MC9S08QB4CWL - 8-Bit 20MHz 4KB MCU | NXP | Embedded Control
MPN： MC9S08QB4CWL ✗ 停產MC9S08QB4CWL 概覽
What is an 8-bit microcontroller? An MCU is a semiconductor containing a CPU, program memory, data memory, and peripherals on one integrated circuit. It belongs to the embedded-control and microcontroller hierarchy, where firmware repeatedly monitors inputs, executes control logic, and drives outputs. The HCS08 CPU in this device uses an 8-bit architecture suited to cost-sensitive, compact control systems rather than compute-heavy applications.
Key verified features include a maximum CPU frequency of 20 MHz, 4 KB of Flash memory, a 28-SOIC package, and an operating temperature range of -40 °C to +85 °C. Available connectivity features described in the retrieved component data include I2C, LIN, SCI, and SPI. The low-power MCU positioning also makes the device relevant to battery-operated controls, small appliances, and compact automation modules.
The S08 architecture integrates the processor and embedded peripherals into a single device, allowing a design to replace separate discrete control logic. The 4 KB Flash capacity supports firmware storage for simple control loops, while the 20 MHz clock provides execution headroom for peripheral handling. However, memory and CPU capacity should be checked against the final firmware image because the verified data does not provide RAM size, ADC details, GPIO count, or voltage limits.
Typical applications include LED and keypad control, low-power embedded modules, small motor or actuator controllers, serial-connected sensors, and compact industrial-control panels. NXP’s product page describes the QB family as an 8-bit MCU solution featuring integrated keyboard-interface capability and high-current LED drivers, while the retrieved component listing also identifies I2C, LIN, SCI, and SPI connectivity.
For PCB design, confirm the complete pinout and electrical limits against the manufacturer datasheet before layout. Keep the 20 MHz clock and decoupling layout clean, use the package-specific footprint, and verify that the intended serial interfaces meet the system’s voltage, timing, and protocol requirements.
This page consolidates verified distributor specifications, lifecycle information, sourcing references, and application-oriented design guidance. Because the device is identified by NXP as End of Life, long-term designs should confirm availability, migration options, and any approved replacement before committing new production releases.
直接替換替代品，適用於 MC9S08QB4CWL — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： MC9S08QB4CWL （相同外形與佔位） — 差異在於 Package, Flash Memory, CPU Architecture, Operating Temperature Range, Supply Voltage Range.
MC9S08QE4CWJ
✅ 直接替換聯絡詢價
查看資料表 →MC9S08QB4CTG
✅ 直接替換聯絡詢價
查看資料表 →MC9S08QA4CDNE
✅ 直接替換聯絡詢價
查看資料表 →MC9S08QG4CDNE
✅ 直接替換聯絡詢價
查看資料表 →MC9S08QE4CLC
✅ 直接替換聯絡詢價
查看資料表 →MC9S08QB4CWL 最大額定值與電氣特性
| Product Type | 8-bit HCS08 microcontroller |
| Maximum CPU Frequency | 20 MHz |
| Program Memory | 4 KB Flash (4K x 8) |
| 封裝 | 28-pin SOIC |
| Architecture | HCS08 |
| 工作溫度範圍 | -40 °C to +85 °C |
| Connectivity | I2C, LIN, SCI, and SPI |
| Keyboard Interface | Integrated |
| LED Drive Capability | High-current LED drivers |
| 安裝類型 | Surface mount |
MC9S08QB4CWL 28-pin soic 腳位配置指南
MC9S08QB4CWL（28-pin soic 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： MC9S08QB4CWL.
請參閱 資料表 以查看完整腳位配置。
典型應用
MC9S08QB4CWL 適用於 6 應用s: LED Control Panels, Keypad and Human-Interface Control, Low-Power Sensor and Actuator Nodes, Small Appliance Control, Industrial Control Module, Battery-Operated Embedded Module.
LED Control Panels
The MC9S08QB4CWL fits compact LED-control panels because its verified NXP features include high-current LED drivers, an 8-bit HCS08 CPU, and operation up to 20 MHz. The MCU can execute display or indicator-control firmware while coordinating peripheral functions in a single 28-pin SOIC device. Its 4 KB Flash capacity is appropriate for simple sequencing, debouncing, status logic, and local button-control routines. Design the output stage against the datasheet’s absolute maximum current and thermal limits, because those ratings were not included in the verified snippets. The End of Life status should be considered when creating a new production design.
推薦
Keypad and Human-Interface Control
The integrated keyboard-interface capability identified for the MC9S08QB4CWL makes it relevant to keypads, small consoles, and configurable control surfaces. Its 8-bit HCS08 processor at up to 20 MHz can manage scanning, debouncing, status LEDs, and simple user-interface logic, while the 4 KB Flash footprint supports compact firmware. The 28-pin SOIC package can simplify assembly where through-hole-style board servicing and automated surface-mount production are both useful. Before finalizing a design, verify the exact keyboard-interface pins, debounce resources, supply limits, and I/O electrical ratings from the manufacturer datasheet.
推薦
Low-Power Sensor and Actuator Nodes
The MC9S08QB4CWL is appropriate for small embedded nodes that read sensors and control actuators over serial interfaces. The verified component data lists I2C, LIN, SCI, and SPI connectivity, giving the firmware options for local sensors, remote modules, and simple industrial equipment. The 20 MHz HCS08 CPU provides more execution margin than a very low-clock-only controller, while the 4 KB Flash store can hold protocol and control routines. Because RAM, sleep currents, I/O levels, and timing limits were not provided in the verified data, validate those specifications before setting the power budget or selecting pull-ups and level-shift components.
推薦
Small Appliance Control
The MC9S08QB4CWL can serve as the controller in a small appliance where a local MCU must coordinate buttons, indicators, relays, or motors and respond through serial peripherals. The verified 20 MHz operating speed is suitable for straightforward real-time control loops, while the 4 KB Flash capacity favors compact application firmware rather than large graphical or networking workloads. Its 28-pin SOIC package supports conventional surface-mount assembly, but the designer must confirm the pin multiplexing and drive limits before assigning outputs. The device’s End of Life status makes it most appropriate for maintenance of an existing platform or a project where migration risk has been explicitly accepted.
推薦
Industrial Control Module
The MC9S08QB4CWL may be used in a compact industrial-control module when local logic, status handling, and serial communications are more important than high-end processing. The listed LIN and SCI connectivity can support communication with sensors, service interfaces, or neighboring controllers, while the HCS08 CPU and 4 KB Flash provide a simple real-time platform. Industrial suitability still depends on environmental and compliance requirements that are not supplied in the verified data, including EMC, temperature qualification, and transient tolerance. Treat the device as a legacy choice and validate its lifecycle, sourcing, and production continuity before starting a new industrial design.
推薦
Battery-Operated Embedded Module
The low-power MCU positioning of the MC9S08QB4CWL makes it a candidate for battery-operated modules with intermittent sensing, local processing, and serial communication. The MCU can manage a duty-cycled control routine and use I2C, LIN, SCI, or SPI depending on the selected peripheral pins. Its 4 KB Flash capacity is sufficient for many small embedded-control programs, while 20 MHz maximum clock performance allows responsive handling of active periods. The verified data does not state sleep-mode current, wake-up time, RAM, or supply voltage, so battery-life calculations require the official datasheet. Confirm those values before choosing external regulators, pull resistors, or level shifters.
推薦
推薦產品摘要
工程參考資料，適用於 MC9S08QB4CWL — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | MC9S08QE4CWJ | MC9S08QB4CTG | MC9S08QA4CDNE | MC9S08QG4CDNE | MC9S08QE4CLC |
|---|---|---|---|---|---|---|
| Package | 28-pin SOIC | 28-pin SOIC - candidate | 28-pin SOIC - candidate | 28-pin SOIC - candidate | 28-pin SOIC - candidate | 28-pin SOIC - candidate |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
主要差異化特點
- Verified legacy control feature set (對比MC9S08QE4CWJ)
- 28-pin SOIC package continuity (對比MC9S08QB4CTG)
- Defined low-temperature operating range (對比MC9S08QA4CDNE)
設計說明
Do not treat a same-package S08-family candidate as a true drop-in replacement without checking every pin. The verified data confirms the target’s 28-pin SOIC package but does not provide a complete pinout, supply-voltage range, RAM size, GPIO mapping, or absolute maximum ratings. Compare the manufacturer datasheets for pin multiplexing, oscillator requirements, reset behavior, peripheral assignments, and programming compatibility before modifying a PCB.
Use the manufacturer’s 28-pin SOIC land pattern and place required bypass capacitors close to the supply pins. Keep oscillator and reset traces short, maintain a quiet return path, and route communication lines away from switching regulators or relay drivers. Because the verified data does not specify pin locations or capacitor values, obtain those details from the official NXP datasheet rather than deriving them from generic S08 layouts.
The NXP product page identifies the MC9S08QB4CWL as End of Life, so a production design should include a sourcing review. Verify authorized-channel inventory, last-time-buy status, firmware and toolchain support, and a migration plan before committing new releases. For an existing installed base, preserve the original footprint and pin documentation until a replacement has passed electrical, timing, peripheral, and system-level validation.
合規資訊
The verified search data does not provide definitive RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statements for the target. Confirm current declarations with NXP or the authorized distributor.
