MC9RS08LE4CWL
MC9RS08LE4CWL - 20MHz 8-Bit MCU with 4KB Flash | NXP
The NXP Semiconductors MC9RS08LE4CWL is an RS08LE 8-bit microcontroller with a 20 MHz maximum CPU frequency, 4KB of Flash memory, and a 28-pin SOIC package. It is designed for cost-sensitive embedded products requiring a compact MCU, LCD-driver integration, and flexible low-voltage operation.
A microcontroller is a programmable semiconductor system that integrates a CPU, memory, peripherals, and input/output interfaces on one chip. The MC9RS08LE4CWL belongs to the broader hierarchy of embedded MCU, 8-bit MCU, RS08 microcontroller, and integrated circuit. Its small memory footprint and integrated LCD-oriented features are useful for human-interface and control products rather than high-compute systems.
The verified listing identifies an RS08 central processor unit, 8-bit data-bus width, 4KB Flash, and operation up to 20 MHz. Search results also identify a 2.7 V to 5.5 V supply range and a stated temperature range extending to 85°C. These parameters position the device for low-voltage embedded controls, display modules, appliance interfaces, and compact industrial or consumer products.
The RS08 architecture provides a straightforward 8-bit execution platform for supervisory logic, keypad scanning, sensor reading, display updates, and basic motor or actuator control. Because the available verified data does not provide a complete peripheral inventory, detailed memory map, pin-level electrical limits, or LCD-segment count, those details must be checked against the manufacturer datasheet before a design is released.
Typical applications include LCD-based keypads, small appliance controllers, sensor nodes, instrumentation panels, and compact embedded control boards. The 20 MHz maximum CPU clock supports responsive control-loop execution, while 4KB Flash limits firmware complexity; code size, boot behavior, and update requirements should therefore be reviewed early in the design cycle.
For PCB design, confirm the exact 28-pin SOIC footprint, power decoupling, oscillator requirements, programming interface, and all LCD and I/O pin assignments from the datasheet. Do not substitute a similarly named RS08 or S08 device unless its package, pinout, memory map, voltage range, clocking, and peripheral functions have been verified as compatible.
This product page consolidates the verified distributor descriptions, manufacturer datasheet link, package information, application guidance, and engineering cautions for engineers evaluating the MC9RS08LE4CWL.
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