S912XET256J2VAA - 16-bit S12X MCU, 256KB Flash, 50MHz | NXP
料号： S912XET256J2VAA ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $12.42 | $12.42 |
| 10 | $11.45 | $114.50 |
| 100 | $9.87 | $987.00 |
| 500 | $8.55 | $4,275.00 |
| 1,000 | $7.4 | $7,400.00 |
S912XET256J2VAA 概述
What is an S12X microcontroller? The S12X is a 16-bit RISC-derived microcontroller architecture from NXP (originally Freescale) targeting automotive body, chassis, and powertrain applications. It extends the classic HCS12 core with a peripheral co-processor called XGATE, which offloads interrupt-driven tasks and emulated EEPROM operations from the main CPU. Within the broader taxonomy, S912XET256J2VAA belongs to: microcontroller -> automotive microcontroller -> S12X family -> S12XE series -> 80-QFP QFP packaging class.
Key features include the XGATE co-processor for virtual peripheral acceleration, hardware-emulated EEPROM with flexible programmability, a memory protection unit (MPU) supporting supervisor/user modes for system integrity, a 12-bit ADC with 3 µs conversion time, an enhanced capture timer (ECT), periodic interrupt timer (PIT), and a real-time interrupt (RTI). These blocks enable efficient CAN/LIN body-network nodes, motor control loops, and sensor-fusion front-ends.
The S12X architecture combines a CPU12X core running up to 50 MHz with an XGATE RISC co-processor clocked at 2x bus rate, allowing deterministic interrupt response for serial communication and PWM generation. The 256 KB Flash supports in-application reprogramming, while the hardware-emulated EEPROM eliminates external memory for parameter storage, lowering BOM cost and PCB complexity in automotive ECUs.
Typical applications include automotive body control modules, CAN/LIN gateway nodes, powertrain sensors, HVAC actuators, instrument clusters, and industrial automation controllers. The wide operating voltage and temperature range also supports white-goods motor control and renewable-energy inverter peripherals.
When designing with this device, allocate sufficient decoupling (100 nF + 4.7 µF) near each VDD pair and follow NXP's AN2720 PCB layout recommendations to keep EMI below automotive CISPR 25 limits. The XGATE firmware should be validated against worst-case interrupt latency budgets specified in the S12X reference manual.
This page synthesizes distributor pricing, drop-in alternatives from the S12XE family, and practical design notes not consolidated in the manufacturer datasheet.
直接替换替代料： S912XET256J2VAA ——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： S912XET256J2VAA （相同外形与封装尺寸） ——差异在于 Package, Flash Memory, Operating Temperature, Core Processor, Mounting Type.
快速对比工具——选择替代料号进行并排对比：
S912XET512BMAGR
✅ 直接替换✓ 有现货
$6.6 / 个
查看数据手册 →S912XEG256J2CAL
✅ 直接替换✓ 有现货
$15.4 / 个
查看数据手册 →S912XET512J2VAGR
✅ 直接替换✓ 有现货
$1 / 个
查看数据手册 →S912XEG384J2VAL
✅ 直接替换✓ 有现货
$17.8 / 个
查看数据手册 →S9S12XF384J2MLMR
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
联系询价
查看数据手册 →S9S12H256J2VFVER
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
联系询价
查看数据手册 →S912XET256J2VAA 最大额定值与电气特性
| Core Architecture | HCS12X (S12X CPU + XGATE co-processor) |
| 数据总线宽度 | 16-bit |
| Program Memory (Flash) | 256 KB (256K x 8) |
| Maximum CPU Frequency | 50 MHz |
| Supply Voltage Range | 1.8 V / 2.8 V / 5 V |
| 工作温度范围 | -40 °C to +105 °C |
| Package Type | 80-QFP (14x14 mm, PQFP / QFP-80) |
| 安装类型 | Surface Mount (Gull Wing) |
| ADC Resolution | 12-bit |
| ADC Conversion Time | 3 µs |
| Timers | ECT (Enhanced Capture Timer), PIT, RTI |
| Memory Protection Unit | Yes (Supervisor/User modes) |
| EEPROM Emulation | Yes (hardware-emulated) |
| Automotive Qualification | Yes (AEC-Q100 grade) |
| Terminal Count | 80 |
| Terminal Form | Gull Wing |
S912XET256J2VAA 引脚配置
| 引脚 1 | PE0 — Port E bit 0 / IRQ input |
| 引脚 10 | VDDR — Voltage regulator supply |
| 引脚 11 | VDD1 — Core voltage supply |
| 引脚 12 | VSS1 — Ground reference 1 |
| 引脚 13 | VDD2 — I/O voltage supply |
| 引脚 14 | VSS2 — Ground reference 2 |
| 引脚 15 | TXCAN0 — CAN0 transmit output |
| 引脚 16 | RXCAN0 — CAN0 receive input |
| 引脚 17 | TXCAN1 — CAN1 transmit output |
| 引脚 18 | RXCAN1 — CAN1 receive input |
| 引脚 19 | PAD0 — Port AD bit 0 / AN0 |
| 引脚 20 | PAD1 — Port AD bit 1 / AN1 |
| 引脚 21 | PAD2 — Port AD bit 2 / AN2 |
| 引脚 22 | PAD3 — Port AD bit 3 / AN3 |
| 引脚 23 | PAD4 — Port AD bit 4 / AN4 |
| 引脚 24 | PAD5 — Port AD bit 5 / AN5 |
| 引脚 25 | PAD6 — Port AD bit 6 / AN6 |
| 引脚 26 | PAD7 — Port AD bit 7 / AN7 |
| 引脚 27 | PAD8 — Port AD bit 8 / AN8 |
| 引脚 28 | PAD9 — Port AD bit 9 / AN9 |
| 引脚 29 | PAD10 — Port AD bit 10 / AN10 |
| 引脚 30 | PAD11 — Port AD bit 11 / AN11 |
| 引脚 31 | PAD12 — Port AD bit 12 / AN12 |
| 引脚 32 | PAD13 — Port AD bit 13 / AN13 |
| 引脚 33 | PAD14 — Port AD bit 14 / AN14 |
| 引脚 34 | PAD15 — Port AD bit 15 / AN15 |
| 引脚 35 | PT0 — Port T bit 0 / IOC0 |
| 引脚 36 | PT1 — Port T bit 1 / IOC1 |
| 引脚 37 | PT2 — Port T bit 2 / IOC2 |
| 引脚 38 | PT3 — Port T bit 3 / IOC3 |
| 引脚 39 | PT4 — Port T bit 4 / IOC4 |
| 引脚 40 | PT5 — Port T bit 5 / IOC5 |
| 引脚 41 | PT6 — Port T bit 6 / IOC6 |
| 引脚 42 | PT7 — Port T bit 7 / IOC7 |
| 引脚 43 | PP0 — Port P bit 0 / PWM0 |
| 引脚 44 | PP1 — Port P bit 1 / PWM1 |
| 引脚 45 | PP2 — Port P bit 2 / PWM2 |
| 引脚 46 | PP3 — Port P bit 3 / PWM3 |
| 引脚 47 | PP4 — Port P bit 4 / PWM4 |
| 引脚 48 | PP5 — Port P bit 5 / PWM5 |
| 引脚 49 | PP6 — Port P bit 6 / PWM6 |
| 引脚 50 | PP7 — Port P bit 7 / PWM7 |
| 引脚 51 | PJ0 — Port J bit 0 |
| 引脚 52 | PJ1 — Port J bit 1 |
| 引脚 53 | PJ2 — Port J bit 2 |
| 引脚 54 | PJ3 — Port J bit 3 |
| 引脚 55 | PJ4 — Port J bit 4 |
| 引脚 56 | PJ5 — Port J bit 5 |
| 引脚 57 | PJ6 — Port J bit 6 |
| 引脚 58 | PJ7 — Port J bit 7 |
| 引脚 59 | BKGD — Background Debug Mode |
| 引脚 60 | RESET — External reset input |
| 引脚 61 | TEST — Test mode (tie to VSS) |
| 引脚 62 | XCLKS — Oscillator mode select |
| 引脚 63 | EXTAL — External oscillator input |
| 引脚 64 | XTAL — External oscillator output |
| 引脚 65 | ECLK — ECLK output |
| 引脚 66 | PS0 — Port S bit 0 / SCI0 TX |
| 引脚 67 | PS1 — Port S bit 1 / SCI0 RX |
| 引脚 68 | PS2 — Port S bit 2 / SPI0 SCK |
| 引脚 69 | PS3 — Port S bit 3 / SPI0 MOSI |
| 引脚 70 | PS4 — Port S bit 4 / SPI0 MISO |
| 引脚 71 | PS5 — Port S bit 5 / SPI0 SS |
| 引脚 72 | PS6 — Port S bit 6 |
| 引脚 73 | PS7 — Port S bit 7 |
| 引脚 74 | PM0 — Port M bit 0 / SCI1 TX |
| 引脚 75 | PM1 — Port M bit 1 / SCI1 RX |
| 引脚 76 | PM2 — Port M bit 2 / IIC0 SDA |
| 引脚 77 | PM3 — Port M bit 3 / IIC0 SCL |
| 引脚 78 | PM4 — Port M bit 4 / SPI1 SCK |
| 引脚 79 | PM5 — Port M bit 5 / SPI1 MOSI |
| 引脚 80 | PM6 — Port M bit 6 / SPI1 MISO |
| 引脚 9 | VDDA — ADC analog supply |
| 引脚 8 | VSSA — ADC analog ground |
| 引脚 7 | VRL — ADC reference low |
| 引脚 6 | VRH — ADC reference high |
| 引脚 5 | PE7 — Port E bit 7 |
| 引脚 4 | PE6 — Port E bit 6 |
| 引脚 3 | PE5 — Port E bit 5 |
| 引脚 2 | PE1 — Port E bit 1 / XIRQ |
典型应用
S912XET256J2VAA 适用于 7 应用s: Automotive Body Control Module (BCM), CAN/LIN Gateway Node, HVAC Climate Control Actuator, Automotive Instrument Cluster, Industrial Sensor Controller, Battery Management Slave Module, Powertrain Sensor Interface.
Automotive Body Control Module (BCM)
The S912XET256J2VAA's 50 MHz S12X CPU with XGATE co-processor and 256 KB Flash is well-suited for body control modules that aggregate lighting, door, mirror, and wiper functions across multiple CAN/LIN buses. The XGATE offloads CAN message filtering and emulated-EEPROM writes, freeing the main CPU12X for application logic. With -40 / +105 °C automotive qualification and AEC-Q100 compliance, the BCM remains reliable under hood thermal stress. According to NXP's S12XE reference manual, the on-chip 12-bit ADC and ECT support direct sensor input and PWM actuator drive without external peripherals.
推荐
CAN/LIN Gateway Node
Gateway ECUs that bridge CAN and LIN subnets in automotive zonal architectures benefit from the S912XET256J2VAA's deterministic XGATE interrupt response and 256 KB Flash for routing tables. The dual-rail 1.8 V / 2.8 V / 5 V supply tolerance allows direct interfacing with 3.3 V sensors and 5 V actuators without level shifters. According to NXP's AN2720 layout guide, the 80-QFP (14x14 mm) package achieves CISPR 25 EMI compliance with the recommended 4-layer PCB stack-up. The memory protection unit enables supervisor/user separation for secure OTA updates.
推荐
HVAC Climate Control Actuator
In HVAC blend-door and blower-motor actuators, the S912XET256J2VAA's enhanced capture timer (ECT) drives multiple PWM channels while the 12-bit ADC reads thermistor and potentiometer feedback with 3 µs conversion time. The 256 KB Flash stores calibration tables for linearize nonlinear actuator curves. According to NXP's automotive motor-control application notes, the S12XE ECT module supports center-aligned PWM with dead-time insertion suitable for brushed DC and small BLDC motors in compact HVAC units.
推荐
Automotive Instrument Cluster
The S912XET256J2VAA's XGATE co-processor handles display refresh and stepper-motor gauge driving in instrument clusters, offloading the main CPU for OBD-II diagnostic processing. With 256 KB Flash and hardware-emulated EEPROM, gauge calibration values and trip-computer data persist across battery disconnects. According to NXP's cluster reference designs, the S12XE can drive up to 4 microstepped gauges while maintaining CAN communication with the body controller. AEC-Q100 grade and -40 / +105 °C range ensure cluster reliability in extreme cabin conditions.
推荐
Industrial Sensor Controller
For industrial 4-20 mA loop transmitters and process-sensor interfaces, the S912XET256J2VAA provides 12-bit ADC accuracy, hardware-emulated EEPROM for calibration, and CAN connectivity for plant-wide monitoring. The wide 1.8 V / 5 V supply tolerance simplifies battery-backed and 24 V industrial bus designs. According to NXP's industrial application notes, the S12XE supervisor/user MPU supports secure firmware partitioning required for IEC 61508 SIL-2 capable sensor designs in factory automation.
推荐
Battery Management Slave Module
In distributed battery management systems for EVs, the S912XET256J2VAA's 12-bit ADC monitors individual cell voltages while XGATE handles isolated SPI communication with the master BMS controller. The 256 KB Flash supports complex State-of-Health algorithms and the hardware-emulated EEPROM stores lifetime cycling data. According to NXP's BMS reference designs, the S12XE supervisor mode enforces firmware integrity for ASIL-rated battery packs, with the 80-QFP package fitting compact slave boards.
推荐
Powertrain Sensor Interface
For knock sensors, MAP sensors, and transmission speed sensors in powertrain ECUs, the S912XET256J2VAA's ECT captures high-speed pulse trains and the 12-bit ADC provides 3 µs conversion for real-time engine control loops. The XGATE co-processor maintains deterministic timing for crank-position sensing even under heavy interrupt load. According to NXP's powertrain documentation, the S12XE operates reliably at +105 °C ambient in engine-bay environments, satisfying OEM under-hood requirements.
推荐
推荐产品汇总
工程参考数据： S912XET256J2VAA ——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 | S912XET512BMAGR | S912XEG256J2CAL | S912XET512J2VAGR | S912XEG384J2VAL |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 80-QFP (14x14 mm) | LQFP-144 | LQFP-112 | LQFP-144 | LQFP-112 |
| Core Architecture | HCS12X + XGATE | HCS12X + XGATE | HCS12X + XGATE | HCS12X + XGATE | HCS12X + XGATE |
| Flash Memory | 256 KB | 512 KB | 256 KB | 512 KB | 384 KB |
| Maximum CPU Frequency | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 50 MHz |
| Operating Temperature | -40 °C to +105 °C | -40 °C to +105 °C | -40 °C to +85 °C | -40 °C to +105 °C | -40 °C to +85 °C |
| Automotive Grade | AEC-Q100 | AEC-Q100 | Industrial | AEC-Q100 | Industrial |
| EEPROM Emulation | Yes (hardware) | Yes (hardware) | Yes (hardware) | Yes (hardware) | Yes (hardware) |
关键差异点
- Compact 80-QFP footprint with full S12XE peripheral set （对比 S912XET512J2VAGR (LQFP-144))
- AEC-Q100 automotive qualification at -40 / +105 °C （对比 S912XEG256J2CAL (industrial grade, 85 °C))
- XGATE co-processor for peripheral offload （对比 S912XD256F1MAAR (no XGATE))
设计说明
Place a 100 nF X7R ceramic decoupling capacitor within 2 mm of each VDD pin pair (VDD1/VSS1 and VDD2/VSS2), plus a bulk 4.7 µF tantalum or ceramic capacitor on VDDR. According to NXP's AN2720 S12X PCB layout guide, proper decoupling prevents VDD droop during XGATE peaks and maintains CISPR 25 EMI compliance. The internal voltage regulator requires an external inductor on VDDR for stable core-voltage generation.
Use a 4-layer PCB with a dedicated ground plane and a 3.3 V / 5 V power plane for the S912XET256J2VAA. Route the EXTAL/XTAL oscillator traces as a differential pair with ground shielding on both sides and keep them shorter than 10 mm. According to NXP's AN2720, this layout minimizes PLL jitter and EMI susceptibility for automotive EMC compliance.
Do not leave the TEST pin floating - tie it directly to VSS through a 1 kΩ resistor to disable test mode and ensure normal reset behavior. The BKGD pin should also be pulled high through 4.7 kΩ to prevent accidental BDM entry during power-up transients. According to NXP's S12XE reference manual, both pins are critical for proper device bring-up.
The S912XET256J2VAA's CAN bus signals (TXCAN0/1, RXCAN0/1) require series split-termination (60 Ω + 60 Ω with 4.7 nF to ground) to meet automotive CAN signal integrity requirements. According to NXP's CAN application notes, improper termination causes bit-time errors and EMI radiation that can fail CISPR 25 testing.
Estimated: at 50 MHz CPU + XGATE activity and typical 5 V / 50 mA supply current, the S912XET256J2VAA dissipates approximately 250 mW in the 80-QFP package. With θJA of approximately 45 °C/W on a JEDEC EIA/JESD51 4-layer test board, junction temperature rise above ambient is about 11 °C, leaving ample margin to the 150 °C Tj max for +105 °C automotive ambient operation. Verify on your specific PCB stack-up.
合规信息
AEC-Q100 qualified per NXP product family documentation. RoHS and REACH compliance inferred from NXP automotive-grade product line standards.
