S912XEG384J2VAL - 16-bit 50MHz 384KB Flash MCU | NXP
MPN: S912XEG384J2VAL ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $24.5 | $24.50 |
| 10 | $22.8 | $228.00 |
| 100 | $20.9 | $2,090.00 |
| 500 | $19.2 | $9,600.00 |
| 1,000 | $17.8 | $17,800.00 |
S912XEG384J2VAL Overview
A 16-bit MCU of this class combines a CISC processor core, on-chip nonvolatile memory, analog peripherals and communication interfaces in a single chip, sitting within the microcontroller hierarchy between simple 8-bit MCUs and 32-bit automotive processors. NXP's HCS12X family is a direct descendant of the widely deployed HC12/S12 architecture, making it a mainstay of body, chassis and powertrain electronics.
Key features include the XGATE co-processor, which offloads interrupt handling and I/O routines to effectively build virtual peripherals and multiply overall system throughput. A flexible, programmable hardware-emulated EEPROM in Flash eliminates the need for a separate EEPROM device. A memory protection unit with supervisor and user modes supports system integrity for safety-oriented designs.
Technical depth: the S12X CPU runs at 50MHz bus speed, and the enhanced ADC achieves 12-bit resolution with a 3 microsecond conversion time. Peripheral set includes the Enhanced Capture Timer (ECT), Periodic Interrupt Timer (PIT), Real Time Interrupt (RTI), SCI serial interfaces, and an integrated temperature sensor. Supply options cover 1.8V, 2.8V and 5V domains per distribution listings, with operation from -40C to +105C for automotive environments.
Typical applications include automotive body control modules, gateway nodes, instrument clusters and industrial control systems that require high Flash density plus deterministic 16-bit real-time behavior.
Design consideration: since NXP marks this part No Longer Manufactured, new designs should evaluate lifecycle risk and plan a last-time-buy or map to a successor before committing to new PCB layouts.
This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for S912XEG384J2VAL — 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 S912XEG384J2VAL (same form factor and footprint) — differing in Package, Operating Temperature, Supply Voltage, ADC, Core.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC9S12XEQ384VAL
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MC9S12XEP100VAL
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
S912XET256VAL
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
S912XEG128VAL
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MC9S12XEG384J2VAGR
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
S912XEG384J2VAL Maximum Ratings & Electrical Characteristics
| Core | S12X (HCS12X), 16-bit CISC |
| Co-processor | XGATE |
| Bus Clock Frequency | 50 MHz |
| Flash Memory | 384 KB (384K x 8) |
| EEPROM Emulation | Programmable hardware-emulated EEPROM in Flash |
| ADC Resolution | 12-bit |
| ADC Conversion Time | 3 us |
| Operating Temperature | -40C to +105C |
| Qualification | Automotive Qualified |
| Timers | Enhanced Capture Timer (ECT), Periodic Interrupt Timer (PIT), Real Time Interrupt (RTI) |
| Serial Interfaces | SCI |
| Memory Protection | MPU with supervisor/user modes |
| Temperature Sensor | Integrated on-chip |
| Package | 112-LQFP (20x20 mm) |
| Mounting Type | Surface Mount |
| Terminal Form | Gull Wing |
| Supply Domains | 1.8 V / 2.8 V / 5 V |
| Lifecycle Status | No Longer Manufactured (NXP) |
S912XEG384J2VAL 112-lqfp (20x20 mm) Pin Configuration Guide
Pin configuration for S912XEG384J2VAL (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 S912XEG384J2VAL.
Refer to the datasheet for full pin configuration.
Typical Applications
S912XEG384J2VAL is suitable for 6 applications: Automotive Body Control Modules, Vehicle Gateway Nodes, Instrument Clusters, Industrial Control Systems, Motor Control and Actuator Drivers, Telematics and Sensor Hubs.
Automotive Body Control Modules
Body control modules (BCMs) coordinate lighting, door locks, wipers and window motors using dozens of digital I/O and timed functions. The S912XEG384J2VAL fits this role with its Enhanced Capture Timer (ECT) for accurate pulse measurement and generation, XGATE co-processor for concurrent I/O servicing, and 384KB Flash that holds full body-electronics firmware plus calibration. The -40C to +105C automotive qualification and MPU-based supervisor/user protection address the harsh, safety-relevant environment. EEPROM emulation stores fault logs and learned configurations across power cycles. Designers should size last-time-buy quantities since NXP lists the part No Longer Manufactured; same-package S12XE variants allow footprint-neutral migration.
Recommended
Vehicle Gateway Nodes
In-vehicle gateways bridge multiple in-car networks and need deterministic real-time response plus substantial code space for protocol stacks. The S912XEG384J2VAL's XGATE co-processor runs interrupt-driven communication routines in parallel with the 50MHz S12X main CPU, effectively multiplying throughput for message routing. The 384KB Flash accommodates diagnostic layers and multiple protocol handlers, while EEPROM emulation retains network configuration data. The memory protection unit with supervisor and user modes supports the system-integrity requirements of gateway firmware. With SCI serial interfaces and automotive-qualified temperature range, it suits existing platform designs; new gateway projects should weigh the EOL status and plan migration to a successor MCU family.
Recommended
Instrument Clusters
Instrument clusters require analog acquisition of sensor inputs (fuel level, temperature, battery voltage) and precise timing for gauges and warning indicators. The S912XEG384J2VAL provides a 12-bit ADC with 3 microsecond conversion time, fast enough for oversampled, noise-filtered readings of resistive sender inputs, and an on-chip temperature sensor for compensation and diagnostics. The Enhanced Capture Timer drives stepper motors and PWM backlighting, while the Periodic Interrupt Timer and Real Time Interrupt support service-interval counting and timekeeping. The 384KB Flash stores graphics look-up tables and multi-language strings. Its -40C to +105C automotive rating covers the cabin-and-engine-bay spread, and XGATE offloads display multiplexing from the main control loop.
Recommended
Industrial Control Systems
Industrial controllers benefit from the S912XEG384J2VAL's combination of 5V-tolerant I/O, deterministic 16-bit real-time behavior and on-chip analog. The 12-bit ADC digitizes transducer signals at 3 microsecond conversion for closed-loop control, and the ECT handles encoder and event-capture timing. SCI interfaces connect to HMIs and field devices, while the 384KB Flash supports substantial control logic and parameter sets. EEPROM emulation stores recipe and calibration data without an external serial EEPROM, improving reliability in vibration-prone environments. The hardware MPU separates bootloader from application code. Note the part is No Longer Manufactured at NXP; for new industrial designs, either secure aftermarket supply via Rochester-sourced stock or design in a same-package S12XE variant.
Recommended
Motor Control and Actuator Drivers
DC motor and actuator control demands fast, periodic ADC sampling and precise PWM timing. The S912XEG384J2VAL's 12-bit ADC with 3us conversion supports current-sense feedback at multi-kHz control-loop rates, and the Enhanced Capture Timer provides fault input capture for overcurrent protection responses. XGATE can service PWM update and protection interrupts independently, keeping loop jitter low even while the main CPU runs supervisory logic. The 50MHz bus gives adequate headroom for field-oriented or cascade control structures in 16-bit arithmetic. Its automotive qualification suits actuator modules such as throttle, headlight leveling and HVAC dampers. Use the temperature sensor to derate drive stages as ambient temperature climbs within the -40C to +105C range.
Recommended
Telematics and Sensor Hubs
Telematics and sensor-hub nodes aggregate data from multiple analog and digital sources before forwarding it over serial links. The S912XEG384J2VAL combines a 12-bit ADC, on-chip temperature sensor, and SCI interfaces to collect and package sensor data, while XGATE handles buffering and protocol framing concurrently with the main CPU's data processing. The 384KB Flash supports substantial data-logging and diagnostics code, and hardware-emulated EEPROM preserves configuration and event history through power loss. Automotive qualification and the MPU make it robust for under-hood and chassis-mounted hubs. Because NXP discontinued the part, telematics platforms using it should verify aftermarket stock (Rochester Electronics channels) and qualify a same-package S12XE successor before the next build cycle.
Recommended
Recommended Products Summary
Engineering reference data for S912XEG384J2VAL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC9S12XEQ384VAL | MC9S12XEP100VAL | S912XET256VAL | S912XEG128VAL | MC9S12XEG384J2VAGR |
|---|---|---|---|---|---|---|
| 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 | 112-LQFP (20x20 mm) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Flash Memory | 384 KB | 384 KB | 100 KB | 256 KB | 128 KB | 384 KB |
| Core / Bus Speed | S12X @ 50 MHz | S12X @ 50 MHz | S12X @ 50 MHz | S12X @ 50 MHz | S12X @ 50 MHz | S12X @ 50 MHz |
| XGATE Co-processor | Yes | Yes | Yes | Yes | Yes | Yes |
| ADC | 12-bit, 3 us conversion | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit, 3 us conversion |
| Lifecycle Status | No Longer Manufactured (NXP) | EOL - aftermarket via Rochester | EOL - aftermarket via Rochester | EOL - aftermarket via Rochester | EOL - aftermarket via Rochester | EOL - aftermarket via Rochester |
Key Differentiators
- Full 384KB Flash in the 112-LQFP footprint (vs MC9S12XEP100VAL)
- Automotive qualification with -40C to +105C range (vs S912XET256VAL)
- XGATE concurrency without a second MCU (vs S912XEG128VAL)
Design Notes
The dominant risk with this MPN is lifecycle, not electrical. NXP lists S912XEG384J2VAL as No Longer Manufactured, so remaining stock is finite and counterfeit risk rises in the gray market. For production continuity, source only from authorized or traceable channels (Rochester Electronics aftermarket, remaining DigiKey/Mouser stock) and document a migration path to a same-package S12XE variant. Verify EEPROM-emulation data retention requirements against your firmware's write endurance budget before any die-shrink or variant swap.
Design the 5V rail for the classic HCS12X operating point while respecting the listed 1.8V/2.8V/5V domain structure - regulator selection must handle Flash program/erase current bursts during EEPROM emulation writes. Place a 0.1uF ceramic capacitor at each VDD pin pair plus one bulk 10uF per supply domain, as recommended across S12XE reference designs. Ensure the reset supervisor holds reset until the 5V rail is stable, since Flash-emulated EEPROM init at power-up depends on a clean supply.
For the 112-LQFP 20x20 mm footprint, allocate a solid ground plane under the device and short-return the ADC reference; the 12-bit ADC (3 us conversion) needs a quiet VREFH to hit its resolution. Route crystal and RTI circuits away from high dV/dt traces. Use gull-wing land patterns per the 20x20 mm LQFP footprint drawing in the family reference manual, and add thermal vias only if rework access allows. Keep SCI/communication lines length-matched where they leave the module.
Compliance Information
Distributor listings (DigiKey, Mouser, FindIC) state Automotive Qualified, -40/+105C. RoHS/REACH/lead-free status was not explicitly stated in the captured web data; verify via NXP product page or compliance certificate request.
