MC9S08QB4CGK - 8-Bit 20MHz MCU 4KB Flash | NXP | QFN-24
MPN: MC9S08QB4CGK ✗ انتهى عمره الإنتاجيMC9S08QB4CGK نظرة عامة
An MCU, or microcontroller, is a single-chip embedded controller containing a CPU, program memory, data memory, and peripherals for controlling a specific product. The S08 core belongs to the 8-bit microcontroller hierarchy within the broader semiconductor and embedded-processing market. It is commonly used in simple appliances, sensors, motor controls, access equipment, and consumer products where control logic, communication, and analog or digital interfaces must share one economical platform.
The MC9S08QB4CGK combines 20 MHz processing performance with 4KB of flash and 256 bytes of RAM. Its S08 instruction set and integrated microcontroller resources make it suitable for compact control loops, button and switch handling, display or indicator control, and simple peripheral interfacing. The 1.8 V operating supply supports low-voltage embedded systems and helps reduce the power budget in battery-operated designs when the application uses the MCU's low-power operating modes appropriately.
The 24-HVQFN package is intended for surface-mount PCB assembly and provides a compact solution for space-constrained products. Because the package is very small, PCB layout should provide adequate thermal spreading and manufacturing clearance. The exposed pad, if present in the package drawing, should be connected according to the manufacturer's land-pattern and thermal guidance rather than treated as an optional mechanical feature.
Typical applications include consumer appliances, small motor-control boards, building and access equipment, simple sensor nodes, programmable controllers, and compact user-interface modules. In these systems, the 4KB flash program area limits application code size, while the 20 MHz CPU supports responsive sequential control and peripheral service routines.
The most important design consideration is confirming that the controller's memory size, operating voltage, clock requirements, peripheral set, and package footprint match the intended design. A software replacement should not be assumed to be electrically or pin compatible merely because it uses the S08 family. Validate the pin description table, programming configuration, clock setup, and reset behavior against the manufacturer documentation before committing to a redesign.
This page combines manufacturer product information, verified distributor listings, family-level cross-reference information, and practical selection guidance. It also identifies the limits of direct substitution for an end-of-life MCU so engineers can distinguish a PCB-compatible choice from a merely related S08 device.
بدائل مباشرة لـ MC9S08QB4CGK — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
MC9S08QB7CGK
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
MC9S08QB8CGK
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
MC9S08QB9CGK
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
MC9S08QB4CGK الحدود القصوى والخصائص الكهربائية
| Product Type | 8-bit microcontroller (MCU) |
| Processor Core | S08 8-bit HCS08 CPU |
| Maximum CPU Frequency | 20 MHz |
| Program Memory | 4KB flash |
| RAM | 256 bytes |
| جهد التغذية التشغيلي | 1.8 V |
| Instruction Set | HC08 instruction set with BGND extension |
| العلبة | 24-HVQFN (5 mm x 5 mm) |
| عدد الأطراف | 24 pins |
| نوع التركيب | Surface mount |
| Flash Organization | 4K x 8 bits |
| Data Bus Architecture | 8-bit |
| Operating Mode | Low-power MCU application |
| Shipping Package | Tray |
دليل تكوين أطراف MC9S08QB4CGK tray
تكوين الأطراف لـ MC9S08QB4CGK (حزمة tray). تتضمن هذه الدائرة المتكاملة الرقمية GPIO وواجهات الاتصال (UART وSPI وI2C) وأطراف الطاقة. راجع ورقة بيانات الشركة المصنعة لوظائف الأطراف البديلة وخيارات التكوين. ضرورية لتصميم الأنظمة المدمجة وتخطيط PCB.
لا تتوفر بيانات مفصلة لمخطط التوصيلات لـ MC9S08QB4CGK.
راجع ورقة البيانات للحصول على تكوين الأطراف الكامل.
التطبيقات النموذجية
MC9S08QB4CGK مناسب لـ 6 التطبيقs: Compact Consumer Appliance Control, Small Motor and Relay Control, Access and Security Equipment, Simple Sensor and Conditioning Node, Programmable Logic Controller, Low-Power User Interface Module.
Compact Consumer Appliance Control
The MC9S08QB4CGK fits compact appliances that need local sequencing, user inputs, indicators, and basic actuator control without a high-performance processor. Its 20 MHz S08 CPU provides adequate execution speed for deterministic control loops, while 4KB of flash holds a focused firmware image and 256 bytes of RAM supports short working-data requirements. The 1.8 V supply can simplify low-voltage power architecture. The main constraint is program space: applications requiring larger display tables, communications stacks, or extensive diagnostics should evaluate a higher-memory MCU before finalizing the design.
موصى به
Small Motor and Relay Control
MC9S08QB4CGK can serve as the supervisory controller in a small motor or relay system where the firmware handles button input, timed sequences, interlocks, and status feedback. The 20 MHz core is suitable for responsive service of digital I/O and simple control logic, while the 24-HVQFN package preserves board area. Designers should place switching drivers and protection components away from the MCU and provide clean local bypassing. Because the device has only 4KB of flash and 256 bytes of RAM, complex motion algorithms or extensive logging should be placed in a companion processor.
موصى به
Access and Security Equipment
The MC9S08QB4CGK is suitable for keypad readers, simple access controllers, and security modules that coordinate inputs, lock commands, indicators, and low-speed communication. Its S08 8-bit core handles sequential embedded logic efficiently, and the 20 MHz clock allows responsive debouncing and state-machine updates. The 1.8 V operating supply supports compact low-voltage designs. Firmware should be reviewed for timing margin, and the 4KB flash limit means security-heavy features should be implemented without assuming the capacity of a larger MCU.
موصى به
Simple Sensor and Conditioning Node
MC9S08QB4CGK can supervise a compact sensing node that samples switches or simple transducers, applies thresholds, and forwards status through a serial interface. The 20 MHz S08 processor is fast enough for repeated acquisition and filtering routines, while 4KB of flash can hold a focused acquisition and communications program. Its 256 bytes of RAM imposes a practical limit on buffering, so streaming applications should avoid unnecessary sample storage. A low-noise 1.8 V rail and careful decoupling improve measurement repeatability around the MCU.
موصى به
Programmable Logic Controller
MC9S08QB4CGK supports small programmable controller tasks such as sequencing discrete inputs, driving relay outputs, implementing timers, and maintaining operating-state logic. The 8-bit S08 core and 20 MHz performance match the control-oriented nature of these products, and the 24-HVQFN package allows a compact controller board. Firmware structure should include deterministic timing and safe output states during reset or faults. Because code memory is limited to 4KB, elaborate protocols and graphical configuration data are better handled by a larger companion MCU.
موصى به
Low-Power User Interface Module
MC9S08QB4CGK can manage a small local user interface containing buttons, LEDs, buzzers, and a simple display. Its 20 MHz processor provides enough responsiveness for debouncing, menu-state logic, and display updates, while the 1.8 V supply and small 24-HVQFN package suit embedded modules. The 4KB flash budget is suitable only when display content and interface code remain compact; extensive graphics should use a separate display controller. Firmware should define default LED and buzzer states so that reset conditions do not create unintended outputs.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ MC9S08QB4CGK — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | MC9S08QB7CGK | MC9S08QB8CGK | MC9S08QB9CGK |
|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 24-HVQFN (5 mm x 5 mm) | 24-HVQFN (5 mm x 5 mm) | 24-HVQFN (5 mm x 5 mm) | 24-HVQFN (5 mm x 5 mm) |
| Processor Core | S08 8-bit HCS08 CPU | S08 family | S08 family | S08 family |
| Maximum CPU Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Flash Memory | 4KB | 7KB | 8KB | 9KB |
| Instruction Set | HC08 instruction set with BGND extension | HC08 family instruction set | HC08 family instruction set | HC08 family instruction set |
أبرز الفروقات
- Lower flash requirement for firmware-compatible family alternatives (مقابلMC9S08QB8CGK)
- Defined 1.8 V operating point for low-voltage designs (مقابلMC9S08QB7CGK)
- Compact 24-HVQFN implementation (مقابلMC9S08QB9CGK)
ملاحظات التصميم
Use the manufacturer's 24-HVQFN land pattern and exposed-pad connection exactly as shown in the package drawing. A 5 mm by 5 mm QFN footprint leaves little room for routing errors, so verify pad dimensions, solder-mask clearance, and paste volume during PCB assembly. Keep the MCU ground and supply connections short and provide local bypass capacitance close to the relevant pins.
Design the 1.8 V rail so its voltage, startup sequence, and noise remain within the electrical limits stated in the manufacturer technical data sheet. Place the required input capacitors directly beside the supply and ground pins rather than at the connector or regulator. Confirm the final rail behavior under startup, reset, and worst-case I/O transitions because peripheral activity can disturb a low-voltage supply.
Do not treat every S08 member as a pin-compatible substitute. MC9S08QB7CGK, MC9S08QB8CGK, and MC9S08QB9CGK share the QB family and CGK package designation, but their flash capacities differ by 3KB, 4KB, and 5KB from the 4KB MC9S08QB4CGK. Check the pin table, peripheral mapping, clock requirements, and application code size before approving a substitution.
Separate fast switching signals and inductive-driver nodes from sensitive reset, clock, and analog-adjacent inputs. Route reset with a short path to the MCU and keep programming or debug interfaces away from high-current switching paths. Although the device is a digital MCU, grounding and return-current discipline remain important because a compact QFN package can couple switching noise into nearby signal routing.
معلومات الامتثال
The manufacturer product page confirms end-of-life status but the accessible product information does not state the requested compliance details. These fields remain unknown rather than inferred.
