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NXP Semiconductors MC9RS08LE4CWL
- Part No.:
- MC9RS08LE4CWL
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MC9RS08LE4CWL.pdf
- Description:
- IC MCU 8BIT 4KB FLASH 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,327
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Product details
Overview
MC9RS08LE4CWL from NXP Semiconductors (formerly Freescale) is an 8-bit RS08-core microcontroller with 4 KB flash, 256-byte RAM, integrated LCD driver (up to 8×14 segments), 10-bit ADC (8-channel), dual 16-bit TPM modules, SCI interface, and KBI - operating from 2.7 V to 5.5 V across –40°C to 85°C. It targets low-power embedded control in battery-operated instrumentation and industrial HMI panels.
For engineers reviewing the MC9RS08LE4CWL datasheet, MC9RS08LE4CWL pinout, MC9RS08LE4CWL application, or MC9RS08LE4CWL equivalent, this page delivers verified technical context, package mapping, real-world use scenarios, and validated alternative options for cost-sensitive, low-power MCU selection in legacy automotive and industrial designs.
Technical Context
The MC9RS08LE4CWL implements an RS08 CPU core - a streamlined subset of the HC08 instruction set augmented with BGND - executing at up to 20 MHz bus frequency via internal FLL (trimmed to ±0.2% resolution, ±2% deviation over voltage/temperature) or external crystal (31.25 kHz–20 MHz). Its system architecture integrates dedicated low-power modes (Wait, Stop), on-chip voltage regulation, and hardware security logic to prevent unauthorized flash access.
Peripherals are tightly coupled to power management: the LCD driver remains functional in Stop mode using internal resistor biasing; the 10-bit ADC operates down to 2.7 V with 2.5 μs conversion time and includes a 1.7 mV/°C temperature sensor; both TPM modules support edge- or center-aligned PWM, input capture, and output compare with independent clock gating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | RS08 8-bit core with BGND instruction; enables single-wire background debug and deterministic interrupt latency. |
| Flash / RAM | 4 KB flash (read/program/erase over full voltage/temperature range); 256-byte RAM with 0.81 V minimum retention voltage. |
| ADC | 8-channel, 10-bit SAR ADC; 2.5 μs conversion time; supports stop-mode operation; includes internal bandgap reference and temperature sensor. |
| LCD Driver | Supports up to 8×14 or 4×18 segments; compatible with 3 V or 5 V LCD glass; frontplane/backplane pins multiplexed with GPIO; functional in Wait/Stop modes. |
| Power Modes | Run (max 20 mA @ 10 MHz, 5 V), Wait (≈940 μA), Stop (1.43 μA typical + adders for ADC/LVI/RTI); LVD with selectable trip points. |
| Package | 28-pin SOIC (Case 751F); 11.5 mm × 7.5 mm footprint; θJA = 70 °C/W on single-layer board. |
| Clock Sources | Internal ICS (FLL-trimmed DCO: 16–20 MHz, ±0.2% resolution); external XOSC (31.25 kHz–20 MHz crystal/resonator). |
Pinout & Package
MC9RS08LE4CWL is housed in a 28-pin SOIC (Case 751F) package with 26 GPIOs - including one input-only (PTB0/RESET/VPP) and one output-only (PTB1/BKGD/MS) pin - plus VDD, VSS, EXTAL, XTAL, and dedicated LCD/TPM/SCI/KBI function pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PTB0 / RESET / VPP | Input-only reset and programming voltage pin | Accepts active-low reset pulse ≥150 ns; VPP = 10 V for flash programming; internally clamped to VSS only. |
| PTB1 / BKGD / MS | Output-only debug and master select pin | Single-wire background debug interface; drives BKGD signal during in-circuit debugging; no input capability. |
| PTA0–PTA7, PTD0–PTD7 | Multi-function GPIO ports | Support LCD segment drive, keyboard interrupt (KBI), ADC inputs (ADP0–ADP7), TPM channels, SCI RX/TX, and general-purpose I/O with configurable pull-up, slew rate, and hysteresis. |
| PTC0 / EXTAL, PTC1 / XTAL | External oscillator terminals | Connect to crystal or ceramic resonator (31.25 kHz–20 MHz); require external load capacitors per manufacturer spec. |
| VDD / VSS | Power supply and ground | Operates from 2.7 V to 5.5 V; supports simultaneous analog/digital domains (VDDAD/VSSAD separate pins available). |
Key Features
| Feature | Design Value |
|---|---|
| Low-power LCD operation | LCD driver remains active in Stop mode with internal resistor bias network - enables ultra-low-power display retention in battery-powered devices. |
| FLL-trimmed internal clock | ICS provides 16–20 MHz DCO output with ±0.2% resolution at fixed conditions and ±2% deviation over full voltage/temperature range - eliminates need for external crystal in cost-sensitive applications. |
| Hardware security lock | On-chip flash protection circuitry prevents unauthorized read-out or reprogramming - critical for firmware IP protection in production units. |
| Integrated temperature sensing | 10-bit ADC includes dedicated 1.7 mV/°C temperature sensor channel - enables thermal monitoring without external components. |
| Robust system supervision | Dual COP watchdog (bus clock or 1 kHz internal source), low-voltage detect with interrupt/reset, illegal opcode/address detection - ensures fail-safe operation in harsh environments. |
Applications
| Industrial Panel Meters | Automotive Cabin Controls |
|---|---|
|
Use Scenario: Standalone digital panel meter with 4-digit LCD display, pushbutton interface, and analog sensor inputs for voltage/current/temperature measurement. IC Role / Device Role / Timing Role: Primary controller managing LCD refresh, KBI scanning, ADC sampling, and serial data logging via SCI. Use Value: Integrated LCD driver and 10-bit ADC eliminate external drivers and converters; Stop-mode current <1.5 μA extends battery life in portable meters. |
Use Scenario: HVAC control module in entry-level vehicles, reading cabin temperature sensors and driving segmented LCD climate display. IC Role / Device Role / Timing Role: Real-time sensor acquisition and display update engine with fault-tolerant reset supervision. Use Value: AEC-Q100 qualified ESD/latch-up immunity (±2 kV HBM); -40°C to 85°C operation meets automotive ambient requirements; built-in LVD prevents erratic behavior during cold cranking. |
| Smart Appliance Keypads | Energy Meter Front-End |
|
Use Scenario: Touchless keypad interface for washing machines or microwaves, detecting button presses via KBI and driving local LED/LCD feedback. IC Role / Device Role / Timing Role: Dedicated keyboard interrupt handler with debounced scan and low-latency wake-from-Stop response. Use Value: 8-pin KBI with 100 ns minimum pulse width in Stop mode enables fast wake-up from deep sleep - reduces average system power by >90% vs. polling. |
Use Scenario: Residential electricity meter front-end acquiring voltage/current waveforms and updating LCD kWh display every 10 seconds. IC Role / Device Role / Timing Role: Low-jitter ADC sampling synchronized to line cycle; RTC-less timekeeping via RTI interrupt in Stop mode. Use Value: 0.6% long-term jitter on DCO clock ensures stable timing for energy computation; RTI adder of only 0.11 μA enables accurate 1-second intervals without external timer. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC9RS08KA2CFA | 2 KB flash, 128-byte RAM, no LCD driver, same RS08 core and ICS clock architecture. | Suitable for non-display applications requiring lower code density and reduced BOM cost. | Select when display functionality is unnecessary and flash/RAM requirements are ≤2 KB/128 B. |
| S9KEAZ128AMLH | Kinetis E-series ARM Cortex-M0+, 128 KB flash, 16 KB RAM, no integrated LCD driver, higher performance but larger footprint. | Targets next-generation designs needing upgrade path, USB, or CAN; requires external LCD biasing. | Choose for new designs requiring scalability, toolchain continuity with Kinetis, or future-proofing beyond RS08 lifecycle. |
Compared with MC9RS08LE4CWL, MC9RS08KA2CFA offers lower memory and no LCD support - ideal for cost-constrained non-display control; S9KEAZ128AMLH provides ARM-based performance and peripheral expansion but lacks native LCD drive and increases PCB area - best suited for migration paths rather than drop-in replacement.
Availability
MC9RS08LE4CWL is available at Aetrix Electronics and suitable for industrial panel meters, automotive cabin controls, smart appliance keypads, and energy meter front-ends requiring stable component supply and long-term obsolescence management.
Supply support for MC9RS08LE4CWL includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
NXP Semiconductors acquired Freescale in 2015 and maintains full support for the RS08 portfolio, delivering high-reliability microcontrollers for automotive, industrial, and consumer applications.
The MC9RS08LE4CWL belongs to the RS08 low-end MCU family, designed specifically for cost-sensitive, ultra-low-power embedded systems where integrated LCD driving, robust system supervision, and minimal external components are essential.
FAQ
What is the maximum bus frequency supported by the MC9RS08LE4CWL?
The MC9RS08LE4CWL supports a maximum bus frequency of 10 MHz when using the internal FLL-trimmed clock source, and up to 20 MHz when driven by an external crystal or resonator. The actual achievable frequency depends on supply voltage and temperature: at 2.7 V and –40°C, the guaranteed maximum is 10 MHz, while at 5.5 V and 25°C, it reaches 20 MHz. This is documented in Section 3.10.1 of the MC9RS08LE4 datasheet Rev. 3.
Does the MC9RS08LE4CWL support operation in Stop mode with the ADC enabled?
Yes, the MC9RS08LE4CWL supports ADC operation in Stop mode. When configured with asynchronous ADC clock (ADACK) enabled, the module can perform conversions with typical current adder of 128.72 μA at 25°C. The ADC retains full functionality including auto-compare, temperature sensor readout, and internal reference channel - enabling wake-up-on-threshold events without exiting Stop mode. This capability is specified in Table 8 and Section 3.11 of the MC9RS08LE4 datasheet.
What LCD configurations does the MC9RS08LE4CWL support?
The MC9RS08LE4CWL supports two LCD configurations: up to 8 backplanes × 14 segments (8×14) or 4 backplanes × 18 segments (4×18), using its integrated resistor bias network. It is compatible with both 3 V and 5 V LCD glass displays, and all LCD pins (LCD0–LCD21) are multiplexed with GPIO functions. Frontplane and backplane assignments are software-configurable, and the driver remains fully operational in Wait and Stop modes - enabling ultra-low-power display retention. Details appear in Section 2.1 and Table 2-1 of the MC9RS08LE4 datasheet.
Is the MC9RS08LE4CWL pin-compatible with other RS08 family members?
No, the MC9RS08LE4CWL is not pin-compatible with other RS08 MCUs such as the MC9RS08KA2 or MC9RS08LA8. While all share the RS08 core architecture, the MC9RS08LE4CWL uses a unique 28-pin SOIC package with specific pin allocations for its integrated LCD driver (22 LCD segment pins), dual TPM modules, and KBI inputs - resulting in distinct pin mapping. Pin compatibility must be verified per device-specific pin assignment tables; no cross-family pin-to-pin replacement is supported.
What debug interface does the MC9RS08LE4CWL provide?
The MC9RS08LE4CWL provides a single-wire background debug (BDC) interface via the PTB1/BKGD pin, supporting in-circuit debugging with breakpoint capability and memory access without halting real-time peripherals. This interface requires only one dedicated pin and is compatible with standard Freescale/NXP BDM debug tools. It does not support JTAG or SWD. The debug protocol is defined in the MC9RS08LE4 Reference Manual (MC9RS08LE4RM) and enables full flash programming, register inspection, and runtime variable monitoring.
MC9RS08LE4CWL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Series:
- RS08
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- RS08
- Core Size:
- 8-Bit
- Speed:
- 20MHz
- Connectivity:
- SCI
- Peripherals:
- LCD, LVD, POR, PWM, WDT
- Number of I/O:
- 26
- Program Memory Size:
- 4KB (4K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 256 x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- A/D 8x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MC9RS08LE4CWL FAQ
1.How can I place an order for MC9RS08LE4CWL through Aetrix?
Please submit a Request for Quotation (RFQ) for MC9RS08LE4CWL on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MC9RS08LE4CWL reliable?
The price and inventory of MC9RS08LE4CWL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC9RS08LE4CWL is usually 5 days.
3.What payment methods are accepted for MC9RS08LE4CWL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC9RS08LE4CWL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC9RS08LE4CWL?
MC9RS08LE4CWL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC9RS08LE4CWL order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MC9RS08LE4CWL?
For technical support, including MC9RS08LE4CWL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC9RS08LE4CWL requirements.
6.How does Aetrix verify that MC9RS08LE4CWL is sourced from the original manufacturer or authorized distributors?
All MC9RS08LE4CWL products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MC9RS08LE4CWL meets industry standards.
7.What is the process for return or replacement of MC9RS08LE4CWL?
All MC9RS08LE4CWL units undergo pre-shipment inspection (PSI). If there is an issue with MC9RS08LE4CWL, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MC9RS08LE4CWL part is unused and in its original packaging.
Return procedure for MC9RS08LE4CWL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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