NXP Semiconductors MKL43Z128VLH4

Overview

MKL43Z128VLH4 from NXP Semiconductors (formerly Freescale) is a 48 MHz ARM® Cortex®-M0+ microcontroller with 128 KB flash, 16 KB SRAM, and integrated USB Full-Speed 2.0 device controller operating crystal-less. It features segment LCD support up to 24×8 segments, a 16-bit 818 ksps ADC with internal voltage reference, and operates from 1.71–3.6 V across –40 to 105 °C for battery-powered HMI and sensor edge nodes.

For engineers reviewing the MKL43Z128VLH4 datasheet, MKL43Z128VLH4 pinout, MKL43Z128VLH4 application, or MKL43Z128VLH4 equivalent, this page delivers verified electrical specs, low-power mode behavior (1.96 µA in VLLS3), FlexIO peripheral emulation capability, and confirmed LQFP-64 package mapping - all validated against Rev. 5 (08/2015) technical data.

Technical Context

The MKL43Z128VLH4 implements an ARM Cortex-M0+ core with tightly coupled 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), and crystal support from 32 kHz to 32 MHz.

Peripherals include one USB FS 2.0 controller with on-chip regulator (no external crystal required), three UARTs (one ISO7816-compliant), two I²C modules (up to 1 Mbit/s), two SPIs (up to 24 Mbit/s), one I²S interface, and a FlexIO module capable of emulating UART, SPI, I²C, PWM, or custom serial protocols in hardware.

Key Specifications

Pinout & Package

Package: 64-pin LQFP, 10 mm × 10 mm, 0.5 mm pitch, 1.6 mm height - RoHS-compliant, reflow-solderable, and compatible with standard automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MKL27Z128VLH4, MKL43Z128VLH4 adds crystal-less USB FS and segment LCD - critical for portable HMI. Against MKE15Z128VLH4, it trades CAN FD and upgraded analog for USB and lower system-level power in VLLS3 mode.

Availability

MKL43Z128VLH4 is available at Aetrix Electronics and suitable for smart meter displays, portable medical sensors, industrial HMI panels, and low-power IoT gateways requiring stable component supply and long-term lifecycle support.

Supply support for MKL43Z128VLH4 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 applications, with deep expertise in ARM-based microcontrollers and edge processing.

The Kinetis KL43 series was designed specifically for cost-sensitive, battery-powered applications requiring integrated USB connectivity and segment LCD driving - targeting portable instrumentation, energy monitoring, and wearable health devices.

FAQ

What is the maximum operating frequency and core architecture of the MKL43Z128VLH4?

The MKL43Z128VLH4 features an ARM Cortex-M0+ core rated for up to 48 MHz operation. It includes a Micro Trace Buffer for instruction trace, bit manipulation engine, and NVIC with configurable priority levels. The core executes Thumb-2 instructions with deterministic interrupt latency under 10 ns, making it suitable for real-time control tasks in the MKL43Z128VLH4-based designs.

Does the MKL43Z128VLH4 support crystal-less USB Full-Speed operation?

Yes, the MKL43Z128VLH4 integrates a USB FS 2.0 device controller with an on-chip 3.3 V regulator and internal timing recovery - enabling full-speed (12 Mbps) USB communication without an external 12 MHz crystal. This capability is explicitly documented in the Rev. 5 datasheet section 3.8.1 and reduces BOM cost and PCB footprint in the MKL43Z128VLH4 implementation.

What are the low-power mode current specifications for the MKL43Z128VLH4?

The MKL43Z128VLH4 achieves 1.96 µA in VLLS3 mode (RAM + RTC retained) at 3.0 V and 25 °C, and down to 0.18 µA in VLLS0 mode (all peripherals disabled). These values are measured per Table 9 of the Rev. 5 datasheet and reflect actual characterized behavior - critical for battery-life estimation in MKL43Z128VLH4-powered portable devices.

How many ADC channels and what resolution does the MKL43Z128VLH4 provide?

The MKL43Z128VLH4 includes a single 16-bit successive approximation register (SAR) ADC module with up to 16 input channels in single-ended mode or 8 in differential mode. It achieves 818 ksps sampling rate and ±1.5 LSB integral nonlinearity (INL) using the internal 1.2 V reference - specifications confirmed in Section 3.6.1 of the Rev. 5 datasheet for the MKL43Z128VLH4.

What package type and pin count does the MKL43Z128VLH4 use?

The MKL43Z128VLH4 is supplied in a 64-pin LQFP package (10 mm × 10 mm, 0.5 mm pitch, 1.6 mm height), as specified in the Ordering Information table and Package Drawing 98ASS23234W1. This package is lead-free, RoHS-compliant, and supports standard reflow soldering - identical to the physical form factor used across the KL43ZxxVLH4 ordering variants.