Skip to the content
PCBKitNew board
ATSAMD21E18A-AF on a board, in 3D

ATSAMD21E18A-AF

Microchip Technology

-40℃~+125℃ 1.62V~3.6V 10bit 12bit 256KB 26 32 Bit 32KB 48MHz ARM Cortex-M0+ Built-in FLASH TQFP-32(7x7) Microcontrollers (MCU/MPU/SOC) ROHS

Extended
DatasheetJLCPCBLCSCmicrochip/ATSAMD21E18A-AF
Category
Microcontrollers (MCU, MPU, SOC)
Package
TQFP-32(7x7)
Pins
32

Overview

The ATSAMD21E18A-AF is a microcontroller made by Microchip Technology in a TQFP-32(7x7) package with 32 pins. -40℃~+125℃ 1.62V~3.6V 10bit 12bit 256KB 26 32 Bit 32KB 48MHz ARM Cortex-M0+ Built-in FLASH TQFP-32(7x7) Microcontrollers (MCU/MPU/SOC) ROHS.

PCBKit's library has its KiCad symbol (MCU_Microchip_SAMD:ATSAMD21E18A-A, from KiCad's library) and its footprint (Package_QFP:TQFP-32_7x7mm_P0.8mm, from KiCad's library), ready for a KiCad board. 5 are in stock at JLCPCB (part C618770). 38 open-source boards in 24 repositories on GitHub use it.

Symbol

PA001PA012PA023PA034PA045PA056PA067PA078VDDANA9GND10PA0811PA0912PA1013PA1114PA1415PA1516PA1617PA1718PA1819PA1920PA2221PA2322PA2423PA2524PA2725RESET26PA2827VDDCORE29VDDIN30PA3031PA3132
MCU_Microchip_SAMD:ATSAMD21E18A-AFrom KiCad's library

Footprint

1234567891011121314151617181920212223242526272829303132
Package_QFP:TQFP-32_7x7mm_P0.8mmFrom KiCad's library

From the datasheet

13
Supply, least
1.62 V · VDD, recommended operating, BOD33 disabled, min · p. 936
Supply, most
3.63 V · VDD, recommended operating, max · p. 936
Supply, least
1.62 V · VDDANA, recommended operating, BOD33 disabled, min · p. 936
Supply, most
3.63 V · VDDANA, recommended operating, max · p. 936
Supply, absolute maximum
3.8 V · VDD, absolute maximum · p. 936
Works from
-40 °C · ambient, F package grade, min · p. 936
Works up to
125 °C · ambient, F package grade, max · p. 936
Junction, hottest
145 °C · junction temperature, max · p. 936
Takes working
6.32 mA · active CoreMark, 48 MHz, 3.3 V, 25°C, variant A, typical · p. 868
Takes at most
7.3 mA · active CoreMark, 48 MHz, 3.3 V, 125°C, silicon revision F, max · p. 941
Takes asleep
2.7 µA · standby, XOSC32K and RTC stopped, 25°C, variant A, typical · p. 869
Junction to air (32-pin TQFP)
64.7 K/W · junction to ambient · p. 863
Junction to case (32-pin TQFP)
23.1 K/W · junction to case · p. 863

Parameters

26
ADC (Bit)
12bit
CPU Core
ARM Cortex-M0+
CPU Maximum Speed
48MHz
Core Size
32 Bit
Current - Supply
6.32mA
Current - Supply(Max)
7.3mA
DAC (Bit)
10bit
Direct Memory Access
有
Features
Calendar function
Internal Oscillator
有
Junction Temperature(Max)
145℃
Low-Voltage Detect
有
Number of I/O
26
Operating Temperature
-40℃~+125℃
Oscillator Type
Built-in
Peripheral/Function
PWM；PWM
Program Memory Type
FLASH
Program Storage Size
256KB
RAM Size
32KB
Standby Current
2.7uA
Thermal Resistance(Junction to Ambient)
64.7℃/W
Thermal Resistance(Junction to Case)
23.1℃/W
Universal Serial Bus
有
Voltage - Supply
1.62V~3.63V
Voltage - Supply(Absolute Max)
3.8V
Watchdog
有

Order codes

4

Pinout

32
The pins of the ATSAMD21E18A-AF
PinNameType
1PA00Input/output
2PA01Input/output
3PA02Input/output
4PA03Input/output
5PA04Input/output
6PA05Input/output
7PA06Input/output
8PA07Input/output
9VDDANAPower in
10GNDPower in
11PA08Input/output
12PA09Input/output
13PA10Input/output
14PA11Input/output
15PA14Input/output
16PA15Input/output
17PA16Input/output
18PA17Input/output
19PA18Input/output
20PA19Input/output
21PA22Input/output
22PA23Input/output
23PA24Input/output
24PA25Input/output
25PA27Input/output
26RESETInput
27PA28Input/output
28GNDPassive
29VDDCOREPower out
30VDDINPower in
31PA30Input/output
32PA31Input/output

Open-source boards using it

All 38
  • 4 layers37.6 × 30.6 mmBias generator LT8362, the printed circuit board in 3D

    Bias generator LT8362

    OpenSiPM/sipm-bias-control

    Single channel silicon photomultipliers for high-speed fluorescence imaging

    61 parts44
  • 4 layers44.5 × 34.9 mmEclair, the printed circuit board in 3D

    Eclair

    upbeatcarri/eclair

    Pocket device for taking quick notes, acting as a USB keyboard for PC sync etc., with custom apps samd21, tinygo

    56 parts25
  • 4 layers100 × 100 mmPi TX 35W PA V2, the printed circuit board in 3D

    Pi TX 35W PA V2

    M0LTE/pi-transceiver

    An attempt to build a complete ham radio transceiver around a Raspberry Pi

    185 parts15
  • 4 layers33.6 × 18 mmCap sense ctrl, the printed circuit board in 3D

    Cap sense ctrl

    gregdavill/cap-sense-flex

    A prototype of a flex measuring sensor. Based off: https://dl.acm.org/doi/10.1145/3313831.3376269

    43 parts11
  • 2 layers36.6 × 36.4 mmShirtty, the printed circuit board in 3D

    Shirtty

    sarfata/shirtty-addon

    Badge addon with infrared receive/transmit

    26 parts7
  • 2 layers37 × 39.8 mmWatch, the printed circuit board in 3D

    Watch

    Dragon863/CFWatch

    A watch I built from scratch, inspired by cassette futurism

    54 parts5
  • 2 layers54.6 × 68 mmRng pcb, the printed circuit board in 3D

    Rng pcb

    mitsake/rng-pcb

    A hardware random number generator that uses avalanche noise. Based on the Trinket M0.

    46 parts5CC-BY-SA-4.0
  • 2 layers12 × 30 mmElectric greetings, the printed circuit board in 3D

    Electric greetings

    electricui/electricui-helloboard

    Cute arduino compatible development board for introducing people to Electric UI

    19 parts1

Show this part on your page

A live frame, for any web page
<iframe src="https://pcbkit.io/embed/parts/microchip/ATSAMD21E18A-AF" title="ATSAMD21E18A-AF in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>
A picture
<img src="https://pcbkit.io/embed/parts/microchip/ATSAMD21E18A-AF.jpg" alt="ATSAMD21E18A-AF" width="1200" height="900">
A picture that opens the part, for a README
[![ATSAMD21E18A-AF](https://pcbkit.io/embed/parts/microchip/ATSAMD21E18A-AF.jpg?size=s)](https://pcbkit.io/parts/microchip/ATSAMD21E18A-AF)

Questions

Is there a KiCad symbol and footprint for the ATSAMD21E18A-AF?

Yes. The symbol is MCU_Microchip_SAMD:ATSAMD21E18A-A and the footprint Package_QFP:TQFP-32_7x7mm_P0.8mm, both drawn on this page. PCBKit places them on a board for you when you design with it.

What package is the ATSAMD21E18A-AF?

TQFP-32(7x7), with 32 pins. Its footprint is drawn on this page.

Where is the ATSAMD21E18A-AF datasheet?

Microchip Technology publishes it: the Datasheet link on this page opens it.

Where can I order the ATSAMD21E18A-AF?

JLCPCB lists it as part C618770, with 5 in stock; the sellers' links on this page open their listings.

What can replace the ATSAMD21E18A-AF?

Parts like it in the library: the STM32F051K6T6 by STMicroelectronics, the C8051F350-GQR by Silicon Labs, the ATSAMD21E18A-AU by Microchip Technology and the ATSAMC21E18A-AU by Microchip Technology. Check their datasheets: a part that fits the footprint may still differ in its ratings.

Which open-source boards use the ATSAMD21E18A-AF?

38 boards in 24 repositories on GitHub; the most starred are listed on this page, with their KiCad files.

Parts like it

8