MC9S12A256CFUE - 16-bit 25MHz 256KB Flash MCU | NXP
部品番号: MC9S12A256CFUE ✗ 生産終了| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $50.86 | $50.86 |
| 10 | $50.1 | $501.00 |
| 100 | $49.2 | $4,920.00 |
| 500 | $48.4 | $24,200.00 |
| 1,000 | $47.08 | $47,080.00 |
MC9S12A256CFUE 概要
An HCS12 MCU is a member of the 16-bit microcontroller family: microcontroller -> embedded processor -> semiconductor. The HCS12 (S12) architecture evolved from the Freescale (formerly Motorola) HC12 and 68HC11 lineages, providing full 16-bit data paths with a CISC instruction set that eases migration from legacy 8-bit designs. According to NXP's product page, the S12A family integrates a system integration module (SIM) that manages system resource mapping, clock generation, interrupt control, and bus interfacing.
Key features include 256 KB of Flash program memory for demanding application code, 25 MHz bus operation for real-time control, and a rich peripheral set typical of the S12A family: asynchronous serial interfaces (SCI), serial peripheral interface (SPI), an 8-channel 10-bit ADC, timer/PWM modules, and a CAN 2.0A/B controller for automotive networking. The 80-QFP 14x14 mm footprint supports hand assembly and automated reflow, and the wide industrial temperature range suits harsh environments.
Architecturally, the HCS12 CPU executes variable-length instructions with indexed addressing and background debug mode (BDM) via a single-wire interface, simplifying in-system flash programming and field diagnostics. The phase-locked loop (PLL) clock generator allows the bus frequency to be tuned from a low-cost crystal while minimizing EMI.
Typical applications include automotive body and comfort modules (door control, seat control, lighting), industrial control panels, HVAC controllers, motor control interfaces, and instrumentation requiring CAN connectivity.
Design consideration: the device is NRND (Not Recommended for New Designs) per NXP, so new designs should evaluate the pin-compatible S12G or S12P families, or use this part only for sustaining existing production.
This page synthesizes distributor pricing, same-family drop-in alternatives, lifecycle status, and practical design guidance not found in a single manufacturer datasheet.
ドロップイン代替品: MC9S12A256CFUE — 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: MC9S12A256CFUE （同一形状・フットプリント） — 相違点: Package, Core, Supply Voltage, Operating Temperature, ADC.
クイック比較ツール — 並列比較する代替部品を選択:
MC9S12A256BCFU
✅ ドロップイン✓ 在庫あり
$18.2 / 個
データシートを見る →MC9S12A512CFU
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
MC9S12A128CFUE
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
MC9S12A256CFV
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
MC9S12A256MFUE
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
MC9S12A256CFUE 最大定格＆電気的特性
| Core Architecture | HCS12 16-bit CISC |
| Bus Frequency | 25 MHz |
| Flash Memory | 256 KB (256K x 8) |
| 電源電圧 | 2.5 V / 5 V (per Arrow listing) |
| パッケージ | 80-QFP (14x14 mm) |
| 実装タイプ | Surface Mount |
| 動作温度 | -40C to +85C |
| Application Segment | Automotive (per Arrow listing) |
| Core Series | S12A (Barracuda, MOS13 per Mouser) |
| ADC Resolution | 10-bit |
| データバス幅 | 16-bit |
| Programming Interface | BDM (Background Debug Mode) |
MC9S12A256CFUE 80-qfp (14x14 mm) ピン配置ガイド
MC9S12A256CFUE (80-qfp (14x14 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: MC9S12A256CFUE.
詳細は データシート をご参照ください。
主な用途
MC9S12A256CFUE の用途: 6 件s: Automotive Body Control Modules, Industrial Control Panels and PLC I/O, HVAC and Building Automation Controllers, DC Motor Control and Actuator Drivers, Instrumentation and Test Equipment, Agricultural and Off-Highway Vehicle Electronics.
Automotive Body Control Modules
The MC9S12A256CFUE fits automotive body control modules (BCMs) because its 25 MHz HCS12 core, 256 KB Flash, and integrated CAN 2.0 controller cover the classic requirements of door, seat, lighting, and keyless-entry electronics. The 10-bit ADC reads switch matrices, potentiometer position sensors, and thermistor inputs, while PWM timer channels drive lamp loads, relays, and DC motor drivers directly. Its -40C to +85C operating range matches under-dash and engine-bay-adjacent environments, and the Arrow listing explicitly identifies this part as automotive segment. In a BCM, the MCU typically polls LIN or CAN network frames, executes load diagnostics (open-load and short-circuit detection via the ADC), and manages sleep/wake states to meet quiescent-current budgets. Because the part is NRND, use it for sustaining existing module production rather than new automotive platforms.
おすすめ
Industrial Control Panels and PLC I/O
In industrial control panels, the MC9S12A256CFUE serves as a main controller or intelligent I/O node where 16-bit arithmetic, 256 KB of program Flash, and multiple serial interfaces simplify sequencing, interlock logic, and MODBUS-style protocols over SCI or SPI. The 25 MHz bus executes real-time loop control comfortably, and the 10-bit ADC digitizes 4-20 mA current-loop signals or potentiometer setpoints after external conditioning. The 80-QFP 14x14 mm package is large enough for reliable rework in low-volume panel building, an advantage over fine-pitch BGAs. The BDM interface allows field firmware updates with a simple debug connector. Designers should note the 5 V I/O rails integrate naturally with legacy industrial 5 V logic and opto-isolator front ends, reducing level-shifting circuitry compared with 3.3 V MCUs.
おすすめ
HVAC and Building Automation Controllers
Building automation and HVAC controllers benefit from the MC9S12A256CFUE's combination of on-chip Flash, CAN/SCI communication, and PWM outputs for damper motors, valve actuators, and multi-speed fan control. The 256 KB Flash accommodates scheduling algorithms, PID control loops, and a communication protocol stack (for example BACnet-over-CAN or proprietary RS-485 framing on the SCI) with room for data logging in the external EEPROM or Flash headroom. The 10-bit ADC reads NTC thermistors, humidity sensors, and pressure transducers, while timer channels generate servo-compatible pulse trains for zone dampers. Its -40C to +85C rating suits rooftop units and mechanical rooms. The single-wire BDM port enables factory programming and service-tool diagnostics on the production line and in the field, shortening commissioning time.
おすすめ
DC Motor Control and Actuator Drivers
The MC9S12A256CFUE is well suited to brushed-DC and stepper motor control nodes because the S12A timer module provides multiple PWM channels with programmable period and duty resolution, sufficient for closed-loop current and speed control at 25 MHz bus rates. The 10-bit ADC samples shunt-resistor current feedback and back-EMF for sensorless estimation, and the 16-bit core executes PI loops with cycle-level determinism unencumbered by cache effects. The 5 V I/O drives gate-driver inputs directly, and the automotive rating fits power-window, seat-adjust, and pump actuators. Firmware including commutation tables, ramp profiles, and fault handling fits comfortably in 256 KB Flash. Designers should allocate timer channels carefully and verify PWM frequency versus ADC conversion time in the NXP reference manual for the specific die revision.
おすすめ
Instrumentation and Test Equipment
Bench and portable instrumentation uses the MC9S12A256CFUE as a front-panel and acquisition controller: the SCI connects to a PC or display module, SPI clocks external high-precision ADCs, and the on-chip 10-bit ADC handles fast auxiliary channels. The 256 KB Flash holds a command interpreter, calibration tables, and scaling routines, while the 16-bit core performs fixed-point math for unit conversion without floating-point coprocessor overhead. The 80-QFP footprint with generous 0.5 mm-class lead pitch permits hand soldering and probing, valuable in instrument prototypes and service. BDM debugging shortens firmware iteration. For measurement channels demanding better than 10-bit resolution, pair the MCU with an external precision converter on the SPI bus; the on-chip ADC then covers housekeeping signals such as supply and temperature monitoring.
おすすめ
Agricultural and Off-Highway Vehicle Electronics
Off-highway and agricultural equipment controllers mirror automotive body modules: the MC9S12A256CFUE's CAN controller joins implement buses, its PWM and GPIO channels drive valve solenoids, lamps, and hydraulic actuators, and the 10-bit ADC reads lever positions, pressure sensors, and speed pickups. The -40C to +85C range and 5 V noise-tolerant I/O withstand engine-bay and harness transients typical of tractors, harvesters, and construction machines, while 256 KB Flash stores rate-control logic and fault logging. The 25 MHz bus leaves margin for diagnostic scheduling alongside real-time control. Because legacy equipment platforms frequently standardized on the S12 family, this part sustains service parts for existing fleets; new off-highway platforms should instead start from NXP's currently recommended S12G devices to avoid inheriting NRND lifecycle risk.
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: MC9S12A256CFUE — 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 | MC9S12A256BCFU | MC9S12A512CFU | MC9S12A128CFUE | MC9S12A256CFV |
|---|---|---|---|---|---|
| Package | 80-QFP (14x14 mm) | 80-QFP (14x14 mm) - same | 80-QFP - same footprint | 80-QFP - same footprint | 80-QFP - same footprint |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core | HCS12 16-bit CISC | HCS12 16-bit CISC | HCS12 16-bit CISC | HCS12 16-bit CISC | HCS12 16-bit CISC |
| Bus Frequency | 25 MHz | 25 MHz | 25 MHz | 25 MHz | 25 MHz |
| Flash Memory | 256 KB | 256 KB | 512 KB | 128 KB | 256 KB |
| Lifecycle Status | NRND | NRND (verify current status) | NRND (verify current status) | NRND (verify current status) | NRND (verify current status) |
| ADC Resolution | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit |
主な差別化要因
- Double the Flash of the smaller family variant （vs MC9S12A128CFUE)
- Cost-optimized versus the memory-upgrade part （vs MC9S12A512CFU)
- Fresh die revision versus the B-stepping variant （vs MC9S12A256BCFU)
設計ノート
The MC9S12A256CFUE is NRND per the official NXP product page. Do not start new designs with this part: plan migration to the S12G or S12P families for new platforms, or secure a last-time-buy quantity for sustaining existing products. Open-market stock (22,956 pieces listed by Heisener as of 2026-10-18) is finite and NRND parts attract counterfeit risk, so purchase only from authorized distributors or traceable-lot brokers with incoming inspection.
The S12A family runs from a 5 V rail per the Arrow listing (2.5 V/5 V options); decouple VDDX/VSS pairs with 100 nF ceramic capacitors placed within a few millimeters of each supply pin pair, plus bulk 10 uF near the regulator output. Follow the power-up sequencing and BDM-connect constraints in the NXP reference manual to avoid placing the MCU into an unintended security state on first flash programming.
The 80-QFP 14x14 mm footprint needs about 18x18 mm of board area including fan-out. Use 0.5 mm-pitch-standard QFP land patterns per IPC-7351 conventions, place the PLL loop filter components close to the XFC pins exactly as the reference-manual circuit shows, and keep the crystal traces short and guarded. Reserve the BDM connector (6-pin or 10-pin footprint) on production boards for in-system flash programming and field diagnostics - retrofitting debug access later is painful.
When the PLL is configured for the full 25 MHz bus, route clock-dependent outputs (PWM, timer, SPI SCK) away from the analog front end of the 10-bit ADC; ground-guard the ADC reference input and use a quiet, filtered VDDA/VSSA supply. In CAN networks, match the transceiver (for example a 5 V TJA1050-class part) to the 5 V MCU I/O and terminate the bus at both ends with 120 ohm.
コンプライアンス情報
NXP product page lists Environmental Quality documentation for this part; specific RoHS/REACH status should be confirmed from the NXP environmental compliance page. The 'E' temperature/suffix convention in HCS12 ordering codes commonly indicates lead-free/RoHS-compliant packaging, but this must be verified against the official NXP datasheet rather than assumed.