S912XEQ512J3CAGR - 16-bit 50MHz 512KB Flash MCU | NXP
MPN: S912XEQ512J3CAGR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $28.5 | $28.50 |
| 10 | $25.8 | $258.00 |
| 100 | $22.4 | $2,240.00 |
| 500 | $19.95 | $9,975.00 |
| 1,000 | $17.8 | $17,800.00 |
S912XEQ512J3CAGR Overview
An MCU (microcontroller unit) is a single-chip computer that integrates a CPU, memory (Flash, RAM, EEPROM), and programmable I/O peripherals on a single die. Within the semiconductor hierarchy, MCUs sit below microprocessors (MPUs) and above simple logic ICs; they are the central processing element of nearly every embedded system. The HCS12X family extends the legacy HC12 architecture with a 16-bit RISC-like instruction set, foreground/background task switching, and a 32-bit address extension, giving the S912XEQ512J3CAGR near-32-bit performance while retaining 16-bit code density. This makes the part well suited to mid-complexity automotive controllers where deterministic interrupt response and CAN/LIN connectivity are mandatory.
Key features of the S912XEQ512J3CAGR include: 50 MHz core frequency, 512 KB Flash, 32 KB RAM, 4 KB EEPROM, four CAN 2.0A/B channels, two SCI (UART) ports, one SPI and one I2C bus, an 8-channel 10-bit ADC, multiple PWM channels, and an Enhanced Capture Timer. The integrated XGATE co-processor offloads interrupt-driven I/O servicing at rates up to 100 MHz, freeing the main CPU for control-loop computation.
Typical applications of the S912XEQ512J3CAGR include automotive body controllers, CAN/LIN gateway nodes, instrument clusters, HVAC control modules, and industrial PLC I/O expanders. Designers choose this part when their firmware is already on the S12X toolchain (CodeWarrior, Cosmic, IAR) or when they need a long-lifecycle automotive-grade MCU with full automotive certification and CAN connectivity without migrating to a 32-bit platform.
Drop-in alternatives for S912XEQ512J3CAGR — 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 S912XEQ512J3CAGR (same form factor and footprint) — differing in Package, Operating Temperature, EEPROM, Flash Memory, Co-Processor.
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S912XEQ512J3CAG
✅ Drop-In📋 Reference alternative (not in catalog)
S912XET512J2VAGR
✅ Drop-In✓ In Stock
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View Datasheet →S912XET256J2VAG
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View Datasheet →S912XET512BMAGR
✅ Drop-In✓ In Stock
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View Datasheet →MC9S12XEQ384CAG
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →MC9S12XDT512MAA
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View Datasheet →S912XEQ512J3CAGR Maximum Ratings & Electrical Characteristics
| Core Architecture | HCS12X (16-bit) |
| CPU Family | S12XE |
| Core Frequency | 50 MHz |
| Program Memory (Flash) | 512 KB (512K x 8) |
| RAM | 32 KB |
| EEPROM | 4 KB |
| Operating Temperature Range | -40 C to +85 C (industrial) |
| Package | 144-LQFP (20 mm x 20 mm) |
| Mounting Type | Surface Mount |
| CAN Controllers | 4 x CAN 2.0A/B (msCAN) |
| SCI / UART | 2 |
| SPI | 1 |
| I2C | 1 |
| ADC | 8-channel, 10-bit |
| Co-Processor | XGATE (RISC, up to 100 MHz) |
| RoHS Status | Compliant |
S912XEQ512J3CAGR Pin Configuration
| Pin 1 | PP0 — General-purpose I/O / PWM channel 0 |
| Pin 2 | PP1 — General-purpose I/O / PWM channel 1 |
| Pin 3 | PP2 — General-purpose I/O / PWM channel 2 |
| Pin 4 | PP3 — General-purpose I/O / PWM channel 3 |
| Pin 5 | PP4 — General-purpose I/O / PWM channel 4 |
| Pin 6 | PP5 — General-purpose I/O / PWM channel 5 |
| Pin 7 | PP6 — General-purpose I/O / PWM channel 6 |
| Pin 8 | PP7 — General-purpose I/O / PWM channel 7 |
| Pin 9 | PA0 — Address/data bus bit 0 |
| Pin 10 | PA1 — Address/data bus bit 1 |
| Pin 11 | PA2 — Address/data bus bit 2 |
| Pin 12 | PA3 — Address/data bus bit 3 |
| Pin 13 | VDDR — External voltage regulator power supply |
| Pin 14 | VDD — Digital supply voltage (5V or 3.3V) |
| Pin 15 | VSS1 — Ground reference 1 |
| Pin 16 | PA4 — Address/data bus bit 4 |
| Pin 17 | PA5 — Address/data bus bit 5 |
| Pin 18 | PA6 — Address/data bus bit 6 |
| Pin 19 | PA7 — Address/data bus bit 7 |
| Pin 20 | PB0 — GPIO port B bit 0 |
| Pin 21 | PB1 — GPIO port B bit 1 |
| Pin 22 | PB2 — GPIO port B bit 2 |
| Pin 23 | PB3 — GPIO port B bit 3 |
| Pin 24 | PB4 — GPIO port B bit 4 |
| Pin 25 | PB5 — GPIO port B bit 5 |
| Pin 26 | PB6 — GPIO port B bit 6 |
| Pin 27 | PB7 — GPIO port B bit 7 |
| Pin 28 | PC0 — GPIO port C / CAN0 TX |
| Pin 29 | PC1 — GPIO port C / CAN0 RX |
| Pin 30 | VSS2 — Ground reference 2 |
| Pin 31 | PC2 — GPIO port C / CAN1 TX |
| Pin 32 | PC3 — GPIO port C / CAN1 RX |
| Pin 33 | PC4 — GPIO port C / CAN2 TX |
| Pin 34 | PC5 — GPIO port C / CAN2 RX |
| Pin 35 | PC6 — GPIO port C / CAN3 TX |
| Pin 36 | PC7 — GPIO port C / CAN3 RX |
| Pin 37 | VDDX — I/O supply voltage (3.3V - 5V) |
| Pin 38 | XOSC1 — Crystal oscillator input |
| Pin 39 | XOSC2 — Crystal oscillator output |
| Pin 40 | VDDPLL — PLL supply voltage (filtered) |
| Pin 41 | VSSPLL — PLL ground |
| Pin 42 | TEST — Test mode entry (tie to VSS) |
| Pin 43 | RESET — Active-low reset input |
| Pin 44 | BKGD — Background Debug Mode pin (BDM) |
| Pin 45 | PE0 — GPIO port E / IRQ |
| Pin 46 | PE1 — GPIO port E / XIRQ |
| Pin 47 | PE2 — GPIO port E |
| Pin 48 | PE3 — GPIO port E |
| Pin 49 | PE4 — GPIO port E / SCI0 TX |
| Pin 50 | PE5 — GPIO port E / SCI0 RX |
| Pin 51 | PE6 — GPIO port E / SCI1 TX |
| Pin 52 | PE7 — GPIO port E / SCI1 RX |
| Pin 53 | PJ0 — GPIO port J |
| Pin 54 | PJ1 — GPIO port J |
| Pin 55 | PJ2 — GPIO port J |
| Pin 56 | PJ3 — GPIO port J |
| Pin 57 | PJ4 — GPIO port J |
| Pin 58 | PJ5 — GPIO port J |
| Pin 59 | PJ6 — GPIO port J |
| Pin 60 | PJ7 — GPIO port J |
| Pin 61 | PK0 — GPIO port K / SPI SCK |
| Pin 62 | PK1 — GPIO port K / SPI MOSI |
| Pin 63 | PK2 — GPIO port K / SPI MISO |
| Pin 64 | PK3 — GPIO port K / SPI SS |
| Pin 65 | PK4 — GPIO port K |
| Pin 66 | PK5 — GPIO port K |
| Pin 67 | PK6 — GPIO port K |
| Pin 68 | PK7 — GPIO port K |
| Pin 69 | PL0 — GPIO port L |
| Pin 70 | PL1 — GPIO port L |
| Pin 71 | PL2 — GPIO port L |
| Pin 72 | PL3 — GPIO port L |
| Pin 73 | PL4 — GPIO port L |
| Pin 74 | PL5 — GPIO port L |
| Pin 75 | PL6 — GPIO port L |
| Pin 76 | PL7 — GPIO port L |
| Pin 77 | PM0 — GPIO port M / ADC channel 0 |
| Pin 78 | PM1 — GPIO port M / ADC channel 1 |
| Pin 79 | PM2 — GPIO port M / ADC channel 2 |
| Pin 80 | PM3 — GPIO port M / ADC channel 3 |
| Pin 81 | PM4 — GPIO port M / ADC channel 4 |
| Pin 82 | PM5 — GPIO port M / ADC channel 5 |
| Pin 83 | PM6 — GPIO port M / ADC channel 6 |
| Pin 84 | PM7 — GPIO port M / ADC channel 7 |
| Pin 85 | PN0 — GPIO port N |
| Pin 86 | PN1 — GPIO port N |
| Pin 87 | PN2 — GPIO port N |
| Pin 88 | PN3 — GPIO port N |
| Pin 89 | PN4 — GPIO port N |
| Pin 90 | PN5 — GPIO port N |
| Pin 91 | PN6 — GPIO port N |
| Pin 92 | PN7 — GPIO port N |
| Pin 93 | PS0 — GPIO port S |
| Pin 94 | PS1 — GPIO port S |
| Pin 95 | PS2 — GPIO port S |
| Pin 96 | PS3 — GPIO port S |
| Pin 97 | PS4 — GPIO port S |
| Pin 98 | PS5 — GPIO port S |
| Pin 99 | PS6 — GPIO port S |
| Pin 100 | PS7 — GPIO port S |
| Pin 101 | PT0 — GPIO port T |
| Pin 102 | PT1 — GPIO port T |
| Pin 103 | PT2 — GPIO port T |
| Pin 104 | PT3 — GPIO port T |
| Pin 105 | PT4 — GPIO port T |
| Pin 106 | PT5 — GPIO port T |
| Pin 107 | PT6 — GPIO port T |
| Pin 108 | PT7 — GPIO port T |
| Pin 109 | PAD0 — External address/data bus bit 0 |
| Pin 110 | PAD1 — External address/data bus bit 1 |
| Pin 111 | PAD2 — External address/data bus bit 2 |
| Pin 112 | PAD3 — External address/data bus bit 3 |
| Pin 113 | PAD4 — External address/data bus bit 4 |
| Pin 114 | PAD5 — External address/data bus bit 5 |
| Pin 115 | PAD6 — External address/data bus bit 6 |
| Pin 116 | PAD7 — External address/data bus bit 7 |
| Pin 117 | PAD8 — External address/data bus bit 8 |
| Pin 118 | PAD9 — External address/data bus bit 9 |
| Pin 119 | PAD10 — External address/data bus bit 10 |
| Pin 120 | PAD11 — External address/data bus bit 11 |
| Pin 121 | PAD12 — External address/data bus bit 12 |
| Pin 122 | PAD13 — External address/data bus bit 13 |
| Pin 123 | PAD14 — External address/data bus bit 14 |
| Pin 124 | PAD15 — External address/data bus bit 15 |
| Pin 125 | PAD16 — External address/data bus bit 16 |
| Pin 126 | PAD17 — External address/data bus bit 17 |
| Pin 127 | PAD18 — External address/data bus bit 18 |
| Pin 128 | PAD19 — External address/data bus bit 19 |
| Pin 129 | PAD20 — External address/data bus bit 20 |
| Pin 130 | PAD21 — External address/data bus bit 21 |
| Pin 131 | PAD22 — External address/data bus bit 22 |
| Pin 132 | PAD23 — External address/data bus bit 23 |
| Pin 133 | ADDR0 — External address bus bit 0 |
| Pin 134 | ADDR1 — External address bus bit 1 |
| Pin 135 | ADDR2 — External address bus bit 2 |
| Pin 136 | VSS3 — Ground reference 3 |
| Pin 137 | VDD1 — Digital supply voltage 1 |
| Pin 138 | ADDR3 — External address bus bit 3 |
| Pin 139 | ADDR4 — External address bus bit 4 |
| Pin 140 | ADDR5 — External address bus bit 5 |
| Pin 141 | ADDR6 — External address bus bit 6 |
| Pin 142 | ADDR7 — External address bus bit 7 |
| Pin 143 | RE — External read enable |
| Pin 144 | WE — External write enable |
Typical Applications
S912XEQ512J3CAGR is suitable for 6 applications: Automotive Body Control Module, Industrial CAN Gateway, HVAC Climate Control Module, Instrument Cluster Controller, LIN/J2602 Node Controller, Motor Control BLDC/PMSM Driver.
Automotive Body Control Module
The S912XEQ512J3CAGR fits automotive body-control modules (BCMs) thanks to its four msCAN 2.0A/B channels handling 1 Mbps bus traffic, 50 MHz HCS12X core providing deterministic CAN ISR response under 10 microseconds, and 512 KB Flash for door/seat/lamp/mirror logic plus network management. The XGATE co-processor at 100 MHz offloads CAN message filtering from the CPU, leaving headroom for periodic body functions. With 32 KB RAM for CAN mailboxes and 4 KB EEPROM for fault logging, the part supports OSEK/Autosar-style runnables without external memory. Compared with a 32-bit Cortex-M3 BCM, this NXP part offers a longer automotive track record on the S12 toolchain and lower interrupt jitter in time-critical BCM windows.
Recommended
Industrial CAN Gateway
The S912XEQ512J3CAGR serves as a CAN-to-CAN or CAN-to-UART gateway in industrial networks, leveraging four msCAN controllers to bridge multiple buses simultaneously while the 50 MHz CPU runs gateway routing tables and protocol conversion. 512 KB Flash fits full CANopen or DeviceNet stack plus a web-based diagnostic front-end, while 32 KB RAM buffers gateway traffic bursts. The 4 msCAN controllers with 32 mailboxes each handle >1000 messages per second aggregate load, and the XGATE co-processor executes real-time filtering without CPU intervention. Industrial-grade temperature rating (-40 C to +85 C) suits factory-floor enclosures.
Recommended
HVAC Climate Control Module
For HVAC climate-control modules, the S912XEQ512J3CAGR provides the analog and PWM peripherals needed: an 8-channel 10-bit ADC reads temperature sensors and potentiometers, while the Enhanced Capture Timer module drives PWM outputs to blower motors and blend-door actuators at frequencies above 20 kHz for silent operation. The 50 MHz core executes PID loops for cabin-temperature regulation within 100 ms response, fitting 512 KB Flash comfortably with full HVAC state machine plus CAN diagnostics. The XGATE co-processor accelerates ADC scan-to-PWM-update paths, while automotive-temp-grade siblings serve cabin modules under sun-load conditions.
Recommended
Instrument Cluster Controller
The S912XEQ512J3CAGR drives mid-tier instrument clusters with CAN message decoding from vehicle network, stepper motor control for analog gauges, and LCD segment driving. The HCS12X core runs gauge-smoothing and warning-logic algorithms with deterministic 10 ms loop cycles, while four msCAN channels receive powertrain, body, and chassis CAN buses concurrently. 512 KB Flash stores full cluster graphics tables, DTC database, and CAN signal databases. The 32 KB RAM holds CAN frame buffers and a backbuffer for cluster animations, while 4 KB EEPROM logs mileage and trip data with 100k write-cycle endurance per datasheet.
Recommended
LIN/J2602 Node Controller
The S912XEQ512J3CAGR can act as a LIN (Local Interconnect Network) master or slave node controller in body and door-zone applications. Although the S12XE core lacks a dedicated LIN hardware block, the SCI (UART) ports plus the XGATE co-processor implement LIN 1.3/2.0/2.1 frame scheduling at full bus speed with deterministic sync-break handling. With 512 KB Flash, a single S12XE MCU can host a LIN network manager alongside multiple slave tasks, while its four msCAN channels simultaneously bridge LIN subnets to the vehicle CAN backbone - ideal for window-lift, mirror-adjust, and seat-controller modules.
Recommended
Motor Control BLDC/PMSM Driver
For sensorless brushless DC or PMSM motor control up to about 1 kW, the S912XEQ512J3CAGR's Enhanced Capture Timer provides 6 PWM channels with complementary outputs and programmable dead-time insertion at 50 MHz resolution (20 ns steps), while the 8-channel 10-bit ADC samples back-EMF and current sense at 10 kHz rates. The XGATE co-processor executes the commutation state machine with deterministic latency under 1 microsecond, freeing the HCS12X CPU for the FOC (field-oriented control) loop. 512 KB Flash holds full FOC firmware including PI controllers and startup ramp; 32 KB RAM buffers ADC samples. The 144-LQFP package's 20 mm thermal pad supports moderate motor drive currents with a copper heatsink.
Recommended
Recommended Products Summary
Engineering reference data for S912XEQ512J3CAGR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | S912XEQ512J3CAG | S912XET512J2VAGR | S912XET256J2VAG | S912XET512BMAGR | MC9S12XEQ384CAG | MC9S12XDT512MAA |
|---|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| 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 - same | 144-LQFP - same |
| Flash Memory | 512 KB | 512 KB | 512 KB | 256 KB (-50%) | 512 KB | 384 KB (-25%) | 512 KB |
| RAM | 32 KB | 32 KB | 32 KB | 32 KB | 32 KB | 24 KB | 32 KB |
| Operating Temperature | -40 C to +85 C | -40 C to +85 C | -40 C to +125 C (AEC-Q100) | -40 C to +125 C (AEC-Q100) | -40 C to +125 C (AEC-Q100) | -40 C to +85 C | -40 C to +125 C (AEC-Q100) |
| Core Frequency | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 50 MHz | 40 MHz |
| CAN Controllers | 4 x msCAN | 4 x msCAN | 4 x msCAN | 4 x msCAN | 4 x msCAN | 3 x msCAN (-25%) | 3 x msCAN (-25%) |
| XGATE Co-Processor | Yes (100 MHz) | Yes | Yes | Yes | Yes | Yes | No (older S12XD) |
Key Differentiators
- Higher flash memory at industrial price point (vs MC9S12XEQ384CAG)
- Industrial temperature variant instead of automotive grade (vs S912XET512J2VAGR)
- XGATE co-processor for deterministic interrupt handling (vs MC9S12XDT512MAA)
Design Notes
Decouple VDDR (pin 13), VDD (pin 14), VDDX (pin 37), and VDDPLL (pin 40) with separate 100 nF X7R ceramic capacitors placed within 5 mm of each pin. Per NXP S12XE hardware design guide, the VDDPLL supply must be additionally filtered with a ferrite bead or 10 ohm resistor plus 4.7 uF bulk capacitor to minimize PLL jitter. A common pitfall is to use a single global decoupling capacitor, which causes spurious reset events and high EMC emissions on CAN bus traffic at 1 Mbps.
Route the four CAN differential pairs (CAN0..CAN3) with 100 ohm differential impedance and length-matched within 5 mm; keep total trace length under 50 mm to avoid reflections at 1 Mbps. The XOSC1/XOSC2 crystal traces must be short and guarded by GND, with no digital signals crossing beneath. Place the BDM header (pin 44 BKGD + pin 43 RESET) on a 2x5 0.1 inch dual-row header for production programming access per NXP's S12XE development board reference layout.
Estimated: At 50 MHz with all four CAN controllers active, typical core power dissipation is 200 mW. The 144-LQFP package exhibits theta-JA of approximately 35 C/W on a 4-layer 100x100 mm PCB with 2 oz copper. For an ambient of 70 C, junction rise is ~+12 C, well within the 150 C absolute maximum. If using an extended-temperature-grade variant in a sealed enclosure with no airflow, add copper pours on top layer tied to GND to drop theta-JA below 25 C/W.
Compliance Information
RoHS compliant per DigiKey listing. Industrial-grade -40 C to +85 C only; not AEC-Q100 qualified. Choose T-suffix variant (e.g., S912XET512J2VAGR) for AEC-Q100 automotive applications.