MC9S12XD256CAL - 16-bit 80MHz 256KB Flash MCU | NXP | Automotive
MPN: MC9S12XD256CAL ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $23.18 | $23.18 |
| 10 | $21.9 | $219.00 |
| 100 | $20.1 | $2,010.00 |
| 500 | $18.6 | $9,300.00 |
| 1,000 | $17.2 | $17,200.00 |
MC9S12XD256CAL Overview
A microcontroller unit (MCU) is a single integrated circuit that combines a processor core, memory, and programmable peripherals into one chip, forming the lowest programmable layer of the embedded systems hierarchy: MCU -> embedded processor -> microprocessor -> semiconductor device. The HCS12X family is NXP's enhanced 16-bit CISC architecture, upward compatible with the earlier HCS12 (S12) instruction set, so existing HCS12 firmware migrates with minimal changes.
Key features of the MC9S12XD256CAL include the HCS12X CPU with instruction queue and enhanced indexed addressing, 256 KB (256K x 8) flash program memory, a phase-locked loop (PLL)-based clock and reset generator (CRG) that multiplies an external crystal up to the 80 MHz bus rate, multiple serial communication interfaces (SCI, SPI), a controller area network (CAN) module for vehicle networks, and an analog-to-digital converter. The device operates from a 5 V supply with a 2.5 V regulated core, a combination typical of the S12XD family.
The XGATE co-processor architecture of the S12XD generation offloads interrupt handling and communication tasks from the main CPU, effectively providing an additional 100 MIPS of concurrent processing throughput for protocol stacks and I/O management.
Typical applications include automotive body control modules, HVAC controllers, dashboard and instrument clusters, gateways between CAN networks, and industrial control systems that benefit from the robust 5 V noise immunity and CAN connectivity.
Design consideration: because the part is listed NRND (Not Recommended for New Designs) on the NXP product page, new designs should evaluate the S12XE or MagniV families, while existing designs can continue sourcing through authorized excess-stock channels.
This page synthesizes distributor pricing, same-family drop-in alternatives, and practical design notes not consolidated in the manufacturer datasheet.
Drop-in alternatives for MC9S12XD256CAL — 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 MC9S12XD256CAL (same form factor and footprint) — differing in Package, Operating Temperature, ADC, Timers, Core Processor.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC9S12XD256MAL
✅ Drop-In✓ In Stock
$17.85 / Unit
View Datasheet →MC9S12XDT256CAG
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$17.4 / Unit
View Datasheet →MC9S12XEQ384CAG
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
Contact for price
View Datasheet →MC9S12XEP768CAG
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$19.85 / Unit
View Datasheet →MC9S12XA256CAAR
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$9.95 / Unit
View Datasheet →MC9S12XD256CAL Maximum Ratings & Electrical Characteristics
| Core Processor | HCS12X (16-bit CISC) |
| Core Size | 16-bit |
| Bus Frequency | 80 MHz |
| Flash Memory | 256 KB (256K x 8) |
| RAM Size | 12 KB |
| Supply Voltage (VDD) | 2.35 V to 2.75 V |
| I/O Voltage | 5 V (2.5 V/5 V dual rail) |
| I/O Count | 119 I/O ports |
| Peripherals | CRG (clocks and reset generator), SCI, SPI, CAN, ADC |
| Connectivity | CANbus, SCI, SPI |
| Operating Temperature | -40C to +125C (automotive grade A suffix) |
| Qualification | AEC-Q100 (automotive) |
| Package | 112-LQFP (20x20 mm) |
| Mounting Type | Surface Mount |
| Packaging | Tray |
| RoHS Status | Compliant |
MC9S12XD256CAL 112-lqfp (20x20 mm) Pin Configuration Guide
Pin configuration for MC9S12XD256CAL (112-lqfp (20x20 mm) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for MC9S12XD256CAL.
Refer to the datasheet for full pin configuration.
Typical Applications
MC9S12XD256CAL is suitable for 6 applications: Automotive Body Control Modules, Instrument Clusters and Dashboards, CAN Network Gateways, HVAC Control Modules, Industrial Control Systems, Engine and Powertrain Auxiliary Controllers.
Automotive Body Control Modules
The MC9S12XD256CAL fits body control modules (BCM) because its AEC-Q100 qualification, -40C to +125C temperature rating, and 5 V I/O noise immunity match the harsh electrical environment of vehicle cabins and engine bays. Its 119 I/O lines drive relays, lamp loads, and switch matrices directly, while the integrated CAN interface connects the module to the vehicle network without an external protocol chip. In a typical BCM, the 80 MHz HCS12X core runs the state machine for load control while polling ADC channels for switch and sensor diagnostics; the 256 KB flash accommodates full firmware plus diagnostic bootloaders (UDS/KWP2000). Designers should budget flash headroom for OTA-style update code, which is a reason the pin-compatible XEP768 variant is often chosen for BCM redesigns.
Recommended
Instrument Clusters and Dashboards
Dashboard and instrument-cluster controllers benefit from the MC9S12XD256CAL's combination of timer channels for stepper-motor gauge drive, ADC inputs for fuel and temperature sensing, and CAN connectivity for vehicle-speed and engine data. The 80 MHz bus speed provides margin for real-time gauge update rates and LCD segment refresh, and the 12 KB RAM holds display buffers and diagnostic frames. Because clusters remain powered in accessory mode, the CRG-based low-power clock modes reduce standby current. The 112-LQFP 20x20 mm footprint suits the dense multi-gauge PCB of a cluster. Note the part's NRND status: new cluster platforms should instead adopt the pin-compatible S9S12XE/S12G family, reusing the same layout with firmware changes for the revised peripheral map.
Recommended
CAN Network Gateways
Gateway nodes bridging multiple CAN buses suit the MC9S12XD256CAL because the S12XD generation pairs the main CPU with an XGATE co-processor that independently services CAN message queues, filtering and forwarding frames without loading the core. The 80 MHz bus and instruction queue sustain inter-bus forwarding latency in the tens of microseconds required by powertrain and chassis networks. The 256 KB flash holds protocol conversion tables plus OBD diagnostics. Gateway designs pair the MCU with high-speed CAN transceivers on each bus and a system basis chip for wake-up handling. Since the device is NRND, high-volume gateway programs should qualify the S12XE-based pin-compatible upgrade early to secure long-term supply.
Recommended
HVAC Control Modules
Automotive HVAC controllers use the MC9S12XD256CAL to blend-air door actuators, blower PWM stages, and temperature sensor networks on one 5 V board. The ADC reads NTC thermistors for cabin and evaporator temperature, timer channels generate PWM for blower-speed control, and the CAN link reports status to the climate-control master. The 119 I/O count covers multiple stepper-driven flap actuators without port expanders, and the -40C to +125C range covers under-dash and near-engine mounting positions. The 256 KB flash stores control laws plus seat-heating and defrost logic. Designers should implement watchdog-based failsafe actuator shutdown, since HVAC faults can obscure windshields - the CRG's watchdog module supports this.
Recommended
Industrial Control Systems
Beyond vehicles, the MC9S12XD256CAL serves industrial control nodes where 5 V noise immunity and a CISC 16-bit core with large flash simplify legacy maintenance. Typical roles include motor-control sequencers, pump and valve controllers, and sensor-hub boards that speak CANopen or DeviceNet over its CAN module. The 80 MHz performance handles PID loops at kHz rates, while 119 I/O lines interface limit switches, relays, and H-bridge drivers. The 256 KB flash supports field-updatable firmware with dual-bank bootloaders. For industrial new builds the NRND status matters less than for automotive because industrial programs have shorter lives, but designers should still note that the pin-compatible S12XE family offers an active migration path with identical footprint.
Recommended
Engine and Powertrain Auxiliary Controllers
Auxiliary powertrain controllers - fan-speed modules, throttle-body controllers, exhaust-flap actuators - fit the MC9S12XD256CAL's profile: AEC-Q100 grade, 125C ambient capability, fast ADC sampling of position sensors, and CAN communication with the ECU. The HCS12X core's deterministic CISC execution simplifies safety-related timing analysis compared with pipelined RISC parts, and the CRG provides the watchdog and clock monitoring required for fault-tolerant actuator control. The 256 KB flash stores calibration tables alongside code, and the 12 KB RAM keeps sensor-filtering buffers on-chip. Underhood placement demands careful PCB thermal design with 2 oz copper and thermal vias at the LQFP's exposed footprint region.
Recommended
Recommended Products Summary
Engineering reference data for MC9S12XD256CAL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC9S12XD256MAL | MC9S12XDT256CAG | MC9S12XEP768CAG |
|---|---|---|---|---|
| Package | 112-LQFP (20x20 mm) | 112-LQFP - same footprint | 112-LQFP - same footprint | 112-LQFP - same footprint |
| Brand | NXP Semiconductors (Freescale) | NXP Semiconductors (Freescale) | NXP Semiconductors (Freescale) | NXP Semiconductors (Freescale) |
| Core / Bus Speed | HCS12X 16-bit @ 80 MHz | HCS12X 16-bit @ 80 MHz | HCS12X 16-bit @ 80 MHz | S12XE 16-bit @ 50 MHz |
| Flash Memory | 256 KB | 256 KB | 256 KB | 768 KB |
| Supply Voltage | 2.35-2.75 V core / 5 V I/O | 2.35-2.75 V core / 5 V I/O | 5 V single-supply | 5 V single-supply |
| Lifecycle Status | NRND | NRND | NRND / limited availability | Active |
Key Differentiators
- Largest flash among same-package 256 KB-class alternatives at same cost tier is not available - instead the CAL grade adds AEC-Q100 automotive qualification (vs MC9S12XD256MAL)
- Active-state 3x flash upgrade without PCB change (vs MC9S12XEP768CAG)
- S12XD dual-supply architecture (2.5 V core / 5 V I/O) (vs MC9S12XDT256CAG)
Design Notes
The MC9S12XD256CAL requires a 2.35-2.75 V core rail in addition to the 5 V I/O domain (per the digchip specification table listing supply voltage 2.35 to 2.75 V). Provide independent decoupling - 0.1 uF ceramic at each VDD/VDDIO pin pair plus 10 uF bulk - and sequence the 5 V rail so the core rail is never driven above 2.75 V. If using an NXP system basis chip such as the MC33989, its built-in sequencing and watchdog satisfy most automotive power-supply requirements for S12XD designs.
At the 80 MHz bus frequency produced by the CRG PLL, keep the crystal and PLL loop-filter components within 10 mm of the EXTAL/XTAL pins and route the filter as a quiet analog island with a local ground. Unused I/O should be configured as outputs driving low or inputs with pull-ups to prevent floating-pin EMI. The S12XD hardware design application notes from NXP (AN-level guides for the S12XD family) provide reference layouts; follow the single-point ground recommendation for mixed 5 V I/O and analog ADC sections.
The most common pitfall is ignoring the NRND status: designs qualified on this part must plan a last-time-buy or migration strategy now. The pin-compatible MC9S12XEP768CAG (S12XE, active) minimizes PCB rework, but its peripheral map differs slightly, so firmware registers must be re-validated. Also, the 112-LQFP has a 0.5 mm pin pitch - inspect solder joints with X-ray or AOI, since bridging on fine-pitch S12 packages is a leading field-return cause. Do not exceed the 2.75 V core maximum during debugging with external supplies.
Compliance Information
AEC-Q100 automotive qualification confirmed by Arrow product listing. RoHS compliance and lead-free status standard for NXP S12XD automotive family; REACH and halogen-free status not stated in the provided data.
