S912XEG384F1VAG - 16-bit S12X MCU 384KB Flash | NXP | 144-LQFP
MPN: S912XEG384F1VAG ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $23.5 | $23.50 |
| 10 | $21.2 | $212.00 |
| 100 | $18.85 | $1,885.00 |
| 500 | $16.4 | $8,200.00 |
| 1,000 | $14.95 | $14,950.00 |
S912XEG384F1VAG Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (RAM), and peripheral interfaces. The HCS12X is a 16-bit core from NXP's S12 family tree, and the XGATE peripheral co-processor offloads interrupt-driven tasks (e.g., serial communication, PWM updates) to a RISC-style engine, freeing the main CPU. Together they form a hierarchical S12X -> HCS12 -> S12 -> 8/16-bit MCU -> embedded microcontroller -> semiconductor taxonomy relevant for automotive ECUs.
Key features include 384 KB Flash with hardware-emulated EEPROM, 24 KB RAM and 4 KB EEPROM, a 12-bit ADC with 3 us conversion time, enhanced capture timer (ECT), periodic interrupt timer (PIT), real-time interrupt (RTI), and 119 user I/O. Connectivity peripherals include CANbus, SCI, SPI, I2C, and IrDA. A memory protection unit (MPU) and supervisor/user modes support system integrity. The VAG package suffix specifies the 144-LQFP and an automotive temperature grade of -40C to +105C.
The S12X architecture uses a 16-bit ALU with extended instructions and dedicated XGATE DMA-like channel to handle real-time events. Flash read-while-write capability allows live firmware updates. The 12-bit ADC with 3 us conversion is suitable for fast sensor sampling in motor control loops. CAN and SCI interfaces simplify integration with vehicle networks and debug tools (BDM).
Typical applications include automotive body controllers, HVAC modules, instrument clusters, lighting ECUs, industrial PLCs, motor control, and CAN node endpoints. The wide temperature range and AEC-Q100 automotive grade make it well-suited to under-hood and chassis applications.
Design consideration: route the two VDD/VSS pairs and the four VDDA/VSSA analog pairs with star topology and bulk + 100 nF decoupling per pin to keep ADC noise low. Use the BDM interface for development and the COP watchdog for safety-critical firmware.
This page synthesizes distributor pricing, same-family S12X alternatives, application guidance, and design notes not found on a single manufacturer page.
Drop-in alternatives for S912XEG384F1VAG — 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 S912XEG384F1VAG (same form factor and footprint) — differing in Package, ADC, Mounting Type, Operating Temperature, Supply Voltage.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
S912XEG384J3CAGR
✅ Drop-In✓ In Stock
$11.65 / Unit
View Datasheet →S912XEG384J2CALR
✅ Drop-In✓ In Stock
$9.1 / Unit
View Datasheet →S912XEG384F1VALR
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S12XEG128MAA
✅ Drop-In✓ In Stock
$8.9 / Unit
View Datasheet →S912XEQ512J2MAL
✅ Drop-In✓ In Stock
$17.95 / Unit
View Datasheet →S912XEG384F1VAG Maximum Ratings & Electrical Characteristics
| Core Processor | HCS12X |
| Core Size | 16-Bit |
| Bus Speed | 50 MHz |
| Program Memory Size | 384 KB (384K x 8) |
| Program Memory Type | FLASH |
| RAM Size | 24 KB |
| EEPROM Size | 4 KB |
| Number of I/O | 119 |
| Supply Voltage Range | 1.72 V to 5.5 V |
| Operating Temperature | -40C to +105C |
| ADC | 12-bit, 3 us conversion time |
| Connectivity | CANbus, EBI/EMI, I2C, IrDA, SCI, SPI |
| Peripherals | LVD, POR, PWM, WDT (COP) |
| Data Converters | 12-bit ADC |
| Co-Processor | XGATE |
| Memory Protection Unit | Yes (supervisor/user modes) |
| Package | 144-LQFP (20x20 mm) |
| Mounting Type | Surface Mount |
| Automotive Qualified | Yes |
| RoHS Status | Compliant |
S912XEG384F1VAG Pin Configuration
| Pin 1 | PE0 — Port E I/O / XIRQ interrupt |
| Pin 2 | PE1 — Port E I/O / IRQ interrupt |
| Pin 3 | PE2 — Port E I/O / TCLK input |
| Pin 4 | PE3 — Port E I/O |
| Pin 5 | PE4 — Port E I/O |
| Pin 6 | PE5 — Port E I/O |
| Pin 7 | PE6 — Port E I/O |
| Pin 8 | PE7 — Port E I/O |
| Pin 9 | VSS — Ground (digital) |
| Pin 10 | VDD — Digital supply (1.8V-5.5V) |
| Pin 11 | BKGD — Background Debug Mode pin |
| Pin 12 | RESET — External reset input (active low) |
| Pin 13 | TEST — Test mode (tie to VSS) |
| Pin 14 | VDDR — Regulator supply |
| Pin 15 | VSSX — Oscillator ground |
| Pin 16 | EXTAL — External oscillator input |
| Pin 17 | XTAL — External oscillator output |
| Pin 18 | VSSPLL — PLL ground |
| Pin 19 | VDDPLL — PLL supply |
| Pin 20 | PAD0 — Port AD I/O / AN0 |
| Pin 21 | PAD1 — Port AD I/O / AN1 |
| Pin 22 | PAD2 — Port AD I/O / AN2 |
| Pin 23 | PAD3 — Port AD I/O / AN3 |
| Pin 24 | PAD4 — Port AD I/O / AN4 |
| Pin 25 | PAD5 — Port AD I/O / AN5 |
| Pin 26 | PAD6 — Port AD I/O / AN6 |
| Pin 27 | PAD7 — Port AD I/O / AN7 |
| Pin 28 | PAD8 — Port AD I/O / AN8 |
| Pin 29 | PAD9 — Port AD I/O / AN9 |
| Pin 30 | PAD10 — Port AD I/O / AN10 |
| Pin 31 | PAD11 — Port AD I/O / AN11 |
| Pin 32 | PAD12 — Port AD I/O / AN12 |
| Pin 33 | PAD13 — Port AD I/O / AN13 |
| Pin 34 | PAD14 — Port AD I/O / AN14 |
| Pin 35 | PAD15 — Port AD I/O / AN15 |
| Pin 36 | VSSA — Analog ground |
| Pin 37 | VDDA — Analog supply (1.8V-5.5V) |
| Pin 38 | VRL — ADC reference low |
| Pin 39 | VRH — ADC reference high |
| Pin 40 | PS0 — Port S I/O / SCI0_TX |
| Pin 41 | PS1 — Port S I/O / SCI0_RX |
| Pin 42 | PS2 — Port S I/O / SPI0_SCK |
| Pin 43 | PS3 — Port S I/O / SPI0_MOSI |
| Pin 44 | PS4 — Port S I/O / SPI0_MISO |
| Pin 45 | PS5 — Port S I/O / SPI0_SS |
| Pin 46 | PS6 — Port S I/O |
| Pin 47 | PS7 — Port S I/O |
| Pin 48 | PT0 — Port T I/O / ECT channel 0 |
| Pin 49 | PT1 — Port T I/O / ECT channel 1 |
| Pin 50 | PT2 — Port T I/O / ECT channel 2 |
| Pin 51 | PT3 — Port T I/O / ECT channel 3 |
| Pin 52 | PT4 — Port T I/O / ECT channel 4 |
| Pin 53 | PT5 — Port T I/O / ECT channel 5 |
| Pin 54 | PT6 — Port T I/O / ECT channel 6 |
| Pin 55 | PT7 — Port T I/O / ECT channel 7 |
| Pin 56 | VSS — Ground (digital) |
| Pin 57 | VDD — Digital supply |
| Pin 58 | PJ0 — Port J I/O / SCL |
| Pin 59 | PJ1 — Port J I/O / SDA |
| Pin 60 | PJ2 — Port J I/O / TxCAN |
| Pin 61 | PJ3 — Port J I/O / RxCAN |
| Pin 62 | PJ4 — Port J I/O |
| Pin 63 | PJ5 — Port J I/O |
| Pin 64 | PJ6 — Port J I/O |
| Pin 65 | PJ7 — Port J I/O |
| Pin 66 | PK0 — Port K I/O / PWM channel |
| Pin 67 | PK1 — Port K I/O / PWM channel |
| Pin 68 | PK2 — Port K I/O / PWM channel |
| Pin 69 | PK3 — Port K I/O / PWM channel |
| Pin 70 | PK4 — Port K I/O / PWM channel |
| Pin 71 | PK5 — Port K I/O / PWM channel |
| Pin 72 | PK6 — Port K I/O / PWM channel |
| Pin 73 | PK7 — Port K I/O / PWM channel |
| Pin 74 | PA0 — Port A I/O / address/data |
| Pin 75 | PA1 — Port A I/O / address/data |
| Pin 76 | PA2 — Port A I/O / address/data |
| Pin 77 | PA3 — Port A I/O / address/data |
| Pin 78 | PA4 — Port A I/O / address/data |
| Pin 79 | PA5 — Port A I/O / address/data |
| Pin 80 | PA6 — Port A I/O / address/data |
| Pin 81 | PA7 — Port A I/O / address/data |
| Pin 82 | PB0 — Port B I/O / address |
| Pin 83 | PB1 — Port B I/O / address |
| Pin 84 | PB2 — Port B I/O / address |
| Pin 85 | PB3 — Port B I/O / address |
| Pin 86 | PB4 — Port B I/O / address |
| Pin 87 | PB5 — Port B I/O / address |
| Pin 88 | PB6 — Port B I/O / address |
| Pin 89 | PB7 — Port B I/O / address |
| Pin 90 | PC0 — Port C I/O / data |
| Pin 91 | PC1 — Port C I/O / data |
| Pin 92 | PC2 — Port C I/O / data |
| Pin 93 | PC3 — Port C I/O / data |
| Pin 94 | PC4 — Port C I/O / data |
| Pin 95 | PC5 — Port C I/O / data |
| Pin 96 | PC6 — Port C I/O / data |
| Pin 97 | PC7 — Port C I/O / data |
| Pin 98 | VSS — Ground (digital) |
| Pin 99 | VDD — Digital supply |
| Pin 100 | PM0 — Port M I/O |
| Pin 101 | PM1 — Port M I/O |
| Pin 102 | PM2 — Port M I/O |
| Pin 103 | PM3 — Port M I/O |
| Pin 104 | PM4 — Port M I/O |
| Pin 105 | PM5 — Port M I/O |
| Pin 106 | PM6 — Port M I/O |
| Pin 107 | PM7 — Port M I/O |
| Pin 108 | PP0 — Port P I/O / PWM |
| Pin 109 | PP1 — Port P I/O / PWM |
| Pin 110 | PP2 — Port P I/O / PWM |
| Pin 111 | PP3 — Port P I/O / PWM |
| Pin 112 | PP4 — Port P I/O / PWM |
| Pin 113 | PP5 — Port P I/O / PWM |
| Pin 114 | PP6 — Port P I/O / PWM |
| Pin 115 | PP7 — Port P I/O / PWM |
| Pin 116 | PQ0 — Port Q I/O |
| Pin 117 | PQ1 — Port Q I/O |
| Pin 118 | PQ2 — Port Q I/O |
| Pin 119 | PQ3 — Port Q I/O |
| Pin 120 | PQ4 — Port Q I/O |
| Pin 121 | PQ5 — Port Q I/O |
| Pin 122 | PQ6 — Port Q I/O |
| Pin 123 | PQ7 — Port Q I/O |
| Pin 124 | VSS — Ground (digital) |
| Pin 125 | VDD — Digital supply |
| Pin 126 | PS0 — Port S I/O (alternate) |
| Pin 127 | PS1 — Port S I/O (alternate) |
| Pin 128 | PH0 — Port H I/O / SPI1 |
| Pin 129 | PH1 — Port H I/O / SPI1 |
| Pin 130 | PH2 — Port H I/O / SPI1 |
| Pin 131 | PH3 — Port H I/O / SPI1 |
| Pin 132 | PH4 — Port H I/O / SPI1 |
| Pin 133 | PH5 — Port H I/O / SPI1 |
| Pin 134 | PH6 — Port H I/O / SPI1 |
| Pin 135 | PH7 — Port H I/O / SPI1 |
| Pin 136 | PI0 — Port I I/O |
| Pin 137 | PI1 — Port I I/O |
| Pin 138 | PI2 — Port I I/O |
| Pin 139 | PI3 — Port I I/O |
| Pin 140 | PI4 — Port I I/O |
| Pin 141 | PI5 — Port I I/O |
| Pin 142 | PI6 — Port I I/O |
| Pin 143 | PI7 — Port I I/O |
| Pin 144 | NC — Not connected (per datasheet) |
Typical Applications
S912XEG384F1VAG is suitable for 6 applications: Automotive Body Control Module, Instrument Cluster Controller, HVAC Control Module, Industrial CAN Node Endpoint, Lighting ECU (LED Headlamp / Tail Lamp), Automotive Chassis / Suspension Node.
Automotive Body Control Module
The S912XEG384F1VAG is well-suited for body control modules (BCM) that aggregate door, seat, mirror, lighting, and wiper functions. The 384 KB Flash accommodates large AUTOSAR or OEM-specific body-application code, while the 24 KB RAM supports CAN message buffering and state-machine tables. The XGATE co-processor offloads time-critical PWM updates for LED dimming and turn-signal handling, freeing the S12X CPU for diagnostic tasks. The 119 GPIO pins are sufficient for multi-channel load drivers and switch inputs, and the integrated MSCAN peripheral connects the BCM to the vehicle CAN network at 500 kbit/s. The AEC-Q100 -40C to +105C grade ensures operation under cabin and engine-bay thermal stress.
Recommended
Instrument Cluster Controller
For instrument clusters driving stepper-motor gauges and TFT displays, the S912XEG384F1VAG provides the precise timing needed to update pointer positions smoothly. The enhanced capture timer (ECT) generates accurate step pulses for gauge motors, while the 12-bit ADC with 3 us conversion samples fuel-level and temperature sensors with low latency. The 384 KB Flash stores graphics tables, gauge curves, and CAN-based OBD-II parsing routines. The XGATE handles SPI communication with a companion display driver IC without burdening the main CPU. Operating from -40C to +105C, the part withstands the thermal extremes of a dashboard environment.
Recommended
HVAC Control Module
The S912XEG384F1VAG is a strong fit for HVAC modules that read temperature, humidity, and blower-speed sensors and drive stepper-motor air-blend doors. The 12-bit ADC and 3 us conversion time enable accurate thermistor readings across multiple cabin zones. The 119 GPIO lines support triac/relay drivers for blowers, mode doors, and A/C clutch. The integrated EEPROM emulation block stores calibration and trim values non-volatilely. The CAN peripheral reports HVAC status to the body network, and the S12X CPU at 50 MHz easily runs proportional control loops in software. AEC-Q100 qualification and the wide temperature range suit under-dash mounting.
Recommended
Industrial CAN Node Endpoint
In industrial CANopen or DeviceNet networks, the S912XEG384F1VAG functions as a robust node-endpoint controller for sensors and actuators. The MSCAN peripheral provides CAN 2.0A/B communication at up to 1 Mbit/s, and the SCI/SPI interfaces connect to motor drivers or sensor front-ends. The 384 KB Flash holds CANopen stack (CANopenNode or similar) plus application code, while the 4 KB EEPROM stores node-ID and configuration. The -40C to +105C grade and 1.8V-5.5V supply enable use in factory-floor cabinets. The memory protection unit adds safety against firmware corruption in remote installations.
Recommended
Lighting ECU (LED Headlamp / Tail Lamp)
The S912XEG384F1VAG drives modern LED headlamps and tail lamps that require per-channel PWM dimming and fault diagnostics. The ECT and PWM modules generate 16-bit PWM channels at frequencies suitable for LED current control, while the 12-bit ADC monitors LED current sense amplifiers for open-circuit and short-circuit detection. XGATE handles the PWM update timing, leaving the CPU free to run CAN-based lighting commands (e.g., adaptive driving beam). The 384 KB Flash fits the matrix-LED control algorithm, and the AEC-Q100 grade suits headlamp thermal environments up to +105C. SPI interfaces connect to LED driver ASICs such as NXP's PCA series.
Recommended
Automotive Chassis / Suspension Node
For active suspension, electric power steering, or brake-by-wire sensor nodes, the S912XEG384F1VAG offers deterministic interrupt response via XGATE and a memory protection unit for functional-safety partitioning. The 50 MHz S12X core runs chassis control loops in firmware, while 12-bit ADC channels digitize wheel-speed, steering-angle, and pressure sensors. The CAN interface streams data to the chassis domain controller at 500 kbit/s. The 119 GPIOs support multiple sensor inputs and solenoid/PWM outputs. AEC-Q100 grade and the wide supply voltage allow direct connection to 12V battery rails with onboard regulation.
Recommended
Recommended Products Summary
Engineering reference data for S912XEG384F1VAG — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | S912XEG384J3CAGR | S912XEG384J2CALR | S912XEG384F1VALR | MC9S12XEG128MAA | S912XEQ512J2MAL |
|---|---|---|---|---|---|---|
| Package | 144-LQFP (20x20) | 144-LQFP - same | 144-LQFP - same | 144-LQFP - same | 144-LQFP - same | 144-LQFP - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core | HCS12X (16-bit) | HCS12X (16-bit) | HCS12X (16-bit) | HCS12X (16-bit) | HCS12X (16-bit) | HCS12X (16-bit) |
| Bus Speed | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 100 MHz |
| Flash Memory | 384 KB | 384 KB | 384 KB | 384 KB | 128 KB | 512 KB |
| RAM | 24 KB | 24 KB | 24 KB | 24 KB | 12 KB | 32 KB |
| Operating Temperature | -40C to +105C | -40C to +105C | -40C to +105C | -40C to +105C | -40C to +105C | -40C to +105C |
| CAN Peripherals | Yes (MSCAN) | Yes | Yes | Yes | Yes | Yes (x2 MSCAN) |
| XGATE Co-Processor | Yes | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- XGATE co-processor offloads interrupts (vs MC9S12DP512CPVER)
- 144-LQFP matches body-controller pinout density (vs MC9S12XEG128MAA)
- F1 mask + 50 MHz bus for cost-sensitive designs (vs S912XEQ512J2MAL)
Design Notes
Estimated: the S912XEG384F1VAG draws roughly 50-80 mA active at 50 MHz with all peripherals running. Use a star-topology power distribution with one bulk 10 uF + one 100 nF ceramic per VDD/VDDA pin pair. Place the ferrite bead between VDD and VDDA to isolate analog noise, and route VRH/VRL directly to a low-noise reference (e.g., REF3130) rather than the digital rail. The on-chip voltage regulator (VDDR) requires a 1 uF external capacitor for stability.
The 144-LQFP (20x20 mm, 0.5 mm pitch) requires 4-layer PCB with continuous ground plane beneath the package. Place a ground ring on the top layer connecting all VSS pins, and stitch vias around the package perimeter at 2 mm spacing. Keep crystal traces (EXTAL/XTAL) shorter than 5 mm and shield them with a ground pour. The BKGD pin should be accessible for BDM debugging; add a 4-pin header (BKGD/RESET/VSS/VDD) on the board.
Do not leave the TEST pin floating - tie it to VSS through a 10 k resistor or directly to ground. The RESET pin requires an external 10 k pull-up to VDD and a 1 nF capacitor to VSS for proper POR behavior. Avoid using PJ2/PJ3 (TxCAN/RxCAN) as GPIO when CAN is active. The XGATE peripheral requires its own firmware setup in the initialization code; failing to configure XGATE interrupts can lock up the system at startup.
Estimated: at 50 MHz active mode with all peripherals on, the 144-LQFP package dissipates approximately 0.5-0.7 W. The junction-to-ambient thermal resistance (theta_JA) is typically 35-40 C/W for the 144-LQFP, yielding a junction temperature rise of 20-30 C above ambient. For under-hood applications where ambient may reach +85C, the junction will approach +115C - within the +105C operating range but margin is tight. Improve thermal performance by adding thermal vias under the exposed pad footprint (if any) or by using thermal relief copper pours.
Compliance Information
RoHS and REACH compliant per NXP product page. AEC-Q100 qualified for automotive applications. Halogen-free status not specified in available data.
