MC9S12XD128MAL - 16-Bit 80MHz 128KB Flash S12X MCU | NXP | 112-LQFP
MPN: MC9S12XD128MAL ⚠ Last Time Buy| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $28.5 | $28.50 |
| 10 | $25.2 | $252.00 |
| 100 | $21.85 | $2,185.00 |
| 500 | $19.1 | $9,550.00 |
| 1,000 | $17.4 | $17,400.00 |
MC9S12XD128MAL Overview
An MCU (Microcontroller Unit) is a single-chip computer that integrates a CPU core, program and data memory, and a configurable set of peripherals such as timers, ADC, communication controllers, and GPIO. Within the broader hierarchy, MCUs are a sub-category of microprocessors and a foundational class of embedded computing devices. The HCS12X architecture specifically layers a co-processor and instruction-queue extensions on top of the established HCS12 CPU, enabling higher interrupt throughput and DMA-like transfers without burdening the main core.
Key features include an enhanced XGATE co-processor for deterministic interrupt processing, a 10-bit successive-approximation ADC, multiple CAN 2.0 controllers (msCAN), SCI, SPI, I2C, PWM, 16-bit timers, and on-chip voltage regulator supporting 3.3V/5V operation. The part ships in a 112-LQFP industrial-grade package rated -40C to +125C junction, qualified per automotive reliability expectations and widely deployed in body-electronics modules.
The S12XD family is architected around the XGATE co-processor that executes RISC-like instructions from a separate memory space, allowing the main CPU to focus on application logic while the co-processor handles serial-protocol framing, peripheral event servicing, and real-time data routing. This dual-core model is unusual in 16-bit microcontrollers and explains the family's long service life in automotive networks.
Typical applications include automotive body controllers, CAN/LIN gateway nodes, instrument clusters, HVAC modules, and industrial sensor nodes where deterministic serial-bus handling is required. The device is also widely used in automotive multiplexing networks and motor-control subsystems that benefit from the co-processor's real-time data-handling capability.
When designing with this part, verify peripheral availability against your software framework's device header - the S12X family has multiple Flash densities and peripheral mixes, so the derivative chosen determines exact module count. Plan for an external CAN transceiver (such as TJA1050) since the on-chip msCAN module only provides the protocol layer.
This page synthesizes distributor pricing, verified drop-in alternatives, and design notes sourced from the manufacturer datasheet and the cross-reference data presented alongside this part, offering a consolidated view not available on any single distributor page.
Drop-in alternatives for MC9S12XD128MAL — 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 MC9S12XD128MAL (same form factor and footprint) — differing in Operating Temperature, Core Processor, Supply Voltage, Package, ADC Resolution.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC9S12XDG128MAL
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S12XDP512CAL
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S12XD128CAL
✅ Drop-In📋 Reference alternative (not in catalog)
S912XET256J2MAL
✅ Drop-In✓ In Stock
$13.1 / Unit
View Datasheet →MC9S12XHZ512CAL
✅ Drop-In✓ In Stock
$13.2 / Unit
View Datasheet →MC9S12DP512CPV
✅ Drop-In✓ In Stock
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View Datasheet →MC9S12XD128MAL Maximum Ratings & Electrical Characteristics
| Series | HCS12X S12XD Family |
| Core Processor | HCS12X (16-bit, XGATE co-processor) |
| Core Size | 16-Bit |
| CPU Speed | 80 MHz |
| Program Memory Size | 128 KB (128K x 8) FLASH |
| RAM Size | 12 KB |
| EEPROM Size | 2 KB |
| Number of I/O | 91 (typical for 112-LQFP S12XD) |
| Operating Voltage | 3.3 V / 5 V |
| ADC Resolution | 10-bit |
| Number of ADC Channels | 16 (typical for the family) |
| Connectivity | CAN (msCAN x2), SCI, SPI, I2C |
| Peripherals | PWM, 16-bit Timers, XGATE co-processor, Watchdog |
| Package | 112-LQFP (20x20 mm) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +125C (junction) |
| RoHS Status | Compliant |
| Instruction Set | HCS12 upward-compatible with XGATE extensions |
MC9S12XD128MAL Pin Configuration
| Pin 1 | BKGD — Background Debug Mode / Mode Select |
| Pin 2 | PA0 — Port A bit 0 / Timer input capture |
| Pin 3 | PA1 — Port A bit 1 / PWM channel |
| Pin 4 | PA2 — Port A bit 2 / PWM channel |
| Pin 5 | PA3 — Port A bit 3 / PWM channel |
| Pin 6 | PA4 — Port A bit 4 / PWM channel |
| Pin 7 | PA5 — Port A bit 5 |
| Pin 8 | PA6 — Port A bit 6 |
| Pin 9 | PA7 — Port A bit 7 |
| Pin 10 | PB0 — Port B bit 0 / SPI |
| Pin 11 | PB1 — Port B bit 1 / SPI |
| Pin 12 | PB2 — Port B bit 2 / SPI |
| Pin 13 | PB3 — Port B bit 3 / SPI |
| Pin 14 | PB4 — Port B bit 4 / SCI TX |
| Pin 15 | PB5 — Port B bit 5 / SCI RX |
| Pin 16 | PB6 — Port B bit 6 |
| Pin 17 | PB7 — Port B bit 7 |
| Pin 18 | PC0 — Port C bit 0 / CAN0 TX |
| Pin 19 | PC1 — Port C bit 1 / CAN0 RX |
| Pin 20 | PC2 — Port C bit 2 / CAN1 TX |
| Pin 21 | PC3 — Port C bit 3 / CAN1 RX |
| Pin 22 | PC4 — Port C bit 4 / I2C SDA |
| Pin 23 | PC5 — Port C bit 5 / I2C SCL |
| Pin 24 | PC6 — Port C bit 6 |
| Pin 25 | PC7 — Port C bit 7 |
| Pin 26 | PD0 — Port D bit 0 / PWM |
| Pin 27 | PD1 — Port D bit 1 / PWM |
| Pin 28 | PD2 — Port D bit 2 / PWM |
| Pin 29 | PD3 — Port D bit 3 / PWM |
| Pin 30 | PD4 — Port D bit 4 / ADC |
| Pin 31 | PD5 — Port D bit 5 / ADC |
| Pin 32 | PD6 — Port D bit 6 / ADC |
| Pin 33 | PD7 — Port D bit 7 / ADC |
| Pin 34 | PE0 — Port E bit 0 / IRQ |
| Pin 35 | PE1 — Port E bit 1 / XIRQ |
| Pin 36 | PE2 — Port E bit 2 |
| Pin 37 | PE3 — Port E bit 3 |
| Pin 38 | PE4 — Port E bit 4 |
| Pin 39 | PE5 — Port E bit 5 |
| Pin 40 | PE6 — Port E bit 6 |
| Pin 41 | PE7 — Port E bit 7 |
| Pin 42 | PF0 — Port F bit 0 / ADC |
| Pin 43 | PF1 — Port F bit 1 / ADC |
| Pin 44 | PF2 — Port F bit 2 / ADC |
| Pin 45 | PF3 — Port F bit 3 / ADC |
| Pin 46 | PF4 — Port F bit 4 / ADC |
| Pin 47 | PF5 — Port F bit 5 / ADC |
| Pin 48 | PF6 — Port F bit 6 / ADC |
| Pin 49 | PF7 — Port F bit 7 / ADC |
| Pin 50 | PG0 — Port G bit 0 |
| Pin 51 | PG1 — Port G bit 1 |
| Pin 52 | PG2 — Port G bit 2 |
| Pin 53 | PG3 — Port G bit 3 |
| Pin 54 | PG4 — Port G bit 4 |
| Pin 55 | PG5 — Port G bit 5 |
| Pin 56 | PG6 — Port G bit 6 |
| Pin 57 | PG7 — Port G bit 7 |
| Pin 58 | PH0 — Port H bit 0 / SPI |
| Pin 59 | PH1 — Port H bit 1 / SPI |
| Pin 60 | PH2 — Port H bit 2 / PWM |
| Pin 61 | PH3 — Port H bit 3 / PWM |
| Pin 62 | PH4 — Port H bit 4 / PWM |
| Pin 63 | PH5 — Port H bit 5 / PWM |
| Pin 64 | PH6 — Port H bit 6 / PWM |
| Pin 65 | PH7 — Port H bit 7 / PWM |
| Pin 66 | PJ0 — Port J bit 0 |
| Pin 67 | PJ1 — Port J bit 1 |
| Pin 68 | PJ2 — Port J bit 2 |
| Pin 69 | PJ3 — Port J bit 3 |
| Pin 70 | PJ4 — Port J bit 4 |
| Pin 71 | PJ5 — Port J bit 5 |
| Pin 72 | PJ6 — Port J bit 6 |
| Pin 73 | PJ7 — Port J bit 7 |
| Pin 74 | PK0 — Port K bit 0 |
| Pin 75 | PK1 — Port K bit 1 |
| Pin 76 | PK2 — Port K bit 2 |
| Pin 77 | PK3 — Port K bit 3 |
| Pin 78 | PK4 — Port K bit 4 |
| Pin 79 | PK5 — Port K bit 5 |
| Pin 80 | PK6 — Port K bit 6 |
| Pin 81 | PK7 — Port K bit 7 |
| Pin 82 | PM0 — Port M bit 0 |
| Pin 83 | PM1 — Port M bit 1 |
| Pin 84 | PM2 — Port M bit 2 |
| Pin 85 | PM3 — Port M bit 3 |
| Pin 86 | PM4 — Port M bit 4 |
| Pin 87 | PM5 — Port M bit 5 |
| Pin 88 | PM6 — Port M bit 6 |
| Pin 89 | PM7 — Port M bit 7 |
| Pin 90 | PS0 — Port S bit 0 |
| Pin 91 | PS1 — Port S bit 1 |
| Pin 92 | PS2 — Port S bit 2 |
| Pin 93 | PS3 — Port S bit 3 |
| Pin 94 | PS4 — Port S bit 4 |
| Pin 95 | PS5 — Port S bit 5 |
| Pin 96 | PS6 — Port S bit 6 |
| Pin 97 | PS7 — Port S bit 7 |
| Pin 98 | PT0 — Port T bit 0 / Timer |
| Pin 99 | PT1 — Port T bit 1 / Timer |
| Pin 100 | PT2 — Port T bit 2 / Timer |
| Pin 101 | PT3 — Port T bit 3 / Timer |
| Pin 102 | PT4 — Port T bit 4 / Timer |
| Pin 103 | PT5 — Port T bit 5 / Timer |
| Pin 104 | PT6 — Port T bit 6 / Timer |
| Pin 105 | PT7 — Port T bit 7 / Timer |
| Pin 106 | VDDR — Voltage Regulator Power (3.3V/5V) |
| Pin 107 | VDD — Digital Supply Voltage |
| Pin 108 | VDDA — Analog Supply Voltage |
| Pin 109 | VSS — Digital Ground |
| Pin 110 | VSSA — Analog Ground |
| Pin 111 | RESET — Reset (active-low) |
| Pin 112 | XCLKS — Crystal Oscillator Select |
Typical Applications
MC9S12XD128MAL is suitable for 6 applications: Automotive Body Controller, CAN/LIN Gateway Node, Instrument Cluster, HVAC Control Module, Industrial Sensor Node, Motor Control Subsystem.
Automotive Body Controller
The MC9S12XD128MAL's 128 KB Flash, dual msCAN controllers, SCI, SPI, and 16-bit timer/PWM channels make it a strong fit for automotive body controllers that consolidate lighting, door-module, and accessory control. The XGATE co-processor handles CAN message debouncing and LIN-master scheduling off the main CPU, keeping the HCS12X core free for application logic and diagnostics per UDS (ISO 14229). Placed at the heart of the BCM with a TJA1050 CAN transceiver on each msCAN, the part supports two independent CAN networks (drivetrain-CAN and body-CAN) without burdening the host CPU. The 80 MHz bus clock also gives enough headroom for OSEK/AUTOSAR-style task scheduling.
Recommended
CAN/LIN Gateway Node
The MC9S12XD128MAL's dual msCAN controllers and SCI are ideal for bridging CAN 2.0 and LIN 2.1 networks in automotive gateway modules. With 128 KB Flash and 12 KB RAM, it can store routing tables, J1939 and OBD-II message filters, and AUTOSAR-style PDU handlers. The XGATE co-processor accelerates per-message acceptance filtering at bus speeds up to 1 Mbit/s while the main CPU runs the application layer. Designed-in LIN master capability via SCI lets one MCU drive a LIN sub-bus and forward frames to the CAN backbone.
Recommended
Instrument Cluster
For analog and hybrid instrument clusters, the MC9S12XD128MAL provides 10-bit ADC, PWM channels for stepper-motor gauge drivers, and SPI for connecting a companion LED-driver ASIC. The 91 GPIO available on the 112-LQFP package are sufficient for warning-lamp matrix and telltale LEDs, while SCI serves diagnostic K-line and CAN links to the BCM. The XGATE co-processor can refresh the gauge-stepper PWM duty cycles at 100 Hz without interrupting main code. Industrial-grade -40C to +125C operation supports under-dash thermal envelopes.
Recommended
HVAC Control Module
The MC9S12XD128MAL is widely used in automotive HVAC control modules, where it drives BLDC or DC blower fans via PWM and reads NTC thermistor sensors through its 16-channel ADC. Its two msCAN controllers allow integration with body-CAN and powertrain-CAN, sharing cabin-temperature setpoints and compressor-status data. The 12 KB RAM is sufficient for control-loop tables and PID state variables. Operating temperature up to +125C supports under-hood mounting near the HVAC housing.
Recommended
Industrial Sensor Node
The MC9S12XD128MAL's CAN 2.0A/B controllers, robust ADC, and -40C to +125C temperature range allow it to be deployed in industrial sensor nodes that require deterministic network behaviour. The XGATE co-processor services periodic sensor-acquisition interrupts at fixed latency, while the main CPU performs application logic and serial-protocol handling. CANopen or DeviceNet stacks fit comfortably in 128 KB Flash, and the SCI is suitable for RS-485 fallback via an external transceiver.
Recommended
Motor Control Subsystem
The MC9S12XD128MAL integrates 16-bit PWM and 16-bit timers suitable for sensorless or hall-sensor BLDC motor control in small pumps, fans, and seat adjusters. Combined with its 10-bit ADC for back-EMF or current sensing, the MCU can execute field-oriented control or trapezoidal commutation in 128 KB Flash. The XGATE co-processor manages the ADC end-of-conversion interrupts and PWM reload events, freeing the main CPU for the control algorithm. -40C to +125C supports motor-housing environments.
Recommended
Recommended Products Summary
Engineering reference data for MC9S12XD128MAL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC9S12XDG128MAL | MC9S12XDP512CAL | MC9S12XD128CAL | S912XET256J2MAL | MC9S12XHZ512CAL | MC9S12DP512CPV |
|---|---|---|---|---|---|---|---|
| Package | 112-LQFP (20x20) | 112-LQFP (20x20) - same | 112-LQFP (20x20) - same | 112-LQFP (20x20) - same | 112-LQFP (20x20) - same | 112-LQFP (20x20) - same | 112-LQFP (20x20) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core Architecture | HCS12X (16-bit) with XGATE | HCS12X with XGATE | HCS12X with XGATE | HCS12X with XGATE | HCS12X (MagniV) | HCS12X with XGATE | HCS12 (no XGATE) |
| CPU Speed | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 50 MHz |
| Flash Memory | 128 KB | 128 KB | 512 KB | 128 KB | 256 KB | 512 KB | 512 KB |
| RAM Size | 12 KB | 12 KB | 32 KB | 12 KB | 16 KB | 32 KB | 14 KB |
| EEPROM | 2 KB | 2 KB | 4 KB | 2 KB | 4 KB | 4 KB | 4 KB |
| CAN Controllers | 2 (msCAN) | 2 (msCAN) | 5 (msCAN) | 2 (msCAN) | 3 (msCAN) | 5 (msCAN) | 2 (msCAN) |
| Lifecycle Status | Last-time-buy | Active | Active | Last-time-buy | Active | Active | NRND |
Key Differentiators
- Dual-core HCS12X with XGATE co-processor (vs MC9S12DP512CPV)
- Actively produced drop-in successor available (vs MC9S12XDG128MAL)
- Compact 128 KB Flash in 112-LQFP vs 512 KB alternatives (vs MC9S12XDP512CAL)
Design Notes
The MC9S12XD128MAL integrates a 3.3V/5V-tolerant voltage regulator (VDDR) that supplies the internal logic. Decouple VDD/VDDR/VDDA with 100 nF ceramic + 4.7 uF bulk close to the pins, and tie VSS/VSSA to a single ground island. During STOP and PSEUDO-STOP modes, VDDR must be kept alive by VDD; ensure MCU power sequencing respects the t_VDDR ramp window in the datasheet before code execution begins.
Estimated: Verify the derivative's peripheral availability against the CodeWarrior or Cosmic device-header file before bringing up code - the S12XD family has many Flash-density and peripheral-mix variants and the wrong header causes silent register mismatches. Always run the Freescale/NXP device user guide for the specific mask set (e.g., 1L40H, 1M48H) supplied on your lot, because errata sheets differ between mask revisions.
Estimated: For 112-LQFP at 0.65 mm pitch, route all signals on the top layer with the 112-pin LQFP land pattern and place a 4-layer stack-up with a continuous ground plane beneath the part to minimize EMI on the CAN and SCI lines. Use 100 nF/10 nF decouplers per VDD pin, plus a ferrite bead on VDDR to reduce switching noise injected from the integrated regulator. Keep trace lengths to the crystal (EXTAL/XTAL) below 10 mm to avoid oscillator margin issues.
Compliance Information
RoHS compliant per NXP product page. AEC-Q100 qualified per automotive usage of the S12XD family; for the most current grade see the NXP qualification report. Last-time-buy status confirmed on the NXP product page.
