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ATSAMD21J16
  • ATSAMD21J16
  • ATSAMD21J16
  • ATSAMD21J16
  • ATSAMD21J16
  • ATSAMD21J16
  • ATSAMD21J16

ATSAMD21J16

In Production

NOTE: ATSAMD21J16A is not recommended for new designs, please use ATSAMD21J16B.A low-power, high-performance Microchip's ARM® Cortex®-M0+ based flash microcontroller, the ATSAMD21J16 is ideal for a wide range of home automation, consumer, metering, and industrial applications. It features:64KB of flash and 8KB of SRAMUp to 48MHz operating frequencySix serial communication modules (SERCOM) configurable as UART/USART, SPI or I2C, five 16-bit timer/counters, 32-bit Real-Time Clock and calendar, 24 PWM channels, one 20-channel 12-bit ADC, one 10-bit DACFull Speed USB Device and embedded HostSupport for up to 256 touch channels1.62V to 3.63V power supplyEasy pin migration to SAMD21G and SAMD21J devicesSupported by Atmel Studio, ASF and the SAM D21 Xplained Pro kitSupported by MPLAB X IDE and MP...

Microchip Technology ATSAMD21J16 Product Info

16 April 2026 0

Parameters

Part Family

SAMD21

CPU Type

Cortex-M0+

MaxSpeed (MHz)

48

Program Memory Size (KB)

64

SRAM (KB)

8

Temp. Range Min.

-40

Temp. Range Max.

125

Operation Voltage Min.(V)

1.62

Operation Voltage Max.(V)

3.63

SPI

6

I2C

6

UART

6

QSPI

0

Crypto Engine

No

Internal Oscillator

32khz, 32Khz ULP, 8Mhz

Pin Count

64

Features

  • Single-cycle hardware multiplier
  • Micro Trace Buffer
  • 64KB in-system self-programmable Flash
  • 8KB SRAM Memory
  • Power-on reset (POR) and brown-out detection (BOD)
  • Internal and external clock options with 48MHDigital Frequency Locked Loop (DFLL48M) and 48MHto 96MHFractional
  • External Interrupt Controller (EIC)
  • 16 external interrupts
  • One non-maskable interrupt
  • Two-pin Serial Wire Debug (SWD) programming, test and debugging interface
  • Drop in compatible with SAM D20
  • Idle and standby sleep modes
  • SleepWalking peripherals
  • 12-channel Direct Memory Access Controller (DMAC)
  • 12-channel Event System
  • One 16-bit TC with compare/capture channels
  • One 8-bit TC with compare/capture channels
  • One 32-bit TC with compare/capture channels, by using two TCs
  • Up to four compare channels with optional complementary output
  • Generation of synchronized pulse width modulation (PWM) pattern across port pins
  • Deterministic fault protection, fast decay and configurable dead-time between complementary output
  • Dithering that increase resolution with up to 5 bit and reduce quantization error
  • 32-bit Real Time Counter (RTC) with clock/calendar function
  • Watchdog Timer (WDT)
  • CRC-32 generator
  • Embedded device function
  • Eight endpoints
  • USART with full-duplex and single-wire half-duplex configuration
  • I2C Bus up to 3.4MHz
  • SMBUS/PMBUS
  • SPI
  • LIN slave
  • Differential and single-ended input
  • 1/2x to 16x programmable gain stage
  • Automatic offset and gain error compensation
  • Oversampling and decimation in hardware to support 13-, 14-, 15- or 16-bit resolution
  • 10-bit, 350ksps Digital-to-Analog Converter (DAC)
  • Two Analog Comparators (AC) with window compare function
  • 256-channel capacitive touch and proximity sensing
  • 52 GPIO pins
  • 64-pin TQFP, QFN, UFBGA
  • 1.62V – 3.63V

    • Description

    NOTE: ATSAMD21J16A is not recommended for new designs, please use ATSAMD21J16B.

    A low-power, high-performance Microchip's ARM® Cortex®-M0+ based flash microcontroller, the ATSAMD21J16 is ideal for a wide range of home automation, consumer, metering, and industrial applications. It features:

    • 64KB of flash and 8KB of SRAM
    • Up to 48MHz operating frequency
    • Six serial communication modules (SERCOM) configurable as UART/USART, SPI or I2C, five 16-bit timer/counters, 32-bit Real-Time Clock and calendar, 24 PWM channels, one 20-channel 12-bit ADC, one 10-bit DAC
    • Full Speed USB Device and embedded Host
    • Support for up to 256 touch channels
    • 1.62V to 3.63V power supply
    • Easy pin migration to SAMD21G and SAMD21J devices
    • Supported by Atmel Studio, ASF and the SAM D21 Xplained Pro kit

    Supported by MPLAB X IDE and MPLAB Harmony.

    Functional Safety

    This device supports the ISO 26262 (ASIL B), IEC 61508 (SIL 2) and IEC 60730 (Class B) functional safety standards.  

    ·   The Functional Safety Manual, FMEDA and information on the Diagnostic Software are available under NDA through the request form on the 32-bit Microcontrollers Functional Safety web page.

    ·   To request any information about the SIL 2 STL, please fill out and submit the request form on Industrial Safety Self-Test Library web page.

    ·  Learn more about  32-bit MCUs with Functional Safety capabilities including device hardware and certified software libraries. 

     

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