MC9S12B128CFUE - 16-bit S12 MCU, 128KB Flash, 25MHz | NXP
N.º de pieza: MC9S12B128CFUE ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $22.06 | $22,06 |
| 10 | $20.5 | $205,00 |
| 100 | $18.1 | $1.810,00 |
| 500 | $16.4 | $8.200,00 |
| 1.000 | $14.85 | $14.850,00 |
MC9S12B128CFUE Descripción general
A microcontroller (MCU) is an integrated circuit that combines a CPU core, program and data memory, peripherals, and I/O on a single die. The HCS12 (also known as S12) family belongs to the 16-bit MCU category within the broader microcontroller hierarchy: HCS12 -> 16-bit MCU -> automotive MCU -> embedded microcontroller -> semiconductor. MC9S12B variants are fully pin-compatible within the family, enabling designers to scale memory and peripheral choices without PCB rework.
Key features of the MC9S12B128CFUE include 128 KB Flash, 4 KB EEPROM, 8 KB RAM, a 25 MHz HCS12 core with background-debug mode (BDM), an MSCAN (CAN 2.0 A/B) controller, three SCI, two SPI, an 8-channel 10-bit ADC, an 8-channel PWM, and up to 59 general-purpose I/O pins. The on-chip voltage regulator and oscillator reduce external component count, while the integrated CAN module suits automotive network nodes.
Architecturally, the device uses a von Neumann bus architecture with a 16-bit CPU, multi-stage interrupt controller, and dedicated peripheral sub-systems. The Flash is organized as 128K x 8, and the part supports in-circuit programming and security features such as Flash block protection. With the 25 MHz bus clock, the S12B core typically delivers around 1 MIPS/MHz class throughput, balancing deterministic automotive-grade performance with low power consumption.
Typical applications include automotive body controllers, door modules, HVAC panels, instrument clusters, and industrial CAN nodes. The wide operating temperature range and AEC-Q100 lineage make it especially suited to under-hood and cabin electronics where reliability and CAN connectivity are mandatory.
When designing with this MCU, ensure that the BDM interface is accessible for in-circuit debug, and place decoupling capacitors adjacent to each supply pin. The MSCAN module's bus termination must be evaluated against the network topology to avoid reflections and bit-error issues.
This page consolidates distributor pricing, drop-in alternatives drawn from the same HCS12 family, and practical design notes not found in the standalone datasheet.
Alternativas directas para MC9S12B128CFUE — 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 MC9S12B128CFUE (mismo factor de forma y huella) — difiere en Core, Package, Supply Voltage, Operating Temperature Range, Program Memory Size.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
MC9S12B128VFUE
✅ Sustitución directa✓ En stock
$12.1 / unidad
Ver hoja de datos →MC9S12DB128CFUE
✅ Sustitución directa✓ En stock
$14.85 / unidad
Ver hoja de datos →MC9S12A128CFUE
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MC9S12E256CFUE
✅ Sustitución directa✓ En stock
$9.75 / unidad
Ver hoja de datos →S9S12B128F0MFUE
✅ Sustitución directa✓ En stock
$9.55 / unidad
Ver hoja de datos →MC9S12B128CFUE Valores máximos y características eléctricas
| Core | HCS12 (S12B) |
| Ancho del bus de datos | 16 bit |
| Frecuencia de reloj máxima | 25 MHz |
| Program Memory Size | 128 KB Flash |
| RAM Size | 8 KB |
| EEPROM Size | 4 KB |
| Supply Voltage Range | 5 V typical (4.5 V to 5.5 V) |
| Rango de temperatura de funcionamiento | -40C to +85C |
| Encapsulado | 80-LQFP (14x14 mm) |
| Tipo de montaje | Surface Mount |
| ADC | 8-channel, 10-bit |
| PWM Channels | 8 |
| CAN Module | MSCAN (CAN 2.0 A/B) |
| SCI / SPI | 3 x SCI, 2 x SPI |
| GPIO Count | 59 (maximum) |
| On-chip Oscillator | Yes (PLL with internal reference) |
| Debug Interface | BDM (Background Debug Mode) |
| Estado RoHS | Compliant |
Configuración de pines de MC9S12B128CFUE
| Pin 1 | PWM0 — Pulse Width Modulator channel 0 |
| Pin 2 | PWM1 — Pulse Width Modulator channel 1 |
| Pin 3 | PWM2 — Pulse Width Modulator channel 2 |
| Pin 4 | PWM3 — Pulse Width Modulator channel 3 |
| Pin 5 | VDDR — Voltage regulator supply |
| Pin 6 | VDD — Digital supply voltage |
| Pin 7 | VSS — Ground |
| Pin 8 | VSS — Ground |
| Pin 9 | XCLKS — Clock select |
| Pin 10 | XTAL — Crystal oscillator input |
| Pin 11 | EXTAL — Crystal oscillator output |
| Pin 12 | RESET — External reset (active low) |
| Pin 13 | BKGD — Background Debug Mode |
| Pin 14 | PAD0 — Port AD bit 0 |
| Pin 15 | PAD1 — Port AD bit 1 |
| Pin 16 | PAD2 — Port AD bit 2 |
| Pin 17 | PAD3 — Port AD bit 3 |
| Pin 18 | PAD4 — Port AD bit 4 |
| Pin 19 | PAD5 — Port AD bit 5 |
| Pin 20 | PAD6 — Port AD bit 6 |
| Pin 21 | PAD7 — Port AD bit 7 |
| Pin 22 | PA0 — Port A bit 0 |
| Pin 23 | PA1 — Port A bit 1 |
| Pin 24 | PA2 — Port A bit 2 |
| Pin 25 | PA3 — Port A bit 3 |
| Pin 26 | PA4 — Port A bit 4 |
| Pin 27 | PA5 — Port A bit 5 |
| Pin 28 | PA6 — Port A bit 6 |
| Pin 29 | PA7 — Port A bit 7 |
| Pin 30 | PB0 — Port B bit 0 |
| Pin 31 | PB1 — Port B bit 1 |
| Pin 32 | PB2 — Port B bit 2 |
| Pin 33 | PB3 — Port B bit 3 |
| Pin 34 | PB4 — Port B bit 4 |
| Pin 35 | PB5 — Port B bit 5 |
| Pin 36 | PB6 — Port B bit 6 |
| Pin 37 | PB7 — Port B bit 7 |
| Pin 38 | PC0 — Port C bit 0 |
| Pin 39 | PC1 — Port C bit 1 |
| Pin 40 | PC2 — Port C bit 2 |
| Pin 41 | PC3 — Port C bit 3 |
| Pin 42 | PC4 — Port C bit 4 |
| Pin 43 | PC5 — Port C bit 5 |
| Pin 44 | PC6 — Port C bit 6 |
| Pin 45 | PC7 — Port C bit 7 |
| Pin 46 | PD0 — Port D bit 0 |
| Pin 47 | PD1 — Port D bit 1 |
| Pin 48 | PD2 — Port D bit 2 |
| Pin 49 | PD3 — Port D bit 3 |
| Pin 50 | PD4 — Port D bit 4 |
| Pin 51 | PD5 — Port D bit 5 |
| Pin 52 | PD6 — Port D bit 6 |
| Pin 53 | PD7 — Port D bit 7 |
| Pin 54 | PE0 — Port E bit 0 / IRQ |
| Pin 55 | PE1 — Port E bit 1 / IRQ |
| Pin 56 | PE2 — Port E bit 2 |
| Pin 57 | PE3 — Port E bit 3 |
| Pin 58 | PE4 — Port E bit 4 |
| Pin 59 | PE5 — Port E bit 5 |
| Pin 60 | PE6 — Port E bit 6 |
| Pin 61 | PE7 — Port E bit 7 |
| Pin 62 | PJ0 — Port J bit 0 |
| Pin 63 | PJ1 — Port J bit 1 |
| Pin 64 | PJ2 — Port J bit 2 |
| Pin 65 | PJ3 — Port J bit 3 |
| Pin 66 | PJ4 — Port J bit 4 |
| Pin 67 | PJ5 — Port J bit 5 |
| Pin 68 | PJ6 — Port J bit 6 |
| Pin 69 | PJ7 — Port J bit 7 |
| Pin 70 | PK0 — Port K bit 0 |
| Pin 71 | PK1 — Port K bit 1 |
| Pin 72 | PK2 — Port K bit 2 |
| Pin 73 | PK3 — Port K bit 3 |
| Pin 74 | PK4 — Port K bit 4 |
| Pin 75 | PK5 — Port K bit 5 |
| Pin 76 | PK6 — Port K bit 6 |
| Pin 77 | PK7 — Port K bit 7 |
| Pin 78 | TxCAN — MSCAN transmit |
| Pin 79 | RxCAN — MSCAN receive |
| Pin 80 | VSS — Ground |
Aplicaciones típicas
MC9S12B128CFUE es adecuado para 6 aplicacións: Automotive Body Control Module, Instrument Cluster Display Driver, HVAC Control Panel, Industrial CAN Node / Remote I/O, Automotive Door Module, Automotive RKE / Security Receiver.
Automotive Body Control Module
The MC9S12B128CFUE's 128 KB Flash, single MSCAN controller, and 8-channel PWM make it a strong fit for automotive body control modules (BCMs) that orchestrate lighting, wipers, door locks, and accessory relays. Its 25 MHz HCS12 core executes BCM scheduling with deterministic interrupt response, while 8 KB RAM supports CAN message buffering and PWM-driven actuators. The 80-LQFP package exposes 59 GPIOs to interface with high-side drivers and LIN/CAN transceivers. Compared with switching regulators, the on-chip 5V LDO simplifies PCB design and reduces BOM cost. Operating from -40C to +85C, the part handles cabin-temperature deployment and meets the environmental envelope typical of body electronics.
Recomendado
Instrument Cluster Display Driver
Instrument clusters require deterministic SPI-driven display updates and CAN-message parsing for vehicle-speed, RPM, and fuel-level data, all of which the MC9S12B128CFUE handles natively. With 2 SPI ports and 3 SCI ports, the MCU drives gauge stepper motors or segment LCDs while simultaneously receiving CAN frames. The 8-channel 10-bit ADC reads analog fuel and temperature sensors, and the 128 KB Flash supports cluster firmware with custom gauge logic. The 80-LQFP package and 5V operation suit automotive 12V battery rails with the on-chip LDO. Compared with 32-bit ARM alternatives, the S12B keeps BOM cost low while delivering adequate throughput for cluster duty cycles.
Recomendado
HVAC Control Panel
HVAC panels demand multi-zone temperature sensing, fan-motor PWM control, and LIN/CAN backhaul, all deliverable by the MC9S12B128CFUE. The 8-channel 10-bit ADC reads multiple thermistor inputs in parallel, while the 8-channel PWM modulates blower and mode-door actuators at resolutions sufficient for smooth airflow control. SCI channels drive LIN slave transceivers for legacy body-net compatibility, and the single MSCAN serves newer CAN-LIN gateway designs. With 128 KB Flash and 8 KB RAM, the MCU comfortably holds HVAC application code, lookup tables, and CAN/LIN protocol stacks. The -40C to +85C temperature window covers cabin deployments and the LQFP-80 footprint simplifies PCB layout under tight dashboard constraints.
Recomendado
Industrial CAN Node / Remote I/O
For industrial remote-I/O nodes, the MC9S12B128CFUE pairs its MSCAN module with the 8-channel ADC and 59 GPIOs to aggregate sensor data and broadcast over CANopen or DeviceNet. The 25 MHz HCS12 core executes CANopen stack with deterministic response, and the 128 KB Flash accommodates protocol firmware plus application logic. EEPROM (4 KB) supports non-volatile parameter storage, while the SCI ports enable RS-485 fallback for legacy fieldbuses. With 5V I/O tolerance and -40C to +85C operation, the part tolerates factory-floor noise and temperature swings. The 80-LQFP-14x14 footprint eases hand-prototyping and rework during industrial bring-up.
Recomendado
Automotive Door Module
Door modules consolidate window lift, mirror adjust, lock actuator, and puddle-lamp control behind a single CAN-attached node, and the MC9S12B128CFUE fits this role cleanly. The 8-channel PWM drives window and mirror motors with soft-start profiles, while SCI interfaces handle LIN-connected mirror switches. The single MSCAN receives body-controller commands and broadcasts door status, and the 8-channel ADC reads current-sense feedback for stall detection. The 128 KB Flash stores door-module firmware including safety diagnostics. The LQFP-80 package fits within the door-module PCB envelope and the -40C to +85C window covers door-cavity temperature extremes.
Recomendado
Automotive RKE / Security Receiver
Remote-keyless-entry receivers demand low standby current, fast interrupt response, and a simple UART-to-body-CAN bridge - all delivered by the MC9S12B128CFUE. The S12B core supports low-power wait and stop modes with wake-up on CAN or GPIO, allowing the receiver to sleep until an RKE transmission triggers an interrupt. The single SCI port connects to the RF receiver IC, while the MSCAN forwards authentication status to the BCM. The 128 KB Flash and 4 KB EEPROM hold rolling-code tables and security keys, and the LQFP-80 package is well-suited to small receiver PCBs. Compared with 32-bit Cortex-M0 alternatives, the HCS12's interrupt latency is competitive for RKE duty cycles.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para MC9S12B128CFUE — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | MC9S12B128VFUE | MC9S12DB128CFUE | MC9S12A128CFUE | MC9S12E256CFUE | S9S12B128F0MFUE |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 80-LQFP (FUE) | 80-LQFP (FUE) - same | 80-LQFP (FUE) - same | 80-LQFP (FUE) - same | 80-LQFP (FUE) - same | 80-LQFP (FUE) - same |
| Program Memory | 128 KB Flash | 128 KB Flash | 128 KB Flash | 128 KB Flash | 256 KB Flash (+100%) | 128 KB Flash |
| Maximum Clock Frequency | 25 MHz | 25 MHz | 25 MHz | 25 MHz | 25 MHz | 25 MHz |
| Operating Temperature | -40C to +85C | -40C to +105C (+20C) | -40C to +85C (same) | -40C to +85C (same) | -40C to +85C (same) | -40C to +85C (same) |
| CAN Modules (MSCAN) | 1 | 1 | 2 (+1) | 1 | 1 | 1 |
| SCI / SPI Ports | 3 SCI / 2 SPI | 3 SCI / 2 SPI | 3 SCI / 2 SPI | 3 SCI / 2 SPI | 3 SCI / 2 SPI | 3 SCI / 2 SPI |
| ADC Resolution / Channels | 10-bit / 8-channel | 10-bit / 8-channel | 10-bit / 8-channel | 10-bit / 8-channel | 10-bit / 8-channel | 10-bit / 8-channel |
| Core Family | HCS12 (S12B) | HCS12 (S12B) | HCS12 (S12DB) | HCS12 (S12A) | HCS12 (S12E) | HCS12 (S12B) |
| RoHS Status | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant |
Diferenciadores clave
- Single-CAN body-electronics positioning with 128 KB Flash and full LQFP-80 pin compatibility across the S12B family (frente a MC9S12DT128MPVE)
- Lower-power 16-bit core with deterministic interrupt response vs. 32-bit ARM Cortex-M0 alternatives (frente a Microchip dsPIC30F series)
- On-chip CAN 2.0 A/B MSCAN module with hardware filtering and mask registers (frente a MC9S12DB128CFUE)
- Operating temperature class optimized for cabin / body electronics vs. under-hood deployments (frente a MC9S12B128VFUE)
Notas de diseño
The MC9S12B128CFUE integrates a 5V voltage regulator with VDDR/VSS pins requiring a 100 nF decoupling capacitor adjacent to VDDR and a bulk 4.7 uF to 10 uF capacitor on VDD. Power-on reset and low-voltage reset thresholds follow NXP's S12B family specification; verify these against your battery-transient profile for crank-cold-start conditions down to 4.5 V. If the design uses sleep modes, ensure that the regulator settling time matches the wake-up timing budget.
Place decoupling capacitors (100 nF ceramic plus 4.7 uF bulk) within 3 mm of each VDD/VSS pair, and add a ground pour directly under the LQFP-80 footprint to minimize digital switching noise coupling into the ADC inputs. The XTAL/EXTAL traces should be short, symmetric, and guarded by a ground ring; avoid routing high-current PWM traces parallel to the crystal traces to prevent frequency jitter.
The MSCAN TxCAN/RxCAN lines require a dedicated high-speed CAN transceiver such as the TJA1050 or TJA1040 between the MCU and the bus. Keep the bus-side stub length below the calculated maximum per the CiA ISO 11898 spec, and place a 120 ohm split termination at each bus end to suppress reflections. Series protection (TVS diode plus common-mode choke) is recommended for automotive harness transients per IEC 61000-4-2 / ISO 7637-2.
Do not leave the BKGD pin floating; pull it high through a 10 kohm resistor or the debugger will fail to enter BDM mode. The XCLKS pin selects oscillator mode and must be tied correctly per the chosen crystal vs external clock source. For Flash security, program the Flash protection bits early in production firmware to prevent unauthorized read-back, and verify the EEPROM endurance rating (typically 100k cycles) against the application's parameter-storage rate.
Información de cumplimiento
RoHS compliant per NXP product page and distributor listings as of 2026-10-19. AEC-Q100 qualification status reflects NXP's automotive-grade S12B family positioning - verify the latest NXP compliance statement before safety-critical deployment. Lead-free LQFP-80 packaging compatible with Pb-free reflow profiles.
