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ATSAMC21E18A-AUT

MCHPATSAMC21E18A-AUT

Microchip Technology
ARM® Cortex®-M0+ SAM C21, Functional Safety (FuSa) Microcontroller IC 32-Bit 48MHz 256KB (256K x 8) FLASH 32-TQFP (7x7)
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Overview

The ATSAMC21E18A-AUT is a 32-bit ARM Cortex-M0+ microcontroller designed for robust industrial and automotive applications. It operates at 48MHz and features 256KB of flash and 32KB of RAM, with a wide supply voltage range from 2.7V to 5.5V. This part stands out for its integrated dual CAN-FD interfaces and hardware-driven Functional Safety (FuSa) features.

Why Choose This Part

The SAM C21 series is optimized for 5V operation, providing superior noise immunity compared to standard 3.3V microcontrollers. It includes specialized hardware for functional safety, such as a cyclic redundancy check (CRC) engine and a windowed watchdog timer, making it suitable for ISO 26262 and IEC 61508 applications.

Applications

Industrial CAN-FD Gateways
Utilizing the dual CAN-FD interfaces for high-speed data translation between industrial sensor networks.
Automotive Body Control
Managing lighting, wipers, or window motors in 5V automotive electrical subsystems requiring AEC-Q100 compliance.
Safety-Critical Appliances
Implementing IEC 60730 Class B safety standards for household appliances using built-in hardware safety mechanisms.
Motor Control Inverters
Driving power stages in 5V environments where high noise immunity and robust peripheral sets are required.

Key Specifications

Speed 48MHz
RAM Size 32K x 8
Core Size 32-Bit
Peripherals Brown-out Detect/Reset, DMA, POR, WDT
Connectivity CANbus, I2C, LINbus, SPI, UART/USART
Mounting Type Surface Mount
Number of I/O 26
Core Processor ARM Cortex-M0+
Package / Case 32-TQFP
Data Converters A/D 10x12b, 1x16b; D/A 1x10b
Oscillator Type Internal
Program Memory Size 256KB (256K x 8)
Program Memory Type FLASH
Operating Temperature -40degC ~ 85degC (TA)
Supplier Device Package 32-TQFP (7x7)
Voltage - Supply (Vcc/Vdd) 2.7V ~ 5.5V

Getting Started

Development is best supported by the SAM C21 Xplained Pro evaluation kit (ATSAMC21-XPRO). Use Microchip Studio or MPLAB X IDE with the XC32 compiler and Harmony v3 framework for rapid peripheral configuration. Firmware can be uploaded via standard SWD debuggers such as the Atmel-ICE or PICkit 4.

ATSAMC21E Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number Package Temp Range Stock
ATSAMC21E18A-AUT (this part) TQFP-32 -40degC ~ 85degC (.. 6,834
ATSAMC21E18A-MNT VFQFN-32 -40degC ~ 105degC .. 8,761
ATSAMC21E18A-MUT VFQFN-32 -40degC ~ 85degC (.. 56,668

Also Consider

ATSAMC21J18A-AUT MCHPMicrochip Technology - Provides a higher pin count (64-pin TQFP) for applications requiring more I/O and additional serial channels.