NXP Semiconductors MKL46Z256VLH4

Overview

MKL46Z256VLH4 from NXP Semiconductors (formerly Freescale) is a 48 MHz ARM Cortex-M0+ microcontroller in 64-pin LQFP package, featuring 256 KB flash, 32 KB SRAM, USB 2.0 On-The-Go with on-chip transceiver, segment LCD controller (up to 47×8), and ultra-low-power operation down to 0.23 µA in VLLS0 mode. It targets battery-powered HMI, portable medical devices, and smart sensor nodes requiring robust mixed-signal integration and fast wake-up (4.5 µs from VLPS).

For engineers reviewing the MKL46Z256VLH4 datasheet, MKL46Z256VLH4 pinout, MKL46Z256VLH4 application, or MKL46Z256VLH4 equivalent, key selection criteria include its 64-pin LQFP footprint, 1.71–3.6 V supply range, -40 to 105°C industrial temperature grade, integrated 16-bit SAR ADC and 12-bit DAC, and support for nine low-power modes including VLLS0/VLLS1 with full state retention.

Technical Context

The MKL46Z256VLH4 implements a single-core ARM Cortex-M0+ processor with Thumb-2 instruction set, executing from zero-wait-state flash memory. Its clock system integrates the Multipurpose Clock Generator (MCG) supporting FEI, FBE, PEE, and BLPI modes, enabling dynamic switching between high-performance (48 MHz) and ultra-low-power (4 MHz) operation.

System-level peripherals include a 4-channel DMA controller, Bit Manipulation Engine (BME), SWD debug interface with Micro Trace Buffer, and Low-Leakage Wakeup Unit (LLWU). Analog subsystem comprises a 16-bit SAR ADC with hardware averaging, 12-bit DAC, analog comparator with embedded 6-bit DAC reference, and TSI-based capacitive touch sensing - all operable in low-power states.

Key Specifications

Pinout & Package

64-pin LQFP (10 mm × 10 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level 3 (MSL3).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MKL46Z256VLH4, MKL26Z128VLH4 offers identical footprint and feature parity at lower memory capacity, while MKE02Z64VLD4 trades USB/LCD capability for smaller size and lower cost - making MKL46Z256VLH4 the optimal choice for display-integrated, USB-configurable industrial edge nodes.

Availability

MKL46Z256VLH4 is available at Aetrix Electronics and suitable for smart metering displays, portable medical monitors, industrial control panels, asset tracking beacons, and battery-powered HMI systems requiring stable component supply across long production lifecycles.

Supply support for MKL46Z256VLH4 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, with deep expertise in ARM-based microcontrollers and mixed-signal integration.

The Kinetis KL46 sub-family - including MKL46Z256VLH4 - was designed specifically for ultra-low-power, cost-sensitive embedded applications requiring integrated USB, LCD, and precision analog peripherals in compact packages.

FAQ

What is the maximum operating frequency of the MKL46Z256VLH4 core?

The MKL46Z256VLH4 features an ARM Cortex-M0+ core rated for up to 48 MHz operation in normal run mode. This frequency is achievable using the Multipurpose Clock Generator (MCG) in PEE mode with an external crystal or internal reference, and requires proper voltage (≥2.7 V) and temperature conditions per the datasheet's AC electrical characteristics table.

Does the MKL46Z256VLH4 support USB device enumeration without external components?

Yes, the MKL46Z256VLH4 integrates a full-speed USB 2.0 transceiver with on-chip termination resistors and a 5 V-to-3.3 V regulator (VREGIN input), enabling direct connection to a USB host without external PHY, level shifters, or voltage translators - simplifying board design and reducing BOM cost.

What is the lowest power consumption mode supported by the MKL46Z256VLH4, and what state is retained?

The MKL46Z256VLH4 supports Very-Low-Leakage Stop Mode 0 (VLLS0) with typical current draw of 0.23 µA at 3.0 V and 25°C. In this mode, the entire register file, SRAM, and peripheral configurations are retained, allowing sub-microsecond wake-up to active execution while preserving full system context.

Can the MKL46Z256VLH4 drive a segment LCD without external bias circuitry?

Yes, the MKL46Z256VLH4 includes a dedicated segment LCD controller capable of driving up to 47 frontplanes and 8 backplanes (376 segments) with internal resistor ladder bias network and software-configurable voltage regulation - eliminating need for external LCD bias generators or charge pumps in most implementations.

What analog-to-digital conversion resolution and speed does the MKL46Z256VLH4 provide?

The MKL46Z256VLH4 integrates a 16-bit successive approximation register (SAR) ADC with up to 1 MSPS sampling rate, configurable hardware averaging (up to 32 samples), and programmable conversion triggers - delivering high-precision sensor measurements suitable for industrial and medical applications where resolution outweighs raw throughput.