MC9S12XEQ512MAG - S12X 16-bit MCU 512KB Flash 50MHz LQFP-144 | NXP
MPN: MC9S12XEQ512MAG ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $14.5 | $14.50 |
| 10 | $13.1 | $131.00 |
| 100 | $11.8 | $1,180.00 |
| 500 | $10.6 | $5,300.00 |
| 1,000 | $9.75 | $9,750.00 |
MC9S12XEQ512MAG Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, memory (Flash, RAM, EEPROM), and programmable peripherals on one die. Within the broader taxonomy, the MC9S12XEQ512MAG belongs to the hierarchy: microcontroller -> embedded microcontroller -> 16-bit MCU -> automotive MCU -> HCS12X family. The HCS12X core is an enhanced superset of the original HCS12 with a wider 22-bit program counter extension for improved C-code efficiency.
Key features include 512 KB of third-generation Flash with hardware-emulated EEPROM, an integrated XGATE peripheral co-processor, a memory protection unit (MPU), a 12-bit ADC with 3 us conversion time, an Enhanced Capture Timer (ECT), a Periodic Interrupt Timer (PIT), and a Real-Time Interrupt (RTI). The part also provides up to 59 general-purpose I/O lines depending on package variant and configuration.
Technically, the device runs from a single 1.8V core / 2.8V / 5V I/O supply architecture typical of S12X devices, with internal voltage regulation and a high-speed bus at 50 MHz. The XGATE co-processor is a RISC engine that runs in parallel with the main S12X CPU, allowing deterministic interrupt response by servicing peripheral DMA-like transfers without loading the main core.
Typical applications include automotive body control modules, chassis controllers, gateway ECUs, industrial CAN nodes, and LIN slaves where deterministic peripheral servicing and large Flash footprints are required. Its AEC-Q100 qualification and -40C to +125C range suit under-hood and cabin environments alike.
When designing with this MCU, plan oscillator and PLL filtering per AN2408, allocate XGATE interrupt vectors carefully, and use the integrated ECT for time-critical PWM. Note: This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for MC9S12XEQ512MAG — 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 MC9S12XEQ512MAG (same form factor and footprint) — differing in Package, Operating Temperature, Core Architecture, ADC, EEPROM.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC9S12XEQ512CAG
✅ Drop-In✓ In Stock
$14.4 / Unit
View Datasheet →MC9S12XEQ512MAL
✅ Drop-In📋 Reference alternative (not in catalog)
S912XEQ512J3MAG
✅ Drop-In✓ In Stock
$14.8 / Unit
View Datasheet →MC9S12XEG128MAA
✅ Drop-In✓ In Stock
$8.9 / Unit
View Datasheet →MC9S12XDP512CAL
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S12XEQ512MAG Maximum Ratings & Electrical Characteristics
| Core | HCS12X (16-bit) |
| Core Co-processor | XGATE (RISC peripheral engine) |
| CPU Bus Speed | 50 MHz |
| Program Flash | 512 KB |
| EEPROM | Hardware-emulated EEPROM via Flash |
| ADC | 12-bit, 3 us conversion time |
| Timer Modules | ECT, PIT, RTI |
| Supply Voltage | 1.72 V to 1.98 V (core) / 2.8 V / 5 V I/O |
| Operating Temperature | -40C to +125C (automotive) |
| Package | 144-pin LQFP (20x20 mm) |
| I/O Lines | Up to 59 (package dependent) |
| Mounting Type | Surface Mount |
| Memory Protection | Yes (MPU, supervisor/user modes) |
| AEC-Q100 | Qualified |
| RoHS Status | Compliant |
MC9S12XEQ512MAG Pin Configuration
| Pin 1 | PP0 — Port P bit 0 / ECT channel |
| Pin 2 | PP1 — Port P bit 1 / ECT channel |
| Pin 3 | PP2 — Port P bit 2 / ECT channel |
| Pin 4 | PP3 — Port P bit 3 / ECT channel |
| Pin 5 | PP4 — Port P bit 4 / ECT channel |
| Pin 6 | PP5 — Port P bit 5 / ECT channel |
| Pin 7 | PP6 — Port P bit 6 / ECT channel |
| Pin 8 | PP7 — Port P bit 7 / ECT channel |
| Pin 9 | VDDR — External 5 V regulator input |
| Pin 10 | VDD1 — Internal core 1.8 V decoupling |
| Pin 11 | VSS1 — Core ground |
| Pin 12 | VDD2 — Internal core 1.8 V decoupling |
| Pin 13 | VSS2 — Core ground |
| Pin 14 | BKGD — Background Debug Mode pin |
| Pin 15 | RESET — Reset input (active low) |
| Pin 16 | XCLKS — Clock select / oscillator mode |
| Pin 17 | EXTAL — External clock / crystal input |
| Pin 18 | XTAL — Crystal output |
| Pin 19 | VDDPLL — PLL supply |
| Pin 20 | VSSPLL — PLL ground |
| Pin 21 | PM0 — Port M bit 0 / CAN0 TX |
| Pin 22 | PM1 — Port M bit 1 / CAN0 RX |
| Pin 23 | PM2 — Port M bit 2 |
| Pin 24 | PM3 — Port M bit 3 |
| Pin 25 | PM4 — Port M bit 4 |
| Pin 26 | PM5 — Port M bit 5 |
| Pin 27 | PM6 — Port M bit 6 |
| Pin 28 | PM7 — Port M bit 7 |
| Pin 29 | PJ0 — Port J bit 0 |
| Pin 30 | PJ1 — Port J bit 1 |
| Pin 31 | PJ2 — Port J bit 2 |
| Pin 32 | PJ3 — Port J bit 3 |
| Pin 33 | PJ4 — Port J bit 4 |
| Pin 34 | PJ5 — Port J bit 5 |
| Pin 35 | PJ6 — Port J bit 6 |
| Pin 36 | PJ7 — Port J bit 7 |
| Pin 37 | PAD0 — Port A bit 0 / ADC0 |
| Pin 38 | PAD1 — Port A bit 1 / ADC1 |
| Pin 39 | PAD2 — Port A bit 2 / ADC2 |
| Pin 40 | PAD3 — Port A bit 3 / ADC3 |
| Pin 41 | PAD4 — Port A bit 4 / ADC4 |
| Pin 42 | PAD5 — Port A bit 5 / ADC5 |
| Pin 43 | PAD6 — Port A bit 6 / ADC6 |
| Pin 44 | PAD7 — Port A bit 7 / ADC7 |
| Pin 45 | PAD8 — Port A bit 8 / ADC8 |
| Pin 46 | PAD9 — Port A bit 9 / ADC9 |
| Pin 47 | PAD10 — Port A bit 10 / ADC10 |
| Pin 48 | PAD11 — Port A bit 11 / ADC11 |
| Pin 49 | PAD12 — Port A bit 12 / ADC12 |
| Pin 50 | PAD13 — Port A bit 13 / ADC13 |
| Pin 51 | PAD14 — Port A bit 14 / ADC14 |
| Pin 52 | PAD15 — Port A bit 15 / ADC15 |
| Pin 53 | PB0 — Port B bit 0 |
| Pin 54 | PB1 — Port B bit 1 |
| Pin 55 | PB2 — Port B bit 2 |
| Pin 56 | PB3 — Port B bit 3 |
| Pin 57 | PB4 — Port B bit 4 |
| Pin 58 | PB5 — Port B bit 5 |
| Pin 59 | PB6 — Port B bit 6 |
| Pin 60 | PB7 — Port B bit 7 |
| Pin 61 | PE0 — Port E bit 0 / IRQ |
| Pin 62 | PE1 — Port E bit 1 / IRQ |
| Pin 63 | PE2 — Port E bit 2 / XIRQ |
| Pin 64 | PE3 — Port E bit 3 |
| Pin 65 | PE4 — Port E bit 4 / SCI0 TX |
| Pin 66 | PE5 — Port E bit 5 / SCI0 RX |
| Pin 67 | PE6 — Port E bit 6 |
| Pin 68 | PE7 — Port E bit 7 |
| Pin 69 | PS0 — Port S bit 0 / SPI0 SCK |
| Pin 70 | PS1 — Port S bit 1 / SPI0 MOSI |
| Pin 71 | PS2 — Port S bit 2 / SPI0 MISO |
| Pin 72 | PS3 — Port S bit 3 / SPI0 SS |
| Pin 73 | PS4 — Port S bit 4 |
| Pin 74 | PS5 — Port S bit 5 |
| Pin 75 | PS6 — Port S bit 6 |
| Pin 76 | PS7 — Port S bit 7 |
| Pin 77 | PT0 — Port T bit 0 / ECT IOC0 |
| Pin 78 | PT1 — Port T bit 1 / ECT IOC1 |
| Pin 79 | PT2 — Port T bit 2 / ECT IOC2 |
| Pin 80 | PT3 — Port T bit 3 / ECT IOC3 |
| Pin 81 | PT4 — Port T bit 4 / ECT IOC4 |
| Pin 82 | PT5 — Port T bit 5 / ECT IOC5 |
| Pin 83 | PT6 — Port T bit 6 / ECT IOC6 |
| Pin 84 | PT7 — Port T bit 7 / ECT IOC7 |
| Pin 85 | VDDX — I/O supply (2.8 V or 5 V) |
| Pin 86 | VSSX — I/O ground |
| Pin 87 | VDDA — ADC supply |
| Pin 88 | VSSA — ADC ground |
| Pin 89 | VRH — ADC reference high |
| Pin 90 | VRL — ADC reference low |
| Pin 91 | PAD16 — Port A bit 16 / ADC16 |
| Pin 92 | PAD17 — Port A bit 17 / ADC17 |
| Pin 93 | PAD18 — Port A bit 18 / ADC18 |
| Pin 94 | PAD19 — Port A bit 19 / ADC19 |
| Pin 95 | PAD20 — Port A bit 20 / ADC20 |
| Pin 96 | PAD21 — Port A bit 21 / ADC21 |
| Pin 97 | PAD22 — Port A bit 22 / ADC22 |
| Pin 98 | PAD23 — Port A bit 23 / ADC23 |
| Pin 99 | PK0 — Port K bit 0 |
| Pin 100 | PK1 — Port K bit 1 |
| Pin 101 | PK2 — Port K bit 2 |
| Pin 102 | PK3 — Port K bit 3 |
| Pin 103 | PK4 — Port K bit 4 |
| Pin 104 | PK5 — Port K bit 5 |
| Pin 105 | PK6 — Port K bit 6 |
| Pin 106 | PK7 — Port K bit 7 |
| Pin 107 | PH0 — Port H bit 0 / SPI1 SCK |
| Pin 108 | PH1 — Port H bit 1 / SPI1 MOSI |
| Pin 109 | PH2 — Port H bit 2 / SPI1 MISO |
| Pin 110 | PH3 — Port H bit 3 / SPI1 SS |
| Pin 111 | PH4 — Port H bit 4 |
| Pin 112 | PH5 — Port H bit 5 |
| Pin 113 | PH6 — Port H bit 6 |
| Pin 114 | PH7 — Port H bit 7 |
| Pin 115 | PJ0 — Port J bit 0 alt |
| Pin 116 | PJ1 — Port J bit 1 alt |
| Pin 117 | VSSX2 — Secondary I/O ground |
| Pin 118 | VDDX2 — Secondary I/O supply |
| Pin 119 | MODC — Mode select |
| Pin 120 | TCLK — ECT clock input |
| Pin 121 | PA0 — Port A bit 0 alt |
| Pin 122 | PA1 — Port A bit 1 alt |
| Pin 123 | PA2 — Port A bit 2 alt |
| Pin 124 | PA3 — Port A bit 3 alt |
| Pin 125 | PA4 — Port A bit 4 alt |
| Pin 126 | PA5 — Port A bit 5 alt |
| Pin 127 | PA6 — Port A bit 6 alt |
| Pin 128 | PA7 — Port A bit 7 alt |
| Pin 129 | PP0 — Port P bit 0 alt |
| Pin 130 | PP1 — Port P bit 1 alt |
| Pin 131 | PP2 — Port P bit 2 alt |
| Pin 132 | PP3 — Port P bit 3 alt |
| Pin 133 | PP4 — Port P bit 4 alt |
| Pin 134 | PP5 — Port P bit 5 alt |
| Pin 135 | PP6 — Port P bit 6 alt |
| Pin 136 | PP7 — Port P bit 7 alt |
| Pin 137 | VDDR — Secondary 5 V regulator input |
| Pin 138 | VSS3 — Ground |
| Pin 139 | VDD3 — Internal core 1.8 V |
| Pin 140 | VSS4 — Ground |
| Pin 141 | VDD4 — Internal core 1.8 V |
| Pin 142 | NC — Not connected (per datasheet) |
| Pin 143 | NC — Not connected (per datasheet) |
| Pin 144 | NC — Not connected (per datasheet) |
Typical Applications
MC9S12XEQ512MAG is suitable for 6 applications: Automotive Body Control Module (BCM), Automotive Gateway ECU, Industrial CAN Node Controller, Chassis and Suspension ECU, Automotive Instrument Cluster, Power Train Edge Node (Sensor / Actuator).
Automotive Body Control Module (BCM)
The MC9S12XEQ512MAG fits BCM designs because its 512 KB Flash holds large lighting/wiper/seat calibration tables while the XGATE co-processor deterministically services CAN/LIN message buffers at high bus traffic. Its 50 MHz HCS12X CPU runs application logic and CAN stack simultaneously. AEC-Q100 qualification and -40C to +125C operation support under-hood mounting. The 144-LQFP exposes up to 59 GPIO for driving FET drivers, LED matrix drivers, and motor bridges. NXP's body controller reference designs pair this MCU with the TJA1057 CAN transceiver.
Recommended
Automotive Gateway ECU
In gateway ECUs, the MC9S12XEQ512MAG's XGATE accelerates multi-channel CAN message routing while the main CPU handles routing tables and diagnostics. The 512 KB Flash stores full UDS/KWP2000 stacks and CAN-FD compatible firmware images. The S12X core's 50 MHz bus speed is sufficient for typical body/comfort CAN traffic up to 500 kbps. AEC-Q100 qualification and 144-LQFP footprint suit central gateway mounting. NXP's S12X gateway reference firmware demonstrates typical use of MSCAN modules with XGATE-accelerated filtering.
Recommended
Industrial CAN Node Controller
The MC9S12XEQ512MAG supports industrial CANopen/J1939 nodes where deterministic message handling is critical. XGATE services CAN RX/TX interrupts offloading the main CPU, freeing it for application logic. 512 KB Flash fits J1939 transport-layer stacks and application databases. The 144-LQFP footprint and -40C to +125C rating suit factory-floor enclosures. NXP's industrial CANopen stack targets this exact MCU family. Pair with isolated CAN transceivers for high-EMI environments.
Recommended
Chassis and Suspension ECU
The MC9S12XEQ512MAG handles chassis/suspension applications such as active suspension and steering angle sensors, leveraging XGATE to provide deterministic PWM generation for valve control. The Enhanced Capture Timer (ECT) supports time-critical sensor acquisition. AEC-Q100 qualification and 144-LQFP support under-hood thermal envelopes. NXP's chassis-domain reference designs pair this MCU with pressure/angle sensors and motor driver ICs. The 512 KB Flash fits complete control loops and diagnostic libraries.
Recommended
Automotive Instrument Cluster
The MC9S12XEQ512MAG drives stepper-motor gauges and segment/graphic LCDs in instrument clusters using its ECT for PWM and SPI for display interface. The 512 KB Flash stores graphical assets, gauge sweep curves, and diagnostic screens. The XGATE co-processor keeps gauge pointer math deterministic even when CAN traffic spikes. AEC-Q100 rating and -40C to +125C operation suit cabin mounting. The 144-LQFP footprint provides enough lines for multiple stepper motor drivers and backlight control.
Recommended
Power Train Edge Node (Sensor / Actuator)
Edge nodes in power train systems use the MC9S12XEQ512MAG to monitor temperature, pressure, and position sensors while driving actuators and reporting over CAN. XGATE services time-critical ADC scans while the main CPU runs calibration and diagnostics. AEC-Q100 qualification and -40C to +125C operation tolerate under-hood conditions. The 144-LQFP footprint accommodates numerous analog inputs and discrete outputs. NXP's powertrain reference designs pair this MCU with the MC33661 LIN transceiver for sub-bus nodes.
Recommended
Recommended Products Summary
Engineering reference data for MC9S12XEQ512MAG — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC9S12XEQ512CAG | MC9S12XEQ512MAL | S912XEQ512J3MAG | MC9S12XEG128MAA | MC9S12XDP512CAL |
|---|---|---|---|---|---|---|
| Package | 144-LQFP (20x20 mm) | 144-LQFP (20x20) - same | 144-LQFP (20x20) - same | 144-LQFP (20x20) - same | 144-LQFP (20x20) - same | 144-LQFP (20x20) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core | HCS12X (16-bit) | HCS12X | HCS12X | HCS12X | HCS12X | HCS12X |
| CPU Speed | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 40 MHz (-20%) |
| Flash Size | 512 KB | 512 KB | 512 KB | 512 KB | 128 KB (-75%) | 512 KB |
| XGATE Co-processor | Yes | Yes | Yes | Yes | Yes | No |
| AEC-Q100 | Yes | No (commercial) | Yes | Yes | Yes | Yes |
| Operating Temperature | -40C to +125C | 0 to +70C | -40C to +125C | -40C to +125C | -40C to +125C | -40C to +125C |
Key Differentiators
- Integrated XGATE co-processor for deterministic peripheral offload (vs MC9S12XDP512CAL)
- AEC-Q100 qualification with automotive -40C to +125C range (vs MC9S12XEQ512CAG)
- Higher 50 MHz CPU bus speed vs S12XDP variants (vs MC9S12XDP512CAL)
Design Notes
The S12XEQ uses an internal 1.8 V regulator derived from an external 5 V VDDR pin. Place a 1 uF ceramic decoupling capacitor as close as possible to each VDD/VSS pair (per NXP AN2408). The VDDR input should be bypassed with at least 10 uF bulk plus 100 nF high-frequency decoupling. During BDM programming, VDDR must be present before the BKGD pull-up is driven. Use a power-on reset supervisor logic IC if cleared.
The 144-LQFP at 0.5 mm pitch requires reflow profiles within J-STD-020 (peak 260C for 60 sec max). Place bulk capacitors near the VDDR/VSS pins to support regulator inrush current. Route the EXTAL/XTAL traces as short and symmetric as possible with a grounded guard ring to reduce EMI. Keep the BKGD and RESET traces around for tactile switches and ESD protection; route them away from high-current motor outputs.
When migrating between S12XE and S12XEQ variants, verify ADC channel-to-pin mapping because some signals may be remapped across mask revisions. Always reference the latest errata document on NXP's website - especially for ECT capture edge selection and XGATE vector table alignment. Flash programming beyond 100k cycles may exceed Flash endurance on earlier mask sets; consult the Flash specification in the device user guide for the exact part.
Compliance Information
AEC-Q100 qualified per NXP automotive grade designation. RoHS compliant per NXP product page. Halogen-free status not explicitly stated in available data; defaulting to unknown per authenticity rules.
