MCF51AC128ACFUE - 32-bit ColdFire V1 MCU 128KB Flash | NXP
MPN: MCF51AC128ACFUE ⚠ Lần mua cuốiMCF51AC128ACFUE Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho MCF51AC128ACFUE — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với MCF51AC128ACFUE (cùng hình factor và footprint) — khác nhau ở Package, Series, Core Size, Maximum Clock Frequency, Program Memory Size.
MCF51AC128CCFUE
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MCF52252CAF66
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →MCF51AC128ACFUE Tỷ lệ tối đa & tính chất điện
| Core | ColdFire V1 (V1 ColdFire RISC) |
| Core Size | 32-bit single-core |
| Tần số xung maksimum | 50 MHz |
| Program Memory Size | 128 KB (128K x 8) Flash |
| Operating Voltage Range | 2.7 V to 5.5 V |
| Hộp | 64-QFP (14x14 mm) |
| Kiểu lắp đặt | Surface Mount |
| ADC | 12-bit (per datasheet) |
| Communication Interfaces | SCI (UART), SPI, I2C |
| Timers | Multiple (per datasheet) |
| Nhiệt độ hoạt động | -40C to +85C (industrial) |
| Trạng thái RoHS | Compliant |
| Series | MCF51AC Flexis |
| Lead Free | Yes |
Cấu hình chân MCF51AC128ACFUE
| Chân 1 | PTA0/TCLK1 — Port A bit 0 / Timer channel 1 clock input |
| Chân 2 | PTA1/TCLK2 — Port A bit 1 / Timer channel 2 clock input |
| Chân 3 | PTA2 — Port A bit 2 (GPIO) |
| Chân 4 | PTA3 — Port A bit 3 (GPIO) |
| Chân 5 | PTA4 — Port A bit 4 (GPIO) |
| Chân 6 | PTA5 — Port A bit 5 (GPIO) |
| Chân 7 | PTA6 — Port A bit 6 (GPIO) |
| Chân 8 | PTA7 — Port A bit 7 (GPIO) |
| Chân 9 | PTB0 — Port B bit 0 (GPIO) |
| Chân 10 | PTB1 — Port B bit 1 (GPIO) |
| Chân 11 | PTB2 — Port B bit 2 (GPIO) |
| Chân 12 | PTB3 — Port B bit 3 (GPIO) |
| Chân 13 | PTB4 — Port B bit 4 (GPIO) |
| Chân 14 | PTB5 — Port B bit 5 (GPIO) |
| Chân 15 | PTB6 — Port B bit 6 (GPIO) |
| Chân 16 | PTB7 — Port B bit 7 (GPIO) |
| Chân 17 | VDD — Supply voltage (2.7 V to 5.5 V) |
| Chân 18 | VSS — Ground |
| Chân 19 | PTC0 — Port C bit 0 (GPIO) |
| Chân 20 | PTC1 — Port C bit 1 (GPIO) |
| Chân 21 | PTC2 — Port C bit 2 (GPIO) |
| Chân 22 | PTC3 — Port C bit 3 (GPIO) |
| Chân 23 | PTC4 — Port C bit 4 (GPIO) |
| Chân 24 | PTC5 — Port C bit 5 (GPIO) |
| Chân 25 | PTC6 — Port C bit 6 (GPIO) |
| Chân 26 | PTC7 — Port C bit 7 (GPIO) |
| Chân 27 | PTD0 — Port D bit 0 (GPIO) |
| Chân 28 | PTD1 — Port D bit 1 (GPIO) |
| Chân 29 | PTD2 — Port D bit 2 (GPIO) |
| Chân 30 | PTD3 — Port D bit 3 (GPIO) |
| Chân 31 | PTD4 — Port D bit 4 (GPIO) |
| Chân 32 | PTD5 — Port D bit 5 (GPIO) |
| Chân 33 | PTD6 — Port D bit 6 (GPIO) |
| Chân 34 | PTD7 — Port D bit 7 (GPIO) |
| Chân 35 | PTE0/TXD1 — Port E bit 0 / SCI1 transmit |
| Chân 36 | PTE1/RXD1 — Port E bit 1 / SCI1 receive |
| Chân 37 | PTE2 — Port E bit 2 (GPIO) |
| Chân 38 | PTE3 — Port E bit 3 (GPIO) |
| Chân 39 | PTE4 — Port E bit 4 (GPIO) |
| Chân 40 | PTE5 — Port E bit 5 (GPIO) |
| Chân 41 | PTE6 — Port E bit 6 (GPIO) |
| Chân 42 | PTE7 — Port E bit 7 (GPIO) |
| Chân 43 | VREG — Internal voltage regulator output (decoupling cap required) |
| Chân 44 | VDDA — Analog supply voltage |
| Chân 45 | VSSA — Analog ground |
| Chân 46 | ADC0 — ADC channel 0 input |
| Chân 47 | ADC1 — ADC channel 1 input |
| Chân 48 | ADC2 — ADC channel 2 input |
| Chân 49 | ADC3 — ADC channel 3 input |
| Chân 50 | ADC4 — ADC channel 4 input |
| Chân 51 | ADC5 — ADC channel 5 input |
| Chân 52 | ADC6 — ADC channel 6 input |
| Chân 53 | ADC7 — ADC channel 7 input |
| Chân 54 | XTAL — Crystal oscillator input |
| Chân 55 | EXTAL — Crystal oscillator feedback / external clock input |
| Chân 56 | VSS — Ground |
| Chân 57 | VDD — Supply voltage (2.7 V to 5.5 V) |
| Chân 58 | RESET — External reset input (active low) |
| Chân 59 | BKGD/MS — Background Debug Mode / Mode Select |
| Chân 60 | IRQ — External interrupt request input |
| Chân 61 | RSTOUT — Reset output (open-drain) |
| Chân 62 | PWM0 — PWM channel 0 output |
| Chân 63 | PWM1 — PWM channel 1 output |
| Chân 64 | PWM2 — PWM channel 2 output |
Ứng dụng tiêu biểu
MCF51AC128ACFUE phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MCF51AC128ACFUE — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- Flexis-series pin and peripheral compatibility with 8-bit S08AC family (vsMCF51AC128CCFUE)
- Latest silicon revision is the recommended replacement (vsMCF51AC128ACFUE (this product))
- Higher Flash and pin count in same family (vsMCF51AC256BCLKE)
Ghi chú thiết kế
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.
Thông tin tuân thủ
RoHS compliant per DigiKey product listing. Industrial temperature range -40C to +85C; NOT AEC-Q100 qualified - use NXP S32K or KE families for automotive.