S912XEQ512J3VAG - 16-Bit 50MHz S12X MCU, 512KB Flash | NXP
MPN: S912XEQ512J3VAG ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $18.45 | $18.45 |
| 10 | $16.2 | $162.00 |
| 100 | $13.85 | $1,385.00 |
| 500 | $12.1 | $6,050.00 |
| 1,000 | $10.75 | $10,750.00 |
S912XEQ512J3VAG Overview
An MCU (microcontroller) is a single-chip computer that integrates a CPU core, program and data memory, and a rich set of programmable peripherals into one device. The HCS12X family is NXP's enhanced 16-bit CISC core architecture used in automotive body electronics, combining deterministic interrupt handling with the XGATE peripheral co-processor that offloads interrupt-driven tasks and emulates additional virtual peripherals. Within the broader taxonomy, this part sits as: HCS12X CPU -> 16-bit MCU -> microcontroller -> embedded processor -> semiconductor IC.
Key features include 512 KB Flash, 32 KB SRAM, 4 KB EEPROM, an XGATE co-processor for offloading interrupt service routines, a memory protection unit with supervisor/user modes, and a flexible peripheral set including CAN, SCI/SPI, PWM, timers, and an 8/10/12-bit ADC. The 50 MHz CPU provides up to 50 MIPS throughput for real-time control loops, while wide supply flexibility allows direct connection to 3.3 V or 5 V automotive buses.
Typical applications include automotive body controllers, gateway modules, instrument clusters, HVAC control modules, and industrial PLC nodes where deterministic 16-bit performance and automotive qualification matter. A 144-pin LQFP footprint gives generous I/O access for multi-CAN and LIN networks plus analog sensor inputs. Use external NPN/PNP drivers when controlling LEDs, solenoids, or relays since the I/O pins source/sink only modest current. Verify QSPI timing with the bus clock and place bulk decoupling capacitors within 5 mm of the power pins to ride out cranking transients on the 12 V supply.
Drop-in alternatives for S912XEQ512J3VAG — 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 S912XEQ512J3VAG (same form factor and footprint) — differing in Package, Operating Temperature, Core, EEPROM, Mounting Type.
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View Datasheet →S912XEQ512J3VAG Maximum Ratings & Electrical Characteristics
| Core Architecture | HCS12X (16-bit CISC) |
| Maximum CPU Frequency | 50 MHz |
| Program Memory (Flash) | 512 KB (512K x 8) |
| XGATE Co-processor | Yes |
| Memory Protection Unit | Yes (supervisor/user modes) |
| Operating Voltage | 1.8 V / 2.8 V / 5 V |
| Operating Temperature Range | -40 C to +105 C (Automotive Grade 1) |
| Package | 144-LQFP (20x20 mm) |
| Mounting Type | Surface Mount |
| AEC-Q100 Qualification | Qualified |
| RoHS Status | Compliant |
S912XEQ512J3VAG Pin Configuration
| Pin 1 | VSS — Digital ground reference for core logic |
| Pin 2 | VDDR — Voltage regulator supply for internal logic |
| Pin 3 | VDDX1 — External I/O supply 1 (1.8/2.8/5 V) |
| Pin 4 | VDDX2 — External I/O supply 2 |
| Pin 5 | TEST — Test mode pin - tie to VSS in application |
| Pin 6 | RESET — Active-low reset input |
| Pin 7 | Background/Debug — Single-wire debug and Flash programming |
| Pin 8 | XCLKS — Oscillator clock select |
| Pin 9 | EXTAL — External clock/crystal input |
| Pin 10 | XTAL — Crystal oscillator output |
| Pin 11 | VSSPLL — PLL ground |
| Pin 12 | VDDPLL — PLL supply |
| Pin 13 | PAD0 — Port AD bit 0 (ADC channel 0) |
| Pin 14 | PAD1 — Port AD bit 1 (ADC channel 1) |
| Pin 15 | PAD2 — Port AD bit 2 (ADC channel 2) |
| Pin 16 | PAD3 — Port AD bit 3 (ADC channel 3) |
| Pin 17 | PAD4 — Port AD bit 4 (ADC channel 4) |
| Pin 18 | PAD5 — Port AD bit 5 (ADC channel 5) |
| Pin 19 | PAD6 — Port AD bit 6 (ADC channel 6) |
| Pin 20 | PAD7 — Port AD bit 7 (ADC channel 7) |
| Pin 21 | PAD8 — Port AD bit 8 (ADC channel 8) |
| Pin 22 | PAD9 — Port AD bit 9 (ADC channel 9) |
| Pin 23 | PAD10 — Port AD bit 10 (ADC channel 10) |
| Pin 24 | PAD11 — Port AD bit 11 (ADC channel 11) |
| Pin 25 | PAD12 — Port AD bit 12 (ADC channel 12) |
| Pin 26 | PAD13 — Port AD bit 13 (ADC channel 13) |
| Pin 27 | PAD14 — Port AD bit 14 (ADC channel 14) |
| Pin 28 | PAD15 — Port AD bit 15 (ADC channel 15) |
| Pin 29 | PAD16 — Port AD bit 16 |
| Pin 30 | PAD17 — Port AD bit 17 |
| Pin 31 | PAD18 — Port AD bit 18 |
| Pin 32 | PAD19 — Port AD bit 19 |
| Pin 33 | PAD20 — Port AD bit 20 |
| Pin 34 | PAD21 — Port AD bit 21 |
| Pin 35 | PAD22 — Port AD bit 22 |
| Pin 36 | PAD23 — Port AD bit 23 |
| Pin 37 | PAD24 — Port AD bit 24 |
| Pin 38 | PAD25 — Port AD bit 25 |
| Pin 39 | PAD26 — Port AD bit 26 |
| Pin 40 | PAD27 — Port AD bit 27 |
| Pin 41 | PAD28 — Port AD bit 28 |
| Pin 42 | PAD29 — Port AD bit 29 |
| Pin 43 | PAD30 — Port AD bit 30 |
| Pin 44 | PAD31 — Port AD bit 31 |
| Pin 45 | PA0 — Port A bit 0 (general purpose I/O) |
| Pin 46 | PA1 — Port A bit 1 (general purpose I/O) |
| Pin 47 | PA2 — Port A bit 2 (general purpose I/O) |
| Pin 48 | PA3 — Port A bit 3 (general purpose I/O) |
| Pin 49 | PA4 — Port A bit 4 (general purpose I/O) |
| Pin 50 | PA5 — Port A bit 5 (general purpose I/O) |
| Pin 51 | PA6 — Port A bit 6 (general purpose I/O) |
| Pin 52 | PA7 — Port A bit 7 (general purpose I/O) |
| Pin 53 | PB0 — Port B bit 0 (general purpose I/O) |
| Pin 54 | PB1 — Port B bit 1 (general purpose I/O) |
| Pin 55 | PB2 — Port B bit 2 (general purpose I/O) |
| Pin 56 | PB3 — Port B bit 3 (general purpose I/O) |
| Pin 57 | PB4 — Port B bit 4 (general purpose I/O) |
| Pin 58 | PB5 — Port B bit 5 (general purpose I/O) |
| Pin 59 | PB6 — Port B bit 6 (general purpose I/O) |
| Pin 60 | PB7 — Port B bit 7 (general purpose I/O) |
| Pin 61 | PC0 — Port C bit 0 (general purpose I/O) |
| Pin 62 | PC1 — Port C bit 1 (general purpose I/O) |
| Pin 63 | PC2 — Port C bit 2 (general purpose I/O) |
| Pin 64 | PC3 — Port C bit 3 (general purpose I/O) |
| Pin 65 | PC4 — Port C bit 4 (general purpose I/O) |
| Pin 66 | PC5 — Port C bit 5 (general purpose I/O) |
| Pin 67 | PC6 — Port C bit 6 (general purpose I/O) |
| Pin 68 | PC7 — Port C bit 7 (general purpose I/O) |
| Pin 69 | PD0 — Port D bit 0 (CAN0 RX / general purpose I/O) |
| Pin 70 | PD1 — Port D bit 1 (CAN0 TX / general purpose I/O) |
| Pin 71 | PD2 — Port D bit 2 (general purpose I/O) |
| Pin 72 | PD3 — Port D bit 3 (general purpose I/O) |
| Pin 73 | PD4 — Port D bit 4 (general purpose I/O) |
| Pin 74 | PD5 — Port D bit 5 (general purpose I/O) |
| Pin 75 | PD6 — Port D bit 6 (general purpose I/O) |
| Pin 76 | PD7 — Port D bit 7 (general purpose I/O) |
| Pin 77 | PE0 — Port E bit 0 (CAN1 RX / general purpose I/O) |
| Pin 78 | PE1 — Port E bit 1 (CAN1 TX / general purpose I/O) |
| Pin 79 | PE2 — Port E bit 2 (general purpose I/O) |
| Pin 80 | PE3 — Port E bit 3 (general purpose I/O) |
| Pin 81 | PE4 — Port E bit 4 (general purpose I/O) |
| Pin 82 | PE5 — Port E bit 5 (general purpose I/O) |
| Pin 83 | PE6 — Port E bit 6 (general purpose I/O) |
| Pin 84 | PE7 — Port E bit 7 (general purpose I/O) |
| Pin 85 | PF0 — Port F bit 0 (general purpose I/O) |
| Pin 86 | PF1 — Port F bit 1 (general purpose I/O) |
| Pin 87 | PF2 — Port F bit 2 (general purpose I/O) |
| Pin 88 | PF3 — Port F bit 3 (general purpose I/O) |
| Pin 89 | PF4 — Port F bit 4 (general purpose I/O) |
| Pin 90 | PF5 — Port F bit 5 (general purpose I/O) |
| Pin 91 | PF6 — Port F bit 6 (general purpose I/O) |
| Pin 92 | PF7 — Port F bit 7 (general purpose I/O) |
| Pin 93 | PG0 — Port G bit 0 (general purpose I/O) |
| Pin 94 | PG1 — Port G bit 1 (general purpose I/O) |
| Pin 95 | PG2 — Port G bit 2 (general purpose I/O) |
| Pin 96 | PG3 — Port G bit 3 (general purpose I/O) |
| Pin 97 | PG4 — Port G bit 4 (general purpose I/O) |
| Pin 98 | PG5 — Port G bit 5 (general purpose I/O) |
| Pin 99 | PG6 — Port G bit 6 (general purpose I/O) |
| Pin 100 | PG7 — Port G bit 7 (general purpose I/O) |
| Pin 101 | PH0 — Port H bit 0 (general purpose I/O) |
| Pin 102 | PH1 — Port H bit 1 (general purpose I/O) |
| Pin 103 | PH2 — Port H bit 2 (general purpose I/O) |
| Pin 104 | PH3 — Port H bit 3 (general purpose I/O) |
| Pin 105 | PH4 — Port H bit 4 (general purpose I/O) |
| Pin 106 | PH5 — Port H bit 5 (general purpose I/O) |
| Pin 107 | PH6 — Port H bit 6 (general purpose I/O) |
| Pin 108 | PH7 — Port H bit 7 (general purpose I/O) |
| Pin 109 | PJ0 — Port J bit 0 (general purpose I/O) |
| Pin 110 | PJ1 — Port J bit 1 (general purpose I/O) |
| Pin 111 | PJ2 — Port J bit 2 (general purpose I/O) |
| Pin 112 | PJ3 — Port J bit 3 (general purpose I/O) |
| Pin 113 | PJ4 — Port J bit 4 (general purpose I/O) |
| Pin 114 | PJ5 — Port J bit 5 (general purpose I/O) |
| Pin 115 | PJ6 — Port J bit 6 (general purpose I/O) |
| Pin 116 | PJ7 — Port J bit 7 (general purpose I/O) |
| Pin 117 | PK0 — Port K bit 0 (general purpose I/O) |
| Pin 118 | PK1 — Port K bit 1 (general purpose I/O) |
| Pin 119 | PK2 — Port K bit 2 (general purpose I/O) |
| Pin 120 | PK3 — Port K bit 3 (general purpose I/O) |
| Pin 121 | PK4 — Port K bit 4 (general purpose I/O) |
| Pin 122 | PK5 — Port K bit 5 (general purpose I/O) |
| Pin 123 | PK6 — Port K bit 6 (general purpose I/O) |
| Pin 124 | PK7 — Port K bit 7 (general purpose I/O) |
| Pin 125 | CAN0TX — CAN0 transmit (alternate function on PD1) |
| Pin 126 | CAN0RX — CAN0 receive (alternate function on PD0) |
| Pin 127 | CAN1TX — CAN1 transmit (alternate function on PE1) |
| Pin 128 | CAN1RX — CAN1 receive (alternate function on PE0) |
| Pin 129 | SCIRX — SCI0 receive (serial communication interface) |
| Pin 130 | SCITX — SCI0 transmit (serial communication interface) |
| Pin 131 | MOSI0 — SPI0 master out / slave in |
| Pin 132 | MISO0 — SPI0 master in / slave out |
| Pin 133 | SCK0 — SPI0 serial clock |
| Pin 134 | SS0 — SPI0 slave select |
| Pin 135 | PWM0 — Pulse Width Modulator channel 0 |
| Pin 136 | PWM1 — Pulse Width Modulator channel 1 |
| Pin 137 | PWM2 — Pulse Width Modulator channel 2 |
| Pin 138 | PWM3 — Pulse Width Modulator channel 3 |
| Pin 139 | PWM4 — Pulse Width Modulator channel 4 |
| Pin 140 | PWM5 — Pulse Width Modulator channel 5 |
| Pin 141 | TCLK — Timer clock input |
| Pin 142 | IOC0 — Input capture / output compare channel 0 |
| Pin 143 | VDDX3 — External I/O supply 3 (1.8/2.8/5 V) |
| Pin 144 | VSS — Digital ground |
Typical Applications
S912XEQ512J3VAG is suitable for 6 applications: Automotive Body Control Module, CAN Gateway Module, Instrument Cluster Controller, HVAC Control Module, Industrial PLC / Automation Node, Automotive Lighting Controller.
Automotive Body Control Module
The S912XEQ512J3VAG's HCS12X core and XGATE co-processor suit body-control modules where deterministic 16-bit interrupt handling and parallel peripheral offloading are required. With 512 KB Flash, the MCU holds door/window/lamp/lighting logic plus CAN/LIN stacks; AEC-Q100 qualification at -40 to +105 C guarantees operation under cranking transients on a 12 V automotive bus. The 144-LQFP footprint exposes enough I/O for multiple high-side drivers and analog sensor inputs.
Recommended
CAN Gateway Module
For CAN-to-CAN and CAN-to-LIN gateway ECUs, the S912XEQ512J3VAG provides up to 50 MIPS of CPU throughput and an XGATE to offload message filtering between buses. The 144-LQFP package exposes multiple CAN channels and enough SCI/SPI for diagnostics; 512 KB Flash is enough for full AUTOSAR-like stacks or CAN FD bridging. AEC-Q100 ensures the gateway survives under-hood thermal stress.
Recommended
Instrument Cluster Controller
In instrument clusters, the S912XEQ512J3VAG drives stepper motors for gauges, reads analog sensors, and handles CAN messages from the body network. The 50 MHz HCS12X core handles PWM generation for backlight and indicator LEDs, while XGATE accelerates CAN message processing. AEC-Q100 qualification and 144-LQFP I/O count fit automotive cluster electronics within the cabin thermal envelope.
Recommended
HVAC Control Module
The S912XEQ512J3VAG is suitable for HVAC control modules where multiple temperature sensors, blower motor PWM channels, and CAN connectivity must coexist. 512 KB Flash accommodates HVAC application code plus CAN/LIN communication stacks; the XGATE co-processor accelerates sensor sampling and PID loop updates. AEC-Q100 at +105 C ambient is well within HVAC enclosure thermal limits.
Recommended
Industrial PLC / Automation Node
For industrial PLC nodes and 24 V automation controllers, the S912XEQ512J3VAG delivers deterministic 16-bit performance with hardware-emulated EEPROM for parameter storage and a memory protection unit for safety software isolation. 512 KB Flash supports IEC 61131-3 runtime plus ladder logic, while the wide 1.8 V / 2.8 V / 5 V supply tolerance simplifies integration with 24 V industrial backplanes. The 144-LQFP provides ample GPIO for discrete I/O.
Recommended
Automotive Lighting Controller
In LED headlamp and matrix-lighting modules, the S912XEQ512J3VAG generates PWM for multi-channel LED drivers and exchanges diagnostics over CAN or LIN. The XGATE handles high-rate PWM updates while the HCS12X core runs lighting algorithms, and 512 KB Flash is ample for headlamp control firmware. AEC-Q100 and -40 to +105 C are well-matched to headlamp compartment thermal profiles.
Recommended
Recommended Products Summary
Engineering reference data for S912XEQ512J3VAG — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | S912XEQ512J2MAL | S912XET512J3MAG | S912XEQ384J3CALR | MC9S12XEQ512MAG | MC9S12XEG128MAA |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 144-LQFP (20x20) | 144-LQFP - same | 144-LQFP - same | 144-LQFP - same | 144-LQFP - same | 144-LQFP - same |
| Core | HCS12X (16-bit) | HCS12X (16-bit) | HCS12X (16-bit) | HCS12X (16-bit) | HCS12X (16-bit) | HCS12X (16-bit) |
| Maximum Frequency | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 50 MHz |
| Flash Memory | 512 KB | 512 KB | 512 KB | 384 KB (-25%) | 512 KB | 128 KB (-75%) |
| XGATE Co-processor | Yes | Yes | Yes | Yes | Yes | Yes |
| AEC-Q100 Qualified | Yes | Yes | Yes | Yes | Yes | Yes |
| Operating Temperature | -40 C to +105 C | -40 C to +85 C | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C | -40 C to +105 C |
Key Differentiators
- AEC-Q100 Grade 1 qualified at +105 C (vs S912XEQ512J2MAL)
- 512 KB Flash matches typical body/gateway stacks (vs MC9S12XEG128MAA)
- Same 144-LQFP package as alternates - PCB reuse (vs S912XEQ384J3CALR)
Design Notes
The S912XEQ512J3VAG supports 1.8 V, 2.8 V, and 5 V operation through its internal voltage regulator (VDDR) and dual external I/O rails (VDDX1/2/3). Place a 1 uF decoupling capacitor within 5 mm of each VDDX pin and a 10 uF bulk capacitor near the package to handle cranking transients on the 12 V automotive supply. Tie VSSPLL directly to the ground plane with a short trace to minimize PLL jitter on the 50 MHz bus.
Do not leave the TEST pin floating - tie it to VSS through a 4.7 kohm pull-down resistor, otherwise the device may enter factory test mode on power-up. The BKGD pin must be pulled high through a pull-up during reset for normal operation; use the BDM interface for debug. Avoid driving CAN lines without proper termination; CAN0/CAN1 require 120 ohm bus termination at the cable ends.
Estimated: at 50 MHz core and typical 1.8 V internal VDDR, core current is around 50-70 mA, dissipating 0.1-0.15 W internally. The 144-LQFP package has a theta_JA of approximately 35-40 C/W, giving a junction temperature rise of about 5-6 C above ambient - well within the +105 C automotive Grade 1 ceiling. Derate slightly if all 144 I/O pins switch at full DC load.
Route the EXTAL/XTAL traces as short, symmetric differential pairs and keep them away from switching I/O and PWM lines to minimize EMI coupling. Place a guard ring around the oscillator and connect it to ground. Use a four-layer PCB with a dedicated ground plane under the MCU to provide a low-impedance return for high-frequency switching currents from CAN and SPI lines.
Compliance Information
AEC-Q100 Grade 1 qualified per NXP product page and Arrow listing. RoHS compliant per NXP product page. Halogen-free status not explicitly stated in verified web data - defaulting to 'unknown'.
