ATSAMD21G18A-UU

Microchip Technology

-40℃~+85℃ 1.62V~3.6V 256KB 32 Bit 32KB 38 48MHz ARM Cortex-M0+ Built-in FLASH WLCSP-45 Microcontrollers (MCU/MPU/SOC) ROHS

Extended

Datasheetmicrochip/ATSAMD21G18A-UU

Category: Microcontrollers (MCU, MPU, SOC)
Package: WLCSP-45
Pins: 45

Overview

The ATSAMD21G18A-UU is a microcontroller made by Microchip Technology in a WLCSP-45 package with 45 pins. -40℃~+85℃ 1.62V~3.6V 256KB 32 Bit 32KB 38 48MHz ARM Cortex-M0+ Built-in FLASH WLCSP-45 Microcontrollers (MCU/MPU/SOC) ROHS.

PCBKit's library has its KiCad symbol (MCU_Microchip_SAM:ATSAMD21G18AU-SAMD21GU, from PCBKit's generic symbols) and its footprint (EasyEDA_Cloud:WLCSP-45_L3.0-W2.7_ATSAMD21G17A, from EasyEDA), ready for a KiCad board. JLCPCB lists it (part C618374).

Symbol

MCU_Microchip_SAM:ATSAMD21G18AU-SAMD21GUFrom PCBKit's generic symbols

Footprint

EasyEDA_Cloud:WLCSP-45_L3.0-W2.7_ATSAMD21G17AFrom EasyEDA

Parameters

CPU Core: ARM Cortex-M0+
CPU Maximum Speed: 48MHz
Core Size: 32 Bit
Features: Power-on reset (POR), Undervoltage detection (BOR/LVD/LVR/LVI), Watchdog reset, Built-in general-purpose timer, Hardware CRC, Programmable watchdog, Calendar function, Touch function
Number of I/O: 38
Operating Temperature: -40℃~+85℃
Oscillator Type: Built-in
Program Memory Type: FLASH
Program Storage Size: 256KB
RAM Size: 32KB
Voltage - Supply: 1.62V~3.6V

Order codes

ATSAMD21G18A-UUTLCSC C618374

Pinout

The pins of the ATSAMD21G18A-UU
Pin	Name	Type
A2	PA27	Input/output
A4	PA28	Input/output
A6	GNDIO	Unspecified
A8	VDDCORE	Unspecified
A10	VDDIN	Unspecified
A12	PB02	Input/output
B1	PA25	Input/output
B3	VDDIO	Unspecified
B5	RESET_N	Unspecified
B7	PA30	Input/output
B9	PA31	Input/output
B11	PB03	Input/output
B13	PA01	Input/output
C2	PA24	Input/output
C4	GNDIO	Unspecified
C6	PA22	Input/output
C8	PA03	Input/output
C10	PA02	Input/output
C12	PA00	Input/output
D1	PA21	Input/output
D3	PA23	Input/output
D5	PA16	Input/output
D7	PA12	Input/output
D9	PB08	Input/output
D11	PB04	Input/output
D13	GNDANA	Unspecified
E2	PA20	Input/output
E4	PA19	Input/output
E6	PA09	Input/output
E8	PA06	Input/output
E10	PB09	Input/output
E12	VDDANA	Unspecified
F1	PA18	Input/output
F3	PA17	Input/output
F5	PA13	Input/output
F7	PA11	Input/output
F9	PA08	Input/output
F11	PA05	Input/output
F13	PA04	Input/output
G2	PA15	Input/output
G4	PA14	Input/output
G6	GNDIO	Unspecified
G8	VDDIO	Unspecified
G10	PA10	Input/output
G12	PA07	Input/output

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Questions

Is there a KiCad symbol and footprint for the ATSAMD21G18A-UU?

Yes. The symbol is MCU_Microchip_SAM:ATSAMD21G18AU-SAMD21GU and the footprint EasyEDA_Cloud:WLCSP-45_L3.0-W2.7_ATSAMD21G17A, both drawn on this page. PCBKit places them on a board for you when you design with it.

What package is the ATSAMD21G18A-UU?

WLCSP-45, with 45 pins. Its footprint is drawn on this page.

Where is the ATSAMD21G18A-UU datasheet?

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

Where can I order the ATSAMD21G18A-UU?

JLCPCB lists it as part C618374, with 0 in stock; the sellers' links on this page open their listings.

What can replace the ATSAMD21G18A-UU?

Parts like it in the library: the ATSAMD20G17A-UU by Microchip Technology and the ATSAMD21G17A-UU by Microchip Technology. Check their datasheets: a part that fits the footprint may still differ in its ratings.