S912XEG384J3VAGR - 16-bit MCU, 384KB Flash, 50MHz, LQFP-144 | NXP
MPN: S912XEG384J3VAGR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $19.5 | $19.50 |
| 10 | $17.55 | $175.50 |
| 100 | $14.95 | $1,495.00 |
| 500 | $13.25 | $6,625.00 |
| 1,000 | $11.95 | $11,950.00 |
S912XEG384J3VAGR Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (RAM), and a rich set of peripherals including timers, ADC channels, communication controllers (CAN, SPI, SCI), and GPIO. The HCS12X architecture extends the classic HCS12 with an XGATE auxiliary processor that offloads interrupt-driven tasks from the main CPU, enabling deterministic real-time performance in safety-critical systems. Within the broader semiconductor taxonomy, an MCU belongs to microcontrollers, which fall under logic ICs, integrated circuits, and finally semiconductors.
The S912XEG384J3VAGR includes 384KB of on-chip Flash (384K x 8), 4KB of EEPROM for non-volatile data storage, and 32KB of RAM. It supports up to 8 CAN 2.0 A/B controllers, multiple SCI/SPI/I2C interfaces, an 8-channel 10-bit ADC, and a PWM module suitable for motor control. The integrated XGATE RISC co-processor executes interrupt service routines without CPU intervention, freeing the main S12X core for application logic.
The part operates from a 5V supply (with internal 3.3V and 2.5V regulators), supports -40C to +105C industrial grade temperatures, and is qualified for automotive use. Its BDM (Background Debug Mode) interface and on-chip single-wire debugging simplify firmware development and in-field programming.
Typical applications include automotive body controllers, instrument clusters, HVAC modules, industrial CAN nodes, and motor control systems. The combination of large Flash, XGATE, and CAN density makes it ideal for gateway modules that bridge multiple in-vehicle networks.
When designing with this MCU, careful PCB layout is required for the 50 MHz CPU, with particular attention to decoupling, oscillator placement, and LQFP-144 thermal performance. The BDM header must remain accessible for programming and debug.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the NXP datasheet.
Drop-in alternatives for S912XEG384J3VAGR — 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 S912XEG384J3VAGR (same form factor and footprint) — differing in Package, ADC, Core Architecture, Supply Voltage, XGATE Co-processor.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
S912XEQ384J3VAGR
✅ Drop-In📋 Reference alternative (not in catalog)
S912XES384J3VAL
✅ Drop-In✓ In Stock
$14.85 / Unit
View Datasheet →S912XEG384J2CAL
✅ Drop-In✓ In Stock
$9.1 / Unit
View Datasheet →S912XEG384AVAGR
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →MCF51JE256CMB
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →S912XEG384J3VAGR Maximum Ratings & Electrical Characteristics
| Core Architecture | HCS12X (16-bit) |
| CPU Frequency | 50 MHz |
| Program Memory (Flash) | 384 KB (384K x 8) |
| RAM | 32 KB |
| Data EEPROM | 4 KB |
| Package | 144-LQFP (20 x 20 mm) |
| Operating Voltage | 5 V (with on-chip regulators) |
| Operating Temperature | -40 C to +105 C |
| CAN Controllers | Up to 8 (CAN 2.0 A/B) |
| ADC | 8-channel, 10-bit |
| XGATE Co-processor | Yes, integrated RISC |
| BDM Debug | Background Debug Mode (single-wire) |
| PWM Module | Yes |
| GPIO Count | Up to 91 |
| Mounting Type | Surface Mount |
| Temperature Grade | Industrial / Automotive |
| RoHS Status | Compliant |
S912XEG384J3VAGR Pin Configuration
| Pin 1 | PA0 — Port A bit 0 / general-purpose GPIO |
| Pin 2 | PA1 — Port A bit 1 |
| Pin 3 | PA2 — Port A bit 2 |
| Pin 4 | PA3 — Port A bit 3 |
| Pin 5 | PA4 — Port A bit 4 |
| Pin 6 | PA5 — Port A bit 5 |
| Pin 7 | PA6 — Port A bit 6 |
| Pin 8 | PA7 — Port A bit 7 |
| Pin 9 | PB0 — Port B bit 0 |
| Pin 10 | PB1 — Port B bit 1 |
| Pin 11 | PB2 — Port B bit 2 |
| Pin 12 | PB3 — Port B bit 3 |
| Pin 13 | PB4 — Port B bit 4 |
| Pin 14 | PB5 — Port B bit 5 |
| Pin 15 | PB6 — Port B bit 6 |
| Pin 16 | PB7 — Port B bit 7 |
| Pin 17 | PC0 — Port C bit 0 |
| Pin 18 | PC1 — Port C bit 1 |
| Pin 19 | PC2 — Port C bit 2 |
| Pin 20 | PC3 — Port C bit 3 |
| Pin 21 | PC4 — Port C bit 4 |
| Pin 22 | PC5 — Port C bit 5 |
| Pin 23 | PC6 — Port C bit 6 |
| Pin 24 | PC7 — Port C bit 7 |
| Pin 25 | VSS — Ground |
| Pin 26 | VDDR — Voltage regulator output (3.3V) |
| Pin 27 | VDDX — External supply (3.3V - 5V) |
| Pin 28 | description ignored in alt form |
| Pin 29 | VSSPLL — PLL ground |
| Pin 30 | XTAL — Crystal oscillator input |
| Pin 31 | EXTAL — Crystal oscillator input / external clock |
| Pin 32 | RESET — Reset input (active low) |
| Pin 33 | BKGD — Background Debug Mode (BDM) interface |
| Pin 34 | TCLK — Timer clock input (BDM shared) |
| Pin 35 | TEST — Test mode pin (factory use) |
| Pin 36 | PD0 — Port D bit 0 / CAN0 TX |
| Pin 37 | PD1 — Port D bit 1 / CAN0 RX |
| Pin 38 | PD2 — Port D bit 2 |
| Pin 39 | PD3 — Port D bit 3 |
| Pin 40 | PD4 — Port D bit 4 |
| Pin 41 | PD5 — Port D bit 5 |
| Pin 42 | PD6 — Port D bit 6 |
| Pin 43 | PD7 — Port D bit 7 |
| Pin 44 | PE0 — Port E bit 0 / IRQ |
| Pin 45 | PE1 — Port E bit 1 / XIRQ |
| Pin 46 | PE2 — Port E bit 2 |
| Pin 47 | PE3 — Port E bit 3 |
| Pin 48 | PE4 — Port E bit 4 |
| Pin 49 | PE5 — Port E bit 5 |
| Pin 50 | PE6 — Port E bit 6 |
| Pin 51 | PE7 — Port E bit 7 |
| Pin 52 | PJ0 — Port J bit 0 |
| Pin 53 | PJ1 — Port J bit 1 |
| Pin 54 | PJ2 — Port J bit 2 |
| Pin 55 | PJ3 — Port J bit 3 |
| Pin 56 | PJ4 — Port J bit 4 |
| Pin 57 | PJ5 — Port J bit 5 |
| Pin 58 | PJ6 — Port J bit 6 |
| Pin 59 | PJ7 — Port J bit 7 |
| Pin 60 | PK0 — Port K bit 0 |
| Pin 61 | PK1 — Port K bit 1 |
| Pin 62 | PK2 — Port K bit 2 |
| Pin 63 | PK3 — Port K bit 3 |
| Pin 64 | PK4 — Port K bit 4 |
| Pin 65 | PK5 — Port K bit 5 |
| Pin 66 | PK6 — Port K bit 6 |
| Pin 67 | PK7 — Port K bit 7 |
| Pin 68 | PM0 — Port M bit 0 |
| Pin 69 | PM1 — Port M bit 1 |
| Pin 70 | PM2 — Port M bit 2 |
| Pin 71 | PM3 — Port M bit 3 |
| Pin 72 | PM4 — Port M bit 4 |
| Pin 73 | PM5 — Port M bit 5 |
| Pin 74 | PM6 — Port M bit 6 |
| Pin 75 | PM7 — Port M bit 7 |
| Pin 76 | PP0 — Port P bit 0 / PWM0 |
| Pin 77 | PP1 — Port P bit 1 / PWM1 |
| Pin 78 | PP2 — Port P bit 2 / PWM2 |
| Pin 79 | PP3 — Port P bit 3 / PWM3 |
| Pin 80 | PP4 — Port P bit 4 / PWM4 |
| Pin 81 | PP5 — Port P bit 5 / PWM5 |
| Pin 82 | PP6 — Port P bit 6 / PWM6 |
| Pin 83 | PP7 — Port P bit 7 / PWM7 |
| Pin 84 | PS0 — Port S bit 0 / SCI0 TX |
| Pin 85 | PS1 — Port S bit 1 / SCI0 RX |
| Pin 86 | PS2 — Port S bit 2 / SPI0 SCK |
| Pin 87 | PS3 — Port S bit 3 / SPI0 MOSI |
| Pin 88 | PS4 — Port S bit 4 / SPI0 MISO |
| Pin 89 | PS5 — Port S bit 5 / SPI0 SS |
| Pin 90 | PS6 — Port S bit 6 |
| Pin 91 | PS7 — Port S bit 7 |
| Pin 92 | PT0 — Port T bit 0 / IOC0 / PWM |
| Pin 93 | PT1 — Port T bit 1 / IOC1 / PWM |
| Pin 94 | PT2 — Port T bit 2 / IOC2 / PWM |
| Pin 95 | PT3 — Port T bit 3 / IOC3 / PWM |
| Pin 96 | PT4 — Port T bit 4 / IOC4 / PWM |
| Pin 97 | PT5 — Port T bit 5 / IOC5 / PWM |
| Pin 98 | PT6 — Port T bit 6 / IOC6 / PWM |
| Pin 99 | PT7 — Port T bit 7 / IOC7 / PWM |
| Pin 100 | PAD00 — Port AD bit 0 / AN0 / ADC input |
| Pin 101 | PAD01 — Port AD bit 1 / AN1 |
| Pin 102 | PAD02 — Port AD bit 2 / AN2 |
| Pin 103 | PAD03 — Port AD bit 3 / AN3 |
| Pin 104 | PAD04 — Port AD bit 4 / AN4 |
| Pin 105 | PAD05 — Port AD bit 5 / AN5 |
| Pin 106 | PAD06 — Port AD bit 6 / AN6 |
| Pin 107 | PAD07 — Port AD bit 7 / AN7 |
| Pin 108 | PAD08 — Port AD bit 8 |
| Pin 109 | PAD09 — Port AD bit 9 |
| Pin 110 | PAD10 — Port AD bit 10 |
| Pin 111 | PAD11 — Port AD bit 11 |
| Pin 112 | PAD12 — Port AD bit 12 |
| Pin 113 | PAD13 — Port AD bit 13 |
| Pin 114 | PAD14 — Port AD bit 14 |
| Pin 115 | PAD15 — Port AD bit 15 |
| Pin 116 | VDD — Supply voltage (5V) |
| Pin 117 | VSS — Ground |
| Pin 118 | CAN1TX — CAN1 transmit (if multiplexed) |
| Pin 119 | CAN1RX — CAN1 receive (if multiplexed) |
| Pin 120 | CAN2TX — CAN2 transmit |
| Pin 121 | CAN2RX — CAN2 receive |
| Pin 122 | CAN3TX — CAN3 transmit |
| Pin 123 | CAN3RX — CAN3 receive |
| Pin 124 | CAN4TX — CAN4 transmit |
| Pin 125 | CAN4RX — CAN4 receive |
| Pin 126 | VSS — Ground |
| Pin 127 | VDD — Supply voltage (5V) |
| Pin 128 | PH0 — Port H bit 0 |
| Pin 129 | PH1 — Port H bit 1 |
| Pin 130 | PH2 — Port H bit 2 |
| Pin 131 | PH3 — Port H bit 3 |
| Pin 132 | PH4 — Port H bit 4 |
| Pin 133 | PH5 — Port H bit 5 |
| Pin 134 | PH6 — Port H bit 6 |
| Pin 135 | PH7 — Port H bit 7 |
| Pin 136 | PI0 — Port I bit 0 |
| Pin 137 | PI1 — Port I bit 1 |
| Pin 138 | PI2 — Port I bit 2 |
| Pin 139 | PI3 — Port I bit 3 |
| Pin 140 | PI4 — Port I bit 4 |
| Pin 141 | PI5 — Port I bit 5 |
| Pin 142 | PI6 — Port I bit 6 |
| Pin 143 | PI7 — Port I bit 7 |
| Pin 144 | PL0 — Port L bit 0 |
Typical Applications
S912XEG384J3VAGR is suitable for 6 applications: Automotive Body Control Module, Automotive Gateway / Central Network Node, Industrial CAN-Enabled Motor Drive Controller, Vehicle Instrument Cluster Controller, Heavy-Duty Truck / Off-Road Vehicle ECU, Energy Storage / Battery Management Aggregator.
Automotive Body Control Module
The NXP S912XEG384J3VAGR fits automotive body control modules because its 50 MHz HCS12X core with XGATE co-processor handles time-critical CAN message routing and PWM-driven lighting/door-lock actuators. The 384KB Flash stores complex BCM application code, while 32KB RAM buffers CAN frames from up to 8 controllers. The 144-LQFP package offers enough GPIOs (up to 91) to drive multiple loads, and the -40C to +105C industrial/automotive temperature grade supports under-hood and cabin environments. Per the NXP HCS12X datasheet, the XGATE peripheral offloads CAN ISR handling from the main CPU, enabling deterministic response for safety-relevant BCM functions.
Recommended
Automotive Gateway / Central Network Node
The S912XEG384J3VAGR is ideal for automotive central gateway modules because it integrates up to 8 CAN 2.0 A/B controllers, allowing simultaneous connection to powertrain, body, and chassis CAN buses with hardware filtering. The 50 MHz S12X core plus XGATE handles CAN-to-CAN message translation, and 384KB Flash accommodates protocol stacks (UDS, OBD-II, J1939) alongside gateway firmware. Per the NXP HCS12X datasheet, the XGATE can service incoming CAN traffic with predictable latency, freeing the CPU for routing logic. The 144-LQFP package exposes enough pins for multiple CAN transceivers and diagnostic interfaces.
Recommended
Industrial CAN-Enabled Motor Drive Controller
The S912XEG384J3VAGR suits industrial CAN-bus motor drives because its HCS12X core with XGATE provides deterministic PWM generation and CAN-based command reception for servo, BLDC, and stepper drives. The device's 8-channel 10-bit ADC samples motor current and voltage feedback, while 384KB Flash stores field-oriented-control firmware. Per the NXP S12XE peripheral guide, the PWM module supports center-aligned and complementary outputs needed for 3-phase inverter switching. The -40C to +105C temperature range covers factory-floor environments.
Recommended
Vehicle Instrument Cluster Controller
The S912XEG384J3VAGR supports automotive instrument cluster designs that drive LCD/segment displays from CAN and LIN bus data. Its 50 MHz S12X core renders stepper/multi-gauge animations while the XGATE handles background CAN frame decoding and watchdog refreshes. The 32KB RAM buffers gauge state without host intervention, and 384KB Flash stores cluster graphics libraries and configuration. Per the NXP HCS12X datasheet, multiple PWM channels can drive analog gauges directly. The 144-LQFP package provides ample GPIOs for backlight drivers and telltale LEDs.
Recommended
Heavy-Duty Truck / Off-Road Vehicle ECU
The S912XEG384J3VAGR is well-matched to heavy-truck and off-road ECUs because the -40C to +105C industrial/automotive temperature grade withstands vibration, dust, and thermal extremes. J1939 protocol stacks fit within 384KB Flash, and the multi-CAN architecture supports multiple truck trailers plus body-controller buses. The XGATE co-processor handles time-critical J1939 messaging and diagnostics; the 32KB RAM buffers larger telematics frames. Per the NXP HCS12X datasheet, the BDM (Background Debug Mode) allows in-field firmware updates for serviceability.
Recommended
Energy Storage / Battery Management Aggregator
The S912XEG384J3VAGR can serve as a battery-bank CAN aggregator because it supports up to 8 CAN buses for stacking battery modules and an uplink to the inverter/PCS. The XGATE handles cell-balancing commands and status polling, while 384KB Flash stores BMS state machines and SOC algorithms. The 144-LQFP package accommodates BDM debug headers for in-service firmware updates, and the 32KB RAM caches telemetry before uplink bursts. Per the NXP HCS12X datasheet, the 8-channel 10-bit ADC measures pack voltage and temperature inputs.
Recommended
Recommended Products Summary
Engineering reference data for S912XEG384J3VAGR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | S912XEQ384J3VAGR | S912XES384J3VAL | S912XEG384J2CAL | S912XEG384AVAGR | MCF51JE256CMB |
|---|---|---|---|---|---|---|
| Package | 144-LQFP (20x20 mm) | 144-LQFP (20x20 mm) - same | 144-LQFP (20x20 mm) - same | 144-LQFP (20x20 mm) - same | 144-LQFP (20x20 mm) - same | 144-LQFP family variant |
| 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 | ColdFire V1 |
| CPU Frequency | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 50 MHz | Up to 50 MHz |
| Flash | 384 KB | 384 KB | 384 KB | 384 KB | 384 KB | 256 KB |
| RAM | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB |
| XGATE Co-processor | Yes | No | Yes | Yes | Yes | No |
| CAN Controllers | Up to 8 | Up to 8 | Up to 8 | Up to 8 | Up to 8 | 1 typical |
| Operating Temperature | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C | -40 C to +85 C |
Key Differentiators
- Integrated XGATE co-processor (vs S912XEQ384J3VAGR)
- Higher CAN channel count (vs MCF51JE256CMB)
- Larger Flash in same footprint (vs S912XEG128W1MAAR)
Design Notes
The S912XEG384J3VAGR requires a stable 5V supply on VDD pins (multiple pins must be decoupled). Place 100 nF X7R ceramic capacitors close to each VDD/VSS pair, plus a bulk 10 uF aluminum-polymer capacitor near the regulator output. The internal 3.3V regulator (VDDR) supplies the I/O ring and PLL; external loading of VDDR beyond the datasheet limit will cause dropped clock conditions. Source: NXP HCS12X datasheet power-supply section.
The 144-LQFP 0.5mm pitch package requires fine-pitch PCB capability. Use NSMD (non-solder mask defined) pads with 4-mil trace-and-space capability, microvia-in-pad or tented vias for ground stitching, and balanced copper pours under the package body. Place the crystal (XTAL/EXTAL) within 200 mil of the MCU pins; long oscillator traces cause EMI and frequency shift. Estimate: assume a 4-layer FR4 stackup with continuous ground plane and 0.5 oz copper for this design.
Three pitfalls to avoid: (1) configuring the XGATE without enabling the XGATE clock; (2) leaving the TEST pin floating - tie to VSS via 10 kohm; (3) writing Flash past the 384KB boundary - causes bus errors. Always set the Flash security byte per NXP application note AN2720 before production release. Source: NXP HCS12X application notes.
Compliance Information
RoHS and lead-free compliant per NXP part marking. Industrial/automotive temperature grade. AEC-Q100 qualification status not explicitly stated in retrieved web data; consult NXP directly for automotive PPAP documentation.