MC9RS08LE4CWL - 20MHz 8-Bit MCU with 4KB Flash | NXP
MPN: MC9RS08LE4CWL ✓ Active| Qty | Unit Price | Extended |
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| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
MC9RS08LE4CWL Overview
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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MC9RS08LE4CWL Maximum Ratings & Electrical Characteristics
| Product Type | 8-bit microcontroller |
| Core | RS08 |
| CPU Maximum Frequency | 20 MHz |
| Flash Memory | 4KB (4K x 8) |
| Data Bus Width | 8 bit |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Package | 28-pin SOIC |
| Mounting Type | Surface Mount |
| LCD Feature | LCD driver integration indicated by manufacturer-series description |
| Processor Series | RS08LA |
| Manufacturer | NXP Semiconductors |
| Legacy Manufacturer | Freescale Semiconductor |
| Microcontroller Category | Integrated Circuits > Microcontrollers |
| RoHS | unknown |
| REACH | unknown |
| AEC-Q100 Qualification | not_applicable |
| Lead-Free Status | unknown |
| Halogen-Free Status | unknown |
| Conflict Minerals | unknown |
MC9RS08LE4CWL 28-pin soic Pin Configuration Guide
Pin configuration for MC9RS08LE4CWL (28-pin soic package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for MC9RS08LE4CWL.
Refer to the datasheet for full pin configuration.
Typical Applications
MC9RS08LE4CWL is suitable for 6 applications: LCD Keypad Controller, Compact Appliance Controller, Sensor Node, Small Instrumentation Panel, Embedded Keypad Interface, Low-Voltage Embedded Control Board.
LCD Keypad Controller
The MC9RS08LE4CWL fits an LCD keypad or small display-control module because the RS08LE family is identified with LCD-driver capability and the MCU provides a 20 MHz maximum CPU clock for responsive input scanning and display updates. Its 4KB Flash memory is appropriate for compact keypad firmware, display mapping, debounce logic, and a small state machine. The verified data does not state the LCD segment count or bias configuration, so the selected glass must be checked against the exact datasheet before layout is finalized.
Recommended
Compact Appliance Controller
The MC9RS08LE4CWL is suitable for a compact appliance controller when the product needs an 8-bit embedded processor, low-voltage operation, and limited flash capacity rather than high compute performance. Its 20 MHz clock can execute control logic, button handling, sensor thresholds, and actuator sequencing, while the 2.7 V to 5.5 V range supports common embedded rails. Firmware memory must be sized carefully because the verified specification lists only 4KB of Flash.
Recommended
Sensor Node
The MC9RS08LE4CWL can serve as the control core of a small sensor node when the node performs local acquisition, thresholding, status reporting, and low-speed communication. The 20 MHz RS08 CPU provides timing headroom for interrupt-driven peripherals, while 4KB Flash limits the application to compact firmware and simple protocol stacks. The verified results do not specify ADC channels, communication peripherals, or standby current, so those functions must be confirmed before selecting the MCU for a sensor design.
Recommended
Small Instrumentation Panel
For a small instrumentation panel, the MC9RS08LE4CWL can manage keypad input, status LEDs, a basic display, and control outputs within a compact 28-pin SOIC footprint. Its 8-bit RS08 architecture is appropriate for supervisory rather than high-throughput processing, and the 20 MHz clock supports deterministic control code. Because verified data does not identify the complete peripheral list, verify display resources, I/O count, timers, and communication interfaces against the manufacturer datasheet.
Recommended
Embedded Keypad Interface
The MC9RS08LE4CWL is a practical candidate for an embedded keypad interface requiring matrix-key scanning, debounce, mode selection, and simple output control. A 20 MHz CPU allows scanning and event handling to execute with useful timing margin, while 4KB Flash can support compact firmware and lookup tables. The supplied data does not specify GPIO count or debounce resources, so pin assignment and timing should be checked in the datasheet and validated in hardware.
Recommended
Low-Voltage Embedded Control Board
The MC9RS08LE4CWL supports a low-voltage embedded control board operating from the verified 2.7 V to 5.5 V range. Its compact 28-pin SOIC package can simplify board integration when external components are modest, and the RS08 CPU is suitable for sequencing relays, reading switches, and maintaining basic system state. The design must account for the limited 4KB Flash budget and verify regulator tolerance, oscillator requirements, and all absolute maximum ratings in the datasheet.
Recommended
Recommended Products Summary
Engineering reference data for MC9RS08LE4CWL — comparison, design guidance, and compliance information.
Selection Guide
Key Differentiators
- Compact 8-bit RS08 control platform (vs MC9S08LE4CWL)
- 4KB Flash target for compact firmware (vs Higher-memory RS08 or S08 MCUs)
- 2.7 V to 5.5 V operating range (vs Lower-voltage-only MCU options)
- LCD-oriented family integration (vs General-purpose MCUs without the same LCD feature set)
Design Notes
Start the PCB layout by placing the MC9RS08LE4CWL against the verified 28-pin SOIC footprint and preserve access to all programming, power, ground, clock, and LCD-related pins. Route the supply connection as short and low-inductance as possible, and place the required bypass capacitor close to the device power pins. Do not rely on a generic SOIC land pattern without checking pin numbering, exposed connections, and manufacturer recommended pad dimensions.
Design the supply around the verified 2.7 V to 5.5 V operating range. Confirm the exact absolute maximum voltage, current consumption, startup behavior, and regulator tolerance in the NXP datasheet. If the MCU drives LCD segments, relays, LEDs, or other loads, budget their current separately rather than assuming the MCU supply rail can absorb the load. Use local filtering and a stable reference supply to reduce noise-induced display or control errors.
The most important substitution risk is assuming that a similar RS08 or S08 MPN is automatically interchangeable. Verify the exact 28-pin SOIC pinout, supply limits, clock source, Flash size, memory map, programming interface, LCD resources, and peripheral assignments. A device with the same family name or package may still require firmware, board, or timing changes. Validate a candidate on hardware before production release.
Because the verified data does not state the internal LCD-drive details, preserve routing flexibility until the selected glass and MCU pin assignment are confirmed. Keep display traces away from noisy switching nodes and provide a clean ground reference for the MCU and display system. Review reset, oscillator, and programming signals for adequate rise time and routing margin. The manufacturer datasheet should control all timing and layout values.
Compliance Information
The supplied verified data does not provide exact-MPN compliance declarations. RoHS, REACH, lead-free, halogen-free, and conflict-minerals status must be confirmed from NXP or an authorized distributor.
