NXP Semiconductors MCXC143VFT

Overview

MCXC143VFT from NXP is an Arm® Cortex®-M0+ microcontroller operating at up to 48 MHz, featuring 128 KB Flash, 16 KB SRAM, and 40 GPIOs in a 48-pin QFN package. It supports low-power USB Full-Speed device operation without external crystal and includes FlexIO for custom serial peripheral emulation, targeting battery-powered smart power sockets and DC fans.

For engineers reviewing the MCXC143VFT datasheet, MCXC143VFT pinout, MCXC143VFT application, or MCXC143VFT equivalent, key selection criteria include its 1.71–3.6 V supply range, -40 to 125°C junction temperature rating, 54 μA/MHz very low-power run mode, and 1.96 μA deep sleep with RAM + RTC retention.

Technical Context

The MCXC143VFT implements an Arm Cortex-M0+ core with micro trace buffer and NVIC, paired with a low-leakage wake-up unit and DMA controller. Its system-level peripherals include two LPUARTs, two I²C interfaces, two SPI modules, one UART, and a 12-bit ADC with internal reference.

FlexIO enables runtime-configurable serial protocols (e.g., I²S, SPI, UART), while the integrated boot ROM supports secure firmware updates. Power management includes multiple low-power modes: very low-power run (54 μA/MHz), stop (7.5 μs wake-up), and deep sleep (1.96 μA with RAM + RTC retained).

Key Specifications

Pinout & Package

MCXC143VFT is housed in a 48-pin QFN package (7 mm × 7 mm, 0.5 mm pitch) with wettable flank leads for automated optical inspection. Thermal pad on underside requires PCB land pattern per NXP AN12236.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCXC143VFT, MCXC143VFM trades I/O count for smaller footprint, while MCXC243VFT adds USB capability at identical package size-making MCXC143VFT optimal for non-USB, I/O-rich embedded control in cost-sensitive appliances.

Availability

MCXC143VFT is available at Aetrix Electronics and suitable for smart power sockets, DC fan controllers, home security sensor hubs, and smart lighting dimmers requiring stable component supply across production lifecycles.

Supply support for MCXC143VFT 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 targets cost-sensitive, battery-operated edge devices needing low-power processing, flexible I/O, and USB or segment LCD support-designed specifically for smart home and industrial appliance control.

FAQ

What is the maximum operating frequency of the MCXC143VFT?

The MCXC143VFT operates at a maximum core frequency of 48 MHz using its Arm Cortex-M0+ processor. This speed is fully supported across the full 1.71–3.6 V supply range and -40 to 125°C temperature range. The MCU achieves this performance with optimized power efficiency, delivering 54 μA/MHz in very low-power run mode. All timing-critical peripherals-including PWM, ADC, and UART-are specified to function reliably at this clock rate.

Does the MCXC143VFT support USB functionality?

No, the MCXC143VFT does not include USB hardware. Per NXP's official part numbering and family documentation, only MCXC2xx and MCXC4xx variants (e.g., MCXC243VFT) integrate USB FS 2.0 device capability. The MCXC143VFT shares the same 48-pin QFN package and memory configuration but omits the USB PHY and associated D+/D- pins. Engineers selecting MCXC143VFT should plan for UART or I²C-based host communication instead.

What package type and dimensions does the MCXC143VFT use?

The MCXC143VFT uses a 48-pin QFN package measuring 7 mm × 7 mm with 0.5 mm pin pitch and wettable flank leads. The exposed thermal pad on the bottom must be soldered to a dedicated PCB copper area connected to ground for thermal and electrical performance. This package variant is distinct from the 32-pin QFN used by MCXC143VFM and enables higher I/O density for complex control applications requiring 40 GPIOs.

How much SRAM and Flash memory does the MCXC143VFT provide?

The MCXC143VFT integrates 128 KB of on-chip Flash memory and 16 KB of SRAM. The Flash includes error correction circuitry and supports read-while-write operation for robust firmware updates. The SRAM is split into contiguous blocks accessible by CPU and DMA, enabling efficient buffering for sensor data acquisition or communication stacks. Both memory resources are fully available across all operating modes, including low-power run and stop states.

What debug interface does the MCXC143VFT support?

The MCXC143VFT supports SWD (Serial Wire Debug) with Micro Trace Buffer (MTB) for real-time instruction tracing. This interface uses dedicated SWDIO and SWCLK pins and is compatible with standard ARM debug probes (e.g., LPC-Link2, J-Link). The MTB provides 4 KB of on-chip trace memory for non-intrusive code flow analysis without requiring external trace ports. No JTAG support is implemented-SWD is the sole debug access method for MCXC143VFT.