MC56F8256MLF - 16-bit DSC 60MHz 64KB Flash | NXP
MPN： MC56F8256MLF ✗ 停產MC56F8256MLF 概覽
A digital signal controller combines the numeric processing power of a digital signal processor (DSP) with the peripheral set and control flow of a microcontroller (MCU) on a single die. In the power-management hierarchy of embedded systems, DSCs such as the 56F8xxx family sit between general-purpose MCUs and dedicated DSPs, making them a preferred choice where control loops and fast math must coexist in one chip.
Key features of the MC56F8256 include the hybrid 56800E architecture with dual Harvard-style buses for parallel instruction and data fetches, an internal oscillator that removes the need for an external crystal in many designs, and 39 general-purpose I/O lines for driving gate drivers, relays, and communication interfaces. The single-supply 3.3V operation simplifies power-tree design in industrial systems.
Technically, the 56800E core executes a CISC-friendly instruction set with DSP addressing modes, enabling tight current-loop and control algorithms such as field-oriented control without an external math co-processor. Per the NXP product page, the MC56F825x/MC56F824x family targets power conversion and motor control as its primary markets.
Typical applications include switched-mode power supplies, AC induction motor (ACIM), brushless DC (BLDC), PMSM, switched-reluctance and stepper motor control, battery chargers and management, solar inverters, industrial control, and home appliance systems.
Design consideration: the part is End of Life per NXP, so new designs should evaluate lifetime supply or the replacement path noted in the NXP discontinuance documentation before committing to a layout.
This page synthesizes distributor pricing, drop-in family alternatives, and lifecycle analysis not found in the manufacturer datasheet alone.
直接替換替代品，適用於 MC56F8256MLF — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： MC56F8256MLF （相同外形與佔位） — 差異在於 Lifecycle Status, Core, Core Architecture, Number of I/O, Package.
MC56F8256VLF
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →MC56F8255MLD
✅ 直接替換聯絡詢價
查看資料表 →MC56F8246VLF
✅ 直接替換📋 參考替代品（不在目錄中）
MC56F8257MLF
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MC56F8236VLF
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MC56F8256MLF 最大額定值與電氣特性
| Core | 56800E |
| Core Architecture | 16-bit DSC (DSP + MCU hybrid) |
| Core Architecture Classification | CISC-style instruction set (per FindIC listing) |
| 最大時脈頻率 | 60 MHz |
| Program Memory Size | 64KB (32K x 16) |
| Program Memory Type | FLASH |
| RAM Size | 4K x 16 |
| 供應電壓 | 3.3 V |
| Number of I/O | 39 |
| Oscillator Type | Internal |
| 封裝 / 外殼 | 48-LQFP (7x7 mm) |
| 安裝類型 | Surface Mount |
| Packaging | Tube |
| Family Series | NXP 56F8xxx / MC56F825x |
| Typical Applications | SMPS, motor control (ACIM, BLDC, PMSM, SR, stepper), battery chargers, solar inverters |
| 生命週期狀態 | End of Life (per NXP product page) |
MC56F8256MLF 48-lqfp (7x7 mm) 腳位配置指南
MC56F8256MLF（48-lqfp (7x7 mm) 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： MC56F8256MLF.
請參閱 資料表 以查看完整腳位配置。
典型應用
MC56F8256MLF 適用於 6 應用s: Switched-Mode Power Supplies (SMPS), BLDC / PMSM Motor Control, AC Induction and Stepper Motor Drives, Battery Chargers and Battery Management, Solar Inverters, Industrial Control and Home Appliances.
Switched-Mode Power Supplies (SMPS)
The MC56F8256MLF is explicitly listed for switched-mode power supply and power management applications in the NXP family description. Its 56800E core at 60 MHz executes digital compensator and peak-current-mode algorithms with DSP-grade multiply-accumulate throughput, enabling tight voltage regulation and fast transient response in LLC, flyback, and buck topologies. With 64KB of FLASH, engineers can implement soft-start, burst mode, fault protection, and PMBus-style telemetry in a single chip, while 39 GPIO lines drive PWM outputs, relays, and status signaling. The internal oscillator trims BOM cost in cost-sensitive PSU boards, and single-supply 3.3V operation eases integration with existing logic rails. Digital control also allows firmware-tuned loop characteristics without hardware redesign - a major advantage over analog controllers during certification and ECO cycles.
推薦
BLDC / PMSM Motor Control
Brushless DC and permanent-magnet synchronous motor control is a headline application for the MC56F8256MLF. The 56800E core's DSP addressing modes and hardware multiply support field-oriented control (FOC) with Clarke/Park transforms running inside sub-100us current loops, while 64KB FLASH holds sensorless observers, startup ramps, and commutation tables. The 39 I/O lines connect directly to gate-driver PWM inputs, hall sensors, or encoder interfaces, and the internal oscillator keeps the bill of materials lean. Compared with a generic MCU at the same 60 MHz clock, the DSC executes the per-sample math in fewer cycles, leaving headroom for protection diagnostics and communication. For appliance, HVAC blower, and industrial pump drives, this part delivers deterministic control performance in a compact 48-LQFP footprint at 3.3V.
推薦
AC Induction and Stepper Motor Drives
Beyond BLDC/PMSM, the NXP family description names ACIM (AC induction), switched-reluctance, and stepper motor control as supported applications for the MC56F825x family. Induction motor V/f and slip-compensation schemes, plus microstepping algorithms for stepper drives, rely on repetitive trigonometric and multiply-accumulate operations that the 56800E core executes efficiently at 60 MHz. The 64KB program FLASH accommodates ramp generators, current limiting, and stall detection, while the RAM block buffers fast current samples for closed-loop microstepping. Integrated PWM peripherals generate complementary outputs with dead time for inverter bridges. In washing machines, industrial fans, laboratory automation, and conveyor systems, the MC56F8256MLF provides a single-chip drive controller that reduces board area and simplifies EMC filter design relative to discrete analog control.
推薦
Battery Chargers and Battery Management
Battery chargers and battery management systems are explicitly listed targets for the MC56F8256MLF. Charging profiles - CC/CV for lead-acid and lithium chemistries, termination detection, temperature-qualified current derating, and safety fault handling - map naturally onto the DSC's ADC sampling and DSP math. The 60 MHz core runs coulomb counting and impedance estimation in real time, and the 64KB FLASH stores chemistry-specific profiles that firmware can update in the field. Multiple GPIO and PWM channels drive multi-stage charge FETs and balance circuits, while the 3.3V single supply simplifies design in portable and light-industrial equipment. Because the controller is fully digital, manufacturers can retune charging curves via firmware for new cell types, protecting the hardware investment across product generations and certification retests.
推薦
Solar Inverters
Solar inverters are named as a primary application for the MC56F825x family. The part handles the dual computational burden of maximum power point tracking (MPPT) on the DC side and grid-synchronization (phase-locked loop) plus current shaping on the AC side. At 60 MHz, the 56800E core sustains both the outer MPPT loop and fast inner current loops in a single scheduler, with DSP arithmetic ensuring deterministic latency. 64KB FLASH stores anti-islanding logic, grid codes, and fault logging; 39 I/O drive multi-channel PWM for the H-bridge and auxiliary relays. Single-chip integration of control and supervision reduces board complexity in string and micro-inverter designs. Note the End-of-Life status: this device suits sustaining existing inverter production with secured stock, while new platforms should target NXP's current DSC families.
推薦
Industrial Control and Home Appliances
The NXP family description lists industrial control and home appliances as core markets for the MC56F8256MLF. In industrial equipment it sequences actuators, parses sensor inputs, and runs PID loops for process control, using 39 GPIO for relay drivers, limit switches, and indicator logic. In appliances - dishwashers, refrigerators, cooktops, and ventilation - it combines motor drive, user-interface scanning, and safety interlocks on one die, cutting component count where analog front ends previously required multiple ICs. The internal oscillator passes timing-tolerant appliance requirements without a crystal, and 3.3V logic interfaces cleanly with modern peripherals. The DSC's DSP capability additionally supports acoustic noise-cancellation of motor harmonics and predictive maintenance counters, features a plain MCU would struggle to deliver within the same power and cost envelope.
推薦
推薦產品摘要
工程參考資料，適用於 MC56F8256MLF — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | MC56F8256VLF | MC56F8255MLD | MC56F8246VLF | MC56F8257MLF |
|---|---|---|---|---|---|
| Package | 48-LQFP (7x7 mm) | 48-LQFP (7x7 mm) - same | 48-LQFP - same footprint | 48-LQFP - same footprint | 48-LQFP (7x7 mm) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core | 56800E 16-bit DSC | 56800E 16-bit DSC | 56800E 16-bit DSC | 56800E 16-bit DSC | 56800E 16-bit DSC |
| Max Clock Frequency | 60 MHz | 60 MHz | 60 MHz | 60 MHz | 60 MHz |
| Supply Voltage | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
主要差異化特點
- Largest commonly used FLASH in its 48-LQFP sub-family tier (對比MC56F8246VLF)
- Pin-compatible upgrade headroom (對比MC56F8257MLF)
- Trade-off: End of Life status (對比MC56F8255MLD)
設計說明
The MC56F8256MLF is End of Life per the NXP product page, which also hosts the discontinuance and replacement Product Change Notice. Before starting or sustaining any production build, download this notice from NXP to identify the officially recommended successor and the last-time-buy deadline. Failing to plan the last-time-buy is the single biggest risk with this MPN: authorized stock is already finite and broker pricing will inflate once franchised channels empty. Budget a bridge quantity covering your production horizon plus attrition, and validate the replacement on your existing board before the stock runs out.
The device operates from a single 3.3V supply with an internal oscillator, so most boards need only bulk decoupling (typically a 10uF ceramic plus 0.1uF caps on each supply pin pair) and a stable LDO or buck output. If the board also powers gate drivers or motor supplies from a different rail, sequence or isolate them per the MC56F825x datasheet power-up requirements to avoid latch-up on shared I/O. Estimated: at 60 MHz with typical DSC core current on the order of tens of milliamperes, core power dissipation stays well under 0.5W, so the 48-LQFP needs no heatsink; exact figures require the datasheet electrical characteristics tables.
In digital power and motor-control layouts, keep the PWM output traces from the 48-LQFP to gate drivers short and away from ADC sense lines feeding the current-shunt amplifiers; the DSP's fast control loops are only as good as the signal integrity of their feedback paths. Place a ground plane under the controller and route the oscillator (if an external clock option is used) away from switching nodes. Group the 39 GPIO assignments during schematic capture so motor-phase, communication, and protection signals land on adjacent pins - this simplifies both layout and EMC filtering of the inverter bridge section.
合規資訊
The NXP product page hosts an Environmental Quality section for MC56F8256MLF, but the search snippets retrieved do not state RoHS/REACH status. Partstack lists Temperature Grade: AUTOMOTIVE parametrically. Verify exact compliance on the NXP environmental page or datasheet before export/documentation.