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NXP Semiconductors MKL03Z32CBF4R
- Part No.:
- MKL03Z32CBF4R
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 20-XFBGA, WLCSP
- Datasheet:
-
MKL03Z32CBF4R.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 20WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,943
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Product details
Overview
MKL03Z32CBF4R from NXP Semiconductors is an ARM® Cortex-M0+ microcontroller optimized for ultra-low-power edge-node IoT applications. It delivers 48 MHz operation, 32 KB flash, 2 KB SRAM, and 8 KB ROM bootloader in a 20-pin WLCSP (1.61 × 2.0 mm, 0.4 mm pitch), supporting battery-powered sensor nodes requiring sub-μA deep-sleep current and <8 μs wake-up.
For engineers reviewing the MKL03Z32CBF4R datasheet, MKL03Z32CBF4R pinout, MKL03Z32CBF4R application, or MKL03Z32CBF4R equivalent, key selection criteria include its 77 nA deep-sleep mode, integrated 12-bit SAR ADC with 7 channels, LPUART/I²C/SPI interfaces, and support for -40 to 85°C ambient operation in ultra-compact WLCSP packaging.
Technical Context
The MKL03Z32CBF4R implements a single-core ARM Cortex-M0+ CPU with 48 MHz max frequency, backed by a multi-layer bus architecture connecting flash, SRAM, ROM, and peripherals. Its power management unit supports nine low-power modes-including VLLS0 (77 nA), VLLS1 (566 nA), and VLPS (2.2 µA)-with hardware-accelerated wake-up via Low-Leakage Wakeup Unit (LLWU) and configurable clock gating.
Peripherals are tightly integrated: one 12-bit SAR ADC (818 ksps, 7 inputs), one high-speed analog comparator with 6-bit DAC and programmable reference, two 2-channel Timer/PWM modules, RTC, and communication interfaces including LPUART (low-power UART), I²C (up to 1 Mbit/s with double buffer), and SPI-all accessible through 18 GPIOs with configurable pull-ups and drive strength.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | ARM Cortex-M0+, up to 48 MHz - enables real-time control and firmware execution at industry-leading efficiency for resource-constrained edge nodes. |
| Memory | 32 KB flash / 2 KB SRAM / 8 KB ROM bootloader - sufficient for secure boot, sensor fusion algorithms, and OTA update staging in compact firmware images. |
| Low-Power Modes | VLLS0: 77 nA @ 3.0 V; VLPS: 2.2 µA @ 3.0 V with 7.5 µs wake-up - allows multi-year battery life in coin-cell-powered devices like smart tags and wearables. |
| Analog | 12-bit SAR ADC (7 channels, 818 ksps) + comparator with 6-bit DAC - supports precision analog sensing (temperature, voltage, current) without external signal conditioning. |
| I/O & Interfaces | 18 GPIOs; LPUART, I²C (1 Mbit/s), SPI - provides minimal-footprint wired connectivity for BLE/Wi-Fi coexistence or direct sensor interfacing. |
| Operating Range | 1.71–3.6 V supply; -40 to +85°C ambient - compatible with single-cell Li-ion/Li-SOCl₂ and industrial-grade environmental requirements. |
Pinout & Package
Package: 20-pin Wafer-Level Chip Scale Package (WLCSP), 1.61 × 2.0 mm, 0.4 mm pitch, ultra-thin profile (0.32 mm height for BF variant). Designed for space-constrained PCB layouts in wearable and ingestible electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Digital supply input | Primary 1.71–3.6 V power rail; decoupling required per NXP layout guidelines for noise-sensitive mixed-signal operation. |
| VSS | Digital ground | Reference return for digital logic and core; must be connected to system GND with low-inductance path. |
| VDDA | Analog supply input | Separate 1.71–3.6 V rail for ADC/comparator; requires dedicated filtering to maintain 12-bit accuracy. |
| VSSA | Analog ground | Isolated analog reference return; must be star-connected to VSS at single point to minimize digital coupling. |
| PTA0/ADC0_SE0 | GPIO / ADC channel 0 input | Multi-function pin supporting general I/O or analog input; internal 12-bit ADC sampling up to 818 ksps with internal reference. |
| PTA1/ADC0_SE1 | GPIO / ADC channel 1 input | Second analog input channel; shares same ADC module and timing control as PTA0. |
| PTA2/ADC0_SE2 | GPIO / ADC channel 2 input | Third analog input; supports differential or single-ended acquisition depending on configuration register settings. |
| PTA3/ADC0_SE3 | GPIO / ADC channel 3 input | Fourth analog input; usable with internal 1.2 V VREF or external reference for ratiometric measurements. |
| PTA4/ADC0_SE4 | GPIO / ADC channel 4 input | Fifth analog input; supports hardware-triggered conversions synchronized to timer or LPUART events. |
| PTA5/ADC0_SE5 | GPIO / ADC channel 5 input | Sixth analog input; configurable for window compare mode to generate interrupts on threshold crossing. |
| PTA6/ADC0_SE6 | GPIO / ADC channel 6 input | Seventh analog input; supports calibration offset correction via dedicated ADC registers. |
| PTA7/ADC0_SE7 | GPIO / ADC channel 7 input | Eighth analog input; available only when alternate function mapping is enabled in SIM_SCGC5 register. |
| PTB0/LPUART0_RX | GPIO / LPUART receive | Low-power UART RX line; operates in VLPS/VLLS modes with automatic wake-on-start-bit detection. |
| PTB1/LPUART0_TX | GPIO / LPUART transmit | LPUART TX output; supports asynchronous transmission at baud rates up to 115.2 kbps in active and low-power modes. |
| PTB2/I2C0_SCL | GPIO / I²C clock | Open-drain I²C clock line; supports standard/fast-mode (up to 1 Mbit/s) with internal pull-up enable and slew-rate control. |
| PTB3/I2C0_SDA | GPIO / I²C data | Open-drain I²C data line; features double-buffering to reduce CPU overhead during burst transfers. |
| PTB4/SPI0_PCS0 | GPIO / SPI chip select | Active-low SPI peripheral select; supports master/slave operation with configurable polarity and phase. |
| PTB5/SPI0_SCK | GPIO / SPI clock | SPI serial clock output; programmable frequency division from system clock for flexible peripheral timing. |
| PTB6/SPI0_MOSI | GPIO / SPI master-out-slave-in | SPI data output; supports LSB/MSB-first transmission and variable word length (4–16 bits). |
| PTB7/SPI0_MISO | GPIO / SPI master-in-slave-out | SPI data input; includes input glitch filter and configurable sample edge for noise immunity. |
| RESET_b | Active-low reset input | Asynchronous reset pin; internal pull-down when configured as RESET; functions as GPIO with pseudo-open-drain output otherwise. |
| CLKIN | External crystal input | Accepts 32 kHz–40 kHz crystal for RTC or low-power clock source; optional for internal oscillator use. |
| CLKOUT | System clock output | Configurable output of selected clock source (HIRC/LIRC/MCG); useful for debugging or synchronizing external circuitry. |
| VREFH | Analog reference high | Optional external reference input; overrides internal 1.2 V VREF when connected, enabling precise ratiometric measurements. |
| VREFL | Analog reference low | Analog ground reference for external VREF; must be tied to VSSA if internal reference is used. |
| SWD_DIO | Serial Wire Debug I/O | Two-wire debug interface pin; supports programming, breakpointing, and real-time trace via Micro Trace Buffer (MTB). |
| SWD_CLK | Serial Wire Debug clock | Debug clock input; enables non-intrusive debugging without halting real-time operation in low-power modes. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low static power | 77 nA in VLLS0 mode with full RAM retention - extends battery life beyond 10 years in energy-harvesting or coin-cell applications. |
| Fast wake-up capability | 7.5 µs wake time from VLPS to full RUN mode - ensures responsive event-driven operation without latency penalties in sensor polling. |
| Integrated analog subsystem | 12-bit ADC + comparator + 6-bit DAC + 1.2 V VREF - eliminates need for external analog front-end components in basic sensing designs. |
| Boot ROM with flash loader | 8 KB ROM containing factory-programmed bootloader - enables field firmware updates over UART/I²C without external programmer hardware. |
| Secure device identity | 80-bit unique chip ID fused at manufacture - supports cryptographic key binding and device authentication in IoT security frameworks. |
Applications
| Smart Wearable Sensor Node | Industrial Wireless Sensor Tag |
|---|---|
Use Scenario: Miniaturized wrist-worn health monitor measuring temperature, motion, and skin impedance using onboard ADC and GPIO-driven LEDs. IC Role / Device Role / Timing Role: Central MCU executing sensor fusion, BLE packet formatting, and ultra-low-power scheduling with RTC-based periodic wake-up. Use Value: 1.61 × 2.0 mm WLCSP footprint fits within 8 mm² PCB area; 77 nA VLLS0 enables >5-year CR2032 battery life with daily sync. | Use Scenario: Battery-powered vibration/temperature tag mounted on rotating machinery, transmitting alerts via LoRaWAN gateway. IC Role / Device Role / Timing Role: Edge intelligence node performing FFT preprocessing, threshold detection, and LPUART-to-LoRa bridge with wake-on-interrupt. Use Value: 7.5 µs wake-up ensures rapid response to mechanical anomaly events; integrated comparator triggers ADC capture without CPU involvement. |
| Asset Tracking Beacon | Medical Disposable Patch |
Use Scenario: GPS-denied indoor asset tracker using RSSI triangulation from BLE beacons, logging location history to flash. IC Role / Device Role / Timing Role: Primary controller managing BLE scanning, flash wear-leveling, and low-power timer-based state machine. Use Value: 32 KB flash stores 30+ days of timestamped beacon data; VLLS1 (566 nA) enables 3-year shelf life before activation. | Use Scenario: Single-use ECG patch with dry electrodes, streaming raw analog data to smartphone via BLE SoC companion. IC Role / Device Role / Timing Role: Analog front-end conditioner and digital supervisor, providing calibrated ADC readings and battery voltage monitoring. Use Value: Internal 1.2 V VREF and 12-bit ADC achieve ±1.5% full-scale accuracy across 0–45°C; 18 GPIOs support electrode multiplexing and LED status indicators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32L011K4T6 | ARM Cortex-M0+, 16 KB flash, 2 KB SRAM, 32-pin QFN; higher pin count, no integrated VREF or comparator DAC. | Requires external reference for precision ADC; lacks analog comparator with DAC for threshold-triggered capture. | Select when larger PCB area is acceptable and analog integration is handled externally. |
| EFM32ZG108F16 | ARM Cortex-M0+, 16 KB flash, 4 KB RAM, 24-pin QFN; deeper sleep (200 nA), but no ROM bootloader or 12-bit ADC. | No built-in bootloader requires external programming interface; lower-resolution ADC limits sensor fidelity. | Prefer for pure ultra-low-power timing/control where analog sensing is minimal or offloaded. |
Compared with STM32L011K4T6 and EFM32ZG108F16, MKL03Z32CBF4R offers superior analog integration (12-bit ADC + comparator + 6-bit DAC + VREF) and smaller WLCSP packaging, making it optimal for size- and sensing-critical IoT endpoints-though both alternatives provide longer-term supply visibility in certain regions.
Availability
MKL03Z32CBF4R is available at Aetrix Electronics and suitable for battery-powered sensor nodes, medical disposable patches, and industrial wireless tags requiring stable component supply, long-lifecycle support, and guaranteed traceability for ISO 13485 and IEC 62443 compliance.
Supply support for MKL03Z32CBF4R 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 deep expertise in low-power microcontrollers and RF systems.
The Kinetis KL03 family was designed specifically for ultra-small, ultra-low-power edge intelligence-targeting cost-sensitive, space-constrained IoT endpoints where sub-µA sleep current and integrated analog functionality are mandatory.
FAQ
What is the maximum operating temperature range for MKL03Z32CBF4R?
The MKL03Z32CBF4R is rated for -40°C to +85°C ambient temperature, consistent with its WLCSP packaging specification. This range supports deployment in consumer wearables, industrial sensor enclosures, and medical patches where extended thermal tolerance is required without active cooling.
Does MKL03Z32CBF4R include a hardware bootloader?
Yes, MKL03Z32CBF4R includes an 8 KB ROM-based bootloader that supports in-system programming over LPUART or I²C. This eliminates the need for external debug probes during firmware updates and enables field upgrades without physical access to SWD pins.
How many analog input channels does MKL03Z32CBF4R support?
MKL03Z32CBF4R supports seven dedicated analog input channels (ADC0_SE0 through ADC0_SE6) plus an eighth channel (ADC0_SE7) accessible via alternate function mapping. All channels connect to the same 12-bit SAR ADC with configurable sample rates up to 818 ksps.
What is the deepest low-power mode available on MKL03Z32CBF4R?
The deepest low-power mode is Very-Low-Leakage Stop Mode 0 (VLLS0), achieving 77 nA typical current at 3.0 V with full SRAM and register retention. This mode retains context while disabling all clocks except the LLWU, enabling wake-up via GPIO, RTC alarm, or LPUART start bit.
Is MKL03Z32CBF4R pin-compatible with other Kinetis KL03 variants?
No-MKL03Z32CBF4R uses a 20-pin WLCSP (BF package), while KL03 variants like MKL03Z32VFG4R use 16-pin QFN and MKL03Z32VFK4R use 24-pin QFN. Pin counts, pitch, and land patterns differ; PCB redesign is required when substituting between these packages.
MKL03Z32CBF4R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 20-XFBGA, WLCSP
- Series:
- Kinetis KL03
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M0+
- Core Size:
- 32-Bit Single-Core
- Speed:
- 48MHz
- Connectivity:
- I2C, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, LVD, POR, PWM, WDT
- Number of I/O:
- -
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 2K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.71V ~ 3.6V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MKL03Z32CBF4R FAQ
1.How can I place an order for MKL03Z32CBF4R through Aetrix?
Please submit a Request for Quotation (RFQ) for MKL03Z32CBF4R 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 MKL03Z32CBF4R reliable?
The price and inventory of MKL03Z32CBF4R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MKL03Z32CBF4R is usually 5 days.
3.What payment methods are accepted for MKL03Z32CBF4R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MKL03Z32CBF4R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MKL03Z32CBF4R?
MKL03Z32CBF4R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MKL03Z32CBF4R 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 MKL03Z32CBF4R?
For technical support, including MKL03Z32CBF4R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MKL03Z32CBF4R requirements.
6.How does Aetrix verify that MKL03Z32CBF4R is sourced from the original manufacturer or authorized distributors?
All MKL03Z32CBF4R 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 MKL03Z32CBF4R meets industry standards.
7.What is the process for return or replacement of MKL03Z32CBF4R?
All MKL03Z32CBF4R units undergo pre-shipment inspection (PSI). If there is an issue with MKL03Z32CBF4R, 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 MKL03Z32CBF4R part is unused and in its original packaging.
Return procedure for MKL03Z32CBF4R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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