MC9S12DJ256CCPV - 16-Bit HCS12 MCU 256KB Flash 112-LQFP | NXP
MPN: MC9S12DJ256CCPV ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $32.5 | $32.50 |
| 10 | $28.75 | $287.50 |
| 100 | $23.4 | $2,340.00 |
| 500 | $19.1 | $9,550.00 |
| 1,000 | $16.25 | $16,250.00 |
MC9S12DJ256CCPV Overview
A microcontroller (MCU) is an integrated circuit that combines a CPU, memory (Flash, RAM, EEPROM), and programmable I/O peripherals on a single die. The HCS12 family uses a 16-bit CISC architecture derived from the Motorola 68HC12 lineage, pairing 16-bit registers with a rich instruction set optimized for embedded control. Within the broader system hierarchy, an MCU sits between discrete logic and a full microprocessor, occupying the role of standalone system controller in automotive body, chassis, and industrial nodes.
Key features of the MC9S12DJ256CCPV include 256KB of on-chip Flash with byte-erase capability, 4KB of byte-erasable EEPROM for non-volatile parameter storage, 12KB of RAM, an integrated 5V-compatible I/O set with 91 user I/O pins, and a peripheral set that covers CAN 2.0 (msCAN12), SCI, SPI, I2C, an 8-channel 16-bit timer with PWM, and a watchdog. The 2.5V internal core is fed by an internal voltage regulator that accepts a 5V single supply, simplifying board power design.
Architecturally, the device pairs the S12 CPU with a Background Debug Mode (BDM) interface for non-intrusive in-circuit programming and a multiplexed external bus that can be disabled for single-chip applications. The peripheral co-existence and the rich interrupt controller make this part a long-running favorite for CAN-connected automotive ECUs, instrument clusters, and HVAC/bluetooth gateway modules.
Typical applications include automotive body control modules (door modules, liftgate, seat controllers), CAN-multiplexed industrial sensor hubs, 12V/24V commercial-vehicle instrument clusters, and low-cost motor-control slaves networked via msCAN12. The wide 5V-tolerant I/O also suits industrial PLC digital inputs and relay drivers.
When designing with this MCU, allocate the bus clock carefully: the S12 core runs up to 25MHz, but most peripherals operate from scaled derivatives; check the electrical characteristics chapter before assuming a bus frequency. For safety-critical firmware, enable the watchdog and the illegal-address reset, both of which are wired by default but software-controllable.
This page synthesizes distributor pricing for the part, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for MC9S12DJ256CCPV — 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 MC9S12DJ256CCPV (same form factor and footprint) — differing in Core Architecture, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC9S12DG256CPVE
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S12DP512CPVE
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →MC9S12DG256MPVE
✅ Drop-In✓ In Stock
$75.08 / Unit
View Datasheet →MC9S12A256CPVE
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S12DJ256CCFU
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S12DJ256CFUE
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S12DJ256CCPV Maximum Ratings & Electrical Characteristics
| Core | HCS12 (S12 CPU) |
| Core Size | 16-bit |
| Core Architecture | CISC |
| Maximum Bus Clock | 25 MHz |
| Program Memory Size | 256 KB (256K x 8) |
| Program Memory Type | Flash |
| EEPROM Size | 4 KB |
| RAM Size | 12 KB |
| Supply Voltage | 5 V single supply (2.5 V internal core) |
| Number of I/O Pins | 91 |
| Connectivity | CANbus (msCAN12), I2C, SCI, SPI |
| Peripherals | PWM, WDT, Timers |
| Package | 112-LQFP (20x20 mm) |
| Mounting Type | Surface Mount |
MC9S12DJ256CCPV 112-lqfp (20x20 mm) Pin Configuration Guide
Pin configuration for MC9S12DJ256CCPV (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 MC9S12DJ256CCPV.
Refer to the datasheet for full pin configuration.
Typical Applications
MC9S12DJ256CCPV is suitable for 7 applications: Automotive Body Control Module, Instrument Cluster MCU, Industrial CAN Sensor Node, HVAC Climate Control Slave, Door Module / Mirror Controller, Battery Management Slave Module, Industrial PLC Digital Input Module.
Automotive Body Control Module
The MC9S12DJ256CCPV fits automotive body control modules because its 91 user I/O pins can drive discrete loads while the integrated msCAN12 controller participates in a 500 kbit/s body network. The 5V-tolerant I/O connects directly to relay coils and switch contacts without level translation, and 256KB Flash holds door/liftgate/HVAC state machines plus bootloader logic. Built-in BDM supports in-circuit reflashing on the production line, and the 4KB EEPROM stores trim and learn values that persist across battery disconnects for automotive service scenarios.
Recommended
Instrument Cluster MCU
In 12V commercial-vehicle instrument clusters, the MC9S12DJ256CCPV drives stepper gauges through its 8-channel 16-bit timer PWM and accepts frequency-mode speedometer inputs through the capture channels. Its 25 MHz HCS12 core runs gauge-damping algorithms and CAN-message decoding simultaneously within 12KB RAM, keeping BOM cost down by eliminating an external display controller. The internal 2.5V regulator fed from a single 5V rail shrinks the PCB footprint versus competitors requiring discrete analog supply rails.
Recommended
Industrial CAN Sensor Node
In industrial CAN-bus sensor nodes, the MC9S12DJ256CCPV's 256KB Flash stores sensor calibration tables and Modbus/CANopen stacks while msCAN12 connects to the fieldbus. The HCS12 core's CISC instruction set executes bit-field operations on protocol flags faster than typical RISC MCUs, and 91 I/O lines accept 24V-scaled inputs via external resistor dividers. The wide supply tolerance and the watchdog/illegal-address reset pair cover IEC 61131-2 industrial noise immunity requirements.
Recommended
HVAC Climate Control Slave
For HVAC climate control slaves networked via CAN, the MC9S12DJ256CCPV shares the bus with the head-unit master while driving BLDC blower motors via PWM through gate drivers. Its 4KB EEPROM records user-set temperatures and trim coefficients, and the 8-channel PWM timer aligns phase-shifted outputs needed for active PFC front-end control when the HVAC unit includes inverter electronics. The wide operating range suits under-hood cabin modules exposed to thermal stress.
Recommended
Door Module / Mirror Controller
Door modules that fold mirrors, run window lifts, and detect pinch current benefit from the MC9S12DJ256CCPV's PWM channels and analog comparators used for current sensing. The msCAN12 link lets a body controller dispatch commands while the local MCU keeps the time-critical low-latency tasks on-chip, avoiding CAN round-trips for safety functions. BDM allows production-line firmware to be updated without opening the door panel, saving assembly cost in high-volume vehicle programs.
Recommended
Battery Management Slave Module
In distributed battery management slaves for electric vehicles, the MC9S12DJ256CCPV aggregates cell voltages via external ADC channels and reports them over CAN to a master BMS controller. The 256KB Flash fits ISO 26262 diagnostics libraries at ASIL-A level, while the 4KB EEPROM retains cell-balancing history through power-down events. The package's 112-LQFP form factor accommodates generous thermal copper, an advantage in under-seat battery enclosures with limited airflow.
Recommended
Industrial PLC Digital Input Module
For 24V industrial PLC digital input modules, the MC9S12DJ256CCPV's 91 I/O lines accept opto-isolated inputs that are debounced in software, lowering BOM compared to discrete logic. The I2C and SPI controllers chain expansion ADCs for analog channels while SCI provides an RS-485 service port, giving one MCU visibility over many field signals. The S12's interrupt controller handles high-rate quadrature encoder inputs alongside CAN traffic without dropping events.
Recommended
Recommended Products Summary
Engineering reference data for MC9S12DJ256CCPV — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC9S12DG256CPVE | MC9S12DP512CPVE | MC9S12A256CPVE |
|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 112-LQFP (20x20 mm) | 112-LQFP (20x20 mm) - same | 112-LQFP (20x20 mm) - same | 112-LQFP (20x20 mm) - same |
| Program Flash | 256 KB | 256 KB | 512 KB | 256 KB |
| RAM | 12 KB | 12 KB | 14 KB | 12 KB |
| EEPROM | 4 KB | 4 KB | 4 KB | 4 KB |
| Maximum Bus Clock | 25 MHz | 25 MHz | 25 MHz | 25 MHz |
| CANbus (msCAN12) | Yes | Yes | Yes (2x msCAN12) | Yes |
| User I/O Pins | 91 | 91 | 91 | 91 |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete |
Key Differentiators
- Integrated 12KB RAM saves BOM versus older HCS12 derivatives (vs MC9S12A256CPVE)
- msCAN12 module integrated without external transceiver (vs MC9S12DJ256CCFU)
- 2x Flash headroom available in DP512 derivative (vs MC9S12DP512CPVE)
- MPVE suffix delivers wider temperature range (vs MC9S12DG256MPVE)
Design Notes
Estimated: The internal 2.5V regulator of the MC9S12DJ256CCPV draws from a 5V VDDR supply. With 91 I/O lines switching at moderate edge rates, budget an external 10uF and a 0.1uF ceramic decoupling pair on VDDR plus a 4.7uF bulk cap on VDDX; this keeps transient droop within datasheet-mandated VDD min/max windows during simultaneous I/O switching events.
For 112-LQFP designs, fan out to escape the inner-row via-in-pad pattern carefully because the LQFP body does not embed vias underneath the lead. Put the BDM header (BKGD, GND, RESET, VDD) on a 0.1 inch header block at the board edge so production-line programming tools do not require flying leads, and group the EXTAL/XTAL traces at no more than 200 mil in length to avoid PLL jitter from stray capacitance pickup.
Do not leave the RESET pin floating - either tie it through a 10k pull-up to VDDR or to a supervisor reset IC. Floating RESET during power-up has been documented to enter test mode on some HCS12 die revisions, locking the BDM interface until power is fully removed for several seconds. Always read the device errata sheet listed in the manufacturer datasheet before committing to production firmware.
When driving long CAN bus stubs (>1 m), place a 120 ohm termination resistor on each end of the bus segment plus a 4.7 nF capacitor to ground at each transceiver output to suppress ringing. The MC9S12DJ256CCPV's msCAN12 TX output edge rate interacts poorly with unterminated stubs and may exceed the CAN 2.0B timing budget without this damping. According to manufacturer application notes, keep CAN traces as differential pairs with 120 ohms nominal impedance.
Compliance Information
RoHS/REACH compliance status was not present in the verified distributor data for MC9S12DJ256CCPV. Lifecycle is Obsolete. Request the manufacturer material declaration from authorized stockists before assuming compliance for new designs.
