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The MCX A34 family of mixed-signal MCUs is purpose-built for motor control applications. These devices use high-performance Arm® Cortex®-M33 cores running up to 180 MHz and deliver strong processing performance. MCX A34 MCUs offer flexible memory configurations from 256KB to 1MB Flash and 64KB to 256KB RAM. MCX A34 MCUs are optimized with the math accelerate unit (MAU) engine and integrate 2x FlexPWM modules with 4 submodules, AOI and up to 4x ADCs. They also feature a rich set of serial peripherals including SmartDMA to support complex control and communication needs.

All devices in the family are supported by the MCUXpresso Developer Experience, which streamlines development and accelerates time-to-market for embedded systems.

Data Sheet

Reference Manual

Product Details

Block Diagram

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MCX A345 and A346 MCUs
MCX A343 and A344 MCUs

MCX A345 and A346 MCUs

MCX A343 and A344 MCUs

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Features

Core Platform

Arm® Cortex®-M33 180 MHz

Processing Accelerators

MAU (Math Accelerate Unit), supports trigonometric, reciprocal, square, square root, sine, cosine and arctan algorithms
SmartDMA, co-processor for applications such as parallel camera interface and keypad scanning

Memory

Single-bank flash
- Up to 256 KB Flash with ECC (support one bit correction and two bits detection)
Cache engine with 8 kB RAM
Up to 64 KB RAM of which 8 KB is shared with cache, configurable as up to 8 KB RAM with ECC (support one bit correction and two bits detection)
All RAM can be retained down to deep power Down mode
ROM

Peripherals

Analog

2x 16-bit ADC

Up to 3 Msps in 16-bit mode, and 3.75 Msps in 12-bit mode
Up to 39 ADC input channels total (depending on the package)
Integrated temperature sensor

3x High-speed Comparators with 8 input pins and 8-bit DAC as internal reference

1x LPCMP is functional down to deep power down mode

3 x high-speed comparators with 8 input pins and 8-bit DAC as internal reference

1 x LPCMP is functional down to deep power down mode

3x OPAMP without PGA

Advanced Motor Control Subsys

Up to 2x FlexPWM each with 4 submodules, providing 16 complementary outputs of PWM (no Nanoedge module)
Up to 2x Quadrature Encoder/Decoder (eQDC)
2x AOI (AND/OR/Invert) module support up to 4 output trigger

Timers

3 x 32-bit standard general-purpose asynchronous timers/counters, which support up to four capture inputs and four compare outputs, PWM mode, and external count input. Specific timer events can be selected to generate DMA requests
Low power timer
Frequency measurement timer
Windowed watchdog timer
Wake timer
Micro-tick timer (UTICK)
OS event timer
RTC timer without external 32KHz input

Communication Interfaces for Connectivity

2x LPSPI, 2x LPI2C, 4x LPUART
1x FlexCAN with FD

Security

128-bit Universal Unique Identifier (UUID) per device in accordance with IETF's RFC4122 version5 specification
Device lifecycle management
Flash read/write/execute permission protect by MBC and lockable
Implicit-protected flash region (IFR)
Security monitoring

Code Watchdog for code flow integrity checking
GLIKEY enhances protection against attacks to gain unauthorized access to sensitive registers

Packaging

LQFP100 14x14mm, LQFP64 10x10mm, LQFP48 7x7mm, QFN32 5x5mm

MCUXpresso Developer Experience

MCUXpresso ecosystem support
- Selection of IDE choices
- Pin, clock, peripheral, security and memory config tools
- Security programming and provisioning tools
- Software development kit (SDK)
Zephyr™ RTOS support

Features Table

	Main Clock	Flash	Features	Packages	FRDM Board
MCXA343	180 MHz	128 KB	2x 16 bit ADC w/ 3.0 Msps Up to 3x OpAmp w/o PGA	H-PQFN32 LQFP48 LQFP64 LQFP100	FRDM-MCXA344
MCXA344	180 MHz	256 KB	2x 16 bit ADC w/ 3.0 Msps Up to 3x OpAmp w/o PGA	H-PQFN32 LQFP48 LQFP64 LQFP100	FRDM-MCXA344
MCXA345	180 MHz	512 KB	4x 16 bit ADC w/ 3.2 Msps 1x 12 bit DAC Up to 4x OpAmp w/o PGA	LQFP64 LQFP100 LQFP144 WFBGA169	FRDM-MCXA346
MCXA346	180 MHz	1024 KB	4x 16 bit ADC w/ 3.2 Msps 1x 12 bit DAC Up to 4x OpAmp w/o PGA	LQFP64 LQFP100 LQFP144 WFBGA169	FRDM-MCXA346

Buy/Parametrics

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Design Resources

Design Files

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5 design files

Receive the full breakdown. See the product footprint and more in the eCad file.

Models
MCXA346-A345 IBIS Model Files

7ZRev 0Jan 1, 2026 16:56:00MCXA346-A345-IBIS

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Models
BSDL Files for MCXA346-A345

7ZRev 0Jan 1, 2026 16:31:00MCXA346-A345-BSDL

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Models
BSDL Files for MCXA343-A344

7ZRev 0Jan 1, 2026 16:33:00MCXA343-A344-BSDL

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Models
MCXA344-A343 IBIS Model Files

7ZRev 0Jan 1, 2026 16:57:00MCXA344-A343-IBIS

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Design Files - miscellaneous
MCX A343 BSDLnew

ZIPRev 1.0Jan 27, 2026 08:54:0036 KBMCXA343-A344-BSDL

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Hardware

Quick reference to our board types.

5 hardware offerings

Emulators, Probes, and Programmers
MCU-Link Debug Probe
Active

MCU-LINK
Emulators, Probes, and Programmers
MCU-Link Pro Debug Probe
Active

MCU-LINK-PRO
Evaluation and Development Boards
FRDM Development Board for MCX A343 and MCX A344 MCUs
Active

FRDM-MCXA344
Evaluation and Development Boards
FRDM Development Board for MCX A345 and MCX A346 MCUs
Active

FRDM-MCXA346
Evaluation and Development Boards
FRDM Development Board for MCX A355, A356, A365 and A366 MCUs
Active

FRDM-MCXA366

Software

Quick reference to our software types.

1-5 of 7 software files

Application Example Software
Application Code Hub

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BSPs and Device Drivers
MCUXpresso Config Tools: Pins, Clocks and Peripherals

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Debugging and Visualization Tools
FreeMASTER Run-Time Debugging Tool

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Development IDEs and Build Tools
MCUXpresso for Visual Studio Code

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Development IDEs and Build Tools
eIQ® Time Series Studio for Edge AI Development

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Software Development Resources
Secure Provisioning SDK (SPSDK)

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Software Development Resources
MCUXpresso Secure Provisioning Tool

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Note: For better experience, software downloads are recommended on desktop.

Training

3 trainings

On-Demand
Flexible and Rapid Development with MCUXpresso: Getting Started with Your FRDM Development Boards Featuring MCX MCUs

37 minEnglish Level: Beginner

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On-Demand
Dive Deeper Into NXP's MCUXpresso Ecosystem for Visual Studio Code and Application Development

Our training program on the MCUXpresso ecosystem offers essential insights for embedded development with NXP Microcontrollers.

40 minEnglish Level: Beginner

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On-Demand
Building Secure Images on MCUXpresso Secure Provisioning Tool (SEC)

This demo shows how to use MCUXpresso Secure Provisioning Tool (SEC) to create a secure image with just 6 clicks to protect your software IP.

4 minEnglish Level: Beginner

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MCX Microcontrollers

MCX A34: Mixed-Signal MCUs for Motor Control and High Performance Analog Peripherals

Product Details

Block Diagram

MCX A345 and A346 MCUs

MCX A343 and A344 MCUs

Features

Core Platform

Processing Accelerators

Memory

Peripherals

Security

Packaging

MCUXpresso Developer Experience

Features Table

Related products

Applications

Industrial

Buy/Parametrics

Documentation

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Application Note (19)

Motor Control Project Migration Guide from RA6T2 to MCX A346[AN14882]

Implementation of Window Comparator using MCX A34x[AN14903]

Migrating a Motor Control Application from TMS32F280013x to MCX A34x[AN14866]

MCX A34x Triple-Motor and Interleaved PFC Control using an HVP Board[AN14805]

MPPT Demo Based on MCX A346[AN14856]

Migrating Algorithm from ST CORDIC to NXP Mathematical Acceleration Unit (MAU)[AN14864]

One-Shunt FOC on MCX A[AN14619]

Dual PMSM FOC on MCX A34x[AN14717]

How to Leverage Generative AI to Accelerate Software Development on NXP MCX MCUs[AN14859]

How to Use SmartDMA to Implement SPI Interface on MCXA MCU[AN14822]

System Oscillator Usage for MCX A series[AN14798]

Dual Quadrature Decoder Implementation Using SmartDMA on the MCX A344[AN14823]

Low-Power Implementation on MCXA345 and MCXA346[AN14765]

Using SmartDMA for Keyscan on MCX A Series MCU[AN14770]

Using TX and RX Swap Feature of LPUART in MCX A Series[AN14733]

MAU Usage to Accelerate Mathematical Operations[AN14681]

OPAMP Usage on MCX A3xx[AN14682]

MCX A3xx ADC Performance Benchmarking[AN14679]

HVAC Outdoor Unit Controller Solution based on MCX A34x[AN14708]

Application Note Software (3)

Application Note Software for AN14903[AN14903SW]

MPPT Demo Based on MCX A346[AN14856SW]

Low-Power Implementation on MCXA345 and MCXA346[AN14765SW]

Data Sheet (2)

MCX A343/344[MCXAP100M180F40]

MCXA345/346/355/356/365/366[MCXAP144M240F60]

Errata (1)

Mask Set Errata[MCXA346VLQ-0P89K]

Fact Sheet (1)

MCX A3 Family Facsheet[MCXA3FAMILYFS]

Reference Manual (2)

MCX A345, A346, A355, A356, A365 and A366 Reference Manual[MCXAP144M240F60RM]

MCX A343 and MCX A344 Reference Manual[MCXAP100M180F40RM]

User Guide (2)

MCX A345/346/355/356/365/366 Hardware Design Guide[UG10242]

MCX A343/344 Hardware Design Guide[UG10339]

Motor Control Project Migration Guide from RA6T2 to MCX A346updated

MCX A345/346/355/356/365/366 Hardware Design Guideupdated

Design Resources

Design Files

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MCXA346-A345 IBIS Model Files

BSDL Files for MCXA346-A345

BSDL Files for MCXA343-A344

MCXA344-A343 IBIS Model Files

MCX A343 BSDLnew

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