MCF51AC128ACFUE - 32-bit ColdFire V1 MCU 128KB Flash | NXP
N.º de pieza: MCF51AC128ACFUE ⚠ Última compra| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $19.46 | $19,46 |
| 10 | $17.52 | $175,20 |
| 100 | $15.41 | $1.541,00 |
| 500 | $13.65 | $6.825,00 |
| 1.000 | $12.18 | $12.180,00 |
MCF51AC128ACFUE Descripción general
Key features include the V1 ColdFire core with single-cycle multiply-accumulate (MAC) instructions, an integrated analog chain with up to 16-channel 12-bit ADC, multiple timers including a 6-channel PWM, and communication peripherals covering SCI (UART), SPI, and I2C. The 50 MHz core and 128 KB Flash make it well-matched to industrial control, motor drive, and human-machine interface (HMI) applications that demand real-time deterministic performance.
The MCF51AC family is also notable for its 5V-tolerant I/O and on-chip voltage regulator, supporting 2.7V to 5.5V operation from a single rail. This simplifies power-tree design in 5V-dominated industrial systems. The wide operating range and integrated peripherals position the MCF51AC128ACFUE as a workhorse MCU for mid-range embedded designs.
Typical applications include industrial motor control (BLDC and stepper), smart metering, HVAC control, building automation, point-of-sale terminals, and medical instrumentation. The 12-bit ADC, PWM channels, and SCI/SPI interface are well-suited to closed-loop control loops where deterministic latency is required.
When designing with this MCU, plan oscillator and decoupling layout early: place a 100 nF decoupling cap adjacent to every VDD pin, and route the externally supplied RESET signal with a guard trace. The internal voltage regulator requires a bulk cap on the VREG pin per the manufacturer datasheet typical-application circuit.
The MCF51AC128ACFUE is approaching end-of-life per NXP lifecycle announcements. Engineers designing new platforms should consult the latest NXP PCN documents and evaluate the suggested replacement, the MCF51AC128CCFUE (the 'C' suffix denotes the latest silicon revision). For reference and upgrade planning, this page consolidates distributor pricing, drop-in compatible alternatives, lifecycle status, and PCB design notes not found on a single distributor page.
Alternativas directas para MCF51AC128ACFUE — 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 MCF51AC128ACFUE (mismo factor de forma y huella) — difiere en Package, Series, Core Size, Maximum Clock Frequency, Program Memory Size.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
MCF51AC128CCFUE
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MCF52252CAF66
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$6.75 / unidad
Ver hoja de datos →MCF51AC128ACFUE Valores máximos y características eléctricas
| Core | ColdFire V1 (V1 ColdFire RISC) |
| Core Size | 32-bit single-core |
| Frecuencia de reloj máxima | 50 MHz |
| Program Memory Size | 128 KB (128K x 8) Flash |
| Operating Voltage Range | 2.7 V to 5.5 V |
| Encapsulado | 64-QFP (14x14 mm) |
| Tipo de montaje | Surface Mount |
| ADC | 12-bit (per datasheet) |
| Communication Interfaces | SCI (UART), SPI, I2C |
| Timers | Multiple (per datasheet) |
| Temperatura de funcionamiento | -40C to +85C (industrial) |
| Estado RoHS | Compliant |
| Series | MCF51AC Flexis |
| Lead Free | Yes |
Configuración de pines de MCF51AC128ACFUE
| Pin 1 | PTA0/TCLK1 — Port A bit 0 / Timer channel 1 clock input |
| Pin 2 | PTA1/TCLK2 — Port A bit 1 / Timer channel 2 clock input |
| Pin 3 | PTA2 — Port A bit 2 (GPIO) |
| Pin 4 | PTA3 — Port A bit 3 (GPIO) |
| Pin 5 | PTA4 — Port A bit 4 (GPIO) |
| Pin 6 | PTA5 — Port A bit 5 (GPIO) |
| Pin 7 | PTA6 — Port A bit 6 (GPIO) |
| Pin 8 | PTA7 — Port A bit 7 (GPIO) |
| Pin 9 | PTB0 — Port B bit 0 (GPIO) |
| Pin 10 | PTB1 — Port B bit 1 (GPIO) |
| Pin 11 | PTB2 — Port B bit 2 (GPIO) |
| Pin 12 | PTB3 — Port B bit 3 (GPIO) |
| Pin 13 | PTB4 — Port B bit 4 (GPIO) |
| Pin 14 | PTB5 — Port B bit 5 (GPIO) |
| Pin 15 | PTB6 — Port B bit 6 (GPIO) |
| Pin 16 | PTB7 — Port B bit 7 (GPIO) |
| Pin 17 | VDD — Supply voltage (2.7 V to 5.5 V) |
| Pin 18 | VSS — Ground |
| Pin 19 | PTC0 — Port C bit 0 (GPIO) |
| Pin 20 | PTC1 — Port C bit 1 (GPIO) |
| Pin 21 | PTC2 — Port C bit 2 (GPIO) |
| Pin 22 | PTC3 — Port C bit 3 (GPIO) |
| Pin 23 | PTC4 — Port C bit 4 (GPIO) |
| Pin 24 | PTC5 — Port C bit 5 (GPIO) |
| Pin 25 | PTC6 — Port C bit 6 (GPIO) |
| Pin 26 | PTC7 — Port C bit 7 (GPIO) |
| Pin 27 | PTD0 — Port D bit 0 (GPIO) |
| Pin 28 | PTD1 — Port D bit 1 (GPIO) |
| Pin 29 | PTD2 — Port D bit 2 (GPIO) |
| Pin 30 | PTD3 — Port D bit 3 (GPIO) |
| Pin 31 | PTD4 — Port D bit 4 (GPIO) |
| Pin 32 | PTD5 — Port D bit 5 (GPIO) |
| Pin 33 | PTD6 — Port D bit 6 (GPIO) |
| Pin 34 | PTD7 — Port D bit 7 (GPIO) |
| Pin 35 | PTE0/TXD1 — Port E bit 0 / SCI1 transmit |
| Pin 36 | PTE1/RXD1 — Port E bit 1 / SCI1 receive |
| Pin 37 | PTE2 — Port E bit 2 (GPIO) |
| Pin 38 | PTE3 — Port E bit 3 (GPIO) |
| Pin 39 | PTE4 — Port E bit 4 (GPIO) |
| Pin 40 | PTE5 — Port E bit 5 (GPIO) |
| Pin 41 | PTE6 — Port E bit 6 (GPIO) |
| Pin 42 | PTE7 — Port E bit 7 (GPIO) |
| Pin 43 | VREG — Internal voltage regulator output (decoupling cap required) |
| Pin 44 | VDDA — Analog supply voltage |
| Pin 45 | VSSA — Analog ground |
| Pin 46 | ADC0 — ADC channel 0 input |
| Pin 47 | ADC1 — ADC channel 1 input |
| Pin 48 | ADC2 — ADC channel 2 input |
| Pin 49 | ADC3 — ADC channel 3 input |
| Pin 50 | ADC4 — ADC channel 4 input |
| Pin 51 | ADC5 — ADC channel 5 input |
| Pin 52 | ADC6 — ADC channel 6 input |
| Pin 53 | ADC7 — ADC channel 7 input |
| Pin 54 | XTAL — Crystal oscillator input |
| Pin 55 | EXTAL — Crystal oscillator feedback / external clock input |
| Pin 56 | VSS — Ground |
| Pin 57 | VDD — Supply voltage (2.7 V to 5.5 V) |
| Pin 58 | RESET — External reset input (active low) |
| Pin 59 | BKGD/MS — Background Debug Mode / Mode Select |
| Pin 60 | IRQ — External interrupt request input |
| Pin 61 | RSTOUT — Reset output (open-drain) |
| Pin 62 | PWM0 — PWM channel 0 output |
| Pin 63 | PWM1 — PWM channel 1 output |
| Pin 64 | PWM2 — PWM channel 2 output |
Aplicaciones típicas
MCF51AC128ACFUE es adecuado para 6 aplicacións: Industrial BLDC Motor Control, Smart Metering, HVAC Climate Control, Building Automation Controllers, Point-of-Sale Terminals, Medical Instrumentation (Non-Life-Critical).
Industrial BLDC Motor Control
The MCF51AC128ACFUE is well suited to industrial BLDC and PMSM motor control drives using its 50 MHz ColdFire V1 core with single-cycle MAC instructions for field-oriented control (FOC) firmware. The integrated 12-bit ADC samples phase currents, while the 6-channel PWM block drives a three-phase inverter with deterministic switching up to 50 MHz core clock. The 128 KB Flash holds FOC state machine, commutation tables, and fault-handling code; the wide 2.7-5.5V supply range supports 5V and 3.3V mixed-rail motor power boards. Engineers should confirm AEC-Q100 was not selected for this industrial-only drive.
Recomendado
Smart Metering
The MCF51AC128ACFUE drives single- and multi-phase smart electricity meters, gas meters, and water meters through its 12-bit ADC (for current/voltage sensing), multiple timers (for metrology calculation), and SCI/SPI/I2C peripherals (for PLC or wireless M-Bus communication modules). The 50 MHz ColdFire V1 core handles energy-calculation algorithms, while the 128 KB Flash stores metrology firmware, calibration constants, and DLMS/COSEM communication stacks. The wide 2.7-5.5 V supply range and integrated voltage regulator simplify designs powered directly from the meter's line-derived supply.
Recomendado
HVAC Climate Control
The MCF51AC128ACFUE is well-matched to residential and light-commercial HVAC controllers: the 12-bit ADC reads thermistor temperature sensors, the PWM block drives TRIAC-controlled blower fans and dampers, and the I2C peripheral connects to wall-mounted keypads and display modules. The 128 KB Flash supports zoning firmware, scheduling, and Modbus/FCU bus communication. Operating from -40C to +85C industrial range and 2.7-5.5 V supply, the part handles unconditioned 24 VAC-derived HVAC power rails with minimal external regulation.
Recomendado
Building Automation Controllers
Building automation controllers (BACnet/Modbus nodes, lighting controllers, occupancy hubs) use the MCF51AC128ACFUE to consolidate multiple communication interfaces (SCI, SPI, I2C), handle digital I/O scanning, and run control logic at 50 MHz ColdFire V1 determinism. The 128 KB Flash accommodates BACnet/Modbus stacks, scheduling, and OTA update handlers. The wide 2.7-5.5 V supply and -40C to +85C industrial temperature range qualify it for plenum-rated enclosures and unheated mechanical rooms.
Recomendado
Point-of-Sale Terminals
POS terminals use the MCF51AC128ACFUE to manage keypad scanning, thermal-printer control (via UART/SPI), Ethernet or GSM modem interfaces (via SPI-peripheral expansion), and secure PIN entry (via I2C cryptographic companion IC). The 32-bit ColdFire V1 core at 50 MHz handles protocol stack encryption and printer formatting simultaneously, while 128 KB Flash stores terminal firmware with multilingual string tables. The wide 2.7-5.5 V supply draws from regulated 5 V rails inside the POS chassis without additional conditioning.
Recomendado
Medical Instrumentation (Non-Life-Critical)
Non-life-critical medical instruments - including benchtop analyzers, laboratory pipette controllers, and patient monitors for ancillary telemetry - use the MCF51AC128ACFUE for ADC-based sensor readout, PWM-driven actuator control, and SCI-based data export to host PCs. The 50 MHz ColdFire V1 core handles real-time filtering, while the 128 KB Flash stores calibration constants and instrument parameters. Note the part is industrial-grade (not IEC 60601 rated); for direct-patient-contact devices, validate against IEC 60601 isolation and creepage requirements separately.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para MCF51AC128ACFUE — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | MCF51AC128CCFUE | MCF51AC256BCLKE | MCF52252CAF66 |
|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core | ColdFire V1 | ColdFire V1 | ColdFire V1 | ColdFire V2 |
| Maximum Clock Frequency | 50 MHz | 50 MHz | 50 MHz | 66 MHz |
| Core Size | 32-bit | 32-bit | 32-bit | 32-bit |
Diferenciadores clave
- Flexis-series pin and peripheral compatibility with 8-bit S08AC family (frente a MCF51AC128CCFUE)
- Latest silicon revision is the recommended replacement (frente a MCF51AC128ACFUE (this product))
- Higher Flash and pin count in same family (frente a MCF51AC256BCLKE)
Notas de diseño
The MCF51AC128ACFUE integrates an internal voltage regulator on the VREG pin (pin 43). Place a low-ESR bulk decoupling capacitor (typically 4.7 uF ceramic in parallel with 1 uF) as close to the VREG pin as possible. Without this capacitor the part will fail to start cleanly and may exhibit brown-out behavior under heavy load. Each VDD/VSS pair must have its own 100 nF decoupling capacitor on the same side of the PCB; never share capacitors between pins.
Route the external crystal traces (XTAL/EXTAL, pins 54-55) as short as possible with a guard trace tied to ground on both sides. Keep digital signals away from the crystal traces to prevent injection of switching noise into the oscillator. If using an external clock source, drive EXTAL with a CMOS-compatible clock and leave XTAL floating per datasheet typical application circuit.
Estimated: At a 50 MHz core frequency, switching I/O edges produce ground-bounce noise that can corrupt analog ADC readings. Place a 10 nF + 100 nF stacked decoupling pair adjacent to each VDDA/VSSA pair (pin 44/45), and route all analog input traces away from the PWM output traces. Implement a software median filter on ADC readings to reject residual switching noise.
Do not leave the RESET pin floating - it requires an external pull-up resistor to VDD (typically 10 kohm) plus the decoupling capacitor defined by the manufacturer datasheet typical application circuit. Floating RESET causes erratic behavior including spurious BDM entry. Also: the BKGD/MS pin (pin 59) serves dual purpose as background debug mode entry and mode select; a 4.7 kohm pull-up or pull-down resistor is required for normal operation.
Información de cumplimiento
RoHS compliant per DigiKey product listing. Industrial temperature range -40C to +85C; NOT AEC-Q100 qualified - use NXP S32K or KE families for automotive.