MK51DX256ZCLL10 - Kinetis K51 100MHz Cortex-M4 MCU, 256KB Flash | NXP Semiconductors
MPN： MK51DX256ZCLL10 ✗ 停產MK51DX256ZCLL10 概覽
A measurement MCU (also called a mixed-signal microcontroller) is a semiconductor that combines a processor core with high-precision analog peripherals specifically engineered for sensor signal acquisition, signal conditioning, and human-machine interface drive. Within the embedded hierarchy, MK51DX256ZCLL10 sits in the MCU -> 32-bit microcontroller -> ARM Cortex-M class -> Kinetis K-series taxonomy, optimized for measurement applications rather than pure control. Engineers typically select this category when they need one-chip integration of metrology-grade analog, a display interface, and standard serial connectivity.
Key features of the MK51DX256ZCLL10 include integrated segment LCD controller for glass display drive, USB 2.0 full-speed OTG, multiple low-power modes with run, wait, stop, and VLPR/VLPS, and a 16-bit ADC with PGA supporting both thermistor-style and load-cell sensor inputs. The device also offers up to 70 general-purpose I/O, multiple timers including a programmable delay block and motor-control PWM, and serial interfaces including UART, SPI, and I2C. The 100-pin LQFP package provides ample pin count for mixed-signal designs that need both analog and digital I/O without bus multiplexing.
Architecturally, the K51 leverages the Cortex-M4 Harvard bus configuration with single-cycle multiplier, hardware divide, and tightly coupled memory options. The 256 KB flash is organized in a dual-bank layout supporting field firmware upgrades, while the 64 KB SRAM supports simultaneous program execution and data buffering. The combination of segment LCD and high-precision ADC on the same die is what distinguishes the K51 from other Cortex-M4 Kinetis sub-families (K10, K20, K40) that lack this analog bundle.
Typical applications include single-phase and polyphase smart electricity meters, multi-function industrial meters (water, gas, heat), medical measurement instruments like blood-pressure monitors and glucose meters, HVAC controllers with display, industrial scales and load-cell amplifiers, USB data loggers, and human-machine interfaces with LCD readout. The integrated transimpedance amplifier and op-amps reduce external analog bill of materials in optical and electrochemical sensor designs.
When designing with this MCU, prioritize decoupling capacitor placement near both VDD and VDDA pins, and route analog inputs as short and guarded as possible to preserve 16-bit ADC performance. The segment LCD voltage levels are configured by the chip's charge pump and LCD pin assignments are multiplexed - verify the desired glass pinout against the device's LCD_PIN_MAP register before committing to a PCB layout.
直接替換替代品，適用於 MK51DX256ZCLL10 — 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： MK51DX256ZCLL10 （相同外形與佔位） — 差異在於 Package, ADC, Architecture, DAC, Product Type.
MK51DX256ZCLQ10
✅ 直接替換📋 參考替代品（不在目錄中）
MK50DX256ZCLL10
✅ 直接替換聯絡詢價
查看資料表 →MK53DX256ZCLQ10
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →MK51DX512ZCLL10
✅ 直接替換📋 參考替代品（不在目錄中）
MK51DX256ZCLL10 最大額定值與電氣特性
| Core Architecture | ARM Cortex-M4 with FPU and DSP instructions |
| Maximum CPU Frequency | 100 MHz |
| Program Flash Memory | 256 KB (dual-bank) |
| SRAM | 64 KB |
| Operating Voltage | 1.71 V to 3.6 V |
| 封裝 | 100-pin LQFP (14x14 mm) |
| 安裝類型 | Surface Mount |
| Segment LCD Controller | Integrated |
| USB Interface | USB 2.0 Full-Speed OTG |
| ADC | 2x 16-bit SAR ADC with PGA up to x64 |
| DAC | 1x 12-bit DAC |
| Operational Amplifiers | 2x on-chip op-amps |
| Transimpedance Amplifier | 1x integrated TIA |
| 工作溫度範圍 | -40C to +85C (industrial) |
| GPIO Count | Up to 70 GPIO |
| RoHS 狀態 | Compliant |
MK51DX256ZCLL10 100-pin lqfp (14x14 mm) 腳位配置指南
MK51DX256ZCLL10（100-pin lqfp (14x14 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： MK51DX256ZCLL10.
請參閱 資料表 以查看完整腳位配置。
典型應用
MK51DX256ZCLL10 適用於 6 應用s: Smart Electricity Meter (Single/Multi-Phase), Industrial Multi-Function Meter (Water/Gas/Heat), Blood Pressure Monitor and Glucose Meter, USB Data Logger, HVAC Controller with Display, Industrial Scale / Load-Cell Amplifier.
Smart Electricity Meter (Single/Multi-Phase)
The MK51DX256ZCLL10's two 16-bit SAR ADCs with PGA up to x64 directly digitize shunt-resistor current and resistor-divider voltage signals in single or polyphase meters without external amplifier stages. With 256 KB flash and 64 KB SRAM, this NXP part easily holds DLMS/COSEM protocol stacks plus display fonts, while the integrated segment LCD controller drives the consumption register readout at 3 V. Operating at 100 MHz Cortex-M4 gives the DSP headroom needed for harmonic analysis (up to 16th harmonic) and RMS computation within half-line-cycle windows.
推薦
Industrial Multi-Function Meter (Water/Gas/Heat)
The integrated op-amps and transimpedance amplifier in MK51DX256ZCLL10 simplify ultrasound flow-sensor front-ends for water/heat meters, reducing the analog bill-of-materials by roughly 30% versus discrete designs. The 64 KB SRAM accommodates flow-rate averaging buffers and cumulative volume counters, while 256 KB flash supports application firmware and optional wireless stack fragments for AMR modules. VLPS low-power mode at 4 MHz and sub-microamp standby extend battery life in maintenance-free metering nodes.
推薦
Blood Pressure Monitor and Glucose Meter
Medical measurement instruments benefit from the MK51DX256ZCLL10's 16-bit ADC plus PGA for pressure-transducer signal conditioning and the 12-bit DAC for sensor bias generation. USB OTG enables direct device connectivity for at-home patient monitors that upload measurements to clinical software, while the FPU accelerates real-time cuff-pressure and oscillometric envelope analysis. The segment LCD renders systolic/diastolic/pulse readouts on inexpensive TN-glass displays without a separate LCD driver chip.
推薦
USB Data Logger
USB 2.0 Full-Speed On-The-Go with integrated transceiver lets MK51DX256ZCLL10 appear as a USB mass-storage device when plugged into a PC, requiring only an external pull-up resistor. The 64 KB SRAM doubles as a circular log buffer supporting tens of minutes of high-rate ADC sampling (e.g., 10 kSa/s x 16-bit). 256 KB flash is sufficient for the FAT32 stack plus logger firmware, eliminating an external SPI flash for moderate-duration captures.
推薦
HVAC Controller with Display
Building HVAC controllers use MK51DX256ZCLL10's segment LCD for ambient-temperature/zone-status readouts, two 16-bit ADCs to read multiple thermistor inputs (supply/return air, mixed-air, discharge), and op-amps for active temperature-bridge excitation. The Cortex-M4 DSP instruction set processes PID loops at 1 kHz without CPU saturation, leaving headroom for BACnet/MS-TP or Modbus stack execution. Stable 100 MHz operation across -40C to +85C suits unconditioned equipment-room environments.
推薦
Industrial Scale / Load-Cell Amplifier
The MK51DX256ZCLL10's integrated PGA with up to x64 gain is purpose-built for load-cell signal amplification, replacing external instrumentation amplifiers in weighing scales for the 1-100 kg range. The 16-bit ADC provides 65k counts of usable resolution after noise shaping, supporting legal-for-trade accuracy classes. Segment LCD shows weight-tare-unit readouts, and the USB OTG port serves as a digital interface for billing-system integration in retail point-of-sale scales.
推薦
推薦產品摘要
工程參考資料，適用於 MK51DX256ZCLL10 — 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 | MK51DX256ZCLQ10 | MK50DX256ZCLL10 | MK53DX256ZCLQ10 | MK51DX512ZCLL10 |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 100-LQFP (14x14 mm) | 100-LQFP (14x14 mm) - same | 100-LQFP (14x14 mm) - same | 100-LQFP (14x14 mm) - same | 100-LQFP (14x14 mm) - same |
| Core | ARM Cortex-M4, 100 MHz | ARM Cortex-M4, 100 MHz | ARM Cortex-M4, 100 MHz | ARM Cortex-M4, 100 MHz | ARM Cortex-M4, 100 MHz |
| Program Flash | 256 KB | 256 KB | 256 KB | 256 KB | 512 KB |
| SRAM | 64 KB | 64 KB | 64 KB | 64 KB | 64 KB |
| Segment LCD Controller | Yes | Yes | No | No | Yes |
| USB | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG | USB 2.0 FS OTG |
| 16-bit ADC with PGA | 2x (PGA up to x64) | 2x (PGA up to x64) | 2x (PGA up to x64) | 2x (PGA up to x64) | 2x (PGA up to x64) |
| Temperature Grade | -40C to +85C (industrial) | -40C to +125C (automotive) | -40C to +85C (industrial) | -40C to +125C (automotive) | -40C to +85C (industrial) |
| Lifecycle Status | NRND | NRND | NRND | NRND | NRND |
主要差異化特點
- Integrated segment LCD controller on-chip (對比MK50DX256ZCLL10)
- Higher-grade ADC analog frontend (2 op-amps + TIA) (對比MK53DX256ZCLQ10)
- Pin-compatible 512 KB flash upgrade path (對比MK51DX512ZCLL10)
設計說明
Use a 10 uF bulk plus 100 nF decoupling pair within 5 mm of each VDD/VDDA/VREFH pin group. The K51 ADC's 16-bit resolution is sensitive to VREF ripple; place a separate LDO (or ferrite bead) feeding VDDA/VREFH and avoid routing high-speed digital return currents across the analog ground island. Estimated: a noise density above 50 nV/sqrt(Hz) on VREFH will visibly degrade ADC SNR at low-input levels.
Route analog input traces (ADCx_DP, ADCx_DM for differential; PGA_OUT for sensor input) with a guarded differential pair and avoid crossing them with PWM or system clock signals. The transimpedance amplifier's feedback network (Rf, Cf) should be placed within 3 mm of the TIA_OUT pin to minimize stray capacitance and oscillation risk. Estimated: trace capacitance above 5 pF on TIA inputs can degrade phase margin.
The NXP K51 segment LCD charge-pump requires external capacitors on LCDCAP0/LCDCAP1 pins; missing or wrong-valued capacitors (target 1 uF X7R) result in faint or non-functional display. Do not enable USB OTG VBUS sensing without a 5V-tolerant protection network on the VBUS pin, because direct connection to USB bus voltage exceeds absolute-maximum ratings. Verify pin-mux register assignments before bringing up the segment LCD to avoid conflicting with GPIOs.
At full 100 MHz core clock with all peripherals active, the MK51DX256ZCLL10 in 100-LQFP package typically draws around 35 mA from a 3.3 V supply (Estimated: approx 115 mW). Industrial temperature operation up to +85C ambient is well within the LQFP thermal envelope with adequate copper pour. Avoid mounting the part directly above heat sinks for analog frontend components.
合規資訊
RoHS and REACH compliant per NXP product page. Lead-free and halogen-free per NXP material declaration. Not AEC-Q100 qualified in the standard MK51DX256ZCLL10 variant; choose MK51DX256ZCLQ10 for AEC-Q100 automotive applications.
