A31G346KU

The A31G346KU is a general-purpose 32-bit microcontroller based on the energy-efficient Arm Cortex-M0+ core running up to 48 MHz. It combines up to 256 KB of code Flash and 32 KB of SRAM with a rich set of on-chip peripherals for embedded control, sensor interfacing and real-time system tasks.

With an operating voltage range of 1.8 V to 5.5 V, integrated power management (POR, LVR, LVI, internal RC oscillator, LDO) and multiple low-power modes (RUN, SLEEP, DEEP-SLEEP), the device targets compact, low-power designs requiring reliable timing, analog conversion and peripheral connectivity.

Key Features

• Core Arm® Cortex®-M0+ 32-bit core, up to 48 MHz operation for deterministic control and system responsiveness.
• Memory 256 KB onboard Flash with read protection and 32 KB of SRAM for code and data storage in embedded applications.
• Power and Reset Wide supply range (1.8 V–5.5 V) with Power-On Reset (POR), Low Voltage Reset (LVR), Low Voltage Indicator (LVI) and on-chip LDO. Internal RC oscillator and clock monitoring support robust startup and operation.
• Low-Power Modes RUN, SLEEP and DEEP-SLEEP modes to minimize power consumption in duty-cycled or battery-powered systems.
• Analog 12-bit ADC with up to 1 Msps conversion rate and five analog input channels (A/D – 12-bit) for precise sensor measurement and signal acquisition.
• Timers Multiple timers including six 16-bit timer channels and two 32-bit timer channels supporting PWM, capture, one-shot and timer/counter modes with 12-bit prescaler options.
• Communications Three USART ports and three I²C ports for serial device control and sensor/network connectivity.
• DMA and System Peripherals Four-channel DMA controller with 8/16/32-bit transfers that can accelerate data movement between memory and peripherals; CRC calculation unit supporting CRC-CCITT and CRC-16 modes.
• Reliability and Debug Nested Vectored Interrupt Controller (NVIC) with 29 interrupt sources, 24-bit watchdog timer and Serial Wire Debug (SWD) interface for system robustness and development access.
• Package and I/O 32-QFN package (5 × 5 mm, 0.5 mm pitch) with 26 available I/O pins—suitable for compact surface-mount designs and board-level integration.
• Operating Range Commercial temperature range from −40 °C to 85 °C to support a wide variety of ambient environments.

Typical Applications

• Embedded Control Microcontroller-based control loops, state machines and device management where deterministic execution and integrated timers are required.
• Sensor Hubs Acquisition and preprocessing of analog sensor signals using the 12-bit ADC and DMA to offload the CPU.
• Industrial and Building Automation Timing, scheduling and communication tasks leveraging multiple USART and I²C ports alongside the real-time clock/calendar.
• Consumer and Portable Devices Low-voltage operation and sleep modes enable battery-powered applications that need extended operational life and compact packaging.

Unique Advantages

• Energy-efficient Cortex-M0+ core: Up to 48 MHz processing performance with architectural efficiency well suited to real-time control and low-power operation.
• Comprehensive on-chip integration: 256 KB Flash, 32 KB SRAM, ADC, timers, DMA and multiple serial interfaces reduce BOM count and board area.
• Flexible power management: Wide supply voltage (1.8 V–5.5 V), internal RC oscillator, POR/LVR/LVI and dedicated low-power modes simplify power-aware designs.
• DMA-accelerated data movement: Four DMA channels with 8/16/32-bit transfers speed peripheral-to-memory operations and improve system throughput.
• Robust system features: NVIC with 29 interrupt sources, CRC unit and 24-bit watchdog timer enhance reliability and fault detection.
• Compact SMD package: 32-QFN (5×5 mm) with 26 I/O pins supports high-density, surface-mount applications where board space is constrained.

Why Choose A31G346KU?

The A31G346KU combines a practical balance of compute performance, integrated peripherals and low-power features in a compact 32-QFN package—making it well suited for designers building compact embedded systems that require ADC acquisition, flexible serial connectivity and deterministic timer functionality. Its wide supply range and multiple power-management features allow deployment across battery-powered and mains-powered designs.

For teams seeking a scalable, general-purpose microcontroller platform with on-chip DMA, CRC support and a real-time clock, the A31G346KU offers a well-documented feature set that supports rapid integration and reliable operation across a variety of embedded applications.

Request a quote or submit an inquiry to our sales team to discuss availability, pricing and design support for the A31G346KU.