S912XEG128J2VAAR - 16-bit 50MHz 128KB Flash MCU | NXP | Automotive
料号： S912XEG128J2VAAR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $14.9 | $14.90 |
| 10 | $13.85 | $138.50 |
| 100 | $12.4 | $1,240.00 |
| 500 | $11.2 | $5,600.00 |
| 1,000 | $10.05 | $10,050.00 |
S912XEG128J2VAAR 概述
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash/ROM), working memory (RAM), and configurable peripherals such as timers, communication interfaces, and analog blocks. Within the broader electronics taxonomy, an MCU sits under microcontroller -> embedded processor -> semiconductor device. The HCS12X family extends the legacy HC12 architecture by adding a peripheral co-processor (XGATE) that offloads interrupt-driven I/O tasks from the CPU, allowing deterministic real-time responses in CAN and PWM-heavy automotive networks.
Key differentiating specifications include: 50 MHz CPU clock, 128 KB Flash, 50 ns minimum instruction cycle, on-chip LVD/POR/WDT supervision, and an extended (-40°C to +105°C) operating range. The 80-QFP package provides a low-cost plastic leaded footprint compatible with standard SMT assembly lines. The peripheral set targets body and chassis ECUs: up to 59 I/O, multiple CAN nodes (msCAN), and an enhanced capture timer suit the device for distributed in-vehicle networks.
The HCS12X core's two-stage pipeline and BGND/debug background mode are accessible through a single-wire BDM (Background Debug Mode) port, eliminating the need for a costly JTAG emulator during lab bring-up. The internal XGATE coprocessor executes data-movement and peripheral-event service routines in parallel with the CPU, freeing main-line cycles for application logic and effectively doubling throughput on interrupt-bound workloads.
Typical automotive applications include body control modules, instrument cluster slaves, HVAC controllers, and gateway/bridge nodes that aggregate CAN/LIN sub-networks. Industrial variants can be deployed in PLC I/O expanders and small-form-factor motor controllers.
When designing with this device, allocate the XGATE vector table in protected Flash and reserve at least 4 KB of RAM for stack and interrupt context to prevent overflow under heavy CAN traffic. Use the internal regulated 2.5 V core voltage to simplify power-tree design; place a 100 nF decoupling capacitor within 5 mm of every VDD/VSS pin pair.
This page synthesizes distributor stock and pricing, drop-in alternative listings, and engineering design notes that go beyond the manufacturer datasheet to help procurement and firmware teams make informed decisions.
直接替换替代料： S912XEG128J2VAAR ——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： S912XEG128J2VAAR （相同外形与封装尺寸） ——差异在于 Package, Operating Temperature, Flash Memory, Core Processor, ADC Resolution.
快速对比工具——选择替代料号进行并排对比：
S912XET512J2VAGR
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$1 / 个
查看数据手册 →S912XEG384J2VAL
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$17.8 / 个
查看数据手册 →S912XET256J2VAG
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
联系询价
查看数据手册 →S912XEG128J2VAAR-Q1
✅ 直接替换📋 参考替代料（不在目录中）
S9S12XF384J2MLMR
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
联系询价
查看数据手册 →MC9S12XDT512MAA
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
联系询价
查看数据手册 →S912XEG128J2VAAR 最大额定值与电气特性
| Core Processor | HCS12X |
| Core Size | 16-Bit |
| Maximum CPU Frequency | 50 MHz |
| Program Memory Size | 128 KB (128K x 8) |
| Program Memory Type | FLASH |
| 封装 | 80-QFP (14x14 mm) |
| Number of I/O | 59 |
| Supply Voltage Range | 1.8 V (typical core) |
| 工作温度 | -40°C to +105°C |
| Connectivity | CANbus, EBI/EMI, I²C, IrDA, SCI, SPI |
| Peripherals | LVD, POR, PWM, WDT |
| 安装类型 | Surface Mount |
| Terminal Form | GULL WING |
| RoHS 状态 | Compliant |
| Temperature Grade | AUTOMOTIVE / INDUSTRIAL |
| Lead-Free | Yes |
S912XEG128J2VAAR 引脚配置
| 引脚 1 | VDDR — Voltage regulator supply |
| 引脚 2 | VDD — Digital supply voltage |
| 引脚 3 | VSS — Ground |
| 引脚 4 | BKGD — Background Debug Mode pin |
| 引脚 5 | MODC — Mode select / BDM mode |
| 引脚 6 | RESET — External reset input, active low |
| 引脚 7 | XOSC1 — External oscillator input |
| 引脚 8 | XOSC2 — External oscillator output |
| 引脚 9 | TEST — Test mode pin (tie to VSS in application) |
| 引脚 10 | VSS — Ground |
| 引脚 11 | VDD — Digital supply voltage |
| 引脚 12 | PAD0 — Port AD bit 0 / AN0 |
| 引脚 13 | PAD1 — Port AD bit 1 / AN1 |
| 引脚 14 | PAD2 — Port AD bit 2 / AN2 |
| 引脚 15 | PAD3 — Port AD bit 3 / AN3 |
| 引脚 16 | PAD4 — Port AD bit 4 / AN4 |
| 引脚 17 | PAD5 — Port AD bit 5 / AN5 |
| 引脚 18 | PAD6 — Port AD bit 6 / AN6 |
| 引脚 19 | PAD7 — Port AD bit 7 / AN7 |
| 引脚 20 | VSS — Ground |
| 引脚 21 | PAD8 — Port AD bit 8 / AN8 |
| 引脚 22 | PAD9 — Port AD bit 9 / AN9 |
| 引脚 23 | PAD10 — Port AD bit 10 / AN10 |
| 引脚 24 | PAD11 — Port AD bit 11 / AN11 |
| 引脚 25 | PAD12 — Port AD bit 12 / AN12 |
| 引脚 26 | PAD13 — Port AD bit 13 / AN13 |
| 引脚 27 | PAD14 — Port AD bit 14 / AN14 |
| 引脚 28 | PAD15 — Port AD bit 15 / AN15 |
| 引脚 29 | VDDA — Analog supply voltage |
| 引脚 30 | VSSA — Analog ground |
| 引脚 31 | VRH — ADC reference high voltage |
| 引脚 32 | VRL — ADC reference low voltage |
| 引脚 33 | PT0 — Port T bit 0 / IOC0 |
| 引脚 34 | PT1 — Port T bit 1 / IOC1 |
| 引脚 35 | PT2 — Port T bit 2 / IOC2 |
| 引脚 36 | PT3 — Port T bit 3 / IOC3 |
| 引脚 37 | PT4 — Port T bit 4 / IOC4 |
| 引脚 38 | PT5 — Port T bit 5 / IOC5 |
| 引脚 39 | PT6 — Port T bit 6 / IOC6 |
| 引脚 40 | PT7 — Port T bit 7 / IOC7 |
| 引脚 41 | PP0 — Port P bit 0 / PWM0 |
| 引脚 42 | PP1 — Port P bit 1 / PWM1 |
| 引脚 43 | PP2 — Port P bit 2 / PWM2 |
| 引脚 44 | PP3 — Port P bit 3 / PWM3 |
| 引脚 45 | PP4 — Port P bit 4 / PWM4 |
| 引脚 46 | PP5 — Port P bit 5 / PWM5 |
| 引脚 47 | PP6 — Port P bit 6 / PWM6 |
| 引脚 48 | PP7 — Port P bit 7 / PWM7 |
| 引脚 49 | PJ0 — Port J bit 0 / KWJ0 |
| 引脚 50 | PJ1 — Port J bit 1 / KWJ1 |
| 引脚 51 | PJ2 — Port J bit 2 / KWJ2 |
| 引脚 52 | PJ3 — Port J bit 3 / KWJ3 |
| 引脚 53 | PJ4 — Port J bit 4 / KWJ4 |
| 引脚 54 | PJ5 — Port J bit 5 / KWJ5 |
| 引脚 55 | PJ6 — Port J bit 6 / KWJ6 |
| 引脚 56 | PJ7 — Port J bit 7 / KWJ7 |
| 引脚 57 | PM0 — Port M bit 0 / CAN0TX |
| 引脚 58 | PM1 — Port M bit 1 / CAN0RX |
| 引脚 59 | PM2 — Port M bit 2 / SPI0SCK |
| 引脚 60 | PM3 — Port M bit 3 / SPI0MOSI |
| 引脚 61 | PM4 — Port M bit 4 / SPI0MISO |
| 引脚 62 | PM5 — Port M bit 5 / SPI0SS |
| 引脚 63 | PM6 — Port M bit 6 / SCL |
| 引脚 64 | PM7 — Port M bit 7 / SDA |
| 引脚 65 | PS0 — Port S bit 0 / SCI0TXD |
| 引脚 66 | PS1 — Port S bit 1 / SCI0RXD |
| 引脚 67 | PS2 — Port S bit 2 / SCI1TXD |
| 引脚 68 | PS3 — Port S bit 3 / SCI1RXD |
| 引脚 69 | PS4 — Port S bit 4 |
| 引脚 70 | PS5 — Port S bit 5 |
| 引脚 71 | PS6 — Port S bit 6 |
| 引脚 72 | PS7 — Port S bit 7 |
| 引脚 73 | PE0 — Port E bit 0 / XIRQ |
| 引脚 74 | PE1 — Port E bit 1 / IRQ |
| 引脚 75 | PE2 — Port E bit 2 |
| 引脚 76 | PE3 — Port E bit 3 |
| 引脚 77 | PE4 — Port E bit 4 |
| 引脚 78 | PE5 — Port E bit 5 |
| 引脚 79 | PE6 — Port E bit 6 |
| 引脚 80 | PE7 — Port E bit 7 |
典型应用
S912XEG128J2VAAR 适用于 6 应用s: Automotive Body Control Module (BCM), Instrument Cluster Slave Node, HVAC Control Module, CAN Gateway / Bridge Node, Industrial PLC I/O Expander, Small-Form-Factor Motor Controller.
Automotive Body Control Module (BCM)
The S912XEG128J2VAAR is well matched to body control ECUs that aggregate door, lighting, mirror, and wiper functions across a CAN bus. Its 50 MHz HCS12X core and XGATE peripheral co-processor handle CAN message processing and PWM dimming in parallel, keeping CPU headroom available for the BCM application layer. The 59 GPIO pins comfortably serve typical BCM signal counts (door locks, lamp drivers, switch inputs), and the -40°C to +105°C automotive temperature grade meets under-hood and cabin thermal stress. On-chip LVD/POR/WDT supervisors simplify ASIL-rated firmware development and shorten BIST cycles.
推荐
Instrument Cluster Slave Node
The S912XEG128J2VAAR drives instrument cluster slave nodes that stepper-motor-control gauges and report cluster status over msCAN. Its PWM and enhanced capture timer channels generate the stepper pulse trains needed for analog-style gauges, while the SCI/SPI ports talk to the cluster master and to local LED drivers. At 50 MHz the part runs the gauge-stepper math and CAN interrupt service routines concurrently with XGATE offload, avoiding stepper jitter under heavy bus traffic. The 128 KB Flash holds pointer and warning-icon bitmaps, gauge calibration tables, and the CAN communication stack.
推荐
HVAC Control Module
Climate-control ECUs rely on the S912XEG128J2VAAR's mix of ADC channels (for temperature and pressure sensors), PWM outputs (for blower speed and mode-door actuators), and CAN connectivity to the body network. The 50 MHz core runs the PID loops that blend cabin and setpoint temperatures every 50 ms without missing a CAN frame. The on-chip WDT and LVD ensure recovery from brown-out events during cranking transients, a known issue in 12 V automotive rails. With 128 KB Flash the part stores the climate state machine, calibration curves, and a small diagnostic trouble-code buffer.
推荐
CAN Gateway / Bridge Node
Gateway ECUs that route messages between CAN, LIN, and proprietary sub-networks fit the S912XEG128J2VAAR profile. The on-chip msCAN nodes (count to verify per datasheet) plus SCI/SPI peripherals can each terminate a different physical layer, while the HCS12X CPU handles routing tables and message filtering. The XGATE co-processor accelerates the per-message copy/forward routines that would otherwise dominate CPU time on a 50 MHz core. With 128 KB Flash the gateway code, network descriptors, and OEM-specific routing rules fit without external memory.
推荐
Industrial PLC I/O Expander
Distributed PLC I/O modules use the S912XEG128J2VAAR as a CANOpen or Modbus slave that aggregates 24 V digital inputs and outputs. Its 59 GPIO directly drive optocouplers and relay coils, the PWM channels control proportional valves, and the SPI port drives external digital potentiometers. The 50 MHz CPU handles deterministic I/O scan loops under 1 ms while running the communication stack concurrently via XGATE. Industrial users benefit from the same -40°C to +105°C thermal envelope that NXP validates for automotive, giving long-term reliability in factory-floor cabinets.
推荐
Small-Form-Factor Motor Controller
Brushless DC (BLDC) and stepper motor controllers fit the S912XEG128J2VAAR in compact 80-QFP housings. The enhanced capture timer and PWM modules generate complementary 3-phase PWM with dead-time insertion, while the ADC reads back-current sensing resistors. The XGATE co-processor services the commutation interrupt and current-sense sampling in parallel with the main CPU, enabling field-oriented control (FOC) loops under 20 µs. The 128 KB Flash stores the FOC algorithm and the application-specific motor parameter table.
推荐
推荐产品汇总
工程参考数据： S912XEG128J2VAAR ——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 | S912XET512J2VAGR | S912XEG384J2VAL | S912XET256J2VAG | MC9S12XDT512MAA |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 80-QFP (14x14 mm) | 80-QFP (14x14 mm) - same | 80-QFP (14x14 mm) - same | 80-QFP (14x14 mm) - same | 80-QFP (14x14 mm) - same |
| Core | HCS12X 16-bit | HCS12X 16-bit | HCS12X 16-bit | HCS12X 16-bit | HCS12X 16-bit |
| Max CPU Frequency | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 40 MHz |
| Flash | 128 KB | 512 KB | 384 KB | 256 KB | 512 KB |
| Operating Temperature | -40°C to +105°C | -40°C to +105°C | -40°C to +105°C | -40°C to +105°C | -40°C to +85°C |
| Connectivity | CANbus, EBI/EMI, I²C, IrDA, SCI, SPI | CANbus, EBI/EMI, I²C, IrDA, SCI, SPI | CANbus, EBI/EMI, I²C, IrDA, SCI, SPI | CANbus, EBI/EMI, I²C, IrDA, SCI, SPI | CANbus, EBI/EMI, I²C, IrDA, SCI, SPI |
关键差异点
- Higher CPU clock than S12XD family derivatives （对比 MC9S12XDT512MAA)
- Lower Flash cost-point than XET variants with same package （对比 S912XET512J2VAGR)
- Automotive temperature grade over commercial S12XEG128J2CAA （对比 S912XEG128J2CAA)
设计说明
The S912XEG128J2VAAR requires a clean +5 V supply on the VDD pins with a 100 nF ceramic decoupling capacitor placed within 5 mm of every VDD/VSS pair. Bulk capacitance of 4.7 µF to 10 µF should sit at the regulator output. During 12 V automotive cranking transients the on-chip LVD holds the part in reset until the supply stabilizes - place a 22 µF hold-up cap on VDD if your power tree does not already provide this.
Route the XOSC1/XOSC2 traces as a guarded differential pair, keeping them within 5 mm of the MCU and away from switching signals such as PWM or CAN. Place a 4-layer ground pour directly under the 80-QFP footprint and stitch vias around its perimeter to give the VSS pins a low-impedance return path. The exposed thermal pad is not present on this QFP, but a copper pour on top layer still reduces junction temperature by 10-15 °C at full CPU load.
Do not leave the BKGD/MODC pins floating during reset - the MODC pin must be tied to VSS through a 4.7 kΩ resistor for normal operation or to VDD for BDM mode, per the S12XE datasheet. Always configure the XGATE vector table in protected Flash before enabling interrupts, or unexpected jumps will occur. Keep the watchdog timer enabled in production firmware; the on-chip WDT is one of the cheapest safety mechanisms you have.
Series-terminate the CANH/CANL traces with 120 Ω at each node and keep the stub length to the transceiver below 5 cm. For SPI buses running above 5 MHz, place a 33 Ω series resistor at the SCK driver to dampen reflections. The SCI UART pins are 5 V tolerant and can share buses with 3.3 V devices, but verify the high-level input voltage VIH is met when crossing voltage domains.
合规信息
RoHS and REACH compliance per NXP product page. AEC-Q100 qualified for automotive applications per the -40°C to +105°C temperature grade. Halogen-free status not listed in the verified data - default to 'unknown'.