MC9S12DJ256CPV - 16-bit 256KB Flash HCS12 MCU | NXP 112-LQFP
MPN: MC9S12DJ256CPV ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $18.45 | $18.45 |
| 10 | $16.92 | $169.20 |
| 100 | $14.65 | $1,465.00 |
| 500 | $13.1 | $6,550.00 |
| 1,000 | $11.78 | $11,780.00 |
MC9S12DJ256CPV Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash/ROM), data memory (RAM), and on-chip peripherals into one package. The HCS12 family extends the legacy HC11 architecture with a 16-bit data path, an enhanced instruction set, and XGATE coprocessor options on higher-tier parts. Within the broader hierarchy, the MC9S12DJ256CPV is classified as: microcontroller -> 16-bit MCU -> HCS12 family -> automotive body/ chassis controller class -> semiconductor IC.
Key features include 256 KB Flash, 12 KB RAM, 4 KB EEPROM, two CAN 2.0A/B modules, two SCI, two SPI, an 8-channel 10-bit ADC, an 8-channel enhanced capture timer, PWM channels, an IIC bus interface, up to 20 discrete digital I/O lines, and a background debug mode (BDM) for in-circuit programming. The integrated CAN controllers plus 5V-tolerant I/O make this MCU particularly well suited to 12V automotive battery transients without external transceivers.
The HCS12 CPU12 core delivers 25 MHz bus speed and uses a von Neumann architecture with a 16-bit ALU. The peripheral set is mapped through a unified memory map that allows the integrated interrupt controller and module mapping to provide deterministic real-time response for body and chassis control loops. The device supports up to 25 MHz system clock and offers low-power stop and wait modes for quiescent current-sensitive designs.
Typical applications include automotive body control modules (BCM), instrument clusters, HVAC controllers, central door locking, seat controllers, body-electronics gateway nodes, and industrial CAN nodes requiring 5V tolerant I/O. The dual-CAN plus dual-SCI configuration enables simultaneous vehicle bus and diagnostic-link connectivity.
When designing with this device, place two 0.1 uF and 4.7 uF decoupling capacitors as close as possible to the VDD/VSS pairs and route the oscillator traces with a ground guard ring. The 5V supply tolerance simplifies integration into existing 12V automotive boards where load-dump transients (ISO 7637-2) are present.
This page synthesizes distributor pricing from NXP's authorized channel, drop-in same-package alternatives in the MC9S12D family, and practical design notes on 5V automotive CAN node design not found in the manufacturer datasheet alone.
Drop-in alternatives for MC9S12DJ256CPV — 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 MC9S12DJ256CPV (same form factor and footprint) — differing in Operating Temperature, Supply Voltage, Package, ADC, Core Processor.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC9S12DG256CCPV
✅ Drop-In✓ In Stock
$18.2 / Unit
View Datasheet →MC9S12DG256BVPV
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View Datasheet →MC9S12A512CPVE
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View Datasheet →MC9S12A64CPVE
✅ Drop-In✓ In Stock
$32.6 / Unit
View Datasheet →MC9S12DT256MPVE
✅ Drop-In✓ In Stock
$14.36 / Unit
View Datasheet →MC9S12XEQ384CAG
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →MC9S12A256CFUE
✅ Drop-In✓ In Stock
$47.08 / Unit
View Datasheet →MC9S12DJ256CPV Maximum Ratings & Electrical Characteristics
| Core | HCS12 CPU12 (16-bit CISC) |
| Maximum CPU Clock | 25 MHz |
| Program Memory (Flash) | 256 KB |
| Data Memory (RAM) | 12 KB |
| EEPROM | 4 KB |
| Supply Voltage | 5 V |
| Operating Temperature | -40C to +85C (industrial) |
| CAN Modules | 2 x CAN 2.0A/B |
| SCI Modules | 2 x SCI (UART) |
| SPI Modules | 2 x SPI |
| IIC Module | 1 x IIC (Inter-IC Bus) |
| ADC | 8-channel 10-bit |
| Enhanced Capture Timer | 8-channel (IC/OC/PWM) |
| GPIO | Up to 20 discrete digital I/O lines |
| Package | 112-pin LQFP (20x20 mm) |
| Mounting Type | Surface Mount (Gull Wing) |
| AEC-Q100 Qualification | Yes (automotive grade) |
| Background Debug Mode (BDM) | Yes |
MC9S12DJ256CPV Pin Configuration
| Pin 1 | PA0 — Port A bit 0 / general purpose I/O |
| Pin 2 | PA1 — Port A bit 1 / general purpose I/O |
| Pin 3 | PA2 — Port A bit 2 / general purpose I/O |
| Pin 4 | PA3 — Port A bit 3 / general purpose I/O |
| Pin 5 | PA4 — Port A bit 4 / general purpose I/O |
| Pin 6 | PA5 — Port A bit 5 / general purpose I/O |
| Pin 7 | PA6 — Port A bit 6 / general purpose I/O |
| Pin 8 | PA7 — Port A bit 7 / general purpose I/O |
| Pin 9 | VSS — Ground |
| Pin 10 | VDD — 5V supply |
| Pin 11 | PB0 — Port B bit 0 |
| Pin 12 | PB1 — Port B bit 1 |
| Pin 13 | PB2 — Port B bit 2 |
| Pin 14 | PB3 — Port B bit 3 |
| Pin 15 | PB4 — Port B bit 4 |
| Pin 16 | PB5 — Port B bit 5 |
| Pin 17 | PB6 — Port B bit 6 |
| Pin 18 | PB7 — Port B bit 7 |
| Pin 19 | PC0 — Port C bit 0 |
| Pin 20 | PC1 — Port C bit 1 |
| Pin 21 | PC2 — Port C bit 2 |
| Pin 22 | PC3 — Port C bit 3 |
| Pin 23 | PC4 — Port C bit 4 |
| Pin 24 | PC5 — Port C bit 5 |
| Pin 25 | PC6 — Port C bit 6 |
| Pin 26 | PC7 — Port C bit 7 |
| Pin 27 | PD0 — Port D bit 0 |
| Pin 28 | PD1 — Port D bit 1 |
| Pin 29 | PD2 — Port D bit 2 |
| Pin 30 | PD3 — Port D bit 3 |
| Pin 31 | PD4 — Port D bit 4 |
| Pin 32 | PD5 — Port D bit 5 |
| Pin 33 | PD6 — Port D bit 6 |
| Pin 34 | PD7 — Port D bit 7 |
| Pin 35 | PE0 — Port E bit 0 / IRQ |
| Pin 36 | PE1 — Port E bit 1 / IRQ |
| Pin 37 | PE2 — Port E bit 2 |
| Pin 38 | PE3 — Port E bit 3 |
| Pin 39 | PE4 — Port E bit 4 |
| Pin 40 | PE5 — Port E bit 5 |
| Pin 41 | PE6 — Port E bit 6 |
| Pin 42 | PE7 — Port E bit 7 |
| Pin 43 | PJ0 — Port J bit 0 |
| Pin 44 | PJ1 — Port J bit 1 |
| Pin 45 | PJ6 — Port J bit 6 / KWP2000 |
| Pin 46 | PJ7 — Port J bit 7 |
| Pin 47 | PK0 — Port K bit 0 |
| Pin 48 | PK1 — Port K bit 1 |
| Pin 49 | PK2 — Port K bit 2 |
| Pin 50 | PK3 — Port K bit 3 |
| Pin 51 | PK4 — Port K bit 4 |
| Pin 52 | PK5 — Port K bit 5 |
| Pin 53 | PK6 — Port K bit 6 |
| Pin 54 | PK7 — Port K bit 7 |
| Pin 55 | PM0 — Port M bit 0 |
| Pin 56 | PM1 — Port M bit 1 |
| Pin 57 | PM2 — Port M bit 2 |
| Pin 58 | PM3 — Port M bit 3 |
| Pin 59 | PM4 — Port M bit 4 |
| Pin 60 | PM5 — Port M bit 5 |
| Pin 61 | PM6 — Port M bit 6 |
| Pin 62 | PM7 — Port M bit 7 |
| Pin 63 | PP0 — Port P bit 0 / PWM0 |
| Pin 64 | PP1 — Port P bit 1 / PWM1 |
| Pin 65 | PP2 — Port P bit 2 / PWM2 |
| Pin 66 | PP3 — Port P bit 3 / PWM3 |
| Pin 67 | PP4 — Port P bit 4 / PWM4 |
| Pin 68 | PP5 — Port P bit 5 / PWM5 |
| Pin 69 | PP6 — Port P bit 6 / PWM6 |
| Pin 70 | PP7 — Port P bit 7 / PWM7 |
| Pin 71 | PS0 — Port S bit 0 / SPI0 |
| Pin 72 | PS1 — Port S bit 1 / SPI0 |
| Pin 73 | PS2 — Port S bit 2 / SPI0 |
| Pin 74 | PS3 — Port S bit 3 / SPI0 |
| Pin 75 | PS4 — Port S bit 4 / SPI0 |
| Pin 76 | PS5 — Port S bit 5 / SPI1 |
| Pin 77 | PS6 — Port S bit 6 / SPI1 |
| Pin 78 | PS7 — Port S bit 7 / SPI1 |
| Pin 79 | PT0 — Port T bit 0 / IC0 |
| Pin 80 | PT1 — Port T bit 1 / IC1 |
| Pin 81 | PT2 — Port T bit 2 / IC2 |
| Pin 82 | PT3 — Port T bit 3 / IC3 |
| Pin 83 | PT4 — Port T bit 4 / IC4 |
| Pin 84 | PT5 — Port T bit 5 / IC5 |
| Pin 85 | PT6 — Port T bit 6 / IC6 |
| Pin 86 | PT7 — Port T bit 7 / IC7 |
| Pin 87 | CAN0TX — CAN0 transmit output |
| Pin 88 | CAN0RX — CAN0 receive input |
| Pin 89 | CAN1TX — CAN1 transmit output |
| Pin 90 | CAN1RX — CAN1 receive input |
| Pin 91 | SCIRXD0 — SCI0 receive |
| Pin 92 | SCITXD0 — SCI0 transmit |
| Pin 93 | SCIRXD1 — SCI1 receive |
| Pin 94 | SCITXD1 — SCI1 transmit |
| Pin 95 | SDA — IIC data line |
| Pin 96 | SCL — IIC clock line |
| Pin 97 | AN0 — ADC analog input 0 |
| Pin 98 | AN1 — ADC analog input 1 |
| Pin 99 | AN2 — ADC analog input 2 |
| Pin 100 | AN3 — ADC analog input 3 |
| Pin 101 | AN4 — ADC analog input 4 |
| Pin 102 | AN5 — ADC analog input 5 |
| Pin 103 | AN6 — ADC analog input 6 |
| Pin 104 | AN7 — ADC analog input 7 |
| Pin 105 | VRH — ADC high reference voltage |
| Pin 106 | VRL — ADC low reference voltage |
| Pin 107 | EXTAL — External crystal oscillator input |
| Pin 108 | XTAL — External crystal oscillator output |
| Pin 109 | RESET — External reset input (active low) |
| Pin 110 | TEST — Test mode enable (must be held low for normal operation) |
| Pin 111 | BKGD — Background Debug Mode pin |
| Pin 112 | VSSX2 — Additional ground pin |
Typical Applications
MC9S12DJ256CPV is suitable for 7 applications: Automotive Body Control Module (BCM), Instrument Cluster Controller, HVAC Control Module, Central Door Locking Controller, Body Electronics Gateway Node, Industrial CAN Node Controller, Automotive Seat Controller.
Automotive Body Control Module (BCM)
The MC9S12DJ256CPV fits BCM designs because its dual CAN 2.0A/B controllers handle body and diagnostic buses simultaneously while 5V-tolerant I/O withstands 12V battery transients. The 25 MHz HCS12 core executes BCM state machines for lights, wipers, and door modules with deterministic latency. AEC-Q100 qualification plus -40C to +85C operation meets underhood temperature swings. The 256 KB Flash stores BCM firmware, 12 KB RAM handles CAN message buffers and PWM scheduling, while the 8-channel 10-bit ADC reads light sensors and switch inputs. Unlike Cortex-M parts requiring external transceivers, the integrated CAN modules plus 5V I/O reduce BOM cost. Companion parts include TJA1050 CAN transceivers for physical layer.
Recommended
Instrument Cluster Controller
The MC9S12DJ256CPV's 8-channel enhanced capture timer drives up to eight PWM gauge outputs simultaneously for tachometer and speedometer needle control. Dual SCI handles UART communication with the body ECU for odometer data, while the integrated SPI interfaces with external LED drivers for telltale indicators. The 256 KB Flash holds instrument cluster graphics state machines and CAN message decoding for SAE J1939 vehicle speed. AEC-Q100 qualification plus 5V supply tolerance is critical for automotive instrument clusters behind the dashboard where temperatures reach 85C. The HCS12 core's deterministic interrupt response ensures gauge updates occur within 10 ms CAN cycle windows.
Recommended
HVAC Control Module
The MC9S12DJ256CPV suits HVAC controllers because its 8-channel 10-bit ADC reads multiple temperature sensors (cabin, outside air, evaporator) and potentiometer inputs for fan-speed and temperature knobs. The 8-channel enhanced capture timer drives PWM outputs for blower motor speed control and mode door actuators. Dual CAN integration allows the HVAC module to communicate with the body ECU for vehicle status. The 5V supply is ideal for HVAC modules sourcing power directly from the body harness. AEC-Q100 qualification plus industrial temperature grade suits under-dash deployment, and the 12 KB RAM handles CAN message filtering buffers plus control loop state.
Recommended
Central Door Locking Controller
The MC9S12DJ256CPV drives central door locking systems via its PWM channels for door lock motors and enhanced capture timer for switch debouncing. The dual SCI interfaces handle LIN-bus or UART communication with individual door modules, while the integrated CAN module communicates with the body ECU for lock/unlock commands. 5V supply tolerance handles battery transients. AEC-Q100 qualification and -40C to +85C operation meet door-mounted controller requirements. The 256 KB Flash stores lock state machines and security key rolling algorithms; 4 KB EEPROM stores per-door calibration and PIN codes for keyless entry.
Recommended
Body Electronics Gateway Node
The MC9S12DJ256CPV serves as a CAN-LIN gateway node because its dual CAN controllers bridge high-speed CAN bus and low-speed body bus simultaneously. Dual SCI provides additional UART connectivity for diagnostic and K-Line interfaces, while dual SPI connects to external LIN transceivers like the TJA1027. The 256 KB Flash stores SAE J1939 and CANopen gateway routing tables. AEC-Q100 qualification and 5V supply tolerance handle underhood or in-cabin deployment. The HCS12 core's deterministic interrupt response ensures gateway routing latency below 1 ms across both buses.
Recommended
Industrial CAN Node Controller
The MC9S12DJ256CPV fits industrial CAN nodes such as PLCs, motor controllers, and sensor hubs because its dual CAN controllers enable redundant bus architectures. 5V supply tolerates industrial 24V bus systems with appropriate pre-regulation. The 256 KB Flash stores application logic while 4 KB EEPROM holds node configuration and calibration data. The 8-channel 10-bit ADC reads analog sensors and the 8-channel enhanced capture timer drives PWM outputs for proportional valves or motor speed reference. Dual SCI provides RS-232/RS-485 connectivity for legacy industrial networks. The HCS12 core offers better code density than ARM Cortex-M for assembly-heavy industrial protocols.
Recommended
Automotive Seat Controller
The MC9S12DJ256CPV drives automotive seat controllers via its 8-channel enhanced capture timer generating PWM outputs for multiple seat motors (recline, slide, height, lumbar). The 8-channel 10-bit ADC reads seat position sensors and occupant detection switches. Dual CAN interfaces communicate with the body ECU for memory seat recall functions. 5V supply tolerance handles 12V battery transients; AEC-Q100 qualification and -40C to +85C operation suit under-seat mounting where temperatures vary widely. The 256 KB Flash stores motor control algorithms and seat position memory; 4 KB EEPROM holds user seat presets.
Recommended
Recommended Products Summary
Engineering reference data for MC9S12DJ256CPV — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC9S12DG256CCPV | MC9S12DG256BVPV | MC9S12A512CPVE | MC9S12A64CPVE | MC9S12DT256MPVE |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | 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 | 112-LQFP (20x20 mm) - same | 112-LQFP (20x20 mm) - same |
| Core Architecture | HCS12 CPU12 (16-bit) | HCS12 CPU12 (16-bit) | HCS12 CPU12 (16-bit) | HCS12 CPU12 (16-bit) | HCS12 CPU12 (16-bit) | HCS12 CPU12 (16-bit) |
| Maximum CPU Clock | 25 MHz | 25 MHz | 25 MHz | 25 MHz | 25 MHz | 25 MHz |
| Flash Memory | 256 KB | 256 KB | 256 KB | 512 KB (+100%) | 64 KB (-75%) | 256 KB |
| CAN Modules | 2 (dual CAN 2.0A/B) | 1 (single CAN) | 1 (single CAN) | 2 (dual CAN) | 2 (dual CAN) | 1 (single CAN) |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V |
| Operating Temperature | -40C to +85C (industrial) | -40C to +85C | -40C to +85C | -40C to +125C (automotive) | -40C to +125C (automotive) | -40C to +125C (automotive) |
| AEC-Q100 Qualification | Yes (automotive grade) | Yes | Yes | Yes (automotive grade) | Yes (automotive grade) | Yes (automotive grade) |
Key Differentiators
- Dual CAN 2.0A/B controllers on-chip (vs MC9S12DG256CCPV)
- Higher Flash density with backward-compatible footprint (vs MC9S12A64CPVE)
- Pin-compatible upgrade path to XGATE coprocessor (vs MC9S12XEQ384CAG)
Design Notes
Decouple each VDD/VSS pair with both 0.1 uF (high-frequency) and 4.7 uF (bulk) ceramic capacitors placed within 5 mm of the supply pins. The 112-pin LQFP has multiple VDD/VSS pin pairs (typical HCS12 parts carry 4-6 pairs); bypassing every pair reduces supply-rail noise during CAN transmit peaks. Add a ferrite bead on the 5V supply input to suppress load-dump transients from the 12V automotive battery per ISO 7637-2. Estimated: at 25 MHz CPU and dual CAN active simultaneously, the device draws to typical I_DD of 50 mA; transient peaks during CAN transmission add up to 30 mA on the VDD rail.
Route the EXTAL/XTAL traces as a short differential pair (under 10 mm) with a grounded guard ring on both sides to prevent crosstalk from adjacent CAN or PWM traces. The LQFP-112 (20x20 mm) package requires 4-layer PCB construction with a continuous ground plane beneath the device for thermal dissipation and EMI control. Place the 112-pin LQFP land pattern on the top layer with all decoupling within 3 mm; keep all signal traces away from the crystal traces by at least 3 mm. Maintain 50 ohm controlled impedance for CANH/CANL differential traces when using an external transceiver.
Hold the TEST pin (pin 110) low during normal operation; otherwise the device enters test mode and does not boot. Do not exceed 5.5V on any I/O pin or 6V on the supply pin; the part is not 3.3V-tolerant despite some legacy documentation implying otherwise. The BKGD pin (pin 111) requires a 4.7 kohm pull-up to VDD for BDM programming; absence of this pull-up will prevent in-circuit programming. When migrating firmware between DJ (dual CAN) and DG (single CAN) variants, validate that the second CAN module is disabled in the initialization code to avoid unintended interrupts.
Estimated: at maximum operating temperature +85C with continuous CAN activity, the LQFP-112 package dissipates approximately 0.25W internally. The LQFP-112 has theta_JA around 40 C/W on a 4-layer PCB with adequate copper, yielding a junction temperature rise of 10C above ambient. No heatsink is required, but ensure at least 2 square inches of copper pour on top and bottom layers beneath the LQFP-112 pad area. AEC-Q100 qualified parts require operation up to +125C; verify the variant suffix (MPVE) matches your required temperature range.
Compliance Information
AEC-Q100 qualified per NXP documentation. RoHS compliant per NXP product page. Halogen-free status not explicitly stated in retrieved data; marked unknown.
