Manufacturer Part Number

ATSAMD21E15B-AUT

Description

This is a Microchip Technology 32-bit microcontroller with 32KB Flash memory, based on the ARM Cortex-M0+ core. It features integrated functional safety (FuSa) features, is designed for embedded applications, and comes in a 32-pin TQFP (7x7mm) package. It is suitable for use where safety and reliable embedded control are needed. The device runs at up to 48MHz, has a variety of communication interfaces, and is RoHS compliant. Stock availability is currently 4240 pieces, brand new and original.

Specifications

Core Processor: ARM Cortex-M0+

Core Size: 32-Bit, Single-Core

Maximum Speed: 48MHz

Program Memory Size: 32KB (32K x 8), Flash type

RAM Size: 4KB (4K x 8)

Package: 32-TQFP (7x7mm)

Operating Voltage: 1.62V to 3.6V

Operating Temperature: -40°C to +85°C

I/O Pins: 26

Data Converters: 10 channels 12-bit ADC, 1 channel 10-bit DAC

Peripherals: Brown-out Detect/Reset, DMA, I2S, Power-on Reset, PWM, Watchdog Timer

Connectivity: I2C, LINbus, SPI, UART/USART, USB

Oscillator: Integrated Internal Oscillator

RoHS Status: ROHS3 Compliant

Moisture Sensitivity Level: MSL 3 (168 hours)

REACH Status: Unaffected by REACH

ECCN: 3A991A2

HTSUS: 8542.31.0001

Device Structure

This device features a single-core, 32-bit ARM Cortex-M0+ processor implemented on a substrate with integrated flash, RAM, and digital/analog peripherals. The microcontroller has 32 pins in a TQFP body, 26 of which are general-purpose I/O. It includes built-in A/D and D/A converters and a USB transceiver.

Performance Characteristics

High CPU performance at 48MHz core speed

Fast, flexible connectivity (I2C, SPI, UART/USART, LINbus, USB)

32KB programmable flash supports complex embedded functions

Integrated safety functions for demanding or regulated applications

Wide supply voltage (1.62V – 3.6V) and industrial temperature range

Integrated analog features (ADC, DAC) support sensor and measurement applications

Robust watchdog and brown-out detection for reliable operation

Power-saving features, suitable for battery-powered devices

Application Environments

Industrial automation

Consumer electronics

Safety-critical systems with FuSa requirements

IoT and wireless sensor nodes

Handheld or battery-powered equipment

USB-connected embedded devices

Home and building automation controllers

Automotive body electronics (LINbus connectivity)

Selection Guidelines

Choose this part for cost-effective, general-purpose ARM Cortex-M0+ embedded applications needing up to 32KB Flash memory

Suitable where small package size (32-TQFP, 7x7mm) is required

Recommended if you need a mix of serial interfaces, basic analog conversion, and strong safety monitoring

Evaluate RAM and flash size for your application software needs

Check IO count and peripheral mix against your hardware requirements

For higher memory, speed, or more peripherals, consider other members of the SAM D21 family

Usage Considerations

Observe MSL level 3 handling during assembly (168-hour floor life at 30°C/60% RH after dry pack opening)

Supply voltage must remain within 1.62V–3.6V for proper operation

External decoupling capacitors recommended for stable analog/digital performance

Use onboard safety and reset circuits for reliability in critical applications

Flash memory is reprogrammable, providing efficient updates during development or in field

Be aware of USB ESD and EMC requirements during board design

Industrial temperature capability allows use in harsh environments

GPIO voltage logic levels follow supply voltage

Potential Equivalent/Replacement Models

There are many variants within the SAM D21 family; possible alternatives depend on required flash/RAM size, peripheral set, and package type

Typical equivalents include:

ATSAMD21E15A-AUT (alternative temperature grades, safety options)

ATSAMD21E16B-AUT (with 64KB Flash)

ATSAMD21G15B-AUT (larger package, more IO)

ATSAMD21J15B-AUT (even more IO, different package)

ATSAMD20 series (no FuSa, but similar core)

ATSAMC21 series (for higher integration or CAN support)

For a precise replacement or drop-in equivalent, match supply voltage range, speed, memory size, package, and safety/documentation level

If none of these suit your requirements or if you need other makes/models, contact our website Ariat-Tech sales team for further consultation and sourcing options

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