কোম্পানির ব্লগ সম্পর্কে NXP MCHC908LK24 High-Performance M68HC08 Series 8-Bit Microcontroller

Shenzhen Mingjiada Electronics Co., Ltd. NXP MCHC908LK24 high-performance M68HC08 series 8-bit microcontroller.

I. MCHC908LK24 Product Details
The MC908LK24 utilises the CPU08 enhanced 8-bit core and belongs to the high-performance branch of the M68HC08 series. Featuring a low-power static architecture and supporting on-chip in-circuit programming, it is a well-established choice for early industrial control and display applications.

The core bus operates at up to 8 MHz with a 5 V supply, with a minimum instruction cycle time of 125 ns; under 3.3 V operating conditions, the bus runs at 4 MHz with an instruction cycle time of 250 ns. The instruction set incorporates hardware multiplication and division operations, along with 16 addressing modes, offering superior computational efficiency compared to standard 8-bit MCUs of the same era.

The memory configuration comprises 24KB of on-chip Flash programme memory and 768B of on-chip RAM; the Flash supports encryption protection to prevent firmware cloning, meeting the intellectual property protection requirements of mass-production equipment.

Peripheral resources are highly integrated: a built-in LCD driver module, a 6-channel 10-bit SAR ADC, and dual 16-bit TIM timers (supporting input capture, output comparison and PWM generation); Communication interfaces include SPI, I²C and an IRSCI serial port with infrared modulation capability, enabling direct connection to infrared remote control transceivers; complemented by LVD (low voltage detection), POR (power-on reset), COP (watchdog) and keyboard interrupt modules, thereby reducing the BOM cost of peripheral components.

Electrical Specifications and Packaging: Operating voltage range 2.97 V to 5.5 V; industrial-grade temperature range -40 °C to +85 °C; mainstream packages include LQFP64 and LQFP80, surface-mount, RoHS-compliant, suitable for high-volume SMT production.

Typical applications: single-phase electricity meters, thermostats, air conditioners, microwave ovens, boiler controllers, portable medical devices, infrared remote controls, small household appliances with segmented LCD displays, and simple industrial panel controls.

Product status: This model belongs to NXP’s legacy HC08 series, which has been discontinued (NRND) by the original manufacturer. For new design projects, the S08 and Kinetis series are generally the preferred choices; the primary procurement demand for the MC908LK24 arises from the repair of existing equipment, the replication of legacy designs, and small-batch replacement scenarios.

II. MCHC908LK24 Procurement Selection and Buyer’s Guide
1. Key Considerations for Selection
Prioritise confirming the nature of the requirement: for new project development, the MC908LK24 is not recommended; it is advised to evaluate compatible alternatives from the NXP S08 series to secure ongoing technical support from the original manufacturer, access to the latest development tools, and a sufficient long-term supply. The MC908LK24 should only be selected for the maintenance of legacy equipment where the PCB cannot be modified and firmware cannot be migrated.
Check the part number suffix to distinguish between versions: the suffixes CFUE and CFQE denote different packaging and batch specifications. When purchasing, the full part number must match; differences in suffixes will affect pin definitions, the number of LCD drive channels and temperature rating, and the parts are not directly interchangeable.
Key parameter checklist: whether the power supply is 3.3V or 5V; whether a segmented LCD driver is required; whether the IRSCI infrared function is used; the number of ADC channels; the operating temperature grade; and the package pad specifications.
Risk Identification: These are original manufacturer discontinued models. Market supply consists of a mix of **original manufacturer end-of-line stock, stock from authorised channels, and components salvaged from disassembled units**, making them high-risk components. It is highly likely to encounter refurbished, re-polished or faulty chips, which may result in latent faults such as failure of Flash write protection, LCD drive ghosting, ADC temperature drift exceeding specifications, and serial port packet loss at low temperatures.

2. Risk Control Recommendations for Buyers
1. Clearly define requirements: Before placing an order, inform the supplier of the intended use (repair / prototype replication / small-batch trial production), whether you reject parts sourced from dismantled devices, whether you require original manufacturer trays with original labels, and whether you need a Certificate of Conformity (COC) and batch traceability report;
2. Samples first: Regardless of order size, obtain samples first to conduct full-functionality verification, covering high and low temperature testing, power-off reset, repeated Flash erase/write cycles, and prolonged LCD backlight ageing tests;
3. Avoid low-price traps: Supplies priced significantly below normal market stock prices are highly likely to be refurbished, re-polished or sorted from defective items;
4. Lead time expectations: Discontinued components are not subject to the original manufacturer’s production schedule; lead times depend on spot stock availability. Long-term, continuous replenishment is not supported; it is recommended to prepare alternative MCU solutions simultaneously as a contingency plan in the event of supply disruption.

III. Mingjiada Electronics: MC908LK24 Supply Quality and Delivery Assurance
Shenzhen Mingjiada Electronics adopts a business model combining spot supply with the recovery of idle stock for NXP’s legacy HC08 series components. This model caters to the procurement needs of industrial control, metering and household appliance repair manufacturers for discontinued legacy MCUs, whilst also undertaking the recovery and disposal of customers’ surplus and idle MC908LK24 stock.

1. Quality Control on the Supply Side
Targeted sourcing: Priority is given to end-of-line stock from authorised overseas distributors and original factory-sealed pallet stock. A strict distinction is made between brand-new, factory-sealed components and refurbished components; material grades are clearly labelled for external parties, with no mixing of stock or concealment of material condition; All incoming batches undergo re-inspection upon arrival, including visual inspection, pin scanning, Flash read/write testing, ADC sampling verification and communication interface connectivity testing; we reject devices that have been sanded, re-labelled on tape or are functionally defective; we can provide batch documentation and factory test reports, support re-testing by third-party laboratories, and meet the quality traceability requirements of industrial clients.
Product Line Support Capabilities: In addition to the MC908LK24, we simultaneously supply the full range of NXP S08, Kinetis and LPC MCUs, as well as signal chain and power management devices from brands such as TI, ADI, ST and Microchip. Customers can source their entire BOM from a single source, reducing the costs associated with managing multiple suppliers.

2. Delivery and Service Advantages
Stock on Hand: We maintain a standing inventory of components frequently discontinued in the repair market, enabling rapid dispatch of small-batch samples and small-to-medium-volume orders; for large-volume stock orders, we lock in batch numbers and prices in advance to mitigate the risk of price surges due to product discontinuation;
Flexible delivery options: We support various shipping formats—including pallets, tape-and-reel, and tubes—to meet customers’ SMT production line requirements; for scarce items, we can initiate global sourcing through our channels, whilst clearly communicating sourcing lead times and material risks—we never make false promises regarding delivery dates;
Comprehensive technical support: We assist customers in verifying the MC908LK24 package, pin definitions and errata, and provide recommendations for alternative part numbers; For customers’ legacy projects, we simultaneously evaluate pin-to-pin compatible alternatives to proactively address the risk of future supply disruptions;
Recycling Service Description: Mingjiada simultaneously recycles idle NXP HC08 series components from factories and distributors, including MC908LK24, MC908LJ24 and other models in the same family. During the recycling process, we verify part numbers, year of manufacture, packaging, appearance and functionality through standardised procedures, helping customers liquidate idle stock.

3. Recommended Solutions for Clients
Suitable for electricity meter manufacturers, home appliance solution providers, industrial controller maintenance organisations, and equipment repair service providers. These clients have significant maintenance requirements for existing equipment, and stable, transparent, and traceable stock of discontinued MCUs is a key priority. For new products requiring high-volume mass production, Mingjiada’s technical team will proactively guide clients to switch to mainstream, currently available NXP MCUs to mitigate long-term supply risks.