MC908JL3ECFAE
MC908JL3ECFAE - 8MHz 8-bit HC08 MCU 4KB Flash 48-LQFP | NXP
The NXP MC908JL3ECFAE is an 8-bit M68HC08-family microcontroller unit (MCU) featuring a CPU08 core running at up to 8 MHz, 4 KB of on-chip FLASH program memory, 128 bytes of RAM, and a 48-pin LQFP (7x7 mm) package. It belongs to the low-cost, high-performance HC08JK/HC08JL sub-family designed for cost-sensitive embedded control applications such as consumer appliances, motor control, LED lighting, and small industrial control boards. The part is also marked as "No Longer Manufactured" on the NXP product page, putting it into an obsolete lifecycle state where remaining inventory is sold through distributors and authorized aftermarket channels (e.g., Rochester Electronics, Flip Electronics).
A microcontroller (MCU) is a single-chip computer that integrates a CPU, volatile memory (RAM), non-volatile memory (FLASH/ROM), and peripheral interfaces into one package. Within the broader IC hierarchy, an MCU sits at the intersection of digital ICs and microcontrollers; the HC08 line further specializes as an 8-bit CISC architecture aimed at legacy code reuse and easy migration from the earlier HC05 family. The MC908JL3ECFAE specifically targets designs that need small FLASH, modest RAM, and rich on-chip analog/digital peripherals without the cost penalty of a 32-bit ARM core.
Key features of the MC908JL3ECFAE include an integrated ADC for analog signal acquisition, PWM channels for motor or LED dimming control, an LED driver interface, low-voltage detection (LVD), power-on reset (POR), and multiple timers. The CPU08 core executes most instructions in 2 bus cycles (with internal clock doubling equivalent to ~4 MHz effective throughput per MHz) and supports the HC05 instruction set for source-level compatibility. The 48-LQFP (7x7) package provides 32 or more general-purpose I/O pins depending on peripheral allocation, suitable for moderate pin-count designs.
Technically, the part operates across a 2.7V-5.5V supply range and includes both internal oscillator and external clock options. Its FLASH memory supports in-application reprogramming via the standard HC08 background debug module, enabling firmware updates without removing the chip from the board. The 'E' suffix in the part number indicates an extended temperature range (-40C to +125C), making it suitable for industrial and automotive under-hood environments.
Typical applications of the MC908JL3ECFAE include small appliance control (washing machines, microwave ovens, rice cookers), LED lighting controllers, fan and pump motor drives, simple sensor hubs, and battery-management front-ends. The combination of PWM, ADC, and timer peripherals allows designers to build closed-loop control loops with minimal external components.
When designing with this part, note that the HC08 toolchain is mature but legacy: most engineers now use the newer S08 or S12 families for new designs. For new production, evaluate pin-compatible S08 successors; for repair and legacy support, source the MC908JL3ECFAE through authorized channels with full traceability.
This page synthesizes current distributor stock, lifecycle status, datasheet links, and same-family alternatives that physical-pinmap to the original footprint, giving engineers a single reference point that distributor product pages do not aggregate.
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