MC9S12DG256CCFU - 16-bit 25MHz 256KB Flash MCU | NXP
N.º de pieza: MC9S12DG256CCFU ✗ Fin de vida| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $1 | $1,00 |
| 10 | $0.95 | $9,50 |
| 100 | $0.9 | $90,00 |
| 500 | $0.85 | $425,00 |
| 1.000 | $0.8 | $800,00 |
MC9S12DG256CCFU Descripción general
A 16-bit microcontroller (MCU) is a single-chip computer combining a CPU core, memory, and peripherals, positioned within the embedded processor hierarchy below 32-bit MCUs but above 8-bit parts. The HCS12 (S12) family descends from the legendary 68HC11 architecture, upgraded to a 16-bit CISC core with Flash memory and PLL-based frequency multiplication, making it a mainstay of automotive body electronics and industrial control since the early 2000s.
Key features include the 256KB on-chip Flash supporting bootloaders and large application code, dual CAN 2.0 A/B controllers for multiplexed vehicle networks, and a 5V-tolerant I/O structure that simplifies interfacing with legacy automotive sensors and actuators. The 25 MHz core speed with internal PLL allows low-EMI clock generation from a modest crystal.
Architecturally, the S12 CPU executes the HC11-superset instruction set with additional indexed addressing modes, while the interrupt-driven peripheral set (SCI, SPI, IIC, ECT, PWM, ADC) reduces CPU overhead. The part operates over the standard commercial/industrial temperature range per its speed-grade suffix (CC = 25 MHz, 0C to +70C class). At 5V supply it delivers robust noise margins suited to harsh electrical environments.
Typical applications include automotive body control modules, instrument clusters, gateways between CAN networks, industrial PLCs, and motor control panels where CAN connectivity and 5V I/O are mandatory.
Design consideration: verify availability early - this part is listed as obsolete/NRND by NXP, so new designs should target S12XE or SPC5 successors, and existing designs should secure lifetime-buy stock.
This page synthesizes distributor pricing, pin-compatible alternatives, lifecycle status, and design notes not found in a single manufacturer datasheet.
Alternativas directas para MC9S12DG256CCFU — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con MC9S12DG256CCFU (mismo factor de forma y huella) — difiere en Package, Operating Temperature, RAM Size, EEPROM Size, Connectivity.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
MC9S12DG256BVPV
✅ Sustitución directa✓ En stock
$15.6 / unidad
Ver hoja de datos →MC9S12DG256CCPV
✅ Sustitución directa✓ En stock
$18.2 / unidad
Ver hoja de datos →MC9S12A256CFUE
✅ Sustitución directa✓ En stock
$47.08 / unidad
Ver hoja de datos →MC9S12DT128MPVE
✅ Sustitución directa✓ En stock
$36.5 / unidad
Ver hoja de datos →MC9S12DG128MPV
✅ Sustitución directa✓ En stock
Consulte el precio
Ver hoja de datos →MC9S12E256CFUE
✅ Sustitución directa✓ En stock
$9.75 / unidad
Ver hoja de datos →MC9S12XDT256CAG
✅ Sustitución directa✓ En stock
$17.4 / unidad
Ver hoja de datos →MC9S12DG256CCFU Valores máximos y características eléctricas
| Core Processor | HCS12 |
| Core Size | 16-bit |
| Architecture | CISC |
| Maximum Clock Speed | 25 MHz |
| Program Memory Size | 256KB (256K x 8) |
| Program Memory Type | FLASH |
| EEPROM Size | 4KB (4K x 8) |
| RAM Size | 12KB (12K x 8) |
| Tensión de alimentación | 2.5V / 5V |
| Connectivity | CANbus, I2C, SCI, SPI |
| Peripherals | PWM, WDT, ECT timer |
| ADC Resolution | 10-bit, 2 x 8-channel |
| Number of I/O | 59 |
| Encapsulado | 80-QFP (14x14 mm), LQFP |
| Tipo de montaje | Surface Mount |
| Part Status | Obsolete / NRND per manufacturer |
| Series | HCS12 / MC9S12DG256 (S12D family) |
Guía de configuración de pines de MC9S12DG256CCFU 80-qfp (14x14 mm), lqfp
Configuración de pines para MC9S12DG256CCFU (encapsulado 80-qfp (14x14 mm), lqfp). Este CI digital incluye GPIO, interfaces de comunicación (UART, SPI, I2C) y pines de alimentación. Consulte la hoja de datos del fabricante para conocer las funciones alternativas de los pines y las opciones de configuración. Esencial para el diseño de sistemas embebidos y el diseño de PCB.
No hay datos detallados de patillaje disponibles para MC9S12DG256CCFU.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
MC9S12DG256CCFU es adecuado para 6 aplicacións: Automotive Body Control Modules, CAN Network Gateways, Instrument Clusters, Industrial PLC and Machine Control, Motor Control Panels, Telematics and Fleet Tracking Retrofits.
Automotive Body Control Modules
The MC9S12DG256CCFU fits body control modules (BCM) because it was explicitly designed for automotive multiplexing: dual CAN 2.0 A/B controllers link door, lighting, and wiper zones onto the vehicle bus, while 59 I/O lines drive relays and lamps directly from a 5V-tolerant port structure. The 256KB Flash accommodates complete BCM firmware including diagnostics and UDS-class loaders, and the 4KB EEPROM stores wear-leveled calibration and fault data across power cycles. Two 8-channel 10-bit ADCs digitize switch atrix and analog sensor inputs without external parts. In a typical topology the MCU sits between the CAN transceivers and high-side driver ICs, its watchdog (WDT) providing the fail-safe monitor required in safety-relevant loads. The trade-off versus modern parts is lifecycle status - the die is obsolete, so BCM programs should validate an S12XE migration path.
Recomendado
CAN Network Gateways
CAN gateway nodes benefit from the DG256's two independent CAN 2.0 A/B controllers, which bridge different network segments (for example a 500 kbit/s powertrain bus and a 125 kbit/s comfort bus) with hardware message buffering. The 25 MHz HCS12 core executes gateway routing tables and protocol conversion, while 12KB RAM buffers message queues during burst traffic. The 256KB Flash leaves headroom for OBD service handlers and flash-update bootloaders - important because gateways are the natural flash-update entry point in a vehicle. The 5V I/O structure interfaces legacy transceivers such as MC33390-class parts without level shifting. Performance consideration: routing latency depends on SCI/CAN interrupt service efficiency; the S12X successors with XGATE offload this better, so keep worst-case message rates below a few thousand frames per second on this part.
Recomendado
Instrument Clusters
Instrument clusters use the MC9S12DG256CCFU to combine stepper-motor gauge drive, LCD/indicator control, and CAN reception of vehicle-speed and engine data in one 5V MCU. The 8-channel PWM peripheral generates the duty-cycles for gauge drivers and backlight dimming, while the two 10-bit ADCs read fuel-level potentiometers and supply-rail monitors. The 256KB Flash holds multi-language telltale graphics tables and mileage logs written to the 4KB EEPROM every drive cycle - the EEPROM endurance spec in the datasheet governs the logging frequency. SCI links support diagnostic hand-held testers. Because cluster firmware rarely exceeds 200KB, the DG256 provides comfortable headroom where a DG128 would be tight. The main design constraint is EMC: use the internal PLL with spread-spectrum-friendly crystal layout to keep cluster radiated emissions within automotive limits.
Recomendado
Industrial PLC and Machine Control
In industrial controllers, the MC9S12DG256CCFU acts as the logic engine reading 24V-conditioned inputs, executing ladder or C control logic, and driving outputs via SPI-connected I/O expanders. Its 5V-tolerant, high-drive I/O simplifies optocoupler and relay-driver interfacing, and the SPI bus scales the point count with external shift registers. The 256KB Flash holds interpreters plus application programs, and the 4KB EEPROM retains recipe and retention parameters - sized so a full recipe set typically fits without external serial EEPROM. The watchdog supports the supervised restart behavior expected of PLC-class equipment, and the CAN interface links the controller to factory SCADA gateways. Thermal and noise margins at 5V favor electrically harsh cabinets. Because the part is obsolete, new industrial designs should standardize on S12XE devices while using DG256 stock for service and repair.
Recomendado
Motor Control Panels
The DG256's 8-channel PWM at up to 25 MHz bus-derived resolution drives DC and BLDC motor stages, while the 10-bit ADCs sample current shunts and back-EMF for commutation and protection loops. The enhanced capture timer (ECT) measures hall-sensor or encoder edges in hardware, offloading timing-critical capture from software. A control loop at a few kHz PWM frequency is comfortably within the 25 MHz core's budget, including PI current regulation and CAN reporting to a supervisory node. The 256KB Flash supports field-updatable firmware with a CAN bootloader, and the 4KB EEPROM stores learned commutation offsets. Dead-time insertion and current-limit fast paths are handled in software or simple gate-driver logic; for sensorless FOC with heavier math, the S12X or DSP-family (MC56F) successors are the better fit. Panel EMC benefits from the PLL's programmable clock frequency to move spurs away from sensitive bands.
Recomendado
Telematics and Fleet Tracking Retrofits
Retrofit telematics units value the MC9S12DG256CCFU's dual CAN controllers for passive vehicle-bus listening plus an SCI link to a GSM/GNSS modem, extracting speed, ignition, and diagnostic data without cutting harnesses. The 256KB Flash buffers firmware and configuration sets, and the 4KB EEPROM retains trip logs across power loss, complemented by the 12KB RAM used as a ring buffer between CAN interrupts and modem transmission. The 5V I/O directly supports industry-standard optocoupled CAN inputs found in legacy truck installations. Power design is straightforward from the vehicle 12V rail through a buck regulator to 5V, with the MCU's low-frequency crystal enabling sleep-current budgets suited to always-on tracking. Given the obsolete status, fleet-service producers should hold last-time-buy stock or port to the S12XE family, which preserves the two-CAN architecture and eases firmware reuse.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para MC9S12DG256CCFU — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | MC9S12DG256BVPV | MC9S12DG256CCPV | MC9S12DT128MPVE | MC9S12XDT256CAG |
|---|---|---|---|---|---|
| Package | 80-QFP (14x14 mm) | 80-QFP (14x14 mm) - same | 80-QFP (14x14 mm) - same | 80-QFP (14x14 mm) - same | 80-QFP (14x14 mm) - same |
| Brand | NXP Semiconductors (Freescale/Motorola) | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core / Architecture | HCS12, 16-bit CISC | HCS12, 16-bit CISC | HCS12, 16-bit CISC | HCS12, 16-bit CISC | S12X, 16-bit with XGATE co-processor |
| Flash | 256KB (256K x 8) | 256KB | 256KB | 128KB (-50%) | 256KB |
| CAN Channels | 2 x CAN 2.0 A/B | 2 x CAN 2.0 A/B | 2 x CAN 2.0 A/B | 2 x CAN 2.0 A/B | Multiple CAN (S12X generation) |
| Lifecycle Status | Obsolete | Legacy / limited stock | Legacy / limited stock | Legacy / limited stock | Recommended migration path |
Diferenciadores clave
- Largest Flash in the pin-compatible S12D 80-QFP family (frente a MC9S12DT128MPVE)
- Full DG256 peripheral set with 4KB EEPROM (frente a MC9S12A256CFUE)
- Simpler classic HCS12 software model (frente a MC9S12XDT256CAG)
Notas de diseño
The single biggest program risk on this part is lifecycle, not silicon: the MC9S12DG256CCFU is obsolete and the DG256 family is NRND/legacy, so before committing a design run, verify stock depth for your annual volume and prepare a firmware-compatible migration to the S12XE family (S912XET/S912XEG). Because all S12D members are pin compatible, keeping the PCB on the 80-QFP footprint allows a memory-variant fallback (DG128 or DT128) if DG256 stock runs dry.
Place 100 nF ceramic decoupling capacitors at each VDD/VSS pair of the 80-QFP plus one bulk 10 uF near the regulator output, with short returns to the ground plane. The 14x14 mm LQFP has 0.65 mm pin pitch - route high-speed CAN RX/TX and the crystal traces first, keep the XTAL/EXTAL loop small, and guard the oscillator with a local ground pour. The BDM header (MODC/BDLM pins) should be broken out to a 6-pin test point field for field programming.
The device runs from a 5V rail (with 2.5V-class options per the ordering table), so supply it from an automotive-qualified LDO or pre-regulator with transient suppression for load-dump environments. Estimated: at 25 MHz with typical I/O loading, core current is in the tens-of-milliamps class - budget 100 mA headroom per the datasheet electrical tables and verify thermal rise using the LQFP theta-JA for your board copper area, rather than assuming datasheet worst-case numbers.
CAN nodes on this MCU must terminate the bus at both ends with 120 ohm and keep the transceiver (e.g., an MC33390-class or TJA1050-style part) close to the CANRX/CANTX pins. Bit timing registers must be computed from the actual bus clock after PLL configuration - incorrect prescaler settings are the most common cause of intermittent CAN errors on S12 designs, so validate with the manufacturer's bit-timing guidance before release.
Información de cumplimiento
Compliance data was not present in the provided web results for this legacy part; consult the official NXP product page for the DG256 family environmental qualifications before procurement.
