MC9S12XDT256CAA - 16-bit 80MHz 256KB Flash MCU | NXP
部品番号: MC9S12XDT256CAA ✗ 生産終了| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $13.54 | $13.54 |
| 10 | $12.86 | $128.60 |
| 100 | $12.18 | $1,218.00 |
| 500 | $11.5 | $5,750.00 |
| 1,000 | $10.83 | $10,830.00 |
MC9S12XDT256CAA 概要
A 16-bit microcontroller is an embedded processor whose internal data path, registers, and instruction handling operate on 16-bit words, placing it above 8-bit MCUs in arithmetic throughput while remaining far simpler than 32-bit parts. Within the power management and embedded control hierarchy, the MC9S12X family belongs to the HCS12X architecture, which is upward compatible with the widely deployed HCS12 instruction set, so interrupt stacking and the programmer's model remain identical to HCS12 while adding an instruction queue, enhanced indexed addressing, and an enhanced instruction set.
Key features include the 16-bit HCS12X CISC CPU, 256KB on-chip Flash for code storage, industrial temperature operation from -40C to +85C, and a wide 2.35V to 5.5V operating supply per distributor listings, with a 10-bit ADC for analog sensing. The 80-QFP 14x14 mm gull-wing package supports standard surface-mount assembly.
Technically, the S12XD series integrates the XGATE co-processor concept family heritage and peripheral set typical of automotive-grade 16-bit MCUs; per NXP, the MC9S12XDT256CAA is an S12XD 16-bit MCU with HCS12X core, 256KB Flash, 80MHz, QFP 80. Note that NXP currently lists this part as NRND (Not Recommended for New Designs), so new projects should evaluate the newer S12XE or MagniV alternatives.
Typical applications include body control modules, instrument clusters, industrial control systems, motor control, and legacy automotive networking nodes that rely on the HCS12X ecosystem and its CAN/LIN peripherals.
A key design consideration: since the device is NRND, any new PCB design should verify long-term supply or select an active family member with the same 80-QFP footprint.
This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet.
ドロップイン代替品: MC9S12XDT256CAA — 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: MC9S12XDT256CAA （同一形状・フットプリント） — 相違点: Operating Temperature, Package, Core Processor, ADC, Program Memory Size.
クイック比較ツール — 並列比較する代替部品を選択:
MC9S12XDT256CAG
✅ ドロップイン✓ 在庫あり
$17.4 / 個
データシートを見る →MC9S12XDT256MAA
✅ ドロップイン✓ 在庫あり
価格はお問い合わせください
データシートを見る →MC9S12XD256CAA
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MC9S12XDT512CAA
✅ ドロップイン✓ 在庫あり
$16.4 / 個
データシートを見る →MC9S12XDT512MAA
✅ ドロップイン✓ 在庫あり
価格はお問い合わせください
データシートを見る →MC9S12XDG128CAA
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MC9S12XDT256CAA 最大定格＆電気的特性
| Core Processor | HCS12X (S12XD) |
| Core Size | 16-Bit |
| Speed | 80 MHz |
| Flash Memory | 256KB (256K x 8) |
| Number of I/O | 59 |
| Supply Voltage (Vdd) | 2.35 V to 5.5 V (per distributor listing) |
| Data Converters | A/D 10-bit |
| 動作温度 | -40C to +85C (TA) |
| パッケージ / ケース | 80-QFP (14x14 mm) |
| Supplier Device Package | 80-QFP (14x14) |
| 実装タイプ | Surface Mount |
| Terminal Form | Gull Wing |
| Package Shape | Square (QFP) |
| Packaging Method | Tray |
| Series | HCS12X / S12XD Family (MC9S12XDT256) |
| Temperature Grade | Industrial |
| Lifecycle Status (NXP) | NRND (Not Recommended for New Designs) |
MC9S12XDT256CAA square (qfp) ピン配置ガイド
MC9S12XDT256CAA (square (qfp) 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: MC9S12XDT256CAA.
詳細は データシート をご参照ください。
主な用途
MC9S12XDT256CAA の用途: 6 件s: Automotive Body Control Modules, Instrument Clusters, Industrial Motor Control, Industrial Automation and PLC I/O, CAN/LIN Network Nodes and Gateways, Legacy Embedded System Maintenance.
Automotive Body Control Modules
The MC9S12XDT256CAA fits automotive body electronics because the S12XD family combines a 16-bit HCS12X core at up to 80MHz with 59 I/O lines and a 10-bit ADC, which is exactly the peripheral mix needed for lamp control, wiper logic, seat positioning, and switch debouncing. Its 256KB Flash accommodates diagnostics stacks and CAN/LIN communication layers without external memory. In a typical BCM, the MCU polls switches via the ADC and GPIO, drives loads through high-side drivers, and exchanges status on the CAN bus; the HCS12X enhanced instruction set and interrupt stacking inherited from HCS12 keep legacy firmware portable. The -40C to +85C industrial/automotive temperature range supports under-dash environments, and the wide 2.35V-5.5V supply per distributor data simplifies load-dump-protected 5V rails. Trade-off: as an NRND part it suits maintenance builds, not new platforms.
おすすめ
Instrument Clusters
Instrument clusters benefit from the MC9S12XDT256CAA's combination of a 10-bit ADC for fuel-level and temperature sensing, 59 I/O for stepper-motor gauge driving and indicator lamps, and 256KB Flash for the cluster's state machine and CAN/LIN diagnostics. The 80MHz S12XD core has ample headroom to refresh multiple stepper gauges, service the CAN stack, and run backlight dimming timers simultaneously, while the HCS12X instruction queue and enhanced indexed addressing accelerate table-driven gauge calibration curves. The wide 2.35V-5.5V supply tolerance per distributor data rides through cold-crank voltage dips, and the -40C to +85C range covers cabin exposure. Clusters are typically long-lifetime platforms, so the NRND status mainly affects future redesigns: existing cluster programs can keep qualifying this exact MPN, while new cluster platforms should migrate to the actively supported S12XE or MagniV families.
おすすめ
Industrial Motor Control
In industrial motor control, the MC9S12XDT256CAA provides the real-time responsiveness needed for PWM generation and closed-loop speed regulation: the 16-bit HCS12X core at 80MHz executes control loops with deterministic interrupt latency, while the 10-bit ADC samples current and voltage feedback for PI-loop computation. With 59 I/O lines, one MCU can drive a three-phase inverter gate interface, read encoder inputs, and manage fault interlocks. The 256KB Flash holds control firmware plus Modbus/CAN fieldbus stacks common on factory floors, and the -40C to +85C industrial temperature grade matches panel-mounted drive environments. Designers value the HCS12X ecosystem's mature CodeWarrior toolchain and abundant application notes for motor control. The main limitation versus modern parts is peripheral sophistication (no hardware FOC accelerators), so this MPN best serves brushed-DC, stepper, and simpler BLDC topologies in maintenance and legacy drive platforms.
おすすめ
Industrial Automation and PLC I/O
The MC9S12XDT256CAA serves distributed I/O and small PLC modules where 16-bit processing is sufficient and 5V tolerance simplifies interfacing with industrial sensors. Its 59 GPIO lines and 10-bit ADC allow direct connection to proximity switches, potentiometers, and 0-10V conditioned signals through front-end dividers, while the 256KB Flash stores protocol stacks (Modbus RTU/CANopen) alongside application logic. The -40C to +85C temperature range and gull-wing 80-QFP package suit DIN-rail and cabinet-mounted boards assembled with standard SMT processes. The HCS12X architecture's identical programmer model to HCS12 means decades of proven industrial firmware can be ported with minimal rework, a decisive advantage when requalifying certified automation equipment. Because the part is NRND per NXP, automation vendors should stock buffer quantities for long service commitments and plan migration to the S12XE family (e.g., S912XET512) for future hardware revisions.
おすすめ
CAN/LIN Network Nodes and Gateways
As a network node controller, the MC9S12XDT256CAA leverages the S12XD family's serial communication peripherals to bridge CAN and LIN subnetworks in vehicles and industrial equipment. The 80MHz HCS12X core handles message filtering, gateway routing, and UDS diagnostics with predictable timing, while 256KB Flash accommodates protocol stacks plus calibration data. The wide 2.35V-5.5V operating supply per distributor data matches both 3.3V and 5V transceiver rails, reducing level-shifting complexity on mixed-voltage boards, and the 14x14 mm 80-QFP keeps node PCB area compact. Firmware portability from HCS12 predecessors shortens validation cycles for existing certified networks. Note the NRND caveat: for new gateway designs select an active S12XE part with the same architectural DNA, but for sustaining deployed fleets, this MPN remains fully supported by NXP documentation and third-party toolchains.
おすすめ
Legacy Embedded System Maintenance
A primary ongoing role of the MC9S12XDT256CAA is sustaining legacy embedded platforms - medical lab equipment, test fixtures, agricultural controllers, and access systems - originally designed around the S12XD family. Because the HCS12X programmer's model and interrupt stacking are identical to HCS12 per the datasheet, engineering teams can patch firmware, add features, or replace failed units without requalifying the hardware design. The fixed 80-QFP (14x14 mm) footprint means board respins are unnecessary when substituting same-package family members such as the 512KB MC9S12XDT512 variants for firmware growth. For these programs, sourcing strategy matters more than specifications: distributors including DigiKey, Mouser, LCSC, and Rochester Electronics list the part, but NRND status argues for a documented last-time-buy sized to the product's remaining service life. Maintain CodeWarrior toolchain licenses and golden programming fixtures accordingly.
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: MC9S12XDT256CAA — 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 | MC9S12XDT256CAG | MC9S12XDT512MAA | MC9S12XD256CAA | MC9S12XDG128CAA |
|---|---|---|---|---|---|
| Package | 80-QFP (14x14 mm) | 80-QFP (14x14) - same | QFP-80 - same | 80-QFP (14x14) - same | 80-QFP (14x14) - same |
| Brand | NXP Semiconductors (Freescale) | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core / Architecture | 16-bit HCS12X (S12XD) | 16-bit HCS12X (S12XD) | 16-bit HCS12X (S12XD) | 16-bit HCS12X (S12XD) | 16-bit HCS12X (S12XD) |
| Flash Memory | 256KB (256K x 8) | 256KB | 512KB (+100%) | 256KB | 128KB (-50%) |
| Speed | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz |
主な差別化要因
- Same 256KB Flash in the identical 80-QFP footprint （vs MC9S12XDG128CAA)
- Cost-optimized memory size versus 512KB siblings （vs MC9S12XDT512MAA)
- CAA suffix configuration versus CAG （vs MC9S12XDT256CAG)
設計ノート
The MC9S12XDT256CAA is NRND per the NXP product page (as of 2026-10-18). Before starting any new board design, verify lifetime supply with NXP or an authorized distributor and register for Product Change Notices on the NXP product page. If a new design is unavoidable on this architecture, prefer the actively supported S12XE family (S912XET256/S912XET512), which shares the HCS12X software ecosystem. For sustaining existing products, size a last-time-buy to cover the remaining service life of the end equipment.
Distributor listings report a 2.35V to 5.5V supply range, which covers both 3.3V and 5V logic worlds - useful for mixed-voltage boards with legacy 5V sensors and CAN transceivers. Decouple each VDDX supply group with 100nF ceramic capacitors placed within a few millimeters of the pins, plus bulk 10uF at the board entry. Verify exact per-rail pin assignments and current limits in the S12XD datasheet, as this page does not reproduce the full power pinout. Estimated: a typical S12XD system draws tens of milliamps at 5V, well within a standard 500mA 5V regulator budget.
The 80-QFP (14x14 mm) gull-wing package requires 0.65mm-pitch land patterns per the NXP package drawing; follow IPC-recommended QFP footprint dimensions and use solder-mask-defined pads for reliable gull-wing fillets. Keep the crystal circuit traces short and guarded by ground for EMC, and route analog ADC inputs away from CAN and PWM switching lines to preserve 10-bit converter accuracy. Because the part is reflow-soldered, confirm MSL rating and bake requirements on the shipping tray label before assembly after long storage.
コンプライアンス情報
Compliance data was not stated in the verified web data. The NXP product page includes an Environmental Quality section - verify RoHS/REACH status there before finalizing bill-of-materials compliance declarations.