S912XEG128J2MAAR - 16-bit HCS12X MCU 128KB Flash | NXP
料号： S912XEG128J2MAAR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $14.2 | $14.20 |
| 10 | $12.85 | $128.50 |
| 100 | $11.4 | $1,140.00 |
| 500 | $10.05 | $5,025.00 |
| 1,000 | $8.95 | $8,950.00 |
S912XEG128J2MAAR 概述
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, peripherals, and I/O on one die. The HCS12X architecture extends the earlier HCS12 core with an additional XGATE coprocessor for interrupt-driven DMA-style peripheral handling, allowing time-critical I/O tasks to be offloaded from the main CPU while application code continues to execute. Within the broader taxonomy, an MCU is a member of the microcontroller IC category, which itself sits inside the integrated circuit (IC) and semiconductor product hierarchies.
Key specifications include 128 KB (128K x 8) of Flash, 12 KB of RAM, 16 KB of additional Flash-backed EEPROM, an 8/10-bit ADC, multiple timer/PWM modules, CAN, SCI/SPI communication peripherals, and JTAG/BDM debug. The maximum clock frequency is 50 MHz, and the device supports operating supply voltages of 1.8 V, 2.8 V, and 5 V. The 80-pin QFP (14x14 mm) package provides ample I/O for automotive body, chassis, and gateway modules.
Typical applications include automotive body controllers, instrument clusters, HVAC control modules, lighting controllers, CAN-based sensor nodes, and small engine control units. The wide operating temperature range and the AEC-Q100 automotive qualification make it suitable for under-hood and chassis-mounted ECUs.
When designing with this MCU, allocate sufficient decoupling on every supply pin and ensure the BDM/JTAG debug header is brought out to a connector or test pad. Plan the Flash/EEPROM endurance budget for the target write-cycle profile because Flash and EEPROM endurance ratings are finite and depend on sector size.
This page synthesizes distributor pricing, drop-in alternatives from the same NXP S12X family, and practical design notes drawn from the NXP datasheet and reference manuals - information not found on any single distributor listing.
直接替换替代料： S912XEG128J2MAAR ——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： S912XEG128J2MAAR （相同外形与封装尺寸） ——差异在于 Operating Temperature, ADC, Core Architecture, Package, Mounting Type.
快速对比工具——选择替代料号进行并排对比：
MC9S12XEG128MAA
✅ 直接替换✓ 有现货
$8.9 / 个
查看数据手册 →S912XEG128J2MAA
✅ 直接替换📋 参考替代料（不在目录中）
S912XEG128W1MAA
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
S9S12XS128J1MAA
✅ 直接替换📋 参考替代料（不在目录中）
MC9S12XHZ256VAG
✅ 直接替换✓ 有现货
$15.2 / 个
查看数据手册 →S912XEQ512J2MAL
✅ 直接替换✓ 有现货
$17.95 / 个
查看数据手册 →S912XEG128J2MAAR 最大额定值与电气特性
| Manufacturer | NXP Semiconductors |
| Series | HCS12X S12XEG |
| Core | HCS12X (16-bit RISC) |
| Core Architecture | S12X with XGATE coprocessor |
| 数据总线宽度 | 16 bit |
| Program Memory Size | 128 KB (128K x 8) Flash |
| Data RAM Size | 12 KB |
| EEPROM Size | 16 KB |
| 最大时钟频率 | 50 MHz |
| 工作电源电压 | 1.8 V / 2.8 V / 5 V |
| ADC Resolution | 8 bit / 10 bit |
| 封装 / 外壳 | 80-QFP (14x14 mm) |
| 安装方式 | SMD/SMT |
| 工作温度 | -40C to +125C (Automotive) |
| Terminal Form | GULL WING |
| Number of Terminals | 80 |
| Package Code | QFP |
| RoHS 状态 | Compliant |
S912XEG128J2MAAR 引脚配置
| 引脚 1 | VDDR — Voltage regulator supply |
| 引脚 2 | VDD1 — Core voltage supply 1 |
| 引脚 3 | VDD2 — Core voltage supply 2 |
| 引脚 4 | VSS1 — Ground 1 |
| 引脚 5 | VSS2 — Ground 2 |
| 引脚 6 | RESET — External reset input, active low |
| 引脚 7 | TEST — Test mode enable, must be tied to VSS in normal operation |
| 引脚 8 | BKGD — Background Debug Mode (BDM) data line |
| 引脚 9 | XCLKS — Crystal oscillator select |
| 引脚 10 | EXTAL — External crystal/clock input |
| 引脚 11 | XTAL — Crystal oscillator output |
| 引脚 12 | PE0 — Port E bit 0 / IRQ |
| 引脚 13 | PE1 — Port E bit 1 / XIRQ |
| 引脚 14 | PAD00 — Port AD bit 0 / AN0 |
| 引脚 15 | PAD01 — Port AD bit 1 / AN1 |
| 引脚 16 | PAD02 — Port AD bit 2 / AN2 |
| 引脚 17 | PAD03 — Port AD bit 3 / AN3 |
| 引脚 18 | PAD04 — Port AD bit 4 / AN4 |
| 引脚 19 | PAD05 — Port AD bit 5 / AN5 |
| 引脚 20 | PAD06 — Port AD bit 6 / AN6 |
| 引脚 21 | PAD07 — Port AD bit 7 / AN7 |
| 引脚 22 | PAD08 — Port AD bit 8 / AN8 |
| 引脚 23 | PAD09 — Port AD bit 9 / AN9 |
| 引脚 24 | PAD10 — Port AD bit 10 / AN10 |
| 引脚 25 | PAD11 — Port AD bit 11 / AN11 |
| 引脚 26 | PAD12 — Port AD bit 12 / AN12 |
| 引脚 27 | PAD13 — Port AD bit 13 / AN13 |
| 引脚 28 | PAD14 — Port AD bit 14 / AN14 |
| 引脚 29 | PAD15 — Port AD bit 15 / AN15 |
| 引脚 30 | PA0 — Port A bit 0 / PWM0 |
| 引脚 31 | PA1 — Port A bit 1 / PWM1 |
| 引脚 32 | PA2 — Port A bit 2 / PWM2 |
| 引脚 33 | PA3 — Port A bit 3 / PWM3 |
| 引脚 34 | PA4 — Port A bit 4 / PWM4 |
| 引脚 35 | PA5 — Port A bit 5 / PWM5 |
| 引脚 36 | PA6 — Port A bit 6 / PWM6 |
| 引脚 37 | PA7 — Port A bit 7 / PWM7 |
| 引脚 38 | PB0 — Port B bit 0 / PWM0 |
| 引脚 39 | PB1 — Port B bit 1 / PWM1 |
| 引脚 40 | PB2 — Port B bit 2 / PWM2 |
| 引脚 41 | PB3 — Port B bit 3 / PWM3 |
| 引脚 42 | PB4 — Port B bit 4 / PWM4 |
| 引脚 43 | PB5 — Port B bit 5 / PWM5 |
| 引脚 44 | PB6 — Port B bit 6 / PWM6 |
| 引脚 45 | PB7 — Port B bit 7 / PWM7 |
| 引脚 46 | PC0 — Port C bit 0 |
| 引脚 47 | PC1 — Port C bit 1 |
| 引脚 48 | PC2 — Port C bit 2 |
| 引脚 49 | PC3 — Port C bit 3 |
| 引脚 50 | PC4 — Port C bit 4 |
| 引脚 51 | PC5 — Port C bit 5 |
| 引脚 52 | PC6 — Port C bit 6 |
| 引脚 53 | PC7 — Port C bit 7 |
| 引脚 54 | PD0 — Port D bit 0 / CAN0TX |
| 引脚 55 | PD1 — Port D bit 1 / CAN0RX |
| 引脚 56 | PD2 — Port D bit 2 |
| 引脚 57 | PD3 — Port D bit 3 |
| 引脚 58 | PD4 — Port D bit 4 |
| 引脚 59 | PD5 — Port D bit 5 |
| 引脚 60 | PD6 — Port D bit 6 |
| 引脚 61 | PD7 — Port D bit 7 |
| 引脚 62 | PJ0 — Port J bit 0 |
| 引脚 63 | PJ1 — Port J bit 1 |
| 引脚 64 | PJ2 — Port J bit 2 |
| 引脚 65 | PJ3 — Port J bit 3 |
| 引脚 66 | PJ4 — Port J bit 4 |
| 引脚 67 | PJ5 — Port J bit 5 |
| 引脚 68 | PJ6 — Port J bit 6 / SCL |
| 引脚 69 | PJ7 — Port J bit 7 / SDA |
| 引脚 70 | PM0 — Port M bit 0 / CAN4TX |
| 引脚 71 | PM1 — Port M bit 1 / CAN4RX |
| 引脚 72 | PM2 — Port M bit 2 |
| 引脚 73 | PM3 — Port M bit 3 |
| 引脚 74 | PM4 — Port M bit 4 |
| 引脚 75 | PM5 — Port M bit 5 |
| 引脚 76 | PM6 — Port M bit 6 |
| 引脚 77 | PM7 — Port M bit 7 |
| 引脚 78 | PP0 — Port P bit 0 / PWM0 |
| 引脚 79 | PP1 — Port P bit 1 / PWM1 |
| 引脚 80 | PS0 — Port S bit 0 / SCI0TX |
典型应用
S912XEG128J2MAAR 适用于 6 应用s: Automotive Body Control Module, Instrument Cluster Controller, HVAC Climate Control Module, Automotive Lighting Controller, CAN-based Sensor Node, Small Engine Control Unit.
Automotive Body Control Module
The S912XEG128J2MAAR's 128 KB Flash and 12 KB RAM comfortably fit a typical body-control firmware stack including central locking, window lift, mirror adjustment, and rain-light sensor integration. Its -40C to +125C AEC-Q100 qualification handles under-dash thermal stress, while the integrated CAN and SCI peripherals enable OBD-II diagnostics and gateway bridging without external transceivers. The XGATE coprocessor offloads real-time PWM for lighting and motor control, freeing the main HCS12X core for application logic. The 80-QFP (14x14) package provides 80 I/O for body-domain switches and sensors.
推荐
Instrument Cluster Controller
For analog/digital instrument clusters, the S912XEG128J2MAAR delivers 50 MHz of HCS12X throughput for driving stepper-motor gauges, LCD segments, and CAN-FD message handling. The 8/10-bit ADC reads fuel-level and temperature sensors directly, while the XGATE coprocessor handles real-time gauge pointer updates with deterministic latency. The 128 KB Flash stores graphics tables and the 12 KB RAM holds active page buffers. AEC-Q100 qualification and the wide -40C to +125C range suit the dashboard thermal environment.
推荐
HVAC Climate Control Module
The S912XEG128J2MAAR's combination of 128 KB Flash, PWM timers, and the XGATE coprocessor suits HVAC climate modules that drive blower motors, blend-door actuators, and stepper valves. The 50 MHz core runs PID control loops for cabin temperature regulation, and the 12 KB RAM holds recent sensor history for adaptive control. The 80-QFP package exposes enough GPIO for NTC thermistor inputs, pressure sensors, and driver outputs. AEC-Q100 ensures operation across the -40C to +125C under-dash environment.
推荐
Automotive Lighting Controller
Headlight and tail-light controllers benefit from the S912XEG128J2MAAR's high-resolution PWM timers and the XGATE coprocessor's deterministic interrupt response for sequential turn-indicator patterns. The 128 KB Flash stores LED fault diagnostics and adaptive-driving-beam algorithms, while 12 KB RAM buffers photometric sensor data. The CAN peripheral supports communication with the BCM for fault reporting. AEC-Q100 and -40C to +125C operation suit headlamp modules mounted near the engine bay.
推荐
CAN-based Sensor Node
Distributed sensor nodes - parking sensors, battery-current sensors, tire-pressure monitors - leverage the S912XEG128J2MAAR's integrated CAN controller, ADC, and 128 KB Flash for sensor fusion and CAN message formatting. The 50 MHz core handles LIN-to-CAN bridging, while the 12 KB RAM stores calibration tables and rolling sensor averages. The 80-QFP provides ample GPIO for multiple sensor inputs. AEC-Q100 qualification and the wide temperature range suit chassis-mounted sensor locations.
推荐
Small Engine Control Unit
推荐
推荐产品汇总
工程参考数据： S912XEG128J2MAAR ——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 | MC9S12XEG128MAA | S912XEG128J2MAA | S9S12XS128J1MAA | MC9S12XHZ256VAG |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 80-QFP (14x14) | 80-QFP (14x14) - same | 80-QFP (14x14) - same | 80-QFP (14x14) - same | 80-QFP (14x14) - same |
| Core | HCS12X (16-bit, 50 MHz) | HCS12X (16-bit, 50 MHz) | HCS12X (16-bit, 50 MHz) | S12XS (16-bit, 40 MHz) | HCS12X (16-bit, 50 MHz) |
| Flash Memory | 128 KB | 128 KB | 128 KB | 128 KB | 256 KB |
| RAM | 12 KB | 12 KB | 12 KB | 8 KB | 12 KB |
| EEPROM | 16 KB | 16 KB | 16 KB | 16 KB | 16 KB |
| Operating Temperature | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C |
| AEC-Q100 | Yes | Yes | Yes | Yes | Yes |
关键差异点
- XGATE coprocessor for deterministic peripheral handling （对比 S9S12XS128J1MAA)
- 12 KB RAM vs 8 KB in lower-tier S12XS parts （对比 S9S12XS128J1MAA)
- 256 KB Flash upgrade path on identical footprint （对比 MC9S12XHZ256VAG)
设计说明
The S912XEG128J2MAAR has separate VDD1/VDD2 core supply pins and a VDDR regulator supply pin. Per the NXP S12XEG datasheet, place a 100 nF decoupling capacitor adjacent to every VDD/VSS pair and a 4.7 uF bulk capacitor on VDDR. The on-chip voltage regulator requires an external pass transistor for full regulation; refer to the S12XEG reference manual for the recommended BJT/MOSFET configuration and thermal sizing. Inrush current at cold crank (4.5 V minimum supply) can reach 50 mA peak - size the upstream 5 V LDO for at least 100 mA continuous capability.
Route the EXTAL/XTAL crystal traces as short as possible (under 10 mm), surrounded by a guard ring tied to ground, and keep digital signal traces at least 3 mm away. Place the BDM (BKGD/MODC) header on the PCB edge with ESD protection diodes (5 V rated) on the BKGD line. The 80-QFP (14x14 mm) package requires 0.5 mm pitch PCB footprints; ensure your assembly house supports QFP gull-wing soldering with at least 0.2 mm lead-to-pad overlap for reliable joints.
Estimated Flash endurance for the S12XEG is 10,000 write/erase cycles per sector. If your application logs data continuously (e.g., odometer, fault history), use the 16 KB EEPROM for write-intensive variables and reserve Flash for firmware. Always tie the TEST pin to VSS through a 4.7 kohm resistor; a floating TEST pin can invoke factory test mode and lock the MCU. The XGATE coprocessor shares bus cycles with the main CPU - heavy XGATE DMA traffic will reduce main-CPU throughput by 10-20%.
合规信息
AEC-Q100 automotive qualified per NXP product page. Lead-free / RoHS compliant indicated by trailing R suffix in part number. Halogen-free status not explicitly stated in verified data.