NXP Semiconductors MKL33Z32VLH4

Overview

MKL33Z32VLH4 from NXP Semiconductors (formerly Freescale) is a 48 MHz ARM® Cortex®-M0+ microcontroller with 32 KB flash, 4 KB SRAM, and integrated segment LCD driver supporting up to 44×4 segments. It features hardware CRC, FlexIO for serial peripheral emulation, and operates from 1.71–3.6 V across –40 to 105 °C - optimized for battery-powered medical meters and portable industrial HMI displays.

For engineers reviewing the MKL33Z32VLH4 datasheet, MKL33Z32VLH4 pinout, MKL33Z32VLH4 application, or MKL33Z32VLH4 equivalent, key selection criteria include its 64-pin LQFP package, low-power run mode (60 µA/MHz), deep-sleep current (1.83 µA with RTC + RAM retained), and native support for ISO7816 UART in smart card readers.

Technical Context

The MKL33Z32VLH4 implements an ARM Cortex-M0+ core with Micro Trace Buffer and two-pin SWD debug interface. Its clock system integrates a factory-trimmed 48 MHz high-accuracy internal reference (±0.5%), dual internal RC oscillators (8/2 MHz ±3%), and crystal support from 32 kHz to 32 MHz.

Peripherals include one 16-bit 818 ksps ADC with 20-channel input multiplexing, a 12-bit DAC, high-speed analog comparator with embedded 6-bit DAC reference, and three independent Timer/PWM modules - enabling precise timing control for LCD bias generation and sensor signal conditioning.

Key Specifications

Pinout & Package

Package: 64-pin LQFP, 10 mm × 10 mm, 0.5 mm pitch, 1.6 mm height - compatible with standard surface-mount assembly processes and IPC-7351B footprint.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MKL27Z32VLH4, MKL33Z32VLH4 adds integrated LCD driving and higher-accuracy clock references; compared with MKL33Z64VLH4, it offers identical peripheral functionality at reduced flash/SRAM - enabling optimal BOM cost for fixed-feature HMI designs.

Availability

MKL33Z32VLH4 is available at Aetrix Electronics and suitable for portable medical devices, industrial panel meters, and smart card readers requiring stable component supply and long-term lifecycle support.

Supply support for MKL33Z32VLH4 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.

The Kinetis KL33 series was designed specifically for ultra-low-power, cost-sensitive HMI applications - integrating segment LCD drivers, precision analog, and flexible serial interfaces into compact packages for portable instrumentation.

FAQ

What is the maximum operating frequency of the MKL33Z32VLH4?

The MKL33Z32VLH4 features an ARM Cortex-M0+ core rated for up to 48 MHz operation using its high-accuracy internal reference clock (±0.5% tolerance). This frequency is fully supported across the full temperature range (–40 to 105 °C) and supply voltage range (1.71–3.6 V), enabling deterministic real-time performance in portable instrumentation where external crystal stability is not required.

Does the MKL33Z32VLH4 support ISO7816 smart card communication?

Yes, the MKL33Z32VLH4 includes a dedicated UART module compliant with ISO7816-3 specifications, capable of operating at up to 1.5 Mbit/s. The MKL33Z32VLH4 UART supports both asynchronous and synchronous modes, programmable guard times, and automatic answer-to-reset (ATR) generation - making it suitable for contact-based smart card readers without external protocol translators.

How many GPIO pins does the MKL33Z32VLH4 provide in its 64-LQFP package?

The MKL33Z32VLH4 in the 64-pin LQFP package provides 54 general-purpose I/O pins, including 4 high-drive outputs capable of sourcing/sinking up to 18 mA. All GPIOs support interrupt-on-change, configurable pull-ups/pull-downs, and alternate functions including LCD segment/common, UART, I²C, SPI, and PWM - enabling full peripheral mapping without pin conflicts.

What low-power modes are available on the MKL33Z32VLH4?

The MKL33Z32VLH4 supports six static low-power modes: RUN, WAIT, STOP, VLPS, LLS, and VLLS (0–3). In VLLS3 mode, it achieves 1.83 µA current draw while retaining RAM contents and RTC operation - verified at 3.0 V and 25 °C. Wake-up sources include GPIO, RTC alarm, LPTMR, and analog comparator events, enabling responsive yet energy-efficient operation.

Is the MKL33Z32VLH4 pin-compatible with other Kinetis KL33 variants?

Yes, the MKL33Z32VLH4 shares identical pinout and package dimensions (64-LQFP, 10×10 mm, 0.5 mm pitch) with MKL33Z64VLH4 and MKL33Z32VMP4 (64-BGA). This allows direct substitution between 32 KB and 64 KB flash variants without PCB redesign - provided firmware size and SRAM usage remain within the 32 KB/4 KB limits of the MKL33Z32VLH4.