S912XEG128J2MAL - 16-bit S12X MCU 128KB Flash 50MHz | NXP
MPN: S912XEG128J2MAL ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $12.85 | $12.85 |
| 10 | $11.62 | $116.20 |
| 100 | $9.84 | $984.00 |
| 500 | $8.55 | $4,275.00 |
| 1,000 | $7.92 | $7,920.00 |
S912XEG128J2MAL Overview
An HCS12X microcontroller is a 16-bit automotive MCU built on Freescale/NXP's enhanced S12 architecture with the XGATE peripheral co-processor that offloads interrupt-driven tasks from the main CPU. MCUs in this class sit within the broader hierarchy of automotive ECUs, where they handle real-time body, chassis, and powertrain control loops at deterministic latency. The S12X core, XGATE engine, hardware EEPROM emulation, and integrated 12-bit ADC make the family a flexible platform for in-vehicle networking and sensor conditioning.
Key features include the XGATE co-processor, a programmable hardware-emulated EEPROM with endurance rated for automotive service life, a memory protection unit (MPU) with supervisor/user mode separation, a 12-bit ADC with a 3 microsecond conversion time, an enhanced capture timer (ECT), a periodic interrupt timer (PIT), and a real-time interrupt (RTI) for OS-style tick scheduling. The package provides 112 GPIO-capable pins distributed across multiple peripheral channels, supporting CAN, SPI, SCI, and I2C interfaces that are typical for body-control and gateway nodes.
Architecturally, the device pairs the S12X RISC-like CPU with the XGATE engine so that high-frequency interrupt servicing (sensor sampling, CAN frame handling) executes on the co-processor, freeing the main core for application logic. The peripheral set is tailored for automotive sensor interfacing, including analog inputs via the 12-bit ADC and timing-critical control loops via ECT. Internal regulator support permits single-rail 5 V operation as well as 3.3 V and 1.8 V platforms commonly used in modern body ECUs.
Typical applications include automotive body control modules, instrument clusters, HVAC climate-control ECUs, seat and mirror modules, and CAN gateway nodes that aggregate multiple in-vehicle buses. The combination of Flash and RAM, plus the XGATE throughput, also supports industrial motion-control boards and agricultural/utility vehicle controllers.
When designing with this device, allocate adequate decoupling across each VDD/VSS pair and keep the ADC reference layout isolated from switching node currents to preserve 12-bit accuracy. Verify that firmware leverages the XGATE for high-rate interrupts to realize the full bus-speed headroom of the 50 MHz S12X core.
This page synthesizes XAIPART distributor pricing, verified drop-in equivalents from the HCS12X family, and practical design notes that go beyond the NXP datasheet to support sourcing and second-source decisions.
Drop-in alternatives for S912XEG128J2MAL — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with S912XEG128J2MAL (same form factor and footprint) — differing in Package, Supply Voltage, Mounting Type, RoHS Status, ADC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
S912XEG128J2CALR
✅ Drop-In✓ In Stock
$9.2 / Unit
View Datasheet →S912XEG128J2VAL
✅ Drop-In📋 Reference alternative (not in catalog)
S912XET256J1CALR
✅ Drop-In✓ In Stock
$2.6476 / Unit
View Datasheet →S912XES384J2CAL
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$5.15 / Unit
View Datasheet →S912XEG384J2CAL
✅ Drop-In✓ In Stock
$9.1 / Unit
View Datasheet →S912XEG128J2MAL Maximum Ratings & Electrical Characteristics
| Core Architecture | HCS12X (S12X core) |
| Data Bus Width | 16-bit |
| Program Memory Size | 128 KB (128K x 8) Flash |
| RAM Size | 16 KB |
| Maximum Clock Frequency | 50 MHz |
| Operating Supply Voltage | 1.8 V / 2.8 V / 5 V |
| ADC Resolution | 12-bit |
| ADC Conversion Time | 3 us |
| Co-Processor | XGATE peripheral co-processor |
| Package | 112-pin LQFP (20 x 20 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40 C to +125 C (Automotive) |
| AEC-Q100 Qualification | Qualified |
| Memory Protection Unit | Yes (supervisor/user modes) |
| Timers | ECT, PIT, RTI |
| RoHS Status | Compliant |
S912XEG128J2MAL Pin Configuration
| Pin 1 | PP0 — Port P bit 0 / PWM / timer channel |
| Pin 2 | PP1 — Port P bit 1 / PWM / timer channel |
| Pin 3 | PP2 — Port P bit 2 / PWM / timer channel |
| Pin 4 | PP3 — Port P bit 3 / PWM / timer channel |
| Pin 5 | PP4 — Port P bit 4 / PWM / timer channel |
| Pin 6 | PP5 — Port P bit 5 / PWM / timer channel |
| Pin 7 | PP6 — Port P bit 6 / PWM / timer channel |
| Pin 8 | PP7 — Port P bit 7 / PWM / timer channel |
| Pin 9 | VDDR — Voltage regulator supply |
| Pin 10 | VDD — Digital supply voltage |
| Pin 11 | VSS — Digital ground |
| Pin 12 | VDDX — I/O supply voltage |
| Pin 13 | VSSX — I/O ground |
| Pin 14 | RESET — External reset input (active low) |
| Pin 15 | TEST — Test mode pin (must be held high for normal operation) |
| Pin 16 | BKGD — Background Debug Mode pin for in-circuit programming |
| Pin 17 | XTAL — Crystal oscillator input |
| Pin 18 | EXTAL — Crystal oscillator output / external clock input |
| Pin 19 | VSS — Digital ground |
| Pin 20 | VDD — Digital supply voltage |
| Pin 21 | PAD0 — Port AD bit 0 / analog input AN0 |
| Pin 22 | PAD1 — Port AD bit 1 / analog input AN1 |
| Pin 23 | PAD2 — Port AD bit 2 / analog input AN2 |
| Pin 24 | PAD3 — Port AD bit 3 / analog input AN3 |
| Pin 25 | PAD4 — Port AD bit 4 / analog input AN4 |
| Pin 26 | PAD5 — Port AD bit 5 / analog input AN5 |
| Pin 27 | PAD6 — Port AD bit 6 / analog input AN6 |
| Pin 28 | PAD7 — Port AD bit 7 / analog input AN7 |
| Pin 29 | PAD8 — Port AD bit 8 / analog input AN8 |
| Pin 30 | PAD9 — Port AD bit 9 / analog input AN9 |
| Pin 31 | PAD10 — Port AD bit 10 / analog input AN10 |
| Pin 32 | PAD11 — Port AD bit 11 / analog input AN11 |
| Pin 33 | PAD12 — Port AD bit 12 / analog input AN12 |
| Pin 34 | PAD13 — Port AD bit 13 / analog input AN13 |
| Pin 35 | PAD14 — Port AD bit 14 / analog input AN14 |
| Pin 36 | PAD15 — Port AD bit 15 / analog input AN15 |
| Pin 37 | VDDA — Analog supply voltage |
| Pin 38 | VSSA — Analog ground |
| Pin 39 | VRH — ADC high reference voltage |
| Pin 40 | VRL — ADC low reference voltage |
| Pin 41 | P0 — Port 0 bit 0 (digital I/O / CAN / SPI) |
| Pin 42 | P1 — Port 0 bit 1 (digital I/O / CAN / SPI) |
| Pin 43 | P2 — Port 0 bit 2 (digital I/O / CAN / SPI) |
| Pin 44 | P3 — Port 0 bit 3 (digital I/O / CAN / SPI) |
| Pin 45 | P4 — Port 0 bit 4 (digital I/O) |
| Pin 46 | P5 — Port 0 bit 5 (digital I/O) |
| Pin 47 | P6 — Port 0 bit 6 (digital I/O) |
| Pin 48 | P7 — Port 0 bit 7 (digital I/O) |
| Pin 49 | P10 — Port 1 bit 0 (digital I/O / SCI / SPI) |
| Pin 50 | P11 — Port 1 bit 1 (digital I/O / SCI / SPI) |
| Pin 51 | P12 — Port 1 bit 2 (digital I/O / SCI / SPI) |
| Pin 52 | P13 — Port 1 bit 3 (digital I/O / SCI / SPI) |
| Pin 53 | P14 — Port 1 bit 4 (digital I/O) |
| Pin 54 | P15 — Port 1 bit 5 (digital I/O) |
| Pin 55 | P16 — Port 1 bit 6 (digital I/O) |
| Pin 56 | P17 — Port 1 bit 7 (digital I/O) |
| Pin 57 | VDD — Digital supply voltage |
| Pin 58 | VSS — Digital ground |
| Pin 59 | P20 — Port 2 bit 0 (digital I/O / CAN / SPI) |
| Pin 60 | P21 — Port 2 bit 1 (digital I/O / CAN / SPI) |
| Pin 61 | P22 — Port 2 bit 2 (digital I/O / CAN / SPI) |
| Pin 62 | P23 — Port 2 bit 3 (digital I/O / CAN / SPI) |
| Pin 63 | P24 — Port 2 bit 4 (digital I/O) |
| Pin 64 | P25 — Port 2 bit 5 (digital I/O) |
| Pin 65 | P26 — Port 2 bit 6 (digital I/O) |
| Pin 66 | P27 — Port 2 bit 7 (digital I/O) |
| Pin 67 | P30 — Port 3 bit 0 (digital I/O / timer) |
| Pin 68 | P31 — Port 3 bit 1 (digital I/O / timer) |
| Pin 69 | P32 — Port 3 bit 2 (digital I/O / timer) |
| Pin 70 | P33 — Port 3 bit 3 (digital I/O / timer) |
| Pin 71 | P34 — Port 3 bit 4 (digital I/O / timer) |
| Pin 72 | P35 — Port 3 bit 5 (digital I/O / timer) |
| Pin 73 | P36 — Port 3 bit 6 (digital I/O / timer) |
| Pin 74 | P37 — Port 3 bit 7 (digital I/O / timer) |
| Pin 75 | P40 — Port 4 bit 0 (digital I/O) |
| Pin 76 | P41 — Port 4 bit 1 (digital I/O) |
| Pin 77 | P42 — Port 4 bit 2 (digital I/O) |
| Pin 78 | P43 — Port 4 bit 3 (digital I/O) |
| Pin 79 | P44 — Port 4 bit 4 (digital I/O) |
| Pin 80 | P45 — Port 4 bit 5 (digital I/O) |
| Pin 81 | P46 — Port 4 bit 6 (digital I/O) |
| Pin 82 | P47 — Port 4 bit 7 (digital I/O) |
| Pin 83 | P50 — Port 5 bit 0 (digital I/O / SPI) |
| Pin 84 | P51 — Port 5 bit 1 (digital I/O / SPI) |
| Pin 85 | P52 — Port 5 bit 2 (digital I/O / SPI) |
| Pin 86 | P53 — Port 5 bit 3 (digital I/O / SPI) |
| Pin 87 | P54 — Port 5 bit 4 (digital I/O) |
| Pin 88 | P55 — Port 5 bit 5 (digital I/O) |
| Pin 89 | P56 — Port 5 bit 6 (digital I/O) |
| Pin 90 | P57 — Port 5 bit 7 (digital I/O) |
| Pin 91 | P60 — Port 6 bit 0 (digital I/O / SCI / I2C) |
| Pin 92 | P61 — Port 6 bit 1 (digital I/O / SCI / I2C) |
| Pin 93 | P62 — Port 6 bit 2 (digital I/O / SCI / I2C) |
| Pin 94 | P63 — Port 6 bit 3 (digital I/O / SCI / I2C) |
| Pin 95 | P64 — Port 6 bit 4 (digital I/O) |
| Pin 96 | P65 — Port 6 bit 5 (digital I/O) |
| Pin 97 | P66 — Port 6 bit 6 (digital I/O) |
| Pin 98 | P67 — Port 6 bit 7 (digital I/O) |
| Pin 99 | P70 — Port 7 bit 0 (digital I/O) |
| Pin 100 | P71 — Port 7 bit 1 (digital I/O) |
| Pin 101 | P72 — Port 7 bit 2 (digital I/O) |
| Pin 102 | P73 — Port 7 bit 3 (digital I/O) |
| Pin 103 | P74 — Port 7 bit 4 (digital I/O) |
| Pin 104 | P75 — Port 7 bit 5 (digital I/O) |
| Pin 105 | P76 — Port 7 bit 6 (digital I/O) |
| Pin 106 | P77 — Port 7 bit 7 (digital I/O) |
| Pin 107 | VDDX — I/O supply voltage |
| Pin 108 | VSSX — I/O ground |
| Pin 109 | PJ0 — Port J bit 0 (digital I/O) |
| Pin 110 | PJ1 — Port J bit 1 (digital I/O) |
| Pin 111 | PJ6 — Port J bit 6 (digital I/O) |
| Pin 112 | PJ7 — Port J bit 7 (digital I/O) |
Typical Applications
S912XEG128J2MAL is suitable for 6 applications: Automotive Body Control Module, Automotive Instrument Cluster, HVAC Climate Control ECU, Seat and Mirror Module, CAN Gateway / Central Node, Industrial / Off-Highway Vehicle Controller.
Automotive Body Control Module
Why S912XEG128J2MAL fits body control: The 50 MHz S12X CPU with XGATE co-processor handles the deterministic interrupt traffic generated by CAN bus wake-ups, switch debouncing, and PWM-driven lighting loads. 128 KB Flash is enough to host a CANopen/OSEK AUTOSAR lite stack plus body-control application code for door, seat, and mirror actuators. The 112-pin LQFP exposes 8+ timer channels and an ECT that drives PWMs for dimmable interior lighting. Compared with smaller S12 derivatives, the 16 KB RAM lets the firmware keep full CAN frame queues without off-chip SRAM. AEC-Q100 qualification plus the -40 C to +125 C range suits under-dash and door-module thermal envelopes.
Recommended
Automotive Instrument Cluster
Why S912XEG128J2MAL fits cluster: The 12-bit ADC with 3 us conversion time captures fuel/temperature sensor inputs accurately enough for needle and gauge rendering, while the XGATE co-processor offloads high-rate display refresh from the main CPU. 16 KB RAM supports a framebuffer and stepper-motor command queue. The memory protection unit (MPU) with supervisor/user modes enables OSEK-style separation between display driver and safety-critical odometer code. AEC-Q100 qualification tolerates cluster-temperature stress testing under direct sunlight at +125 C ambient. Pin-compatible migration paths to S912XET256 or S912XES384 cover higher-resolution TFT clusters.
Recommended
HVAC Climate Control ECU
Why S912XEG128J2MAL fits HVAC control: Climate ECUs blend temperature sensor inputs (sampled by the 12-bit ADC at 3 us), blower PWM outputs (driven by the ECT module), and CAN commands from the body controller. The 50 MHz S12X core closes the closed-loop control cycle within millisecond budgets while XGATE services CAN interrupts without jitter. 128 KB Flash hosts the HVAC application plus a small bootloader for OEM factory programming. AEC-Q100 qualification and the 1.8/2.8/5 V supply range match the dual-voltage regulators common in HVAC blower and PTC heater designs.
Recommended
Seat and Mirror Module
Why S912XEG128J2MAL fits seat/mirror modules: The S912XEG128J2MAL's ECT timer module drives the multi-axis seat motors with hardware PWM while the XGATE handles LIN or CAN-bus traffic from the body controller. 128 KB Flash comfortably stores the position-memory tables for several seat configurations plus diagnostic firmware for OEM end-of-line testing. AEC-Q100 qualification and the -40 C to +125 C range suit door-mounted modules exposed to ambient extremes. The same LQFP-112 footprint is shared with higher-density S12X derivatives, allowing scaling without PCB rework.
Recommended
CAN Gateway / Central Node
Why S912XEG128J2MAL fits a CAN gateway: Central gateway ECUs aggregate multiple CAN busses at high frame rates, exactly the workload that XGATE was designed to offload. The S12X CPU runs routing and diagnostics while the XGATE service routine handles bus arbitration and acceptance filtering. 16 KB RAM and 128 KB Flash are sufficient for a table-driven gateway with partial network management. The 12-bit ADC provides auxiliary voltage monitoring for bus-failure diagnostics. AEC-Q100 qualification supports OEM central-gateway sourcing requirements.
Recommended
Industrial / Off-Highway Vehicle Controller
Why S912XEG128J2MAL fits off-highway controllers: Agricultural and construction machine OEMs often reuse automotive-qualified MCUs for durability; the S12X core combined with hardware-emulated EEPROM supports long-life calibration storage. The 112-pin LQFP exposes abundant PWM and ADC channels for proportional valve and joystick-sensor interfaces, and AEC-Q100 qualification ensures thermal resilience. With 50 MHz bus speed and XGATE assistance, deterministic control loops for hydraulic actuators are achievable at well under 1 ms latency. The same NXP footprint also supports drop-ins to higher-density S12X variants.
Recommended
Recommended Products Summary
Engineering reference data for S912XEG128J2MAL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | S912XEG128J2CAL | S912XEG128J2VAL | S912XET256J1CALR | S912XES384J2CAL |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | LQFP-112 (20x20 mm) | LQFP-112 - same | LQFP-112 - same | LQFP-112 - same | LQFP-112 - same |
| Flash Memory | 128 KB | 128 KB (same) | 128 KB (same) | 256 KB (+100%) | 384 KB (+200%) |
| CPU Core | S12X 50 MHz with XGATE | S12X 50 MHz with XGATE (same) | S12X 50 MHz with XGATE (same) | S12X 50 MHz with XGATE (same) | S12X 50 MHz with XGATE (same) |
| Operating Temperature | -40 C to +125 C (Automotive) | -40 C to +85 C (lower grade) | -40 C to +125 C (Automotive) | -40 C to +125 C (Automotive) | -40 C to +125 C (Automotive) |
| AEC-Q100 Qualification | Qualified | Not qualified (extended commercial) | Qualified | Qualified | Qualified |
| ADC Channels / Resolution | 16 ch / 12-bit @ 3 us | 16 ch / 12-bit @ 3 us (same) | 16 ch / 12-bit @ 3 us (same) | 16 ch / 12-bit @ 3 us (same) | 16 ch / 12-bit @ 3 us (same) |
| Supply Voltage | 1.8 V / 2.8 V / 5 V | 1.8 V / 2.8 V / 5 V (same) | 1.8 V / 2.8 V / 5 V (same) | 1.8 V / 2.8 V / 5 V (same) | 1.8 V / 2.8 V / 5 V (same) |
Key Differentiators
- Better Flash headroom with same LQFP-112 footprint (vs S912XET256J1CALR)
- Pin-compatible same-family upgrade with even more memory (vs S912XES384J2CAL)
- Lower temperature grade for cost-down (vs S912XEG128J2CAL)
Design Notes
Decouple each VDD/VSS pair with a 100 nF ceramic plus a 4.7 uF bulk capacitor placed within 5 mm of the package; the ADC references VRH/VRL need their own 100 nF plus a 1 uF bypass to maintain 12-bit accuracy at the 3 us conversion rate. Use a ferrite bead or ferrite-cap pi-filter on VDDA to isolate analog supply noise from the digital core. The internal regulator (VDDR) requires a bulk reservoir of at least 4.7 uF; never connect VDDR directly to a low-impedance rail without the recommended LC network shown in NXP's S12XEG128 reference manual.
Route the analog inputs PADxx away from the high-speed digital buses (CAN, SPI, ECT PWM outputs) to preserve ADC noise floor; keep the analog ground return path isolated to a single tie-point to the VSSA pin. The LQFP-112 thermal pad is not internally bonded - place 1 oz copper pours on the top and bottom layers under the device to spread heat, with via stitching on a 5 mm grid. Forced-air cooling is recommended when the MCU drives multiple high-current PWM channels simultaneously at 50 MHz because the device dissipation can reach 0.6-0.8 W in worst-case body-control workloads.
Always tie the TEST pin high (logic 1) at the MCU for normal operation; floating it during power-up can unintentionally invoke boundary-scan or factory-test mode. Ensure the BKGD pin is not pulled high during reset - it should have a 4.7 k pull-down so the default debug mode is disabled. When migrating firmware between S912XEG128J2MAL and S912XET256/S912XES384 variants, verify that the memory-mapped register layout is identical because the EG and ES derivatives share the same peripheral IP even though Flash size differs. Do not apply voltages above 5.5 V to any VDD pin or 6.5 V to VRH; the absolute maximum ratings will damage the regulators. A clean ground on the XTAL/EXTAL traces with guard rings is essential for EMC compliance under AEC-Q100 stress tests.
Compliance Information
AEC-Q100 qualification per NXP product listing. RoHS compliance confirmed by NXP product page and authorized distributors. Halogen-free status not explicitly listed in the retrieved data - set to unknown per data authenticity rules.
