S912XET256J2MAL - 16-bit 50MHz 256KB MCU | NXP | Automotive
MPN: S912XET256J2MAL ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $17.6 | $17.60 |
| 10 | $16.6 | $166.00 |
| 100 | $15.3 | $1,530.00 |
| 500 | $14.2 | $7,100.00 |
| 1,000 | $13.1 | $13,100.00 |
S912XET256J2MAL Overview
A microcontroller (MCU) is a single integrated circuit that combines a processor core, program memory, data memory, and peripherals such as timers, ADCs, and communication interfaces on one die. Within the semiconductor hierarchy, the S912XET256J2MAL sits in the 16-bit microcontroller class, part of the HCS12X (S12XE) family descended from the industry-proven HCS12 architecture, widely used in body electronics, instrumentation, and industrial control where deterministic single-cycle-equivalent execution and 5V I/O tolerance remain design requirements.
Key differentiating features include the XGATE co-processor, a programmable RISC peripheral processor that offloads interrupt handling and I/O tasks from the main CPU, effectively building virtual peripherals and boosting overall system throughput. The device also provides flexible, programmable hardware-emulated EEPROM for calibration and non-volatile storage without an external memory, and a memory protection unit with supervisor/user modes for system integrity.
On the analog side, the integrated ADC delivers 12-bit resolution with a 3 microsecond conversion time, while the peripheral set includes an enhanced capture timer (ECT), periodic interrupt timer (PIT), and real-time interrupt (RTI). Standard serial modules on the S12XE family support CAN, SCI, and SPI connectivity for in-vehicle networks.
Typical applications include automotive body control modules, instrument clusters, HVAC controllers, gateway nodes, and industrial machinery requiring an AEC-Q100 qualified, 5V-tolerant MCU with deterministic response.
When designing with this device, plan Flash and RAM sizing against the 256KB/16KB budget - if code growth is expected, the pin-compatible 384KB and 512KB S12XE variants allow a drop-in upgrade.
This page synthesizes distributor pricing, drop-in alternatives within the S12XE family, and practical design notes not found in a single manufacturer datasheet.
Drop-in alternatives for S912XET256J2MAL — 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 S912XET256J2MAL (same form factor and footprint) — differing in Operating Temperature, Package, Core Processor, EEPROM, Flash Memory.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
S912XET256J2VAG
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →S912XET512J2VAGR
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1 / Unit
View Datasheet →S912XEG384J2VAL
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$17.8 / Unit
View Datasheet →S912XEG256J2CAL
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$15.4 / Unit
View Datasheet →MC9S12XEQ384CAG
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
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View Datasheet →MC9S12XDT256CAG
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$17.4 / Unit
View Datasheet →S912XET256J2MAL Maximum Ratings & Electrical Characteristics
| Core Processor | HCS12X (S12X) |
| Core Size | 16-bit |
| Bus Speed | 50 MHz |
| Flash Memory | 256KB (256K x 8) |
| RAM | 16K x 8 |
| EEPROM | Hardware-emulated (programmable) |
| Co-processor | XGATE RISC |
| ADC Resolution | 12-bit |
| ADC Conversion Time | 3 us |
| Supply Voltage | 1.8V / 2.8V / 5V |
| Operating Temperature | -40C to +125C |
| Package | 112-LQFP (20x20 mm) |
| Mounting Type | Surface Mount |
| Automotive Qualification | AEC-Q100 qualified |
| System Integrity | Memory Protection Unit (MPU), supervisor/user modes |
| Timers | Enhanced Capture Timer (ECT), PIT, RTI |
| Packaging | Tray |
| Lifecycle Status | Active |
S912XET256J2MAL 112-lqfp (20x20 mm) Pin Configuration Guide
Pin configuration for S912XET256J2MAL (112-lqfp (20x20 mm) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for S912XET256J2MAL.
Refer to the datasheet for full pin configuration.
Typical Applications
S912XET256J2MAL is suitable for 6 applications: Automotive Body Control Module, Automotive Instrument Cluster, HVAC Control Module, Industrial Machinery Control, Vehicle Gateway / Network Node, Motor Control and Actuation.
Automotive Body Control Module
The S912XET256J2MAL fits body control modules because it combines AEC-Q100 qualification for -40C to +125C with the XGATE co-processor, which services CAN and load-switching interrupts off the main 50MHz S12X CPU. The 256KB Flash holds body-function firmware plus diagnostic stacks, while hardware-emulated EEPROM stores fault codes and configuration without an external memory. The 12-bit ADC reads switch clusters and analog sensors with 3us conversion time. Placed as the central body controller on a 12V vehicle network, the MSCAN module links door, lighting, and HVAC nodes; the trade-off is that 16-bit processing headroom should be checked against growing UDS diagnostic stack requirements.
Recommended
Automotive Instrument Cluster
Instrument clusters benefit from the S912XET256J2MAL's mix of timer peripherals and analog inputs. The enhanced capture timer (ECT) generates stepper-motor and PWM backlight control for gauge pointers, while the periodic interrupt timer provides deterministic update scheduling for multiplexed displays. The 12-bit, 3us ADC samples fuel level, voltage, and temperature inputs, and hardware-emulated EEPROM retains odometer data across power cycles - a regulatory requirement. Operating at 5V I/O simplifies interfacing to legacy 5V cluster signal chains. The XGATE offloads lamp-bulb diagnostic scanning so the CPU can focus on display rendering and CAN message handling from the powertrain bus.
Recommended
HVAC Control Module
Automotive HVAC controllers use the S912XET256J2MAL for blend-door actuator control, blower PWM generation, and temperature sensing. Its 12-bit ADC with 3us conversion resolves NTC sensor inputs to fine temperature granularity, and the ECT timer produces stepper-motor sequences for air-mix flaps. The AEC-Q100 -40C to +125C rating covers under-dash and engine-bay-adjacent mounting positions. Hardware-emulated EEPROM stores calibration tables and user presets without external memory. XGATE handles the LIN or CAN protocol scheduling, keeping the main CPU free for the control loop. At 50MHz bus speed, closed-loop flap positioning executes comfortably within millisecond control periods.
Recommended
Industrial Machinery Control
In industrial machines, the S912XET256J2MAL offers a 5V-tolerant I/O system and deterministic 16-bit execution well suited to legacy machinery platforms migrated from HC12 devices. The MPU with supervisor/user modes separates safety logic from application code, while hardware-emulated EEPROM holds machine parameters and hour counters. The 12-bit ADC samples pressure and position feedback at 3us per conversion, and the ECT generates PWM for proportional valve drivers. Its AEC-Q100 heritage ensures the extended -40C to +125C range required in factory-floor enclosures. Software reuse from the large HCS12 ecosystem shortens migration effort compared to switching to a 32-bit architecture.
Recommended
Vehicle Gateway / Network Node
As a gateway or sub-network node, the S912XET256J2MAL uses its MSCAN module plus multiple SCI and SPI ports to bridge CAN, LIN, and local serial peripherals. The XGATE co-processor is the key enabler: it buffers and filters CAN frames in hardware-adjacent software, sustaining bus loads that would otherwise burden the main CPU, effectively creating virtual peripherals per NXP's architecture description. The 256KB Flash accommodates routing tables plus diagnostic firmware, and the MPU isolates safety-relevant routing code. The 5V I/O rating tolerates automotive 12V-adjacent signal environments with appropriate transceivers and protection networks.
Recommended
Motor Control and Actuation
The S912XET256J2MAL suits DC motor and actuator control in automotive and industrial equipment. The enhanced capture timer supplies complementary PWM outputs, and the 12-bit ADC with 3us conversion provides current-sense sampling for closed-loop torque or position control at kilohertz rates. The PIT schedules control-loop interrupts deterministically at the 50MHz bus speed, while XGATE handles commutation state machines or fault monitoring concurrently. Hardware-emulated EEPROM saves end-stop calibration and wear counters. Designers should budget the 16-bit ALU carefully for control-law arithmetic, using fixed-point scaling to maintain loop bandwidth within the CPU's throughput envelope.
Recommended
Recommended Products Summary
Engineering reference data for S912XET256J2MAL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | S912XET256J2VAG | S912XET512J2VAGR | S912XEG384J2VAL | MC9S12XEQ384CAG |
|---|---|---|---|---|---|
| Package | 112-LQFP (20x20 mm) | 112-LQFP (20x20 mm) - same | 112-LQFP (20x20 mm) - same | 112-LQFP (20x20 mm) - same | 112-LQFP (20x20 mm) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Flash Memory | 256KB | 256KB | 512KB | 384KB | 384KB |
| Bus Speed | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 50 MHz |
| Core / Co-processor | S12X 16-bit + XGATE | S12X 16-bit + XGATE | S12X 16-bit + XGATE | S12X 16-bit + XGATE | S12X 16-bit + XGATE |
| Temperature Range | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C |
| Automotive Qualification | AEC-Q100 | AEC-Q100 | AEC-Q100 | AEC-Q100 | AEC-Q100 |
| Packaging | Tray | Tape & Reel | Tape & Reel | Tray | Tray |
Key Differentiators
- Upgrade headroom in the same footprint (vs S912XET512J2VAGR)
- Packaging flexibility (vs S912XET256J2VAG)
- Deterministic 5V 16-bit architecture vs 32-bit migration (vs MK21DN512AVLK5)
- XGATE co-processor offload (vs MC9S12XEQ384CAG)
Design Notes
The S912XET256J2MAL runs from a single 5V rail with internal regulator domains at 1.8V (core, VDDR) and 2.8V (Flash/charge pump). Place the required stabilization capacitors on VDDR, VDDA, and VDDX pins as close to the device as possible, per the power section of the S12XE reference manual. Estimate: core current at 50MHz bus is on the order of tens of mA, so total dissipation at 5V is well under the LQFP-112 thermal limit without heatsinking; verify against the datasheet IDD tables for your exact clock configuration.
Flash sizing is the most common failure mode on this part: 256KB fills quickly once a UDS/KWP diagnostic stack and bootloader are added. Plan the memory map with a reserved upgrade path to the pin-compatible S912XET512J2VAGR (512KB) so a silicon swap plus linker-script change suffices. Also, hardware-emulated EEPROM endurance depends on the D-Flash emulation scheme - size your emulation EEPROM block and wear-leveling algorithm per the reference manual, not assuming Flash-like endurance.
XGATE-enabled designs should assign high-frequency interrupt sources (MSCAN receive, ADC conversion-complete) to XGATE threads early in the architecture phase; migrating them later changes vector routing and requires re-verification. Keep crystal routing short and guarded, and route CAN lines with proper common-mode filtering at the transceiver - a TJA-series transceiver with split termination (typically two 62-ohm resistors and a split capacitor) is the standard companion circuit shown in NXP reference designs.
Use the 112-LQFP (20x20 mm) footprint with standard 0.5mm pitch land pattern per the NXP package datasheet; add a continuous ground plane on layer 2 beneath the MCU to reference the analog ADC (VDDA/VRH) domain. Separate analog and digital return paths at a single point near the ADC input filtering network. For AEC-Q100 automotive layouts, follow IPC-A-610 Class 3 assembly criteria and verify the stencil/aperture design for the QFP gull-wing leads.
Compliance Information
Automotive qualified per NXP product page ('Automotive Qualified'). The AL package suffix denotes the lead-free/RoHS-compliant plating option in NXP ordering conventions. Obtain formal RoHS/REACH certificates from the NXP product page Environmental section.
