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ATSAMD21G18A-AU
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Product Detailed Parameters
- Description：IC MCU 32BIT 256KB FLASH 48TQFP
- Series：SAM D21G, Functional Safety (FuSa)
- Mfr：Microchip Technology
- Package：Tray
- 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)
- Mounting Type：Surface Mount
- Supplier Device Package：48-TQFP (7x7)
- Package / Case：48-TQFP
- Grade：-
- Qualification：-
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Overview
The ATSAMD21G18A-AU is a 32-bit microcontroller based on the ARM Cortex-M0+ core, operating at a maximum frequency of 48MHz. It features 256KB of in-system programmable flash memory and 32KB of SRAM. The device supports a supply voltage range of 1.62V to 3.6V and includes an internal oscillator. Connectivity options include I2C, LINbus, SPI, UART/USART, and USB interfaces. Peripheral functions encompass DMA, I2S, PWM, WDT, power-on reset, and brown-out detection/reset. The component is housed in a 48-TQFP package with dimensions of 7x7mm.
Feature Summary
- Functional Safety (FuSa) compliant design within the SAM D21G series
- Integrated advanced analog peripherals including multiple ADCs and DACs
- Support for low-power operation modes suitable for battery applications
- On-chip debug interface and memory protection unit
Applications
- Industrial control systems requiring functional safety compliance
- Wearable devices and compact consumer electronics
- USB-enabled peripheral devices and host controllers
- Smart home automation nodes and IoT gateways
Procurement Notes
Verify the specific suffix 'AU' corresponds to the 48-TQFP package and commercial temperature range (-40°C to 85°C). Confirm that the Functional Safety (FuSa) designation aligns with your system's safety integrity level requirements. Ensure compatibility with the 1.62V to 3.6V supply voltage range for your target application circuitry.
Selection Notes
Select this component when a balance of processing power, memory capacity, and functional safety certification is required. The 256KB flash provides ample space for complex firmware, while the integrated USB controller simplifies connectivity designs. Consider the 48-TQFP package constraints for PCB layout if space is limited compared to smaller packages like QFN.
Part Context
This MCU belongs to the SAM D21G family, which is specifically engineered for applications demanding higher reliability and functional safety standards compared to standard SAM D21 variants. It shares architectural similarities with the broader SAM D21 series but includes additional certifications and features tailored for industrial and automotive-adjacent environments where fault tolerance is critical.
Replacement Considerations
ATSAMD21G18A-AUT: Same electrical specifications and pinout but rated for extended industrial temperature range (-40°C to 105°C). ATSAMD21J18A-AU: Higher performance variant with increased clock speed and memory, maintaining pin compatibility.
