NXP Semiconductors MCXC243VFT

Overview

MCXC243VFT from NXP is an Arm® Cortex®-M0+ microcontroller operating at up to 48 MHz, featuring 128 KB Flash, 16 KB SRAM, 36 GPIOs, USB Full-Speed device interface (crystal-less), and 48-pin QFN package. It targets cost-sensitive, battery-powered applications requiring low-power operation and human-machine interface support.

For engineers reviewing the MCXC243VFT datasheet, MCXC243VFT pinout, MCXC243VFT application, or MCXC243VFT equivalent, key selection considerations include its crystal-less USB FS capability, deep-sleep current of 1.96 µA with RAM+RTC retention, segment LCD support (up to 24×8 segments), 1.71–3.6 V supply range, and -40 to 125°C junction temperature rating.

Technical Context

The MCXC243VFT implements a static low-power architecture with multiple sleep modes: very low-power run mode at 54 µA/MHz and deep sleep at 1.96 µA (RAM + RTC retained). It integrates FlexIO for customizable serial peripheral emulation and supports crystal-less USB FS 2.0 via internal oscillator calibration.

Its analog subsystem includes a 12-bit ADC, ACMP with integrated 6-bit DAC, and internal voltage reference. System-level features include a low-leakage wake-up unit, periodic interrupt timer, real-time clock, and COP software watchdog - all optimized for deterministic response in energy-constrained environments.

Key Specifications

Pinout & Package

MCXC243VFT is housed in a 48-pin QFN package (7 mm × 7 mm, 0.5 mm pitch) with wettable flanks, exposing thermal pad on underside for enhanced thermal dissipation and solder joint inspection.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCXC244VFT, the MCXC243VFT trades Flash/SRAM capacity for lower unit cost while retaining identical USB, SLCD, and low-power capabilities; compared with MCXC143VFT, it adds crystal-less USB FS - enabling hostless firmware updates and peripheral bridging without external components.

Availability

MCXC243VFT is available at Aetrix Electronics and suitable for smart power sockets, home security sensors, DC fan controllers, and smart lighting panels requiring stable component supply across industrial and consumer production programs.

Supply support for MCXC243VFT 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 MCXC243VFT - was designed for cost-sensitive, battery-powered HMI and control applications requiring low-power USB, segment LCD, and robust security in compact packages.

FAQ

Does MCXC243VFT require an external crystal for USB operation?

No, MCXC243VFT does not require an external crystal for USB Full-Speed operation. It uses an internally calibrated oscillator with USB clock recovery, eliminating the need for a 12 MHz crystal and associated load capacitors. This reduces BOM cost and PCB footprint while maintaining USB 2.0 compliance. The MCXC243VFT achieves this through factory-trimmed internal RC oscillator accuracy within ±0.25% over temperature and voltage.

What is the lowest power consumption mode supported by MCXC243VFT?

The lowest power consumption mode of MCXC243VFT is deep sleep with RAM and RTC retained, drawing 1.96 µA. In this mode, the core and most peripherals are powered down, but SRAM contents and real-time clock state remain active. Wake-up sources include GPIO interrupts, RTC alarms, and low-power timers. The MCXC243VFT achieves this via optimized power gating and leakage suppression in its 40 nm process node.

Can MCXC243VFT drive a segment LCD display directly?

Yes, MCXC243VFT integrates a dedicated Segment LCD (SLCD) controller capable of driving up to 24×8 or 28×4 segments directly. It provides COM and SEG outputs with programmable bias and frame frequency, eliminating the need for external display drivers. The MCXC243VFT supports static, 2-, 3-, or 4-mux configurations, and its SLCD module operates independently of the CPU during active display refresh.

What debug interfaces are supported on MCXC243VFT?

MCXC243VFT supports Serial Wire Debug (SWD) interface and includes a Micro Trace Buffer (MTB) for instruction trace capture. SWD enables full JTAG-equivalent debugging with breakpoints, watchpoints, and memory access over two pins (SWDIO and SWCLK). The MTB provides cycle-accurate program flow logging in SRAM, aiding real-time analysis without external trace probes. These features are accessible via standard ARM-compliant debug tools used with the MCXC243VFT.

Is MCXC243VFT pin-compatible with other MCX C24x family members?

Yes, MCXC243VFT is pin-compatible with MCXC242VFM, MCXC244VFM, and MCXC244VFT in the same 48-pin QFN package variant. All share identical pin assignments for power, ground, USB, GPIO, ADC, and SLCD signals. However, peripheral enablement (e.g., USB presence) and memory configuration differ per part number - firmware must be validated for each specific variant. Pin compatibility applies strictly to the 48QFN footprint, not to 32QFN or LQFP variants.