MCF51AC128ACFUE - 32-bit ColdFire V1 MCU 128KB Flash | NXP
N.º da peça: MCF51AC128ACFUE ⚠ Última compra| Qtd. | Preço unitário | 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 Visão geral
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 drop-in para MCF51AC128ACFUE — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com MCF51AC128ACFUE (mesmo formato e footprint) — diferindo em Package, Series, Core Size, Maximum Clock Frequency, Program Memory Size.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
MCF51AC128CCFUE
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MCF52252CAF66
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$6.75 / unidade
Ver ficha técnica →MCF51AC128ACFUE Classificações máximas e características elétricas
| Core | ColdFire V1 (V1 ColdFire RISC) |
| Core Size | 32-bit single-core |
| Frequência máxima de clock | 50 MHz |
| Program Memory Size | 128 KB (128K x 8) Flash |
| Operating Voltage Range | 2.7 V to 5.5 V |
| Encapsulamento | 64-QFP (14x14 mm) |
| Tipo de montagem | Surface Mount |
| ADC | 12-bit (per datasheet) |
| Communication Interfaces | SCI (UART), SPI, I2C |
| Timers | Multiple (per datasheet) |
| Temperatura de operação | -40C to +85C (industrial) |
| Status RoHS | Compliant |
| Series | MCF51AC Flexis |
| Lead Free | Yes |
Configuração de pinos do MCF51AC128ACFUE
| Pino 1 | PTA0/TCLK1 — Port A bit 0 / Timer channel 1 clock input |
| Pino 2 | PTA1/TCLK2 — Port A bit 1 / Timer channel 2 clock input |
| Pino 3 | PTA2 — Port A bit 2 (GPIO) |
| Pino 4 | PTA3 — Port A bit 3 (GPIO) |
| Pino 5 | PTA4 — Port A bit 4 (GPIO) |
| Pino 6 | PTA5 — Port A bit 5 (GPIO) |
| Pino 7 | PTA6 — Port A bit 6 (GPIO) |
| Pino 8 | PTA7 — Port A bit 7 (GPIO) |
| Pino 9 | PTB0 — Port B bit 0 (GPIO) |
| Pino 10 | PTB1 — Port B bit 1 (GPIO) |
| Pino 11 | PTB2 — Port B bit 2 (GPIO) |
| Pino 12 | PTB3 — Port B bit 3 (GPIO) |
| Pino 13 | PTB4 — Port B bit 4 (GPIO) |
| Pino 14 | PTB5 — Port B bit 5 (GPIO) |
| Pino 15 | PTB6 — Port B bit 6 (GPIO) |
| Pino 16 | PTB7 — Port B bit 7 (GPIO) |
| Pino 17 | VDD — Supply voltage (2.7 V to 5.5 V) |
| Pino 18 | VSS — Ground |
| Pino 19 | PTC0 — Port C bit 0 (GPIO) |
| Pino 20 | PTC1 — Port C bit 1 (GPIO) |
| Pino 21 | PTC2 — Port C bit 2 (GPIO) |
| Pino 22 | PTC3 — Port C bit 3 (GPIO) |
| Pino 23 | PTC4 — Port C bit 4 (GPIO) |
| Pino 24 | PTC5 — Port C bit 5 (GPIO) |
| Pino 25 | PTC6 — Port C bit 6 (GPIO) |
| Pino 26 | PTC7 — Port C bit 7 (GPIO) |
| Pino 27 | PTD0 — Port D bit 0 (GPIO) |
| Pino 28 | PTD1 — Port D bit 1 (GPIO) |
| Pino 29 | PTD2 — Port D bit 2 (GPIO) |
| Pino 30 | PTD3 — Port D bit 3 (GPIO) |
| Pino 31 | PTD4 — Port D bit 4 (GPIO) |
| Pino 32 | PTD5 — Port D bit 5 (GPIO) |
| Pino 33 | PTD6 — Port D bit 6 (GPIO) |
| Pino 34 | PTD7 — Port D bit 7 (GPIO) |
| Pino 35 | PTE0/TXD1 — Port E bit 0 / SCI1 transmit |
| Pino 36 | PTE1/RXD1 — Port E bit 1 / SCI1 receive |
| Pino 37 | PTE2 — Port E bit 2 (GPIO) |
| Pino 38 | PTE3 — Port E bit 3 (GPIO) |
| Pino 39 | PTE4 — Port E bit 4 (GPIO) |
| Pino 40 | PTE5 — Port E bit 5 (GPIO) |
| Pino 41 | PTE6 — Port E bit 6 (GPIO) |
| Pino 42 | PTE7 — Port E bit 7 (GPIO) |
| Pino 43 | VREG — Internal voltage regulator output (decoupling cap required) |
| Pino 44 | VDDA — Analog supply voltage |
| Pino 45 | VSSA — Analog ground |
| Pino 46 | ADC0 — ADC channel 0 input |
| Pino 47 | ADC1 — ADC channel 1 input |
| Pino 48 | ADC2 — ADC channel 2 input |
| Pino 49 | ADC3 — ADC channel 3 input |
| Pino 50 | ADC4 — ADC channel 4 input |
| Pino 51 | ADC5 — ADC channel 5 input |
| Pino 52 | ADC6 — ADC channel 6 input |
| Pino 53 | ADC7 — ADC channel 7 input |
| Pino 54 | XTAL — Crystal oscillator input |
| Pino 55 | EXTAL — Crystal oscillator feedback / external clock input |
| Pino 56 | VSS — Ground |
| Pino 57 | VDD — Supply voltage (2.7 V to 5.5 V) |
| Pino 58 | RESET — External reset input (active low) |
| Pino 59 | BKGD/MS — Background Debug Mode / Mode Select |
| Pino 60 | IRQ — External interrupt request input |
| Pino 61 | RSTOUT — Reset output (open-drain) |
| Pino 62 | PWM0 — PWM channel 0 output |
| Pino 63 | PWM1 — PWM channel 1 output |
| Pino 64 | PWM2 — PWM channel 2 output |
Aplicações típicas
MCF51AC128ACFUE é adequado para 6 aplicaçãos: 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
Resumo dos produtos recomendados
Dados de referência de engenharia para MCF51AC128ACFUE — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | 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 |
Principais diferenciais
- Flexis-series pin and peripheral compatibility with 8-bit S08AC family (vs MCF51AC128CCFUE)
- Latest silicon revision is the recommended replacement (vs MCF51AC128ACFUE (this product))
- Higher Flash and pin count in same family (vs MCF51AC256BCLKE)
Notas de projeto
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.
Informações de conformidade
RoHS compliant per DigiKey product listing. Industrial temperature range -40C to +85C; NOT AEC-Q100 qualified - use NXP S32K or KE families for automotive.