MC9S08SE8CWL - 20MHz 8KB 8-Bit MCU | NXP | 28-SOIC
料号： MC9S08SE8CWL ✓ 量产中MC9S08SE8CWL 概述
A microcontroller is a programmable integrated circuit containing a processor core, memory, and peripherals on one die. The S08 architecture belongs to the 8-bit embedded-control segment, where instruction simplicity, deterministic peripheral access, and broad I/O availability are often more important than maximum processing throughput. The MC9S08SE8CWL is therefore useful for control tasks involving digital inputs, analog measurement, timers, communications, and user-interface functions.
Key device characteristics include 8 KB (8K x 8) flash memory, a 20 MHz CPU clock, a 10 MHz internal bus frequency, and a 10-channel 10-bit ADC. Its 2.7 V to 5.5 V operating range supports both 3.3 V and 5 V systems. The 28-pin SOIC package provides a conventional surface-mount footprint while exposing enough pins for external sensors, actuators, communication interfaces, and general-purpose I/O.
The S08SE family is designed to maintain compatibility with the wider Freescale Semiconductor 5 V MCU portfolio at the peripheral, pin, and tooling levels. Its flash memory supports field-programmable embedded applications, while the 10-bit ADC provides useful resolution for monitoring potentiometers, resistive sensors, and simple analog control loops without requiring a separate converter.
Typical uses include low-cost appliance controllers, small industrial monitoring modules, digital thermometers, keypad interfaces, LED indicators, compact sensor nodes, and basic motor or actuator controllers. The 20 MHz clock provides adequate headroom for interrupt-driven control, while the 8 KB program-memory ceiling favors concise firmware and peripheral-heavy designs.
Hardware design should preserve adequate decoupling at the supply pins and assign each analog input with suitable signal conditioning. Firmware should also account for the 8 KB flash limit, verify reset and interrupt behavior, and use the manufacturer's pin-description table when assigning the 28 available package connections.
This page combines manufacturer specifications, package details, practical application guidance, and a qualification-focused comparison of candidate replacements. It is intended to help engineers assess compatibility before committing a 28-SOIC PCB design to the MC9S08SE8CWL.
直接替换替代料： MC9S08SE8CWL ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： MC9S08SE8CWL （相同外形与封装尺寸） ——差异在于 EEPROM, Operating Temperature, Package, RAM.
该产品暂无直接替换替代料。
请求替代料MC9S08SE8CWL 最大额定值与电气特性
| Product Type | 8-bit S08SE microcontroller |
| CPU Core | S08 / HCS08 |
| CPU Architecture | 8-bit |
| Maximum CPU Frequency | 20 MHz |
| Internal Bus Frequency | 10 MHz |
| Flash Program Memory | 8 KB (8K x 8) |
| EEPROM | None |
| RAM | 512 bytes (512 x 8 bits) |
| Supply Voltage Range | 2.7 V to 5.5 V |
| ADC Resolution | 10-bit |
| ADC Channel Count | 10 channels |
| Oscillator Type | Internal |
| 工作温度 | -40 °C to +85 °C |
| 封装 | 28-pin SOIC |
| 安装类型 | Surface Mount |
| Program Memory Type | Flash |
MC9S08SE8CWL 28-pin soic 引脚配置指南
MC9S08SE8CWL（28-pin soic 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： MC9S08SE8CWL.
请参阅 数据手册 以查看完整引脚配置。
典型应用
MC9S08SE8CWL 适用于 6 应用s: Industrial Sensor Monitoring, Low-Cost Appliance Control, Digital Thermometer and Panel Interface, LED and Keypad Controller, Compact Actuator Controller, Legacy 5 V Embedded System.
Industrial Sensor Monitoring
The MC9S08SE8CWL fits compact industrial monitoring modules because its 10-channel, 10-bit ADC can acquire several analog sensor signals while the 20 MHz S08 core handles filtering, thresholding, and status updates. Its 2.7 V to 5.5 V supply range supports 3.3 V and 5 V installations. Place the controller near the sensor input, condition each channel to the ADC input range, and use the 28-pin SOIC footprint to provide communication, alarm, and digital-control connections without excessive board area.
推荐
Low-Cost Appliance Control
The MC9S08SE8CWL is appropriate for appliance control boards where a deterministic 8-bit CPU, flash program memory, and ample I/O are more useful than high processor throughput. The 20 MHz clock can manage buttons, relays, indicators, timers, and protection sequencing, while 8 KB of flash accommodates a focused control application. Its 28-pin SOIC package is easy to assemble and inspect, and the 2.7 V to 5.5 V operating range fits legacy 5 V appliance electronics.
推荐
Digital Thermometer and Panel Interface
A digital thermometer or control-panel interface can use the MC9S08SE8CWL to acquire analog temperature signals, drive a small display, scan keys, and manage indicator LEDs. The 10-bit ADC provides 1,024 distinguishable code levels, suitable for basic temperature measurement and threshold control, while the 20 MHz core provides responsive keypad and display servicing. Place analog inputs away from switching nodes, provide local supply bypass capacitance, and verify the display interface timing during firmware development.
推荐
LED and Keypad Controller
The MC9S08SE8CWL can serve as a dedicated LED and keypad controller in instruments, access panels, and small user interfaces. Its 28-pin SOIC package provides enough connections for multiple buttons, status LEDs, and supporting logic, while the 20 MHz S08 core leaves processing margin for debouncing, animation, and serial reporting. Program the 8 KB flash conservatively to preserve room for diagnostics, and confirm that every intended port pin remains usable with the selected peripherals and programming configuration.
推荐
Compact Actuator Controller
The MC9S08SE8CWL can coordinate a small actuator, relay, valve, or motor-control subsystem when the design is dominated by sequencing, interlocks, and status feedback rather than intensive computation. The 20 MHz CPU supports responsive interrupt handling, and the 10-bit ADC can monitor a feedback signal or supply condition. Use appropriate driver circuitry for inductive loads, include protection against transients, and confirm that the 2.7 V to 5.5 V controller supply remains stable during switching events.
推荐
Legacy 5 V Embedded System
The MC9S08SE8CWL is well suited to maintaining or modernizing a 5 V embedded subsystem that benefits from flash programmability and a compact surface-mount footprint. Its 2.7 V to 5.5 V range includes 5 V, while the S08SE family maintains compatibility with the established Freescale Semiconductor 5 V MCU portfolio at the pin, peripheral, and tool levels. Designers should inventory every reused signal, validate programming and debug functions, and review the 8 KB flash limit against the complete application.
推荐
推荐产品汇总
工程参考数据： MC9S08SE8CWL ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 |
|---|---|
| Package | 28-pin SOIC |
| Brand | NXP Semiconductors |
| CPU Architecture | 8-bit |
| CPU Core | S08 / HCS08 |
| Maximum CPU Frequency | 20 MHz |
| Internal Bus Frequency | 10 MHz |
| Flash Program Memory | 8 KB (8K x 8) |
| RAM | 512 bytes (512 x 8 bits) |
| Supply Voltage Range | 2.7 V to 5.5 V |
| ADC | 10 channels, 10-bit |
| Operating Temperature | -40 °C to +85 °C |
| Oscillator | Internal |
关键差异点
- Doubled flash capacity within the related S08SE family （对比 MC9S08SE4MWL)
- Higher documented CPU clock than the MC9S08SH4MTG comparison candidate （对比 MC9S08SH4MTG)
- S08SE-family continuity for 5 V embedded products （对比 MC9S08SH8MTJ)
设计说明
Use the manufacturer package drawing and pin-description table when assigning the 28-pin SOIC footprint. Place the supply bypass capacitor close to the power pins, provide a clean ground-return path, and route analog inputs away from digital switching edges. Confirm that programming and debug signals remain accessible if the board is expected to support in-circuit programming.
The documented 2.7 V to 5.5 V operating range supports both 3.3 V and 5 V designs, but the selected rail must remain stable under peripheral loading. Check the maximum operating frequency and peripheral limits at the chosen supply voltage. Where a 5 V MCU drives 3.3 V peripherals, use suitable level translation rather than assuming every output pin is automatically 3.3 V tolerant.
Firmware growth is a common risk because the device contains only 8 KB of flash and no EEPROM. Budget space for boot logic, interrupt routines, constants, calibration data, and optional updates. If a proposed substitute provides only 4 KB of flash, treat it as a functional alternative requiring firmware reduction rather than an automatic drop-in replacement.
The 10-bit ADC is intended for embedded measurement, but accurate readings depend on the analog front end. Keep sensor traces short, use a defined ground reference, minimize coupling from switching nodes, and allow sufficient acquisition time through the device's ADC timing. Verify the input range and maximum source impedance against the manufacturer electrical characteristics before finalizing the schematic.
合规信息
The manufacturer product page and technical data do not provide explicit compliance declarations for this record. Confirm the current material and environmental declarations with NXP before release to production.
