MC9S12XA256CAL - 16-bit 80MHz 256KB Flash MCU | NXP
料号： MC9S12XA256CAL ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $33.64 | $33.64 |
| 10 | $31.96 | $319.60 |
| 100 | $30.28 | $3,028.00 |
| 500 | $28.59 | $14,295.00 |
| 1,000 | $26.91 | $26,910.00 |
MC9S12XA256CAL 概述
A 16-bit microcontroller is a single-chip computing device whose data bus width is 16 bits, positioned in the hierarchy of embedded processors between 8-bit MCUs (such as the HCS08) and 32-bit MCUs. NXP's S12X family descends from the Freescale HCS12 (S12) architecture, adding an enhanced HCS12X core with an XGATE co-processor concept family lineage and delivering two to five times the performance of a 25 MHz HCS12 device while retaining a high degree of pin and code compatibility with the older HCS12 family.
Key features of the MC9S12XA256CAL include 256KB (256K x 8) of on-chip Flash for code and data storage, an 80MHz maximum clock speed achieved via an internal phase-locked loop, 59 I/O lines for board-level control, a 10-bit ADC for analog sensing, and the cost-effective power consumption, electromagnetic compatibility, and code-size efficiency advantages characteristic of the S12X family.
Architecturally, the S12XA is a CISC-based 16-bit core optimized for low interrupt latency and deterministic real-time behavior, traits valued in body electronics, instrumentation, and industrial control. The wide 2.35V to 5.5V operating window allows direct operation from automotive-grade 5V rails while supporting lower-voltage designs. The LQFP 20x20 mm gull-wing package supports standard surface-mount assembly and reflow soldering.
Typical applications include automotive body modules (door, seat, lighting control), industrial automation controllers, motor control and HVAC systems, and instrumentation panels that need moderate Flash density and robust I/O without the complexity of a 32-bit platform.
A key design consideration: this part is listed by NXP as NRND (Not Recommended for New Designs), so new designs should evaluate newer S12XE/S12XS family members such as the S912XET512 series, while the MC9S12XA256CAL remains suitable for sustaining existing production.
This page synthesizes distributor pricing, verified drop-in alternatives, and practical design notes not found in the manufacturer product page.
直接替换替代料： MC9S12XA256CAL ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： MC9S12XA256CAL （相同外形与封装尺寸） ——差异在于 Operating Temperature, Core, Package, ADC, Core Processor.
快速对比工具——选择替代料号进行并排对比：
MC9S12XD256CAL
✅ 直接替换✓ 有现货
$17.2 / 个
查看数据手册 →MC9S12XA256CAAR
✅ 直接替换✓ 有现货
$9.95 / 个
查看数据手册 →MC9S12XDT256CAG
✅ 直接替换✓ 有现货
$17.4 / 个
查看数据手册 →MC9S12XEP768CAG
✅ 直接替换✓ 有现货
$19.85 / 个
查看数据手册 →S912XET256J2VAG
✅ 直接替换✓ 有现货
联系询价
查看数据手册 →MC9S12XA256CAL 最大额定值与电气特性
| Core Processor | HCS12X (S12XA), 16-bit CISC |
| Core Size | 16-bit |
| Maximum Clock Speed | 80 MHz |
| Program Memory Size | 256 KB (256K x 8) Flash |
| Supply Voltage Range | 2.35 V to 5.5 V |
| I/O Count | 59 |
| ADC Resolution | 10 bit |
| 数据总线宽度 | 16 bit |
| 封装 | 112-LQFP (20x20 mm) |
| 安装类型 | Surface Mount (SMD/SMT, gull-wing) |
| 生命周期状态 | NRND (Not Recommended for New Designs) per NXP |
| Architecture Family | S12X / HCS12X |
| Program Memory Type | FLASH |
| 引脚数量 | 112 |
MC9S12XA256CAL 112-lqfp (20x20 mm) 引脚配置指南
MC9S12XA256CAL（112-lqfp (20x20 mm) 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： MC9S12XA256CAL.
请参阅 数据手册 以查看完整引脚配置。
典型应用
MC9S12XA256CAL 适用于 6 应用s: Automotive Body Electronics, Industrial Automation Controllers, Motor Control and HVAC Systems, Instrumentation and Test Panels, Building Automation and Gateways, Legacy HCS12 System Upgrades.
Automotive Body Electronics
Body control modules for door, seat, mirror, and lighting control are the classic S12X domain. The MC9S12XA256CAL fits here because its 80MHz 16-bit HCS12X core delivers deterministic real-time response for LIN/CAN message handling and actuator timing, while 59 I/O lines directly drive relay, LED, and motor-driver circuits through a 2.35V to 5.5V supply that tolerates automotive 5V rail conditions. The 10-bit ADC reads switch matrices, position sensors, and current-sense feedback. Firmware benefits from the family's EMC optimization and code-size efficiency, keeping cost low in high-volume modules. Since the part is NRND, use it for sustaining existing platforms and base new BOMs on the pin-compatible S12XE family to secure long-term supply.
推荐
Industrial Automation Controllers
Factory automation nodes, I/O concentrators, and small PLC-style controllers require robust 5V-tolerant I/O, deterministic interrupt latency, and moderate Flash for protocol stacks. The MC9S12XA256CAL addresses these needs with 80MHz real-time execution, 256KB Flash for Modbus/CANopen-style stacks, and 59 flexible I/O lines multiplexed with SCI, SPI, and CAN peripherals. Its CISC 16-bit core handles bit-banging and time-critical polling loops predictably, which is often harder to guarantee on heavily pipelined 32-bit cores. The 10-bit ADC supports analog sensor digitization at panel level. For new industrial designs, verify long-term availability given NRND status and consider the S12XE S912XET256J2VAG as the actively supported equivalent footprint.
推荐
Motor Control and HVAC Systems
Blower, pump, and damper motor control in HVAC and appliance systems needs synchronized PWM generation, ADC current sampling, and fast fault handling. The MC9S12XA256CAL provides the S12X peripheral set including PWM timers and the 10-bit ADC used for phase-current and position feedback, executed on an 80MHz core with low interrupt latency for closed-loop control at typical fan and pump frequencies. The 2.35V to 5.5V supply range integrates cleanly with 5V gate-driver and sensor circuits, and 59 I/O lines cover relay, valve, and user-interface functions in one chip. NRND status means new HVAC platforms should be launched on S12XE silicon while retaining MC9S12XA256CAL for field-compatible service builds.
推荐
Instrumentation and Test Panels
Bench instruments, metering front ends, and industrial panels benefit from the MC9S12XA256CAL's combination of a 10-bit ADC for measurement channels, ample 256KB Flash for display menus and calibration tables, and 59 I/O lines for keypad scanning, LED indicators, and relay switching. The 80MHz HCS12X core gives enough throughput for averaging filters and communication (SCI/SPI to display drivers) while preserving the predictable timing that metering firmware requires. Its 5V-native I/O simplifies interfacing with legacy analog conditioning circuits that 3.3V-only MCUs struggle with. Because the device is NRND, qualification teams should plan an S12XE migration path while existing panel designs continue shipping on verified MC9S12XA256CAL stock.
推荐
Building Automation and Gateways
Lighting controllers, access panels, and small protocol gateways use the MC9S12XA256CAL to bridge CAN/SCI buses and manage local I/O. The 80MHz core handles multi-message buffering and CRC-checked frame processing, while 256KB Flash accommodates protocol stacks and parameter stores in a single-chip BOM. The wide 2.35V to 5.5V operating range supports centrally powered 5V bus architectures common in building control cabinets, and EMC-optimized S12X design reduces filtering cost on long field wiring. Its deterministic interrupt structure keeps response times consistent under concurrent bus and I/O load. For newly released gateway platforms, adopt the pin-compatible S12XE parts to avoid NRND sourcing risk over the product lifetime.
推荐
Legacy HCS12 System Upgrades
Designs originally built on 25-50MHz HCS12 MCUs (for example MC9S12DG128 or MC9S12E256 platforms) can upgrade to the MC9S12XA256CAL with minimal changes, since NXP designed the S12X family for a high degree of pin and code compatibility with HCS12. The 80MHz S12XA core offers two to five times the performance of a 25 MHz HCS12, doubling Flash to 256KB for added feature sets, while reusing existing PCB footprints in the 112-LQFP case. This makes it attractive for remanufacture and mid-life refresh of vehicle, industrial, and medical-adjacent legacy boards where full redesign risk is unacceptable. Validate peripheral timing differences against the S12X datasheet during the port.
推荐
推荐产品汇总
工程参考数据： MC9S12XA256CAL ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | MC9S12XD256CAL | MC9S12XA256CAAR | MC9S12XDT256CAG | MC9S12XEP768CAG | S912XET256J2VAG |
|---|---|---|---|---|---|---|
| Package | 112-LQFP (20x20 mm) | 112-LQFP (20x20 mm) - same | 112-LQFP (20x20 mm) - same | 112-LQFP - same footprint | 112-LQFP - same footprint | 112-LQFP - same footprint |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core / Architecture | HCS12X (S12XA) 16-bit CISC | HCS12X (S12XD) 16-bit CISC | HCS12X (S12XA) 16-bit CISC | HCS12X (S12XD) 16-bit CISC | HCS12X (S12XE) 16-bit CISC | HCS12X (S12XE) 16-bit CISC |
| Max Clock Speed | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz |
| Flash Memory | 256 KB | 256 KB | 256 KB | 256 KB | 768 KB | 256 KB |
关键差异点
- 256KB Flash at lowest S12X cost point for the 112-LQFP socket （对比 MC9S12XEP768CAG)
- Performance uplift over legacy HCS12 with code compatibility （对比 MC9S12DG128MPV)
- NRND status limits new-design suitability （对比 S912XET256J2VAG)
设计说明
Lifecycle risk is the primary design issue: NXP lists the MC9S12XA256CAL as NRND, so any new PCB release should either qualify the pin-compatible S12XE replacements (S912XET256J2VAG or MC9S12XEP768CAG in the same 112-LQFP footprint) alongside it, or secure a last-time-buy inventory buffer. Distributor lead time is already listed as 'to be confirmed' by some brokers as of 2026-10-18, which typically precedes formal discontinuation. Dual-qualify two sources before locking the BOM.
Decouple the 2.35V-5.5V supply with 0.1uF ceramics at multiple VDD pins plus a bulk 10uF, following the S12X family hardware design guidance in the NXP datasheet, since 80MHz PLL operation draws fast transient currents. The wide supply range permits direct 5V rail operation, but confirm per-domain requirements: distributor data lists a 2.35-2.75V specification for one supply domain, indicating separate VDD/VDDA domains - do not assume a single-rail design applies. Verify VDDA filtering for ADC accuracy (isolate analog supply with an RC or ferrite filter).
Use a 112-LQFP 20x20 mm footprint with 0.5 mm pitch and standard gull-wing land pattern per the NXP package drawing; because all recommended alternatives share this footprint, design the land pattern once and verify alternate MPNs fit without copper changes. Place the 10-bit ADC's analog inputs away from CAN/SCI switching traces and guard them with ground pour to limit crosstalk into measurements. Provide accessible programming header pads (BDM) for flash programming, and keep crystal/PLL loop components tight to the MCU to minimize jitter.
合规信息
Compliance details were not present in the verified web data for this MPN; consult the NXP product page Environmental & Quality section for RoHS/REACH status.
