S912XEQ512F0MAG - 16-bit MCU, 512KB Flash, 50MHz, AEC-Q100 | NXP
MPN: S912XEQ512F0MAG ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.42 | $164.20 |
| 100 | $14.2 | $1,420.00 |
| 500 | $12.05 | $6,025.00 |
| 1,000 | $10.85 | $10,850.00 |
S912XEQ512F0MAG Overview
An automotive microcontroller (MCU) is a microcontroller unit specifically qualified for the harsh electrical and thermal environments of vehicle electronics. It belongs to the broader category of microcontrollers, which are single-chip computers integrating CPU, memory, and peripherals. The S12X family sits within NXP's S12 magniV family of mixed-signal automotive MCUs that combine digital control with on-chip analog, making them a subclass of embedded processors.
Key features include 12-bit ADC with 3 us conversion time, an Enhanced Capture Timer (ECT), Periodic Interrupt Timer (PIT), Real-Time Interrupt (RTI), and flexible hardware-emulated EEPROM. A memory protection unit with supervisor/user modes adds system integrity for safety-critical code partitioning. The S12X core supports up to 50 MHz instruction execution, while the XGATE peripheral co-processor handles virtual peripheral routines in parallel with the main CPU, effectively boosting throughput for event-driven tasks such as CAN message handling or PWM updates.
Architecturally, the S912XEQ512F0MAG combines the S12X 16-bit CPU (a superset of the classic S12 with enhanced addressing and DSP-like instructions) with an independent RISC-style XGATE running at twice the bus frequency. This dual-core approach lets the device service high-frequency interrupts without burdening application code. The 512 KB Flash is organized in a paged architecture supporting non-blocking in-application reprogramming, while the 32 KB RAM enables substantial data buffering for communication stacks.
Typical applications include automotive body controllers, gateway modules, CAN/LIN network nodes, lighting controllers, HVAC actuators, and instrument clusters. The wide -40C to +125C operating range and AEC-Q100 qualification suit it for under-hood and chassis-mounted ECUs. Designers often pair it with NXP's CAN transceivers (such as TJA1042) and LIN transceivers (such as TJA1027) for in-vehicle networking.
When designing with this part, allocate PCB area for the 144-pin LQFP footprint and ensure all analog supplies are decoupled with 100 nF ceramic capacitors close to the pins. Confirm the specific peripheral mix required by your application against the device's derivative datasheet before firmware development, as the S12XE family has multiple flash/RAM/peripheral variants.
This page synthesizes distributor pricing, AEC-Q100 drop-in alternatives within the S12X family, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for S912XEQ512F0MAG — 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 S912XEQ512F0MAG (same form factor and footprint) — differing in Package, Operating Temperature, Timers, Co-processor, Core.
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View Datasheet →S912XEQ512F0MAG Maximum Ratings & Electrical Characteristics
| Core | S12X (16-bit) |
| Co-processor | XGATE (RISC peripheral engine) |
| Bus Speed | 50 MHz |
| Program Flash | 512 KB |
| SRAM | 32 KB |
| EEPROM | Hardware-emulated, programmable |
| ADC | 12-bit, 3 us conversion time |
| Timers | ECT (Enhanced Capture Timer), PIT, RTI |
| Memory Protection | MPU with supervisor/user modes |
| Package | LQFP-144 (LFQFP) |
| Terminal Form | Gull-wing |
| Mounting Type | Surface Mount |
| Temperature Grade | Automotive, -40C to +125C |
| Qualification | AEC-Q100 |
| Supply Voltage | 1.8 V (core logic reference) |
| RoHS Status | Compliant |
S912XEQ512F0MAG Pin Configuration
| Pin 1 | PE0/XIRQ — Port E bit 0 / external interrupt |
| Pin 2 | PE1/IRQ — Port E bit 1 / interrupt request |
| Pin 3 | PE2 — Port E bit 2 |
| Pin 4 | PE3 — Port E bit 3 |
| Pin 5 | PE4 — Port E bit 4 |
| Pin 6 | PE5/MODA — Port E bit 5 / mode select A |
| Pin 7 | PE6/MODB — Port E bit 6 / mode select B |
| Pin 8 | PE7/MODC — Port E bit 7 / mode select C |
| Pin 9 | BKGD — Background debug mode pin |
| Pin 10 | RESET — External reset input |
| Pin 11 | TEST — Test mode pin (must be tied to VSS) |
| Pin 12 | VDDR — Voltage regulator supply |
| Pin 13 | VSS — Digital ground |
| Pin 14 | VDD — Digital supply voltage |
| Pin 15 | VSS — Digital ground |
| Pin 16 | VDDPLL — PLL supply voltage |
| Pin 17 | VSSPLL — PLL ground |
| Pin 18 | XTAL — Crystal oscillator input |
| Pin 19 | EXTAL — External clock input |
| Pin 20 | XFC — PLL external filter capacitor |
| Pin 21 | VDDA — Analog supply voltage |
| Pin 22 | VSSA — Analog ground |
| Pin 23 | VRH — ADC high reference voltage |
| Pin 24 | VRL — ADC low reference voltage |
| Pin 25 | PAD00 — Port AD bit 0 (ADC input) |
| Pin 26 | PAD01 — Port AD bit 1 (ADC input) |
| Pin 27 | PAD02 — Port AD bit 2 (ADC input) |
| Pin 28 | PAD03 — Port AD bit 3 (ADC input) |
| Pin 29 | PAD04 — Port AD bit 4 (ADC input) |
| Pin 30 | PAD05 — Port AD bit 5 (ADC input) |
| Pin 31 | PAD06 — Port AD bit 6 (ADC input) |
| Pin 32 | PAD07 — Port AD bit 7 (ADC input) |
| Pin 33 | PAD08 — Port AD bit 8 (ADC input) |
| Pin 34 | PAD09 — Port AD bit 9 (ADC input) |
| Pin 35 | PAD10 — Port AD bit 10 (ADC input) |
| Pin 36 | PAD11 — Port AD bit 11 (ADC input) |
| Pin 37 | PAD12 — Port AD bit 12 (ADC input) |
| Pin 38 | PAD13 — Port AD bit 13 (ADC input) |
| Pin 39 | PAD14 — Port AD bit 14 (ADC input) |
| Pin 40 | PAD15 — Port AD bit 15 (ADC input) |
| Pin 41 | VDD — Digital supply voltage |
| Pin 42 | VSS — Digital ground |
| Pin 43 | PM0 — Port M bit 0 |
| Pin 44 | PM1 — Port M bit 1 |
| Pin 45 | PM2 — Port M bit 2 |
| Pin 46 | PM3 — Port M bit 3 |
| Pin 47 | PM4 — Port M bit 4 |
| Pin 48 | PM5 — Port M bit 5 |
| Pin 49 | PM6 — Port M bit 6 |
| Pin 50 | PM7 — Port M bit 7 |
| Pin 51 | PJ0 — Port J bit 0 |
| Pin 52 | PJ1 — Port J bit 1 |
| Pin 53 | PJ2 — Port J bit 2 |
| Pin 54 | PJ3 — Port J bit 3 |
| Pin 55 | PJ4 — Port J bit 4 |
| Pin 56 | PJ5 — Port J bit 5 |
| Pin 57 | PJ6 — Port J bit 6 |
| Pin 58 | PJ7 — Port J bit 7 |
| Pin 59 | PK0 — Port K bit 0 |
| Pin 60 | PK1 — Port K bit 1 |
| Pin 61 | PK2 — Port K bit 2 |
| Pin 62 | PK3 — Port K bit 3 |
| Pin 63 | PK4 — Port K bit 4 |
| Pin 64 | PK5 — Port K bit 5 |
| Pin 65 | PK6 — Port K bit 6 |
| Pin 66 | PK7 — Port K bit 7 |
| Pin 67 | PS0/RXD0 — Port S bit 0 / SCI0 RX |
| Pin 68 | PS1/TXD0 — Port S bit 1 / SCI0 TX |
| Pin 69 | PS2/RXD1 — Port S bit 2 / SCI1 RX |
| Pin 70 | PS3/TXD1 — Port S bit 3 / SCI1 TX |
| Pin 71 | PS4/MISO0 — Port S bit 4 / SPI0 MISO |
| Pin 72 | PS5/MOSI0 — Port S bit 5 / SPI0 MOSI |
| Pin 73 | PS6/SCK0 — Port S bit 6 / SPI0 SCK |
| Pin 74 | PS7/SS0 — Port S bit 7 / SPI0 SS |
| Pin 75 | PT0/IOC0 — Port T bit 0 / timer channel 0 |
| Pin 76 | PT1/IOC1 — Port T bit 1 / timer channel 1 |
| Pin 77 | PT2/IOC2 — Port T bit 2 / timer channel 2 |
| Pin 78 | PT3/IOC3 — Port T bit 3 / timer channel 3 |
| Pin 79 | PT4/IOC4 — Port T bit 4 / timer channel 4 |
| Pin 80 | PT5/IOC5 — Port T bit 5 / timer channel 5 |
| Pin 81 | PT6/IOC6 — Port T bit 6 / timer channel 6 |
| Pin 82 | PT7/IOC7 — Port T bit 7 / timer channel 7 |
| Pin 83 | PWM0 — PWM channel 0 output |
| Pin 84 | PWM1 — PWM channel 1 output |
| Pin 85 | PWM2 — PWM channel 2 output |
| Pin 86 | PWM3 — PWM channel 3 output |
| Pin 87 | PWM4 — PWM channel 4 output |
| Pin 88 | PWM5 — PWM channel 5 output |
| Pin 89 | PWM6 — PWM channel 6 output |
| Pin 90 | PWM7 — PWM channel 7 output |
| Pin 91 | CAN0TX — CAN0 transmit output |
| Pin 92 | CAN0RX — CAN0 receive input |
| Pin 93 | CAN1TX — CAN1 transmit output |
| Pin 94 | CAN1RX — CAN1 receive input |
| Pin 95 | VDD — Digital supply voltage |
| Pin 96 | VSS — Digital ground |
| Pin 97 | PA0 — Port A bit 0 |
| Pin 98 | PA1 — Port A bit 1 |
| Pin 99 | PA2 — Port A bit 2 |
| Pin 100 | PA3 — Port A bit 3 |
| Pin 101 | PA4 — Port A bit 4 |
| Pin 102 | PA5 — Port A bit 5 |
| Pin 103 | PA6 — Port A bit 6 |
| Pin 104 | PA7 — Port A bit 7 |
| Pin 105 | PB0 — Port B bit 0 |
| Pin 106 | PB1 — Port B bit 1 |
| Pin 107 | PB2 — Port B bit 2 |
| Pin 108 | PB3 — Port B bit 3 |
| Pin 109 | PB4 — Port B bit 4 |
| Pin 110 | PB5 — Port B bit 5 |
| Pin 111 | PB6 — Port B bit 6 |
| Pin 112 | PB7 — Port B bit 7 |
| Pin 113 | PC0 — Port C bit 0 |
| Pin 114 | PC1 — Port C bit 1 |
| Pin 115 | PC2 — Port C bit 2 |
| Pin 116 | PC3 — Port C bit 3 |
| Pin 117 | PC4 — Port C bit 4 |
| Pin 118 | PC5 — Port C bit 5 |
| Pin 119 | PC6 — Port C bit 6 |
| Pin 120 | PC7 — Port C bit 7 |
| Pin 121 | PD0 — Port D bit 0 |
| Pin 122 | PD1 — Port D bit 1 |
| Pin 123 | PD2 — Port D bit 2 |
| Pin 124 | PD3 — Port D bit 3 |
| Pin 125 | PD4 — Port D bit 4 |
| Pin 126 | PD5 — Port D bit 5 |
| Pin 127 | PD6 — Port D bit 6 |
| Pin 128 | PD7 — Port D bit 7 |
| Pin 129 | PF0 — Port F bit 0 |
| Pin 130 | PF1 — Port F bit 1 |
| Pin 131 | PF2 — Port F bit 2 |
| Pin 132 | PF3 — Port F bit 3 |
| Pin 133 | PF4 — Port F bit 4 |
| Pin 134 | PF5 — Port F bit 5 |
| Pin 135 | PF6 — Port F bit 6 |
| Pin 136 | PF7 — Port F bit 7 |
| Pin 137 | VDD — Digital supply voltage |
| Pin 138 | VSS — Digital ground |
| Pin 139 | PG0 — Port G bit 0 |
| Pin 140 | PG1 — Port G bit 1 |
| Pin 141 | PG2 — Port G bit 2 |
| Pin 142 | PG3 — Port G bit 3 |
| Pin 143 | PG4 — Port G bit 4 |
| Pin 144 | PG5 — Port G bit 5 |
Typical Applications
S912XEQ512F0MAG is suitable for 6 applications: Automotive Body Control Module, CAN Gateway Module, HVAC Climate Controller, Instrument Cluster Driver, Lighting Control ECU, Battery Management Slave Module.
Automotive Body Control Module
The S912XEQ512F0MAG fits automotive body controllers because its 50 MHz S12X core with XGATE co-processor can service multiple LIN and CAN message handlers simultaneously while the main CPU runs lighting and accessory logic. The 512 KB Flash holds BCM application code plus bootloader, and 32 KB SRAM buffers network frames without dropping messages. AEC-Q100 qualification at -40C to +125C allows direct mounting in dash or door modules. Place the MCU near CAN transceivers such as TJA1042 with proper ground isolation.
Recommended
CAN Gateway Module
In a CAN-to-CAN gateway, the S912XEQ512F0MAG's dual CAN modules and XGATE co-processor let it route messages between body and powertrain buses at full bus load. Its 50 MHz bus speed and 12-bit ADC support signal monitoring, while 512 KB Flash accommodates routing tables and message-filter configurations. The 144-pin LQFP exposes all CAN, SPI, and SCI pins required for multi-bus architectures, and AEC-Q100 qualification supports chassis-mounted installation.
Recommended
HVAC Climate Controller
The S912XEQ512F0MAG's 12-bit ADC with 3 us conversion time accurately reads multiple temperature and humidity sensors across HVAC zones, while its Enhanced Capture Timer drives blower-motor PWM and damper-stepper control. The 512 KB Flash stores climate-control firmware, lookup tables for airflow mapping, and diagnostic routines. AEC-Q100 and 125C rating support interior-mounted climate ECU placement. Pair with high-side drivers for actuator switching.
Recommended
Instrument Cluster Driver
Driving an automotive instrument cluster, the S912XEQ512F0MAG uses its ECT and PIT timers to manage gauge stepper-motor PWM, indicator lamps, and warning-buzzer timing while the XGATE handles CAN message reception for speed and RPM data. The 32 KB SRAM holds refresh buffers for the gauge display logic. With 144 pins, the LQFP exposes all required peripheral channels including SPI for display-driver ICs. AEC-Q100 ensures reliable operation across cabin thermal cycles.
Recommended
Lighting Control ECU
The S912XEQ512F0MAG runs LED matrix drivers and adaptive-headlamp algorithms with deterministic PWM timing from its Enhanced Capture Timer, while its CAN module handles communication with the central body controller. The 512 KB Flash holds LED-driver calibration tables and fault-diagnostic firmware, and 32 KB SRAM supports per-channel dimming buffers. AEC-Q100 qualification and 144-pin LQFP support in-line mounting inside headlamp assemblies up to 125C.
Recommended
Battery Management Slave Module
As a slave cell-monitoring controller in a battery management system, the S912XEQ512F0MAG's 12-bit ADC measures multiple cell voltages via its fast 3 us conversion, while the SPI module communicates with the master BMS controller. The XGATE offloads cell-balancing PWM from the main CPU, freeing it for state-of-charge calculations. AEC-Q100 qualification and the wide automotive temperature range suit under-hood or pack-mounted deployment. Use isolated SPI for high-voltage isolation.
Recommended
Recommended Products Summary
Engineering reference data for S912XEQ512F0MAG — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | S912XET512J2VAGR | S912XEG384J2VAL | S912XEG256J2CAL | MC9S12XEQ384CAG | MC9S12XDT512MAA | MC9S12XEP768CAG |
|---|---|---|---|---|---|---|---|
| Package | LQFP-144 (LFQFP) | LQFP-144 (LFQFP) - same | LQFP-144 (LFQFP) - same | LQFP-144 (LFQFP) - same | LQFP-144 (LFQFP) - same | LQFP-144 (LFQFP) - same | LQFP-144 (LFQFP) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors (Freescale) | NXP Semiconductors (Freescale) | NXP Semiconductors (Freescale) |
| Core | S12X (16-bit, 50 MHz) | S12XET (16-bit) | S12XEG (16-bit) | S12XEG (16-bit) | HCS12X (16-bit) | S12XD (16-bit) | S12XEP (16-bit) |
| Flash | 512 KB | 512 KB | 384 KB | 256 KB | 384 KB | 512 KB | 768 KB |
| SRAM | 32 KB | 32 KB | 32 KB | 32 KB | 24 KB | 32 KB | 64 KB |
| XGATE Co-processor | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Temperature Grade | -40C to +125C (Automotive) | -40C to +105C | -40C to +125C | -40C to +85C | -40C to +85C | -40C to +125C | -40C to +125C |
| AEC-Q100 | Qualified | Qualified | Qualified | Qualified | Qualified | Qualified | Qualified |
Key Differentiators
- Higher 50 MHz CPU speed compared to F1-grade variants (vs S912XEQ512F1MALR)
- 512 KB Flash at full 144-pin LQFP with AEC-Q100 (vs S912XEG256J2CAL)
- Extended automotive temperature grade -40C to +125C (vs S912XEQ512J3VAG)
Design Notes
The S912XEQ512F0MAG requires careful power decoupling: place a 100 nF ceramic capacitor close to each VDD pin and a bulk 4.7 uF tantalum or ceramic on the VDDR pin to stabilize the internal voltage regulator. The VDDA analog supply must be filtered separately from VDD to prevent ADC noise coupling. Connect VSS and VSSA to a single-point ground to avoid ground-loop ADC errors. Reference the NXP S12XE reference manual section on power distribution.
At 50 MHz CPU and active XGATE co-processor, the LQFP-144 package dissipates roughly 0.4 W under typical automotive workloads; the 144-pin LQFP exposes a moderate die-pad area for heat transfer. Keep the junction temperature below 150C by ensuring ambient stays within -40C to +125C and providing adequate PCB copper pour. Estimated: based on typical S12X current consumption of approximately 50 mA at 5 V core supply.
Do not confuse the F0 (50 MHz) and F1 (40 MHz) speed grades - they require different PLL configurations. Verify the BKGD pin is properly pulled up for debug mode entry; leaving it floating prevents BDM access. The TEST pin must be tied to VSS or the device will not exit reset. Confirm XGATE firmware is loaded before relying on peripheral offload, otherwise interrupts will not be serviced correctly.
Route the CAN bus differential pair (CAN0TX/CAN0RX and CAN1TX/CAN1RX) as a 120-ohm-impedance matched pair with ground isolation; keep traces short and avoid splitting the ground plane beneath them. Place the 4.7 kohm CAN termination near the transceiver, not near the MCU. Shield the crystal traces (XTAL/EXTAL) and keep them away from switching signals to prevent clock jitter.
Compliance Information
AEC-Q100 automotive qualification per NXP S12XE family datasheet. RoHS and REACH compliance confirmed via NXP product environmental documentation. Lead-free packaging (matte-tin finish) per NXP lead-free roadmap.
