation may be needed to maintain junction temperatures below derated limits. While the IC itself functions reliably within specification, surrounding passives and connectors must also meet similar ratings to ensure system-level robustness.
What impact does the fixed 8MHz internal oscillator have on baud rate accuracy in UART communication using the MC908LK24CPBE?
At 8MHz, the UART module uses fractional dividers to achieve common baud rates like 9600, 19200, and 115200, but inherent RC oscillator inaccuracy (±2% typical) introduces potential framing errors over long distances or high speeds. For reliable RS-232 or LIN bus communication, external crystals provide tighter tolerance (±30ppm), reducing cumulative bit errors. If baud rate deviation exceeds peripheral tolerance, misaligned samples corrupt data—particularly problematic in multi-node networks where clock synchronization matters.
Are there known limitations in using the LCD peripheral on the MC908LK24CPBE with custom character displays outside of standard segment mappings?
The integrated LCD controller supports multiplexed drive up to 16 segments with configurable duty cycles and bias voltages, but it assumes standard alphanumeric or seven-segment layouts. Custom dot-matrix or graphic displays often exceed segment limits or require dynamic content refresh, which the fixed-function peripheral cannot handle efficiently. Firmware-based scrolling or partial update techniques may work but consume CPU cycles and limit contrast control. External drivers like HT1621 are better suited for advanced display needs.
How does the lack of ECCN classification exemption affect procurement logistics for the MC908LK24CPBE in international projects?
Classified under EAR99 with ECCN 5A991.C, the MC908LK24CPBE is generally unrestricted for export to most countries, simplifying global sourcing. However, end-use verification may still apply in certain jurisdictions, and distributors sometimes impose internal compliance checks. Since it contains no cryptographic functions or radiation-hardened materials, regulatory burden is minimal compared to ITAR-controlled parts, facilitating easier cross-border distribution and reduced customs documentation overhead.
What role does the Power-On Reset (POR) feature play in ensuring reliable startup sequences with the MC908LK24CPBE?
The POR circuit monitors VDD and delays CPU execution until voltage stabilizes above a safe threshold, preventing erratic behavior during initial power ramp-up. Combined with optional Low-Voltage Detect (LVD), it guards against undervoltage conditions that could corrupt FLASH or RAM. Without external reset circuitry, the MC908LK24CPBE relies entirely on internal safeguards, making it suitable for simple systems but insufficient for fault-tolerant architectures requiring watchdog supervision or brown-out recovery beyond basic thresholds.
How can engineers mitigate risks associated with flash memory wear when deploying the MC908LK24CPBE in data-logging applications with frequent write cycles?
Although FLASH endurance is rated for ~10,000 erase/write cycles per sector, aggressive logging without wear leveling accelerates degradation. Implementing circular buffers, batch writes, or sparing mechanisms distributes erase events evenly across blocks. Given the MC908LK24CPBE’s limited RAM (768B), efficient data compression or selective retention policies are essential. Monitoring cycle counts via counters and triggering maintenance routines prevents premature failure—especially important in unattended monitoring nodes where replacement is impractical.
What are the implications of choosing surface-mount packaging (64-LQFP) for manual assembly versus automated production lines using the MC908LK24CPBE?
The 64-pin LQFP (10x10mm) offers excellent signal integrity and routing density but demands precise solder paste application and alignment during reflow. Manual assembly risks tombstoning or bridging due to fine pitch (0.5mm). Automated pick-and-place systems handle it efficiently, leveraging standardized footprints. For prototyping, breakout boards simplify handling, but production yields depend on stencil design and oven profiling. Thermal performance is comparable to SOIC alternatives, though smaller form factor increases risk of mechanical stress during handling.
How does the REACH status and RoHS compliance of the MC908LK24CPBE influence sustainability-focused design decisions?
As RoHS3 compliant and REACH unaffected, the MC908LK24CPBE contains no restricted substances like lead, mercury, or cadmium, aligning with green manufacturing mandates. This supports end-of-life recyclability and avoids legal penalties in regulated markets such as EU and California. Designers can confidently select it for consumer electronics or medical devices where environmental certifications matter, knowing supply chain transparency and material safety are assured across global distribution channels.

Parts with Similar Specifications

The three parts on the right have similar specifications to NXP USA Inc. MC908LK24CPBE

Product Attribute MC908LJ24CPBE MC908LJ24CPBER MC908LK24CPKE MC908LK24CPKER
Part Number MC908LJ24CPBE MC908LJ24CPBER MC908LK24CPKE MC908LK24CPKER
Manufacturer NXP USA Inc. NXP USA Inc. NXP USA Inc. NXP USA Inc.
Number of I/O - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Speed - - - -
Core Size - - - -
Data Converters - - - -
Program Memory Size - - - -
RAM Size - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Program Memory Type - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Base Product Number - DAC34H84 MAX500 ADS62P42
Peripherals - - - -
Core Processor - - - -
Series - - - -
Voltage - Supply (Vcc/Vdd) - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Connectivity - - - -
EEPROM Size - - - -
Oscillator Type - - - -

MC908LK24CPBE Datasheet PDF

Download MC908LK24CPBE pdf datasheets and NXP USA Inc. documentation for MC908LK24CPBE - NXP USA Inc..

Datasheets
MC68HC908LJ24,LK24.pdf
PCN Packaging
All Dev Label Update 15/Dec/2020.pdf
PCN Obsolescence/ EOL
Multiple Devices 03/Oct/2012.pdf
PCN Assembly/Origin
Multiple Devices Test 14/Aug/2013.pdf
Environmental Information
NXP USA Inc REACH.pdf NXP USA Inc RoHS Cert.pdf

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Customer Reviews

Evaluation: 10 Articles

  • Nath***rooks
    Jun 11, 2026

    Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.

  • Dani***alkerTech
    Jun 1, 2026

    Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

  • Yuki***aka88
    May 26, 2026

    信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

  • Stev***aker
    May 20, 2026

    Solid diode for power rectification. Works well in switching circuits.

  • Bran***Lewis
    May 11, 2026

    Compact FPGA with good performance. Suitable for basic signal processing tasks.

  • Oliv***arris
    May 7, 2026

    Reliable I/O expander. Works well in embedded control applications.

  • Jess***Jones
    Apr 17, 2026

    It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

  • Mich***Smith
    Apr 17, 2026

    Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

  • Aman***arris
    Apr 3, 2026

    It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.

  • Mike***nch
    Apr 3, 2026

    Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

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In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

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Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.
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Allelco is committed to exceeding customer expectations through customer service excellence, order accuracy, and on-time delivery.
This is achieved through our commitment to the continual improvement of our processes, services, and products.


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Electrostatic Discharge Protection and Handling

All electrostatic-sensitive components are handled in accordance with electrostatic discharge control procedures. The products are hermetically sealed in anti-static safe packaging to prevent electrostatic damage. Appropriate labeling is also applied for identification and traceability. This ensures product integrity during storage, handling and transportation.


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Third-party certified, strict quality control. Our certification
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MC908LK24CPBE Image

MC908LK24CPBE

NXP USA Inc.
32D-MC908LK24CPBE

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