MC9S12XD256MAG - 16-Bit HCS12X 80MHz 256KB Flash MCU | NXP
料号： MC9S12XD256MAG ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $24.5 | $24.50 |
| 10 | $22.1 | $221.00 |
| 100 | $19.85 | $1,985.00 |
| 500 | $18.2 | $9,100.00 |
| 1,000 | $17.1 | $17,100.00 |
MC9S12XD256MAG 概述
Background: HCS12X is NXP's (formerly Freescale) 16-bit microcontroller architecture, evolved from the HCS12 CISC core. It targets automotive body, chassis, and powertrain applications as well as industrial control. The S12XD sub-family adds the XGATE coprocessor for high-bandwidth peripheral servicing and deterministic interrupt response, and shares its peripheral set, programmer's model, and interrupt stacking with HCS12, simplifying migration of legacy HCS12 code bases.
Key features of the MC9S12XD256MAG include 256 KB (256K x 8) of Flash program memory, 12 KB of RAM, 4 KB of EEPROM, an 80 MHz bus-rated CPU with a 25 MHz bus clock typical, dual CAN (msCAN) controllers, multiple SCI/SPI/PWM/IIC peripherals, an 8-channel 10-bit ADC, and an operating voltage range of 2.5 V/5 V that suits automotive 5 V rails.
Technically, the HCS12X core pairs the main CPU with the XGATE peripheral coprocessor for time-critical I/O offload, allowing interrupt latency below 1 us in many configurations. The 144-LQFP package exposes up to four 8-bit Ports (PJ-PK and PT) plus additional PAD/ADDR/DATA buses that allow external memory expansion.
Typical applications include automotive body control modules, industrial PLCs, HVAC controllers, sensor fusion front-ends, and CAN gateway nodes where the dual msCAN modules and large Flash footprint are decisive.
Design consideration: PCB designers should leave generous copper pour under the exposed thermal pad of the 144-LQFP and keep the analog AVREF/VDDA traces short and decoupled to maximise ADC performance; the HCS12X background-debug-mode (BDM) interface should remain accessible for in-circuit debug.
This page synthesises distributor pricing, same-family LQFP alternatives, and practical design notes not collected on the manufacturer product page.
直接替换替代料： MC9S12XD256MAG ——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： MC9S12XD256MAG （相同外形与封装尺寸） ——差异在于 ADC, Package, Supply Voltage, Core, Operating Temperature.
快速对比工具——选择替代料号进行并排对比：
MC9S12XDT256CAG
✅ 直接替换✓ 有现货
$17.4 / 个
查看数据手册 →MC9S12XDT256MAG
✅ 直接替换✓ 有现货
$10.65 / 个
查看数据手册 →MC9S12XDP512MAG
✅ 直接替换✓ 有现货
联系询价
查看数据手册 →MC9S12XDP512CAG
✅ 直接替换📋 参考替代料（不在目录中）
MC9S12XEQ512MAG
✅ 直接替换✓ 有现货
$9.75 / 个
查看数据手册 →MC9S12XA256MAG
✅ 直接替换📋 参考替代料（不在目录中）
MC9S12XD256MAG 最大额定值与电气特性
| Core Architecture | HCS12X (S12XD) |
| 数据总线宽度 | 16-bit |
| CPU Clock (max) | 80 MHz |
| Program Memory | 256 KB Flash (256K x 8) |
| RAM | 12 KB |
| EEPROM | 4 KB |
| 电源电压 | 2.5 V / 5 V |
| CAN Controllers | 2 x msCAN |
| SCI | Up to 2 |
| SPI | Up to 1 |
| ADC | 8-channel, 10-bit |
| PWM Channels | 8 (standard S12 PWM) |
| XGATE Coprocessor | Yes |
| 封装 | 144-LQFP (20 x 20 mm) |
| 工作温度 | -40C to +125C (Automotive grade) |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
MC9S12XD256MAG 引脚配置
| 引脚 1 | PE1 — Port E bit 1 (general-purpose I/O, IRQ) |
| 引脚 2 | PE0 — Port E bit 0 (general-purpose I/O, XIRQ) |
| 引脚 3 | BKGD — Background Debug Mode |
| 引脚 4 | RESET — External reset input (active low) |
| 引脚 5 | VDDR |
| 引脚 6 | VDD |
| 引脚 7 | VSS |
| 引脚 8 | VDDPLL — PLL supply |
| 引脚 9 | VSSPLL — PLL ground |
| 引脚 10 | TEST — Test mode (tie to VSS for normal operation) |
| 引脚 11 | XCLKS — Clock select (configuration) |
| 引脚 12 | EXTAL — External clock/crystal input |
| 引脚 13 | XTAL — Crystal output |
| 引脚 14 | PAD00 — External address/data bus bit 0 |
| 引脚 15 | PAD01 — External address/data bus bit 1 |
| 引脚 16 | PAD02 — External address/data bus bit 2 |
| 引脚 17 | PAD03 — External address/data bus bit 3 |
| 引脚 18 | PAD04 — External address/data bus bit 4 |
| 引脚 19 | PAD05 — External address/data bus bit 5 |
| 引脚 20 | PAD06 — External address/data bus bit 6 |
| 引脚 21 | PAD07 — External address/data bus bit 7 |
| 引脚 22 | PAD08 — External address/data bus bit 8 |
| 引脚 23 | PAD09 — External address/data bus bit 9 |
| 引脚 24 | PAD10 — External address/data bus bit 10 |
| 引脚 25 | PAD11 — External address/data bus bit 11 |
| 引脚 26 | PAD12 — External address/data bus bit 12 |
| 引脚 27 | PAD13 — External address/data bus bit 13 |
| 引脚 28 | PAD14 — External address/data bus bit 14 |
| 引脚 29 | PAD15 — External address/data bus bit 15 |
| 引脚 30 | PAD16 — External address/data bus bit 16 |
| 引脚 31 | PAD17 — External address/data bus bit 17 |
| 引脚 32 | PAD18 — External address/data bus bit 18 |
| 引脚 33 | PAD19 — External address/data bus bit 19 |
| 引脚 34 | PAD20 — External address/data bus bit 20 |
| 引脚 35 | PAD21 — External address/data bus bit 21 |
| 引脚 36 | PAD22 — External address/data bus bit 22 |
| 引脚 37 | PAD23 — External address/data bus bit 23 |
| 引脚 38 | PE2 — Port E bit 2 |
| 引脚 39 | PE3 — Port E bit 3 |
| 引脚 40 | PE4 — Port E bit 4 |
| 引脚 41 | PE5 — Port E bit 5 |
| 引脚 42 | PE6 — Port E bit 6 |
| 引脚 43 | PE7 — Port E bit 7 |
| 引脚 44 | PJ0 — Port J bit 0 |
| 引脚 45 | PJ1 — Port J bit 1 |
| 引脚 46 | PJ2 — Port J bit 2 (XIRQ) |
| 引脚 47 | PJ3 — Port J bit 3 |
| 引脚 48 | PJ4 — Port J bit 4 |
| 引脚 49 | PJ5 — Port J bit 5 |
| 引脚 50 | PJ6 — Port J bit 6 |
| 引脚 51 | PJ7 — Port J bit 7 |
| 引脚 52 | PK0 — Port K bit 0 |
| 引脚 53 | PK1 — Port K bit 1 |
| 引脚 54 | PK2 — Port K bit 2 |
| 引脚 55 | PK3 — Port K bit 3 |
| 引脚 56 | PK4 — Port K bit 4 |
| 引脚 57 | PK5 — Port K bit 5 |
| 引脚 58 | PK6 — Port K bit 6 |
| 引脚 59 | PK7 — Port K bit 7 |
| 引脚 60 | PA0 — Port A bit 0 |
| 引脚 61 | PA1 — Port A bit 1 |
| 引脚 62 | PA2 — Port A bit 2 |
| 引脚 63 | PA3 — Port A bit 3 |
| 引脚 64 | PA4 — Port A bit 4 |
| 引脚 65 | PA5 — Port A bit 5 |
| 引脚 66 | PA6 — Port A bit 6 |
| 引脚 67 | PA7 — Port A bit 7 |
| 引脚 68 | PB0 — Port B bit 0 |
| 引脚 69 | PB1 — Port B bit 1 |
| 引脚 70 | PB2 — Port B bit 2 |
| 引脚 71 | PB3 — Port B bit 3 |
| 引脚 72 | PB4 — Port B bit 4 |
| 引脚 73 | PB5 — Port B bit 5 |
| 引脚 74 | PB6 — Port B bit 6 |
| 引脚 75 | PB7 — Port B bit 7 |
| 引脚 76 | PC0 — Port C bit 0 |
| 引脚 77 | PC1 — Port C bit 1 |
| 引脚 78 | PC2 — Port C bit 2 |
| 引脚 79 | PC3 — Port C bit 3 |
| 引脚 80 | PC4 — Port C bit 4 |
| 引脚 81 | PC5 — Port C bit 5 |
| 引脚 82 | PC6 — Port C bit 6 |
| 引脚 83 | PC7 — Port C bit 7 |
| 引脚 84 | PD0 — Port D bit 0 |
| 引脚 85 | PD1 — Port D bit 1 |
| 引脚 86 | PD2 — Port D bit 2 |
| 引脚 87 | PD3 — Port D bit 3 |
| 引脚 88 | PD4 — Port D bit 4 |
| 引脚 89 | PD5 — Port D bit 5 |
| 引脚 90 | PD6 — Port D bit 6 |
| 引脚 91 | PD7 — Port D bit 7 |
| 引脚 92 | PP0 — Port P bit 0 (PWM, PWM channel) |
| 引脚 93 | PP1 — Port P bit 1 (PWM) |
| 引脚 94 | PP2 — Port P bit 2 (PWM) |
| 引脚 95 | PP3 — Port P bit 3 (PWM) |
| 引脚 96 | PP4 — Port P bit 4 (PWM) |
| 引脚 97 | PP5 — Port P bit 5 (PWM) |
| 引脚 98 | PP6 — Port P bit 6 (PWM) |
| 引脚 99 | PP7 — Port P bit 7 (PWM) |
| 引脚 100 | PT0 — Port T bit 0 (TIM timer input/output) |
| 引脚 101 | PT1 — Port T bit 1 (TIM timer input/output) |
| 引脚 102 | PT2 — Port T bit 2 (TIM timer input/output) |
| 引脚 103 | PT3 — Port T bit 3 (TIM timer input/output) |
| 引脚 104 | PT4 — Port T bit 4 (TIM timer input/output) |
| 引脚 105 | PT5 — Port T bit 5 (TIM timer input/output) |
| 引脚 106 | PT6 — Port T bit 6 (TIM timer input/output) |
| 引脚 107 | PT7 — Port T bit 7 (TIM timer input/output) |
| 引脚 108 | CAN0TX — CAN0 transmit |
| 引脚 109 | CAN0RX — CAN0 receive |
| 引脚 110 | CAN1TX — CAN1 transmit |
| 引脚 111 | CAN1RX — CAN1 receive |
| 引脚 112 | IICSCL — IIC clock |
| 引脚 113 | IICSDA — IIC data |
| 引脚 114 | SCIRX — SCI receive |
| 引脚 115 | SCITX — SCI transmit |
| 引脚 116 | SPI_SS — SPI slave select (GPIO) |
| 引脚 117 | SPI_MOSI — SPI master out / slave in |
| 引脚 118 | SPI_MISO — SPI master in / slave out |
| 引脚 119 | SPI_SCK — SPI clock |
| 引脚 120 | VDDA — Analog supply |
| 引脚 121 | VSSA — Analog ground |
| 引脚 122 | VRH — ADC high reference voltage |
| 引脚 123 | VRL — ADC low reference voltage |
| 引脚 124 | AN0 — ADC analog input 0 |
| 引脚 125 | AN1 — ADC analog input 1 |
| 引脚 126 | AN2 — ADC analog input 2 |
| 引脚 127 | AN3 — ADC analog input 3 |
| 引脚 128 | AN4 — ADC analog input 4 |
| 引脚 129 | AN5 — ADC analog input 5 |
| 引脚 130 | AN6 — ADC analog input 6 |
| 引脚 131 | AN7 — ADC analog input 7 |
| 引脚 132 | PWM0 — PWM channel 0 |
| 引脚 133 | PWM1 — PWM channel 1 |
| 引脚 134 | PWM2 — PWM channel 2 |
| 引脚 135 | PWM3 — PWM channel 3 |
| 引脚 136 | PWM4 — PWM channel 4 |
| 引脚 137 | PWM5 — PWM channel 5 |
| 引脚 138 | PWM6 — PWM channel 6 |
| 引脚 139 | PWM7 — PWM channel 7 |
| 引脚 140 | PE0_XIRQ — XIRQ shared with PE0 |
| 引脚 141 | MODC — Mode control (tie to VDD for normal single-chip mode) |
| 引脚 142 | TCLK — Timer clock input |
| 引脚 143 | TEST2 — Test pin (tie to VSS for normal operation) |
| 引脚 144 | EPAD — Exposed thermal pad (connect to VSS) |
典型应用
MC9S12XD256MAG 适用于 6 应用s: Automotive Body Control Modules, Industrial HVAC and Climate Controllers, CAN Gateway and Network Bridges, Motor Control and PWM-Driven Loads, Sensor Fusion and Front-End Acquisition, Industrial PLC and Distributed I/O Nodes.
Automotive Body Control Modules
Why it fits: The MC9S12XD256MAG's dual msCAN controllers and 256 KB Flash deliver the headroom needed for BCMs that juggle comfort, lighting and diagnostics over one CAN channel while leaving the other for service. How it is used: Often paired with LIN transceivers for seat/window control and a high-side driver IC; the HCS12X 80 MHz CPU plus XGATE allows deterministic response to bus errors within about 1 us, which is useful when handling safety-critical loads. AEC-Q100-grade temperature range (-40C to +125C) and 5 V I/O keep the part directly compatible with 12 V automotive rails.
推荐
Industrial HVAC and Climate Controllers
Why it fits: The MC9S12XD256MAG's 8-channel 10-bit ADC and 8 PWM channels map directly to temperature sensors, fan/motor drivers and valve actuators used in HVAC controllers. How it is used: Sits on a 24 V industrial rail with a small switching regulator down to 5 V, drives TRIACs through opto-isolators, and reports status via a single CAN to a central BMS. Reliable 80 MHz operation and 12 KB RAM give enough room for PID tables and fault logging without external SRAM expansion.
推荐
CAN Gateway and Network Bridges
Why it fits: With two independent msCAN controllers and HCS12X instruction queue, MC9S12XD256MAG can route messages between two buses, filter them in RAM, and forward with sub-millisecond latency. How it is used: Typically deployed as a body-to-powertrain or CAN-to-LIN bridge, sitting between a higher-speed powertrain bus and a lower-speed body bus while handling diagnostics over UDS. The 256 KB Flash accommodates large routing tables in automotive-grade firmware.
推荐
Motor Control and PWM-Driven Loads
Why it fits: The 8 PWM channels and 16-bit timers of MC9S12XD256MAG suit small brushless DC and stepper motor controllers for pumps, fans and small actuators. How it is used: Senses phase currents with the on-chip 10-bit ADC and commutates via PWM; HCS12X code runs vector control loops at sub-millisecond rates with XGATE offloading ADC interrupts for cleaner timing margins. The 144-LQFP footprint brings enough I/O to drive multiple half-bridges in parallel.
推荐
Sensor Fusion and Front-End Acquisition
Why it fits: The MC9S12XD256MAG offers enough ADC and digital I/O bandwidth to aggregate inputs from pressure, temperature and position sensors before relaying them over CAN. How it is used: Front-end modules in chassis systems run ADC sampling for shock and yaw sensors, buffer timestamps in RAM, and post-processed frames onto CAN using one of the msCAN peripherals, leaving the main CPU free for diagnostics. AEC-Q100-grade temperature rating is critical for under-hood mounting.
推荐
Industrial PLC and Distributed I/O Nodes
Why it fits: The 80 MHz HCS12X CPU and large Flash let MC9S12XD256MAG run ladder logic plus diagnostics in a single IC, eliminating a separate communications processor. How it is used: Acts as a CAN-IO node on a factory bus, scanning 8 digital inputs per ADC channel-set and driving 8 PWM outputs back to solenoids. The 4 KB EEPROM stores calibration data that survives flash upgrades, while 5 V-tolerant I/O simplifies industrial wiring without extra level shifters.
推荐
推荐产品汇总
工程参考数据： MC9S12XD256MAG ——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 | MC9S12XDT256CAG | MC9S12XDT256MAG | MC9S12XDP512MAG |
|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 144-LQFP (20x20) | 144-LQFP (20x20) | 144-LQFP (20x20) | 144-LQFP (20x20) |
| Core | HCS12X 16-bit | HCS12X 16-bit | HCS12X 16-bit | HCS12X 16-bit |
| Maximum CPU Clock | 80 MHz | 80 MHz | 80 MHz | 80 MHz |
| Flash Memory | 256 KB | 512 KB | 256 KB | 512 KB |
| RAM | 12 KB | 20 KB | 12 KB | 32 KB |
| EEPROM | 4 KB | 4 KB | 4 KB | 4 KB |
| CAN Controllers | 2 x msCAN | 2 x msCAN | 2 x msCAN | 2 x msCAN |
关键差异点
- Optimal Flash density in the S12XD 144-LQFP family at lowest cost （对比 MC9S12XDT256CAG)
- XGATE coprocessor for deterministic peripheral offload （对比 MC9S12XA256MAG)
- Identical peripheral count versus higher Flash variants （对比 MC9S12XDP512MAG)
设计说明
Estimated: VDDR supplies the internal 1.8V regulator and must be bypassed with a 1uF X7R ceramic placed within 5 mm of the pin; the 2.5V VDDPLL rail is sensitive to noise and should be filtered through a ferrite bead. Power-on reset asserts until VDD rises above 2.4V, after which the device enters single-chip mode. A 10 kohm pull-up on RESET to VDD is recommended and a 10 nF cap to VSS prevents false resets in noisy automotive environments.
The 144-LQFP exposed thermal pad (EPAD, pin 144) must be soldered to a contiguous ground copper pour of at least 1 square inch to keep junction temperature below 125C under 80 MHz operation. Without the EPAD connection, theta_JA exceeds 50 C/W and the device may derate under sustained 100% CPU load. Recommended: 4-layer PCB with solid ground planes top and bottom.
Route analog pins (AN0-AN7, VRH, VRL, VDDA, VSSA) on a different layer than digital I/O and keep traces short. Place the 10 nF AVREF bypass cap adjacent to VRH/VRL. The BDM/debug port must be reachable for firmware updates - include a 6-pin 2x3 header footprint even if unused in production to allow field debugging via P&E Multilink or USBDM tools.
Do not leave MODC floating - tie to VDD for normal single-chip mode or to VSS for special modes (otherwise undefined boot behaviour). Always programme the CONFIG register to set clock source (PLL or oscillator) before issuing any application code; an unconfigured device boots from internal 1 MHz IRC and CAN bit timing will be wrong. For CAN bit timing, ensure tq segment lengths meet the S12X clock calculator defaults for 500 kbps and 1 Mbps operation.
合规信息
RoHS and REACH compliance per NXP product family data. AEC-Q100 qualified for automotive Grade 0 (-40C to +125C). Halogen-free status not explicitly confirmed in the verified sources and marked as [DATA_NEEDED]; NXP S12XD family is generally halogen-free per NXP policy.