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ATSAMC21G18A-AUT
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Product Detailed Parameters
- Description：IC MCU 32BIT 256KB FLASH 48TQFP
- Series：SAM C21, Functional Safety (FuSa)
- Mfr：Microchip Technology
- Package：Tape & Reel (TR),Cut Tape (CT)
- Core Processor：ARM® Cortex®-M0+
- Core Size：32-Bit Single-Core
- Speed：48MHz
- Connectivity：CANbus, I2C, LINbus, SPI, UART/USART
- Peripherals：Brown-out Detect/Reset, DMA, POR, 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)：2.7V ~ 5.5V
- Data Converters：A/D 14x12b, 2x16b; 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 ATSAMC21G18A-AUT is a 32-bit microcontroller based on the ARM Cortex-M0+ core, designed for automotive applications under the AEC-Q100 qualification. It features 256 kB of in-system programmable flash memory and 32 kB of SRAM. The device operates with a maximum clock frequency of 48 MHz within the -40°C to +85°C temperature range. It supports a supply voltage range of 2.7 V to 5.5 V and includes 38 general-purpose I/O pins. Key peripherals include multiple communication interfaces such as SPI, USART, I2C, LINbus, and PMBus, alongside 14-channel 12-bit ADCs and a 10-bit DAC.
Feature Summary
- Automotive-grade reliability certified to AEC-Q100 standards for operation in harsh environments.
- Integrated functional safety capabilities supporting system-level safety requirements.
- Versatile connectivity suite including LINbus and PMBus support for automotive networks.
- High-performance analog subsystem with dual 12-bit ADCs and a 10-bit DAC.
Applications
- Automotive body control modules
- Instrument cluster displays
- LIN bus node controllers
- PMBus power management interfaces
Procurement Notes
Verify the specific suffix 'AUT' confirms AEC-Q100 automotive qualification and tape-and-reel packaging. Confirm the operating temperature range matches the -40°C to +85°C specification for your application environment. Ensure the 48-TQFP package dimensions align with your PCB footprint design. Cross-reference the latest datasheet errata for any silicon revisions affecting peripheral behavior or electrical characteristics.
Selection Notes
Select this component when automotive certification is mandatory and LINbus or PMBus integration is required. The 48 MHz speed and 256 kB memory suit complex control logic without excessive cost. Compare against the ATSAMD21 series if automotive qualification is unnecessary, noting the voltage and temperature differences. Consider the ATSAMC20 series if lower pin counts or different memory configurations better fit the board space constraints.
Part Context
This part belongs to the Microchip SAM C21 family, which targets high-performance, low-power embedded applications. The G18 variant specifically denotes the 256 kB flash and 32 kB RAM configuration within the 48-pin package lineup. The AUT suffix distinguishes it from commercial variants by ensuring adherence to automotive quality and reliability standards defined by the Automotive Electronics Council.
Replacement Considerations
ATSAMD21G18A-AU is a commercial equivalent lacking automotive qualification. ATSAMC21J18A-AUT offers similar specifications but in a 64-pin package with additional I/O. ATSAMC20G18A-MUT provides a QFN package option with identical core performance but may differ in specific peripheral availability.
