Microchip Technology ATSAMD21G18A-MUT

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Product attributes Property Value
Manufacturer Microchip Technology
Product Series SAM D21G, Functional Safety (FuSa)
Packaging Cut Tape (CT) | Tape & Reel (TR)
Core Processor ARM® Cortex®-M0+
Core Size 32-Bit Single-Core
Speed 48MHz
Connectivity I2C, LINbus, SPI, UART/USART, USB
Peripherals Brown-out Detect/Reset, DMA, I2S, POR, PWM, WDT
Number of I/O 38
Program Memory Size 256KB (256K x 8)
Program Memory Type FLASH
EEPROM Size -
RAM Size 32K x 8
Voltage - Supply (Vcc/Vdd) 1.62V ~ 3.6V
Data Converters A/D 14x12b; D/A 1x10b
Oscillator Type Internal
Operating Temperature -40°C ~ 85°C (TA)
Grade -
Qualification AEC -
Mounting Type Surface Mount
Supplier Device Package 48-QFN (7x7)
Package / Case 48-VFQFN Exposed Pad
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The Microchip ATSAMD21G18A-MUT is a 32-bit ARM Cortex-M0+ MCU running at 48MHz. It features 256KB flash and 32KB SRAM in a 48-VFQFN package, with a supply range of 1.62V to 3.6V. It includes DMA, I2S, PWM, and brown-out detection, making it a versatile choice for low-power applications.

  • Large Flash (256KB): Provides ample space for complex firmware, RTOS, and application code.
  • Ultra-Low Power: The Cortex-M0+ core and multiple sleep modes enable battery life of years in sensor applications.
  • High-Speed 48MHz: Balances performance and power consumption for responsive yet efficient operation.
  • Flexible Power Supply: 1.62V-3.6V range supports a wide variety of power sources, from single-cell batteries to regulated 3.3V rails.

Wearable Fitness Trackers

The ultra-low-power Cortex-M0+ core with 1.62V operation is perfect for always-on step counting and heart rate monitoring, with 32KB RAM for sensor data buffering.

Smart Home Sensors

Use the 256KB flash to store complex calibration tables and communication stacks for Zigbee or Thread in smart thermostats or door sensors.

Industrial Data Loggers

With DMA and multiple serial interfaces, it can log data from multiple sensors to external memory while running a real-time clock.

Portable GPS Trackers

The 48MHz speed handles GPS decoding algorithms, while the low-power modes extend battery life between location updates.

Consumer Electronics

Control user interfaces with capacitive touch (via external touch controllers) and drive small displays in appliances or remote controls.

Environmental Monitoring

Deploy in remote weather stations, where the wide voltage range accommodates solar-charged batteries and the robust package handles outdoor temperature swings.

Q: What core does this MCU use?
A: It uses an ARM Cortex-M0+ core.
Q: What is the maximum clock speed?
A: It runs at up to 48MHz.
Q: How much flash memory is available?
A: It has 256KB of flash memory.
Q: What is the supply voltage range?
A: It operates from 1.62V to 3.6V.
Base Product Number : ATSAMD21G18A
256KB Flash 32-bit MCU 32KB RAM 48MHz ARM Cortex-M0+ DMA I2S IoT Low Power PWM VFQFN-48
Q: What core does this MCU use?
A: It uses an ARM Cortex-M0+ core.
Q: What is the maximum clock speed?
A: It runs at up to 48MHz.
Q: How much flash memory is available?
A: It has 256KB of flash memory.
Q: What is the supply voltage range?
A: It operates from 1.62V to 3.6V.