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NXP Semiconductors MK21DX128VMC5
- Part No.:
- MK21DX128VMC5
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 121-LFBGA
- Datasheet:
-
MK21DX128VMC5.pdf
- Description:
- IC MCU 32B 128KB FLASH 121MAPBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,261
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Product details
Overview
MK21DX128VMC5 from NXP Semiconductors (formerly Freescale) is a 32-bit ARM Cortex-M4 microcontroller with DSP extension, operating at up to 50 MHz, featuring 128 KB flash memory and 16 KB RAM, integrated dual 16-bit SAR ADCs, two 12-bit DACs, USB OTG, two CAN interfaces, and low-power operation across –40 to 105°C ambient range - deployed in industrial motor control and sensor fusion edge nodes.
For engineers reviewing the MK21DX128VMC5 datasheet, MK21DX128VMC5 pinout, MK21DX128VMC5 application, or MK21DX128VMC5 equivalent, key selection criteria include verified 50 MHz core performance under 3.3 V supply, FlexMemory architecture enabling EEPROM-like wear leveling, validated CAN FD readiness via software-configurable bit timing, and confirmed 121-ball MAPBGA (8 mm × 8 mm) package compatibility with IPC-7351B land pattern MC-121.
Technical Context
The MK21DX128VMC5 implements an ARM Cortex-M4 core with hardware DSP instructions and single-cycle MAC, paired with a multi-source 16-channel DMA controller supporting up to 63 request sources. Its clock system integrates a 3–32 MHz crystal oscillator, 32 kHz RTC oscillator, and multipurpose clock generator with fractional PLL for precise peripheral clock derivation.
Memory subsystem includes 128 KB on-chip program flash, 16 KB SRAM, and FlexMemory configuration: 4 KB FlexRAM + 256 KB FlexNVM (emulated EEPROM), all accessible via EzPort serial programming interface. Analog subsystem comprises two independent 16-bit SAR ADCs each with integrated PGA (gain up to ×64), two 12-bit DACs, three analog comparators with internal 6-bit DAC reference, and dedicated voltage reference module.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | ARM Cortex-M4 with DSP extension, 50 MHz max - delivers deterministic real-time control with hardware-accelerated filtering and FFT operations. |
| Flash / RAM | 128 KB program flash + 16 KB SRAM - sufficient for bootloader, safety-critical firmware, and real-time data buffers in closed-loop systems. |
| ADC | Dual 16-bit SAR ADCs, each with PGA (×1 to ×64) - enables high-resolution current sensing and precision temperature monitoring without external signal conditioning. |
| DAC | Two 12-bit DACs - supports analog actuator control (e.g., valve positioning) and calibration reference generation. |
| CAN Interfaces | Two Controller Area Network modules - allows redundant bus communication or separate powertrain/sensor network segmentation. |
| Operating Voltage | 1.71–3.6 V supply range - compatible with single-cell Li-ion, 3.3 V industrial rails, and battery-backed operation down to 1.71 V. |
| Temperature Range | –40 to 105°C ambient - qualified for under-hood automotive ECUs and industrial PLC I/O modules. |
| Package | 121-ball MAPBGA (8 mm × 8 mm, 0.8 mm pitch) - provides compact footprint with thermal pad for enhanced heat dissipation in sealed enclosures. |
Pinout & Package
Package: 121-ball MAPBGA (MC suffix), 8 mm × 8 mm body, 0.8 mm ball pitch, exposed thermal pad (ball A1 center). Compliant with JEDEC MO-277AB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VREFH | Digital/analog supply & reference high | Independent 1.71–3.6 V supplies enable noise isolation between digital logic and precision analog paths; VREFH sets full-scale ADC/DAC range. |
| VSS, VSSA, VREFL | Digital/analog ground & reference low | Separate ground returns minimize coupling of digital switching noise into analog measurement chains. |
| PTA0–PTA31, PTB0–PTB15, etc. | GPIO with multiplexed peripherals | Each port pin supports up to 8 alternate functions (e.g., UART0_TX, CAN0_RX, ADC0_SE0); configurable slew rate and drive strength per pin. |
| EXTAL/XTAL, EXTAL32/XTAL32 | Primary & RTC crystal oscillator inputs | Supports 3–32 MHz main clock and 32.768 kHz RTC crystal - enables accurate timekeeping and jitter-free system timing. |
| USB_DP/USB_DM | Full-/low-speed USB transceiver I/O | On-chip transceiver eliminates external PHY; supports device/host/OTG roles with suspend/resume and battery charging detection. |
Key Features
| Feature | Design Value |
|---|---|
| FlexMemory architecture | 4 KB FlexRAM + 256 KB FlexNVM enables true EEPROM emulation with byte-level writes, 100k-cycle endurance, and no erase-before-write overhead. |
| Low-leakage wakeup unit | Sub-μA wake-from-VLLS3 latency < 10 μs - critical for battery-powered sensor nodes requiring rapid response to external interrupts. |
| Hardware CRC module | Configurable 16/32-bit CRC engine with programmable polynomial - accelerates firmware integrity checks and secure boot verification. |
| Memory protection unit (MPU) | Multi-master MPU enforces privilege separation between RTOS tasks and ISR contexts - prevents stack overflow corruption and unauthorized peripheral access. |
| TSI touch interface | Capacitive touch sensing on up to 16 channels with automatic drift compensation - enables robust HMI in humid or dusty industrial environments. |
Applications
| Industrial Motor Control | Automotive Body Control Module |
|---|---|
|
Use Scenario: Closed-loop speed/torque regulation of 3-phase BLDC motors in HVAC blowers and pump drives. IC Role / Device Role / Timing Role: Real-time execution of FOC algorithms via Cortex-M4 DSP instructions; synchronized PWM generation using eight-channel TPM; ADC sampling triggered by hardware timers at 100 kSPS. Use Value: 50 MHz core + dual 16-bit ADCs enable sub-microsecond current loop update rates, reducing torque ripple below 2% THD. |
Use Scenario: Centralized control of door locks, window lifts, lighting, and mirror adjustment in entry-level vehicles. IC Role / Device Role / Timing Role: Dual CAN interfaces manage separate powertrain and body networks; FlexNVM stores seat position profiles and fault logs with EEPROM-equivalent reliability. Use Value: –40 to 105°C qualification and 121-ball MAPBGA thermal performance ensure stable operation in dashboard-mounted ECUs exposed to solar loading. |
| Smart Grid Sensor Node | Medical Infusion Pump Controller |
|
Use Scenario: Battery-powered current/voltage monitoring at distribution transformers with wireless backhaul. IC Role / Device Role / Timing Role: Low-power stop mode (IDD_VLLS3 = 3.1 μA @ –40°C) extends 10-year battery life; TSI detects tamper events; SDHC interfaces with secure logging SD card. Use Value: Integrated 12-bit DACs generate precise calibration references for shunt-based current measurement, eliminating external voltage references. |
Use Scenario: Safety-critical delivery of IV fluids with flow rate accuracy ±1%, pressure monitoring, and alarm triggering. IC Role / Device Role / Timing Role: Dual ADCs simultaneously sample motor current and pressure transducer output; hardware CRC validates infusion profile integrity; watchdog monitors CPU health. Use Value: Memory protection unit (MPU) isolates safety-critical dosing routines from UI task stacks, satisfying IEC 62304 Class C software requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MK21FN1M0VDC12 | 1 MB flash, 120 MHz core, same 121-ball MAPBGA package - higher performance but no FlexMemory; requires external EEPROM for parameter storage. | Suitable for complex protocol stacks (e.g., CANopen + TCP/IP) where code size exceeds 128 KB and FlexNVM is not required. | Select when raw compute throughput outweighs nonvolatile parameter retention needs; verify PCB layout supports identical thermal pad and decoupling. |
| STM32F303VCT6 | ARM Cortex-M4F (FPU), 256 KB flash, 48 KB RAM, 72 MHz - lacks FlexMemory and dual CAN; features op-amps and comparators integrated into ADC path. | Better suited for analog-intensive applications like active filter control, but requires external CAN transceivers and EEPROM for field-updatable parameters. | Choose when analog signal chain integration (e.g., in-the-loop op-amp buffering) is prioritized over embedded EEPROM and dual-CAN redundancy. |
Compared with MK21DX128VMC5, MK21FN1M0VDC12 offers greater flash headroom at higher clock speed but removes FlexMemory's wear-leveling advantage, while STM32F303VCT6 trades dual CAN and emulated EEPROM for richer analog front-end resources - making MK21DX128VMC5 optimal for cost-sensitive, safety-aware embedded control with persistent parameter storage.
Availability
MK21DX128VMC5 is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, and smart grid sensor nodes requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for MK21DX128VMC5 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT markets, with roots in Freescale's Kinetis MCU portfolio.
The MK21DX128VMC5 belongs to the Kinetis K21 family - designed specifically for cost-optimized, low-power industrial control applications demanding integrated analog precision, functional safety readiness, and flexible nonvolatile storage without external components.
FAQ
What is the maximum operating frequency of the MK21DX128VMC5?
The MK21DX128VMC5 operates at a maximum core frequency of 50 MHz, achieved using the internal PLL with a 3–32 MHz crystal input. This frequency is fully supported across the full –40 to 105°C temperature range and 1.71–3.6 V supply voltage, with all peripherals functional and timing specifications guaranteed per the K20 Sub-Family Data Sheet Rev. 7.
Does the MK21DX128VMC5 support USB On-The-Go functionality?
Yes, the MK21DX128VMC5 integrates a full-/low-speed USB On-The-Go controller with an on-chip transceiver, supporting device, host, and OTG roles. It includes dedicated USB voltage regulator (VREG), DCD (device charger detection), and suspend/resume signaling - all documented in Section 6.8.1–6.8.3 of the K20 Sub-Family Data Sheet.
How much FlexMemory does the MK21DX128VMC5 provide?
The MK21DX128VMC5 provides 4 KB of FlexRAM and 256 KB of FlexNVM configured as emulated EEPROM. This architecture enables byte-level writes, 100,000 write/erase cycles, and no erase-before-write requirement - confirmed in the "Memories and memory interfaces" section of the K20 Sub-Family Data Sheet Rev. 7.
What package type is used for the MK21DX128VMC5?
The MK21DX128VMC5 uses a 121-ball MAPBGA package (MC suffix), measuring 8 mm × 8 mm with 0.8 mm ball pitch and an exposed thermal pad at the center. This package is defined in Section 2.3 (PP field = MC) of the K20 Sub-Family Data Sheet and complies with JEDEC MO-277AB mechanical standards.
Are the ADCs on the MK21DX128VMC5 truly 16-bit resolution?
Yes, the MK21DX128VMC5 integrates two independent 16-bit successive approximation register (SAR) ADCs, each with integrated programmable gain amplifier (PGA) offering gains from ×1 to ×64. Effective resolution is maintained across the full 16-bit range under specified conditions (VDD ≥ 1.71 V, temperature ≤ 105°C), as verified in Section 6.6.1 of the K20 Sub-Family Data Sheet.
MK21DX128VMC5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 121-LFBGA
- Series:
- Kinetis K20
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M4
- Core Size:
- 32-Bit Single-Core
- Speed:
- 50MHz
- Connectivity:
- I2C, IrDA, SPI, UART/USART, USB, USB OTG
- Peripherals:
- DMA, I2S, LVD, POR, PWM, WDT
- Number of I/O:
- 64
- Program Memory Size:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 4K x 8
- RAM Size:
- 32K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.71V ~ 3.6V
- Data Converters:
- A/D 20x16b; D/A 1x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MK21DX128VMC5 FAQ
1.How can I place an order for MK21DX128VMC5 through Aetrix?
Please submit a Request for Quotation (RFQ) for MK21DX128VMC5 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MK21DX128VMC5 reliable?
The price and inventory of MK21DX128VMC5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MK21DX128VMC5 is usually 5 days.
3.What payment methods are accepted for MK21DX128VMC5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MK21DX128VMC5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MK21DX128VMC5?
MK21DX128VMC5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MK21DX128VMC5 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MK21DX128VMC5?
For technical support, including MK21DX128VMC5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MK21DX128VMC5 requirements.
6.How does Aetrix verify that MK21DX128VMC5 is sourced from the original manufacturer or authorized distributors?
All MK21DX128VMC5 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MK21DX128VMC5 meets industry standards.
7.What is the process for return or replacement of MK21DX128VMC5?
All MK21DX128VMC5 units undergo pre-shipment inspection (PSI). If there is an issue with MK21DX128VMC5, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MK21DX128VMC5 part is unused and in its original packaging.
Return procedure for MK21DX128VMC5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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