MK40DX128VMC7 - Kinetis K40 Cortex-M4 MCU 128KB Flash | NXP
MPN： MK40DX128VMC7 ✓ 啟用中MK40DX128VMC7 概覽
A microcontroller (MCU) is a single-chip computer that integrates a processor core, program and data memory, plus peripheral interfaces. The Cortex-M4 architecture extends Cortex-M3 with single-precision floating-point and DSP instructions, sitting between small Cortex-M0 microcontrollers and higher-end Cortex-M7 parts. Kinetis K40 specifically targets applications that need segment-LCD driving plus USB, integrating the bus controller, segment drivers, charge pump, and PWM-driven backlight control on-die, which removes external LCD controller ICs and shrinks BOM cost.
Key features include ARM Cortex-M4 core with single-precision FPU and DSP extensions, 128KB Flash / 32KB SRAM memory, Full-Speed USB 2.0 On-The-Go controller, and a segment-LCD controller supporting up to 40 segments x 8 backplanes. The device includes a 16-bit SAR ADC, 12-bit DAC, multiple timer/PWM modules, and serial interfaces including CAN, I2C, IrDA, SPI, UART, and USB. Operational range spans 1.71V to 3.6V with industrial temperature grade -40C to +105C.
Architecturally, the MK40DX128VMC7 leverages a low-leakage process with separate voltage rails for the core and I/O, allowing the analog and segment-LCD blocks to remain active while the CPU sleeps. The 72 MHz CPU frequency is paired with multi-layer bus matrix and direct memory access for deterministic peripheral throughput, and the integrated USB controller delivers Full-Speed host/device/OTG functionality without an external PHY.
Typical applications include industrial segment-LCD HMI panels, USB-equipped metering devices, point-of-sale terminals, medical instruments requiring display readouts, and consumer appliances with built-in USB diagnostics. Designers commonly pair the device with NXP segment-LCD glass, external SPI Flash for data logging, and full-speed USB PHY connections.
When designing with this MCU, ensure the 121-ball MAPBGA layout includes proper power-plane decoupling and ground stitching under the BGA, and verify segment-LCD bias generation resistor selection against the LCD glass specifications.
This page synthesizes distributor pricing, drop-in alternatives, package-level comparison data, and practical design guidance that goes beyond what the manufacturer datasheet and distributor product pages typically present, giving you a single reference for sourcing and BOM decisions.
直接替換替代品，適用於 MK40DX128VMC7 — 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： MK40DX128VMC7 （相同外形與佔位） — 差異在於 Package, ADC, Core, Flash Memory, LCD Controller.
MK40DX256VMC7
✅ 直接替換聯絡詢價
查看資料表 →MK40DX128VLH7
✅ 直接替換聯絡詢價
查看資料表 →MK40DX64VMC7
✅ 直接替換聯絡詢價
查看資料表 →MK40DN512ZVMD10
✅ 直接替換聯絡詢價
查看資料表 →MK40DX128VMC7 最大額定值與電氣特性
| Core Processor | ARM Cortex-M4 |
| Core Size | 32-Bit Single-Core |
| Maximum CPU Speed | 72 MHz |
| Program Memory Size | 128 KB (128K x 8) Flash |
| RAM Size | 32 KB |
| 封裝 | 121-MAPBGA (8x8 mm) |
| Number of I/O | 74 |
| Connectivity | CANbus, I2C, IrDA, SPI, UART/USART, USB, USB OTG |
| Peripherals | DMA, I2S, LCD, LVD, POR, PWM, WDT |
| 安裝類型 | Surface Mount |
| RoHS 狀態 | Compliant |
| Sub-Family | Kinetis K40 |
MK40DX128VMC7 121-mapbga (8x8 mm) 腳位配置指南
MK40DX128VMC7（121-mapbga (8x8 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： MK40DX128VMC7.
請參閱 資料表 以查看完整腳位配置。
典型應用
MK40DX128VMC7 適用於 6 應用s: Industrial Segment-LCD HMI Panels, USB-Connected Metering Devices, Point-of-Sale Terminals, Medical Diagnostic Instruments, Consumer Appliances with USB Diagnostics, IoT Sensor Hubs with Local Display.
Industrial Segment-LCD HMI Panels
The MK40DX128VMC7's integrated segment-LCD controller with up to 40 segments per backplane, combined with 128 KB Flash for full color or segment graphics firmware, makes it ideal for industrial HMI panels that display process values, alarms, and menu state on reflective or LED-backlit LCD glass. Designers connect the chip directly to common- and segment-plane traces on the LCD glass without external charge-pump controllers, cutting BOM cost by approximately $1.50 per board compared to discrete LCD-driver solutions.
推薦
USB-Connected Metering Devices
The integrated Full-Speed USB OTG controller allows the MK40DX128VMC7 to serve as the central processor in electricity, gas, and water meters that connect to a host PC or tablet for configuration, log download, or firmware update. The 32 KB SRAM is sufficient to buffer USB CDC communication buffers and metering algorithm state, while the 72 MHz Cortex-M4 core can run metering math plus LCD update concurrently. Replacing a separate USB-to-serial bridge IC with the on-chip OTG controller typically saves $2-$3 of BOM and reduces PCB area.
推薦
Point-of-Sale Terminals
Point-of-sale (POS) terminals combining a segment display, USB barcode scanner, and thermal printer can use the MK40DX128VMC7 as the main controller because of its on-chip USB host, segment-LCD driver, and CANbus interface. The 121-MAPBGA package supports 74 I/O - enough for keypad matrix, printer signals, and two UART peripherals. A typical POS reference design runs the LCD driver and USB stack simultaneously with sub-2 W power consumption from a USB-powered rail.
推薦
Medical Diagnostic Instruments
Medical instruments such as glucose meters, handheld analyzers, and patient bedside displays leverage the MK40DX128VMC7's industrial temperature range, integrated segment-LCD, and USB OTG to drive a numeric display while exporting measurement data to a clinic's computer. The 32 KB SRAM buffer accommodates raw sensor samples before averaging, and the 128 KB Flash hosts both the safety-critical firmware and a small graphical boot loader. The 32-channel DMA controller offloads ADC-to-LCD updates from the CPU, leaving headroom for filter loops.
推薦
Consumer Appliances with USB Diagnostics
White goods and HVAC equipment increasingly include USB diagnostic ports so service technicians can pull fault logs; the MK40DX128VMC7 supports this with its integrated Full-Speed USB device controller while continuing to drive the front-panel segment display. The 72 MHz Cortex-M4 handles both real-time motor control via PWM peripherals and the asynchronous USB stack. The 121-MAPBGA package operates reliably at industrial temperatures common in appliance compartments.
推薦
IoT Sensor Hubs with Local Display
IoT edge nodes that aggregate sensor data and display readings on a local LCD panel benefit from the MK40DX128VMC7's DMA, segment-LCD, and wireless-ready serial interfaces. Combined with an external 2.4 GHz radio front-end, the chip aggregates 8-10 sensor streams, executes a filtering algorithm, and writes the result to a 20-segment LCD every 100 ms. CANbus and I2C peripherals integrate it into industrial-network IoT backbones.
推薦
推薦產品摘要
工程參考資料，適用於 MK40DX128VMC7 — 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 | MK40DX256VMC7 | MK40DX64VMC7 | MK40DN512ZVMD10 |
|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 121-MAPBGA (8x8 mm) | 121-MAPBGA (8x8 mm) - same | 121-MAPBGA (8x8 mm) - same | 144-LQFP (different package) |
| Core | ARM Cortex-M4 32-bit | ARM Cortex-M4 32-bit | ARM Cortex-M4 32-bit | ARM Cortex-M4 32-bit |
| Maximum CPU Speed | 72 MHz | 72 MHz | 72 MHz | 100 MHz |
| Program Memory (Flash) | 128 KB | 256 KB | 64 KB | 512 KB |
| RAM Size | 32 KB | 32 KB | 32 KB | 128 KB |
| Number of I/O | 74 | 74 | 74 | 120 |
| USB | Full-Speed USB OTG | Full-Speed USB OTG | Full-Speed USB OTG | Full-Speed USB OTG |
| Unit Price (qty-1000) | $6.42 | Higher | Lower (-10% to -15%) | Higher |
主要差異化特點
- Double the Flash of K40 base variants in same footprint (對比MK40DX64VMC7)
- Lower cost entry point than K60DN512 with full K40 peripheral set (對比MK60DN256VMD10)
- Integrated segment-LCD vs external LCD driver IC (對比MK20DX128VMC7 (K20 sub-family))
- Higher I/O count in compact 8x8 mm BGA (對比MK10DX128VMC7 (K10 sub-family))
設計說明
The 121-ball MAPBGA (8x8 mm) requires a 4-layer PCB with a continuous ground plane under the BGA footprint to provide a low-impedance return path for USB and segment-LCD switching transients. Use a 0.4 mm pitch BGA escape pattern with microvias-in-pad if the PCB stack-up has 0.2 mm or smaller laser-drilled vias, otherwise use dog-bone fanouts to 0.5 mm via-pad pitch. Stitching vias around the BGA perimeter reduce EMI emissions during USB enumeration by approximately 6 dB.
Power-supply sequencing for the MK40DX128VMC7 follows the K40 family recommendation: VDD must be present before VDDA and VREFH if the part is used with the on-chip ADC, otherwise internal POR may not properly initialize the analog block. Place a 100 nF decoupling capacitor within 2 mm of each VDD pin and a 4.7 uF bulk cap adjacent to the package. For USB applications, the VREG_USB rail requires a 2.2 uF + 100 nF LC network to meet USB 2.0 Full-Speed supply-noise masks.
The segment-LCD controller outputs square waves with slew rates up to 50 V/us, which couple into adjacent analog pins if the LCD traces are routed too close. Estimate: keep at least 0.5 mm between LCD plane outputs and the ADC analog inputs, and add a 10 kohm + 100 nF hardware RC filter on each sensitive ADC line. For long LCD plane traces, add a 330 ohm series resistor near the MCU to dampen reflections on high-impedance glass.
Do not assume the MK40DX128VMC7 can boot directly from USB - firmware must first configure the PLL, GPIO, and USB clocks before USB enumeration can complete. A common boot failure arises when the 32 kHz crystal load capacitance is mistuned, causing the real-time clock (RTC) and USB Start-of-Frame timing to drift. Always characterize crystal oscillator startup on first prototype batches.
合規資訊
RoHS compliant per NXP product page. Not AEC-Q100 qualified; choose MK40DX128VK prefix variant or KEA/K64 family for automotive. Lead-free surface-mount assembly per industry-standard MAPBGA reflow profile.
