S912XDT256F1CAL - 16-bit S12X MCU 256KB 80MHz | NXP
MPN: S912XDT256F1CAL ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
S912XDT256F1CAL Overview
A 16-bit microcontroller is a single-chip computing device whose CPU processes 16-bit-wide instructions and data, sitting between entry-level 8-bit MCUs and 32-bit MCUs in the embedded hierarchy. The HCS12X family from NXP (originally Freescale Semiconductor) is an upward-compatible evolution of the widely adopted HCS12 architecture, retaining the same interrupt stacking and programmer model while adding an instruction queue, enhanced indexed addressing, and an expanded instruction set.
Key features of the S912XDT256F1CAL include the 16-bit S12X CISC CPU operating at 80 MHz, 256KB (256K x 8) of Flash program memory, automotive-grade qualification, and industrial temperature coverage to +85C. The device is pin-compatible within the S12XD family, allowing Flash-size migration between variants on the same PCB. Peripherals in the S12XD family (such as CAN, SCI, SPI, and PWM modules) support typical automotive and industrial networking workloads.
The S12X core uses a CISC architecture with an instruction queue that improves bus utilization, and the enhanced indexed addressing modes reduce code size in control loops. The XGATE peripheral co-processor available on S12XD devices offloads interrupt servicing and communication handling from the main CPU, effectively boosting real-time throughput without raising core frequency.
Typical applications include automotive body control modules, gateway nodes, HVAC controllers, and industrial automation systems where a proven, qualified 16-bit platform with CAN connectivity is required. The -40C to +85C industrial range suits under-hood adjacent and factory-floor environments.
Design consideration: this part is marked End of Life by NXP, so new designs should plan a migration path to the S12XE/S12XS families or NXP 32-bit parts, while existing designs can secure last-time-buy stock.
This page synthesizes distributor availability data, drop-in family alternatives, lifecycle status, and practical design notes not found in a single manufacturer source.
Drop-in alternatives for S912XDT256F1CAL — 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 S912XDT256F1CAL (same form factor and footprint) — differing in Operating Temperature, Package, Core Processor, EEPROM, Flash Memory.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
S912XET256J2VAG
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View Datasheet →MC9S12XDT512MAA
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View Datasheet →S912XDP512J1MAL
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View Datasheet →S912XET512BMAGR
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View Datasheet →MC9S12XEQ384CAG
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View Datasheet →S912XDT256F1CAL Maximum Ratings & Electrical Characteristics
| Core Processor | HCS12X (S12X core), 16-bit |
| Core Size | 16-bit |
| Speed | 80 MHz |
| Program Memory | 256KB (256K x 8) Flash |
| Supply Voltage | 2.5 V / 5 V |
| Operating Temperature | -40C to +85C |
| Package | 112-LQFP (20x20 mm) |
| Mounting Type | Surface Mount |
| Terminal Form | Gull Wing |
| Number of Terminals | 112 |
| Package Shape | Square (LQFP) |
| Qualification | Automotive Qualified |
| Architecture | CISC, upward compatible with HCS12 |
| Peripherals | Enhanced indexed addressing, instruction queue, enhanced instruction set |
| RoHS Status | unknown |
| Lifecycle Status | End of Life (per NXP product page) |
S912XDT256F1CAL square (lqfp) Pin Configuration Guide
Pin configuration for S912XDT256F1CAL (square (lqfp) 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 S912XDT256F1CAL.
Refer to the datasheet for full pin configuration.
Typical Applications
S912XDT256F1CAL is suitable for 6 applications: Automotive Body Control Modules, Automotive Gateway Nodes, HVAC Control Units, Industrial Automation and Factory Control, EOL Sustainment and Obsolescence Management, Telematics and Fleet Tracking Units.
Automotive Body Control Modules
Body control modules (BCMs) coordinate lighting, door locks, wipers, and seat functions over CAN and LIN networks, a workload the S912XDT256F1CAL was explicitly qualified for. Its automotive qualification and -40C to +85C range cover the environmental envelope of in-cabin and near-engine-bay electronics, while the 80 MHz S12X core provides ample headroom for network stacking and scheduling. The XGATE co-processor architecture of the S12XD family offloads CAN frame handling from the main CPU, keeping interrupt latency predictable. Placed as the central node with the MSCAN modules wired to the vehicle bus and PWM outputs driving lamp loads, the 256KB Flash accommodates a full BCM application. Because the part is End of Life, BCM programs should secure last-time-buy inventory or plan S12XE migration.
Recommended
Automotive Gateway Nodes
Gateway modules translate and route messages between CAN, LIN, and diagnostic networks in a vehicle. The S912XDT256F1CAL fits this role because its S12X core at 80 MHz can sustain message filtering and forwarding while the enhanced indexed addressing modes shrink routing-table code. The 256KB Flash holds protocol stacks plus diagnostics, and the 112-LQFP 20x20 mm package provides enough I/O for multi-bus wiring without a large PCB footprint. Automotive qualification and the industrial -40C to +85C range satisfy gateway mounting locations near the cabin bulkhead. Designers should confirm the exact number of MSCAN channels in the S12XD data sheet before fixing the bus topology. Given EOL status, new gateway programs should evaluate the S12XE family as the qualified successor with the same software ecosystem.
Recommended
HVAC Control Units
Automotive and industrial HVAC controllers blend sensor acquisition (temperature, pressure), PWM-driven blower motors and damper actuators, and network communication. The S912XDT256F1CAL addresses this mix directly: 80 MHz execution handles control-loop math, PWM peripherals drive motor and damper outputs, and CAN/LIN support integrates the unit into the vehicle network. The 256KB Flash is sufficient for PID control, actuator diagnostics, and network stacks, and the -40C to +85C rating covers under-dash thermal environments. Implementation typically uses the MCU's ADC channels to sample NTC sensors and timer modules to generate synchronized PWM outputs; verifying the ADC channel count in the S12XD data sheet is recommended. As the part is EOL, HVAC programs should either stock spare inventory or port to the S12XE family with minimal code change.
Recommended
Industrial Automation and Factory Control
Industrial control nodes such as PLC peripheral cards, motor-control panels, and sensor hubs benefit from the S912XDT256F1CAL's deterministic 16-bit CISC core, 80 MHz bus speed, and rich timer infrastructure. The -40C to +85C industrial rating and the rugged HCS12X architecture - proven across two decades of deployed systems - make it reliable in electrically noisy factory environments. The 256KB Flash accommodates ladder-logic interpreters or dedicated control firmware, while CAN connectivity links the node to plant networks. Systems engineers typically pair the MCU with isolated CAN transceivers and solid-state relay drivers at the I/O boundary. Because NXP has discontinued the part, industrial equipment makers should assess broker stock for service spares and design the next hardware revision around the active S12XE or SPC5 families.
Recommended
EOL Sustainment and Obsolescence Management
A distinctive use case for the S912XDT256F1CAL is lifecycle sustainment of existing vehicle and industrial platforms that already use the S12XD family. Procurement teams use this MPN when executing last-time-buys, validating broker stock against date codes, and qualifying pin-compatible family variants (256KB/384KB/512KB options in matching 112-LQFP footprints) as authorized substitutions. The S12XD family's upward HCS12 compatibility means firmware written for the original part runs unmodified on same-family higher-memory variants, enabling a zero-software-change mitigation for Flash-constrained field failures. Any substitute must be verified pin-to-pin against the 112-pin LQFP footprint using the S12XD data sheet before release. This page's alternatives table is structured specifically to support that engineering change-order workflow.
Recommended
Telematics and Fleet Tracking Units
Aftermarket and embedded telematics boxes combine MCU control with cellular or GNSS modems, and the S912XDT256F1CAL serves as the local controller handling sensor polling, geofence logic, power management, and modem supervision over SCI/SPI links. The 80 MHz S12X core delivers enough throughput for message framing and watchdog supervision, while 256KB Flash stores application logic and buffering. The 112-LQFP 20x20 mm package keeps the telematics PCB compact for DIN-rail or behind-dash mounting, and the -40C to +85C range covers windshield and engine-bay-adjacent placements. Designers should implement the modem interface on SCI with hardware flow control and verify peripheral counts in the S12XD data sheet. For new telematics designs, the active S12XE family is the recommended drop-in architectural successor.
Recommended
Recommended Products Summary
Engineering reference data for S912XDT256F1CAL — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | S912XET256J2VAG | MC9S12XDT256CAG | S912XDP512J1MAL | S912XET512BMAGR |
|---|---|---|---|---|---|
| Package | 112-LQFP (20x20 mm) | 112-LQFP (20x20 mm) - same | 112-LQFP (20x20 mm) - same | 112-pin QFP (verify code J1) | 112-LQFP (verify - MAG suffix may indicate MAPBGA) |
| Brand | NXP Semiconductors (Freescale) | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors (Freescale) | NXP Semiconductors |
| Core / Architecture | HCS12X (S12X), 16-bit CISC | S12XE, 16-bit | HCS12X (S12X), 16-bit CISC | HCS12X (S12XD), 16-bit | S12XE, 16-bit |
| Max Speed | 80 MHz | 80 MHz | 80 MHz | 80 MHz | 80 MHz |
| Flash Memory | 256KB | 256KB | 256KB | 512KB | 512KB |
| Lifecycle Status | End of Life (per NXP) | Active (S12XE family) | Same S12XD EOL exposure | EOL (S12XD family) | Active (S12XE family) |
Key Differentiators
- Smallest 256KB Flash footprint in the S12XD 80 MHz family (vs MC9S12XDT512MAA)
- Automotive qualified with industrial temperature range (vs MC9S12XDT256CAG)
- Honest trade-off: EOL status vs S12XE successors (vs S912XET256J2VAG)
Design Notes
The S912XDT256F1CAL is End of Life per the NXP product page. Before starting any new board design, execute a last-time-buy analysis: sum lifetime field-service requirements plus yield margin, then compare against available broker stock on TrustedParts-listed distributors. EOL automotive MCUs are a frequent counterfeit target, so require certificates of conformance and, where possible, date-code traceability to Freescale/NXP original production rather than remarked parts.
The 112-LQFP (20x20 mm) gull-wing package requires a standard LQFP-112 land pattern with approximately 0.5 mm pitch. Place 100 nF ceramic decoupling capacitors at each VDD pin pair, positioned within 2-3 mm of the supply pins, plus one bulk capacitor (4.7-10 uF) near the regulator. For in-cabin automotive environments, keep the crystal and its load capacitors close to the oscillator pins and guard them with ground pour to reduce EMI susceptibility. Verify the exact power-pin map against the S12XD data sheet (1348 pages) rather than copying from smaller S12 variants.
The device operates from 2.5 V (core) and 5 V (I/O) supply domains per distributor data. When migrating between same-family variants (256KB/384KB/512KB), supply requirements are shared, but always confirm the supply sequencing and voltage-tolerance table in the S12XD data sheet for the specific ordering grade. In automotive designs, protect the 5 V rail with load-dump-rated transient suppression ahead of the local regulator, since the MCU's absolute maximum ratings do not account for vehicle transients on their own.
Compliance Information
Listed as Automotive Qualified on the NXP product page and TrustedParts. RoHS/REACH/lead-free status was not stated in the retrieved data - check the NXP product page Environmental Quality section.
