MC908JB12JDWE - 8-Bit 6MHz 12KB MCU | NXP | 20-SOIC
部品番号: MC908JB12JDWE ✗ 生産終了| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $3.2117 | $3.21 |
| 10 | $3.2117 | $32.12 |
| 100 | $3.2117 | $321.17 |
| 500 | $3.2117 | $1,605.85 |
| 1,000 | $3.2117 | $3,211.70 |
MC908JB12JDWE 概要
An 8-bit microcontroller is a compact embedded-processing component that executes firmware, reads inputs, controls outputs, and manages system timing. MC908JB12JDWE belongs to the HC08 family and uses a CISC-oriented architecture, while its 6 MHz operating speed provides a defined performance baseline for control logic. The 12K x 8 flash organization provides 12 KB of on-chip program storage and supports self-contained firmware in applications that do not require external memory.
The main verified characteristics are the 8-bit CPU, 6 MHz clock speed, 12 KB flash memory, 5 V supply, and 20-SOIC package. The 20-SOIC package is a surface-mount SOIC-20 package that is convenient for through-hole-compatible board assembly and automated manufacturing. The package footprint and pin arrangement must still be checked against the manufacturer datasheet before designing a replacement or alternative PCB.
MC908JB12JDWE is appropriate for small embedded controllers, including motor and relay-control systems, appliance controllers, simple industrial interfaces, sensor-conditioning systems, and legacy HC08 firmware platforms. Firmware timing, interrupt behavior, memory-map assumptions, and peripheral availability must be validated against the complete manufacturer documentation before production use.
A key design consideration is that this is an older HC08 device with a relatively small 12 KB flash budget. Developers should reserve memory for interrupt vectors, constants, calibration data, and future revisions, while using the recommended external clock and reset arrangements from the manufacturer documentation. Verify all timing, I/O, electrical limits, and package details against the official datasheet rather than relying only on distributor summaries.
This page consolidates verified distributor specifications, sourcing links, package information, application context, and replacement-search findings. The available search data does not provide enough verified information to claim a pin-compatible replacement, complete pinout, lifecycle guarantee, or every electrical timing parameter without consulting the manufacturer datasheet.
ドロップイン代替品: MC908JB12JDWE — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: MC908JB12JDWE （同一形状・フットプリント） — 相違点: Package, Architecture, Core, Manufacturer, Product Type.
クイック比較ツール — 並列比較する代替部品を選択:
MC908JK8MDWE
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MC908JK8CDWE
✅ ドロップイン✓ 在庫あり
$3.05 / 個
データシートを見る →MC908JK3EMDWER
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MC908QT1ACDWE
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MC908JL3ECDWE
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$6.0657 / 個
データシートを見る →MC908JB12JDWE 最大定格＆電気的特性
| Product Type | 8-bit CISC microcontroller |
| Architecture | HC08 |
| CPU Word Size | 8-bit |
| Clock Frequency | 6 MHz |
| Program Memory | 12 KB (12K x 8) flash |
| 電源電圧 | 5 V |
| パッケージ | 20-SOIC |
| Package Width | 7.50 mm |
| 実装タイプ | Surface mount |
| Manufacturer | NXP Semiconductors |
| Series | MC908JB |
| Core | HC08 8-bit MCU |
| Program Memory Type | Flash |
MC908JB12JDWE 7.50 mm ピン配置ガイド
MC908JB12JDWE (7.50 mm パッケージ) のピン配置。 このデジタルICには、GPIO、通信インターフェース (UART、SPI、I2C)、および電源ピンが含まれています。代替ピン機能と設定オプションについては、メーカーのデータシートを参照してください。組み込みシステム設計とPCBレイアウトに不可欠です。
詳細なピン配置データはありません: MC908JB12JDWE.
詳細は データシート をご参照ください。
主な用途
MC908JB12JDWE の用途: 6 件s: Appliance Control, Simple Industrial Interface, Relay and Motor Sequencing, Sensor Conditioning and Data Acquisition, Legacy HC08 Firmware Platform, Battery-Powered Auxiliary Controller.
Appliance Control
MC908JB12JDWE fits appliance-control boards that coordinate buttons, indicators, relays, motors, and safety-related discrete logic. Its 8-bit HC08 core and 6 MHz clock provide a straightforward platform for fixed control sequences, while 12 KB of flash can hold a compact application when the firmware remains within that budget. A 5 V supply matches many legacy appliance boards, but the designer must verify every input level, output-driver rating, timing assumption, and reset behavior in the official datasheet. The MCU should be placed where its grounded return path and decoupling remain close to the PCB power network. The principal benefit is integrated flash and a simple control architecture; the principal limitation is that complex user interfaces or extensive diagnostics may exceed the available program space.
おすすめ
Simple Industrial Interface
The MC908JB12JDWE can serve as the local controller for a compact industrial interface that reads switches, encodes commands, drives indicators, and manages discrete outputs. Its 6 MHz operating speed is appropriate for deterministic low-bandwidth control tasks, and the 12 KB flash capacity favors standalone firmware rather than external program-memory designs. For industrial equipment, the design must still account for electrical isolation, surge exposure, grounding, and the difference between a consumer MCU package and a formally qualified industrial part. The supplied evidence identifies a 5 V MCU but does not provide temperature, EMC, ESD, or lifecycle ratings. Engineers should therefore verify the complete electrical and environmental requirements before using the part in machinery or process-control equipment.
おすすめ
Relay and Motor Sequencing
For relay banks, small motors, lamps, and sequencing modules, MC908JB12JDWE provides an 8-bit processor with integrated flash and a defined 6 MHz clock. Firmware can implement debouncing, interlocks, timing sequences, fault flags, and controlled output transitions, subject to the MCU's documented I/O ratings. External driver transistors, flyback protection, current limiting, and isolation may be required because the MCU is a logic controller rather than a power device. The 12 KB flash budget limits the amount of diagnostics and configuration storage that can be included, so fixed-function designs should plan memory carefully. A key engineering trade-off is that software sequencing can simplify hardware but must be checked against worst-case interrupt latency and timing requirements.
おすすめ
Sensor Conditioning and Data Acquisition
MC908JB12JDWE can supervise simple sensor-conditioning boards when the system requires digital filtering, thresholding, status reporting, and local actuation. The 8-bit architecture is suitable for low-data-rate measurement paths, while the integrated 12 KB flash removes the need for an external program-memory device for compact firmware. However, the verified data does not identify ADC resolution, analog inputs, sensor interfaces, or sampling timers, so analog suitability cannot be inferred from the CPU frequency alone. The system designer must confirm whether the selected MC908JB12 variant contains the required peripherals and whether its 5 V electrical limits suit the sensor network. External signal conditioning and protection may be necessary before presenting sensor signals to the MCU.
おすすめ
Legacy HC08 Firmware Platform
MC908JB12JDWE is particularly relevant when maintaining or cloning an existing HC08-based product where the design uses the MC908JB12 family, 20-SOIC assembly, and 5 V control logic. A familiar architecture can reduce the engineering effort of preserving firmware structure, startup behavior, interrupt handling, and board-level service procedures. The migration decision still requires a complete pinout, memory-map, peripheral, and electrical comparison; matching package names alone does not prove drop-in compatibility. For production continuity, engineers should archive the original firmware toolchain, confirm the current manufacturer documentation, and validate a hardware sample under worst-case voltage, temperature, reset, and I/O conditions before releasing a replacement.
おすすめ
Battery-Powered Auxiliary Controller
The MCU may be used as a low-duty-cycle auxiliary controller in battery-powered equipment when standby behavior and low-power operation have been verified in the official documentation. The 8-bit core can handle wake-up logic, sensor polling, state flags, and communication between higher-level system functions, while the integrated flash simplifies firmware deployment. The verified data does not provide sleep current, active current, wake-up time, or regulator requirements, so battery-life claims cannot be made from the available evidence. Designers should calculate average current from the measured duty cycle and confirm whether the 5 V operating point matches the battery-management architecture. The 12 KB memory limit may also make periodic logging or graph storage impractical.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: MC908JB12JDWE — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | MC908JK8MDWE | MC908JK8CDWE | MC908JK3EMDWER | MC908QT1ACDWE | MC908JL3ECDWE |
|---|---|---|---|---|---|---|
| Package | 20-SOIC | 20-SOIC family candidate; exact footprint verification required | 20-SOIC family candidate; exact footprint verification required | 20-SOIC family candidate; exact footprint verification required | 20-SOIC family candidate; exact footprint verification required | 20-SOIC family candidate; exact footprint verification required |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Verified Replacement Status | Target MPN | Comparison candidate only; not manufacturer-confirmed drop-in | Comparison candidate only; not manufacturer-confirmed drop-in | Comparison candidate only; not manufacturer-confirmed drop-in | Comparison candidate only; not manufacturer-confirmed drop-in | LLM-listed same-brand family candidate; not independently verified |
主な差別化要因
- Verified 12 KB flash allocation （vs MC908JK8MDWE)
- Defined 6 MHz operating point （vs MC908JK8CDWE)
- 5 V device identification （vs MC908QT1ACDWE)
- Compact 20-SOIC integration （vs MC908JL3ECDWE)
設計ノート
The verified data identifies a 5 V MCU, but it does not provide the permitted supply tolerance or current limits. Confirm the exact operating-voltage range and absolute maximum ratings in the manufacturer datasheet, then place local bypass capacitors at the power pins according to the recommended layout. Do not use the distributor's 5 V summary as a substitute for the complete power specification.
Use the official 20-SOIC package drawing and land pattern rather than deriving the footprint from the 7.50 mm width alone. Confirm pin numbering, orientation, lead pitch, solder-mask clearance, and assembly tolerances before releasing artwork. The verified package is 20-SOIC, but the supplied data does not include a complete pinout or mechanical drawing.
A same-package candidate is not automatically a drop-in replacement. Compare reset behavior, clock requirements, memory organization, interrupt vectors, peripheral registers, I/O levels, timing, and absolute maximum ratings before changing the MPN. The supplied cross-reference pages identify comparison candidates but do not establish manufacturer-approved replacement compatibility.
Keep the MCU power return path short and place decoupling close to the relevant supply pins. Route clock and programming signals away from noisy switching nodes, preserve the manufacturer's recommended programming connector access, and provide defined levels for unused inputs. The verified data does not specify the pin functions, so these layout actions must be checked against the official pinout.
コンプライアンス情報
The supplied verified data does not include RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive qualification information. No compliance claim is inferred from the distributor listings.