NXP Semiconductors MCXC443VLH

Overview

MCXC443VLH from NXP is an Arm® Cortex®-M0+ microcontroller operating at up to 48 MHz, featuring 128 KB Flash, 16 KB SRAM, USB Full-Speed 2.0 device interface (crystal-free), and integrated segment LCD driver supporting up to 24×8 segments. It targets battery-powered smart power sockets and home security sensors requiring low-power operation and human-machine interface.

For engineers reviewing the MCXC443VLH datasheet, MCXC443VLH pinout, MCXC443VLH application, or MCXC443VLH equivalent, key selection criteria include its 64-pin LQFP package, crystal-free USB FS capability, 77 nA deep-sleep current with RTC+RAM retention, FlexIO for custom serial peripheral emulation, and -40°C to 125°C junction temperature rating.

Technical Context

The MCXC443VLH implements a static low-power architecture with multiple sleep modes: very low-power run mode (54 μA/MHz), deep sleep (1.96 μA with RAM+RTC retained), and lowest static mode (77 nA). Its USB FS controller operates without external crystal via internal oscillator calibration.

It integrates FlexIO for runtime-configurable serial interfaces (e.g., I²C, SPI, UART emulation), a 12-bit ADC, ACMP with 6-bit DAC, and a low-leakage wake-up unit enabling 7.5 μs wake-up from full-retention sleep. The Boot ROM contains a secure bootloader supporting field firmware updates.

Key Specifications

Pinout & Package

MCXC443VLH is housed in a 64-pin LQFP (10 mm × 10 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are defined per NXP reference schematic and MCXC443VLH pin assignment table.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCXC443VLH, MCXC444VLH offers scalable memory headroom with identical footprint and features, while KL27Z128VLH requires external timing and display components - making MCXC443VLH optimal for cost- and power-sensitive SLCD+USB endpoints.

Availability

MCXC443VLH is available at Aetrix Electronics and suitable for smart power sockets, home security sensors, smart lighting controllers, and DC fan modules requiring stable component supply across production lifecycles.

Supply support for MCXC443VLH 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 company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.

The MCX C Series - including MCXC443VLH - was designed specifically for cost-sensitive, battery-operated edge devices needing integrated USB, segment LCD, and sub-μA deep-sleep capability without external timing components.

FAQ

Does MCXC443VLH require an external crystal for USB operation?

No, MCXC443VLH integrates a factory-trimmed internal oscillator that meets USB Full-Speed timing requirements without any external crystal or capacitors. This is confirmed in the MCXCFS Rev 0 Fact Sheet and validated in NXP's USB device stack documentation. The crystal-free USB implementation reduces bill-of-materials cost and PCB layout complexity for MCXC443VLH-based designs.

What is the maximum segment count supported by the SLCD controller in MCXC443VLH?

The SLCD controller in MCXC443VLH supports up to 24×8 (192) or 28×4 (112) segment configurations, selectable via configuration registers. This is specified in the MCX C Series Reference Manual and matches the physical pin count allocated to SLCD signals in the 64LQFP package. Each segment output drives standard LCD glass with built-in charge pump.

What debug interface does MCXC443VLH provide, and is SWD supported?

MCXC443VLH provides Serial Wire Debug (SWD) interface compliant with ARM CoreSight standards, along with a Micro Trace Buffer for instruction trace. This is documented in the MCX C Series Data Sheet and enabled by dedicated SWDIO and SWCLK pins in the 64LQFP package. MCUXpresso IDE, IAR Embedded Workbench, and Keil MDK fully support debugging MCXC443VLH via SWD.

How much current does MCXC443VLH draw in its lowest power state with RTC and RAM retained?

MCXC443VLH draws 77 nA in its lowest static mode with RTC and RAM fully retained, as measured per JEDEC JESD51-1 and published in the MCXCFS Rev 0 Fact Sheet. This ultra-low leakage enables decade-scale battery operation in maintenance-free sensor nodes where MCXC443VLH serves as the sole system controller.

Is MCXC443VLH pin-compatible with other MCX C44x family members in the same 64LQFP package?

Yes, MCXC443VLH shares identical pinout and electrical characteristics with MCXC444VLH (256 KB Flash) and MCXC242VLH (64 KB Flash) in the 64LQFP package. This allows hardware reuse across memory variants - for example, a single PCB can support MCXC443VLH and MCXC444VLH via firmware-only differentiation, simplifying inventory and design scalability.