NXP Semiconductors MKL33Z128VLH4R

Overview

MKL33Z128VLH4R from NXP Semiconductors (formerly Freescale) is a 48 MHz ARM® Cortex®-M0+ microcontroller with 128 KB flash, 16 KB SRAM, and integrated segment LCD controller supporting up to 28×8 segments. It delivers 54 µA/MHz in very low power run mode and 1.96 µA in VLLS3 deep sleep (RAM + RTC retained), targeting battery-powered metering and portable HMI applications.

For engineers reviewing the MKL33Z128VLH4R datasheet, MKL33Z128VLH4R pinout, MKL33Z128VLH4R application, or MKL33Z128VLH4R equivalent, key selection criteria include its 64-pin LQFP package, 54 GPIOs (including 6 high-drive), 20-channel 16-bit ADC with internal Vref, dual low-power UARTs for always-on communication, and FlexIO for custom serial peripheral emulation in ultra-low-power systems.

Technical Context

The MKL33Z128VLH4R implements an ARM Cortex-M0+ core with Micro Trace Buffer and Bit Manipulation Engine, paired with a configurable MCG-Lite clock system offering factory-trimmed 48 MHz HIRC (±0.5%), 8/2 MHz IRC, and 32 kHz–32 MHz crystal support. Its low-power architecture includes six static power modes-VLLS0 to RUN-with sub-µA retention in VLLS3 and fast wake-up (<104 µs from VLLS3 to RUN).

Peripherals are optimized for cost-sensitive, battery-operated devices: a dedicated segment LCD controller (28×8 or 32×4), two I²C modules (one up to 1 Mbit/s), two SPIs (up to 24 Mbit/s), one I²S interface, and a FlexIO module capable of emulating UART, IrDA, PWM, or custom protocols without CPU intervention-enabling flexible HMI and sensor interface design under strict power budgets.

Key Specifications

Pinout & Package

Package: 64-pin LQFP, 10 mm × 10 mm, 0.5 mm pitch, 1.6 mm thickness - compatible with standard reflow assembly and accessible for manual prototyping.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with MKL27Z128VLH4, the MKL33Z128VLH4R adds essential LCD and FlexIO capabilities for HMI-centric designs; versus MKE15Z128VLH4, it offers superior peripheral configurability and lower deep-sleep current, making it optimal for next-generation battery-powered meters and portable displays.

Availability

MKL33Z128VLH4R is available at Aetrix Electronics and suitable for smart metering, portable medical instrumentation, industrial HMI panels, and asset tracking beacons requiring stable component supply and long-term lifecycle support.

Supply support for MKL33Z128VLH4R 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, IoT, and mobile applications.

The Kinetis KL33 series was designed specifically for cost-sensitive, battery-powered applications requiring integrated segment LCD control and ultra-low-power operation - targeting utility metering, portable diagnostics, and compact human-machine interfaces.

FAQ

What is the maximum operating frequency and core type of the MKL33Z128VLH4R?

The MKL33Z128VLH4R features an ARM Cortex-M0+ core rated for up to 48 MHz operation. This core delivers efficient 32-bit processing with Micro Trace Buffer and Bit Manipulation Engine support, enabling deterministic real-time response in applications such as metering and sensor control. The MKL33Z128VLH4R achieves this frequency using its factory-trimmed 48 MHz HIRC clock source with ±0.5% accuracy, eliminating the need for an external crystal in many use cases.

Does the MKL33Z128VLH4R support segment LCD displays, and what are the configuration limits?

Yes, the MKL33Z128VLH4R integrates a dedicated segment LCD controller supporting up to 28×8 (224 segments) or 32×4 (128 segments) configurations. It includes an internal charge pump to generate required LCD bias voltages, eliminating external components. The MKL33Z128VLH4R supports static, 2-, 3-, and 4-mux drive schemes and operates across the full –40°C to +105°C temperature range, making it suitable for outdoor utility meters and industrial panels.

What low-power modes does the MKL33Z128VLH4R offer, and what is its lowest achievable current draw?

The MKL33Z128VLH4R supports six low-power modes: RUN, WAIT, STOP, VLPS, LLS, and three VLLS variants. Its lowest measured current is 1.96 µA in VLLS3 mode with RAM and RTC retained at 3.0 V and 25°C. In VLLS0, current drops further to 0.18 µA (typ) with PORPO=1, though RTC and RAM are lost. All modes maintain fast wake-up times - under 104 µs from VLLS3 to active RUN - critical for responsive battery-powered systems.

How many GPIOs does the MKL33Z128VLH4R provide, and which support high-drive capability?

The MKL33Z128VLH4R provides 54 general-purpose I/O pins in its 64-pin LQFP package. Of these, 31 support interrupt generation and 6 are designated high-drive pins capable of sourcing or sinking up to 25 mA each - suitable for driving LEDs, relays, or small solenoids directly. All GPIOs support digital filtering, slew rate control, and configurable pull-ups/pull-downs, and are multiplexed with peripherals including UART, I²C, SPI, and FlexIO.

What debugging interface does the MKL33Z128VLH4R use, and is external hardware required?

The MKL33Z128VLH4R uses a two-pin Serial Wire Debug (SWD) interface (SWD_CLK and SWD_DIO) for programming and real-time debugging. No external JTAG adapter is required - standard CMSIS-DAP or SEGGER J-Link probes connect directly. The MKL33Z128VLH4R also includes a Micro Trace Buffer for instruction trace and supports breakpoints, watchpoints, and memory inspection via standard IDEs like MCUXpresso or IAR Embedded Workbench.