ARM Microcontrollers - MCU

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SAM3U Arm® Cortex®-M3 Flash-Based Microcontrollers

Microchip Technology SAM3U Arm® Cortex®-M3 Flash-Based Microcontrollers are Arm Cortex-M3 Flash Microcontrollers with on-chip high-speed USB Device-and-Transceiver, SDIO/SDCard/MMC, and SPI interfaces. This connectivity, together with the SAM3U's 96MHz/ 1.25 DMIPS/MHz operating frequency, makes the SAM3U the unique Cortex M3 device suited to applications with intensive communications requirements, such as high-speed gateways in industrial, medical, data processing, and consumer applications. For rapid evaluation and code development, industry-leading third parties provide a full range of development tools, RTOS, middleware, and support services to reduce time-to-market to a minimum.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (CAD) Filter the results in the table by unit price based on your quantity.	Qty.	Series	Mounting Style	Package / Case	Core	Program Memory Size	Data Bus Width	ADC Resolution	Maximum Clock Frequency	Number of I/Os	Data RAM Size	Supply Voltage - Min	Supply Voltage - Max	Minimum Operating Temperature	Maximum Operating Temperature	Packaging
ARM Microcontrollers - MCU 128K Flash, 36K SRAM 32-bit ARM Cortex M3 ATSAM3U2CA-CU Microchip Technology 1: $8.76 4,419In Stock	Mfr. Part # ATSAM3U2CA-CU Mouser Part # 556-ATSAM3U2CA-CU	Microchip Technology	ARM Microcontrollers - MCU 128K Flash, 36K SRAM 32-bit ARM Cortex M3 Learn More about Microchip Technology microchip sam3u mcus	Datasheet	4,419In Stock	$8.76 $8.74 $8.34 $8.16 $8.11	Min.: 1 Mult.: 1	SAM3U	SMD/SMT	TFBGA-100	ARM Cortex M3	128 kB	32 bit	12 bit	96 MHz	57 I/O	36 kB	1.62 V	1.95 V	- 40 C	+ 85 C	Tray
ARM Microcontrollers - MCU LQFP, Grn, IT, MRL B ATSAM3U1CB-AU Microchip Technology 1: $6.34 348In Stock	Mfr. Part # ATSAM3U1CB-AU Mouser Part # 556-ATSAM3U1CB-AU	Microchip Technology	ARM Microcontrollers - MCU LQFP, Grn, IT, MRL B Learn More about Microchip Technology microchip sam3u mcus	Datasheet	348In Stock	$6.34 $5.76 $5.75 $5.21	Min.: 1 Mult.: 1	SAM3U	SMD/SMT	LQFP-100	ARM Cortex M3	64 kB	32 bit	12 bit	96 MHz	57 I/O	20 kB	1.62 V	1.95 V	- 40 C	+ 85 C	Tray
ARM Microcontrollers - MCU TFBGA, Grn, IT MRL B ATSAM3U1CB-CU Microchip Technology 1: $9.00 261In Stock	Mfr. Part # ATSAM3U1CB-CU Mouser Part # 556-ATSAM3U1CB-CU	Microchip Technology	ARM Microcontrollers - MCU TFBGA, Grn, IT MRL B Learn More about Microchip Technology microchip sam3u mcus	Datasheet	261In Stock	$9.00 $8.18 $7.76 $7.75	Min.: 1 Mult.: 1	SAM3U	SMD/SMT	TFBGA-100	ARM Cortex M3	64 kB	32 bit	12 bit	96 MHz	57 I/O	20 kB	1.62 V	1.95 V	- 40 C	+ 85 C	Tray
ARM Microcontrollers - MCU 128K Flash, 36K SRAM 32-bit ARM Cortex M3 ATSAM3U2CA-AU Microchip Technology 1: $9.01 287In Stock	Mfr. Part # ATSAM3U2CA-AU Mouser Part # 556-ATSAM3U2CA-AU	Microchip Technology	ARM Microcontrollers - MCU 128K Flash, 36K SRAM 32-bit ARM Cortex M3 Learn More about Microchip Technology microchip sam3u mcus	Datasheet	287In Stock	$9.01 $8.19 $7.44	Min.: 1 Mult.: 1	SAM3U	SMD/SMT	LQFP-100	ARM Cortex M3	128 kB	32 bit	12 bit	96 MHz	57 I/O	36 kB	1.62 V	1.95 V	- 40 C	+ 85 C	Tray
ARM Microcontrollers - MCU 256K Flash, 52K SRAM 32-bit ARM Cortex M3 ATSAM3U4EA-AU Microchip Technology 1: $13.26 1,650In Stock	Mfr. Part # ATSAM3U4EA-AU Mouser Part # 556-ATSAM3U4EA-AU	Microchip Technology	ARM Microcontrollers - MCU 256K Flash, 52K SRAM 32-bit ARM Cortex M3 Learn More about Microchip Technology microchip sam3u mcus	Datasheet	1,650In Stock	$13.26 $12.08 $10.93	Min.: 1 Mult.: 1	SAM3U	SMD/SMT	LQFP-144	ARM Cortex M3	256 kB	32 bit	12 bit	96 MHz	96 I/O	52 kB	1.62 V	1.95 V	- 40 C	+ 85 C	Tray
ARM Microcontrollers - MCU 128K Flash, 36K SRAM 32-bit ARM Cortex M3 ATSAM3U2EA-AU Microchip Technology 1: $11.62 57In Stock	Mfr. Part # ATSAM3U2EA-AU Mouser Part # 556-ATSAM3U2EA-AU	Microchip Technology	ARM Microcontrollers - MCU 128K Flash, 36K SRAM 32-bit ARM Cortex M3 Learn More about Microchip Technology microchip sam3u mcus	Datasheet	57In Stock	$11.62 $10.57 $9.58	Min.: 1 Mult.: 1	SAM3U	SMD/SMT	LQFP-144	ARM Cortex M3	128 kB	32 bit	12 bit	96 MHz	96 I/O	36 kB	1.62 V	1.95 V	- 40 C	+ 85 C	Tray
ARM Microcontrollers - MCU 256K Flash, 52K SRAM 32-bit ARM Cortex M3 ATSAM3U4CA-AU Microchip Technology 1: $10.97 86In Stock 180Expected 2027-02-25	Mfr. Part # ATSAM3U4CA-AU Mouser Part # 556-ATSAM3U4CA-AU	Microchip Technology	ARM Microcontrollers - MCU 256K Flash, 52K SRAM 32-bit ARM Cortex M3 Learn More about Microchip Technology microchip sam3u mcus	Datasheet	86In Stock 180Expected 2027-02-25	$10.97 $9.98 $9.03	Min.: 1 Mult.: 1	SAM3U	SMD/SMT	LQFP-100	ARM Cortex M3	256 kB	32 bit	12 bit	96 MHz	57 I/O	52 kB	1.62 V	1.95 V	- 40 C	+ 85 C	Tray
ARM Microcontrollers - MCU 128K Flash, 36K SRAM 32-bit ARM Cortex M ATSAM3U2EA-CU Microchip Technology 1: $11.43 4In Stock	Mfr. Part # ATSAM3U2EA-CU Mouser Part # 556-ATSAM3U2EA-CU	Microchip Technology	ARM Microcontrollers - MCU 128K Flash, 36K SRAM 32-bit ARM Cortex M Learn More about Microchip Technology microchip sam3u mcus	Datasheet	4In Stock	$11.43 $10.40 $9.42	Min.: 1 Mult.: 1	SAM3U	SMD/SMT	LFBGA-144	ARM Cortex M3	128 kB	32 bit	12 bit	96 MHz	96 I/O	36 kB	1.62 V	1.95 V	- 40 C	+ 85 C	Tray
ARM Microcontrollers - MCU 256K Flash, 52K SRAM 32-bit ARM Cortex M3 ATSAM3U4EA-CU Microchip Technology 1: $14.33 184Expected 2027-03-11	Mfr. Part # ATSAM3U4EA-CU Mouser Part # 556-ATSAM3U4EA-CU	Microchip Technology	ARM Microcontrollers - MCU 256K Flash, 52K SRAM 32-bit ARM Cortex M3 Learn More about Microchip Technology microchip sam3u mcus	Datasheet	184Expected 2027-03-11	$14.33 $13.02 $11.79	Min.: 1 Mult.: 1	SAM3U	SMD/SMT	LFBGA-144	ARM Cortex M3	256 kB	32 bit	12 bit	96 MHz	96 I/O	52 kB	1.62 V	1.95 V	- 40 C	+ 85 C	Tray
ARM Microcontrollers - MCU LQFP, Grn, IT, MRL B ATSAM3U1EB-AU Microchip Technology 120: $8.96 Non-Stocked Lead-Time 12 Weeks	Mfr. Part # ATSAM3U1EB-AU Mouser Part # 556-ATSAM3U1EB-AU	Microchip Technology	ARM Microcontrollers - MCU LQFP, Grn, IT, MRL B Learn More about Microchip Technology microchip sam3u mcus	Datasheet	Non-Stocked Lead-Time 12 Weeks	$8.96	Min.: 120 Mult.: 60	SAM3U	SMD/SMT	LQFP-144	ARM Cortex M3	64 kB	32 bit	12 bit	96 MHz	96 I/O	20 kB	1.62 V	1.95 V	- 40 C	+ 85 C	Tray
ARM Microcontrollers - MCU LFBGA, Grn, IT MRL B ATSAM3U1EB-CU Microchip Technology 184: $8.74 Non-Stocked Lead-Time 11 Weeks	Mfr. Part # ATSAM3U1EB-CU Mouser Part # 556-ATSAM3U1EB-CU	Microchip Technology	ARM Microcontrollers - MCU LFBGA, Grn, IT MRL B Learn More about Microchip Technology microchip sam3u mcus	Datasheet	Non-Stocked Lead-Time 11 Weeks	$8.74	Min.: 184 Mult.: 184	SAM3U	SMD/SMT	LFBGA-144	ARM Cortex M3	64 kB	32 bit	12 bit	96 MHz	96 I/O	20 kB	1.62 V	1.95 V	- 40 C	+ 85 C	Tray
ARM Microcontrollers - MCU 256K Flash, 52K SRAM 32-bit ARM Cortex M3 ATSAM3U4CA-CU Microchip Technology 1: $11.82 Non-Stocked Lead-Time 10 Weeks	Mfr. Part # ATSAM3U4CA-CU Mouser Part # 556-ATSAM3U4CA-CU	Microchip Technology	ARM Microcontrollers - MCU 256K Flash, 52K SRAM 32-bit ARM Cortex M3 Learn More about Microchip Technology microchip sam3u mcus	Datasheet	Non-Stocked Lead-Time 10 Weeks	$11.82 $10.77 $9.76	Min.: 1 Mult.: 1	SAM3U	SMD/SMT	TFBGA-100	ARM Cortex M3	256 kB	32 bit		96 MHz	57 I/O	52 kB	1.62 V	1.95 V	- 40 C	+ 85 C	Tray

SAM3U Arm® Cortex®-M3 Flash-Based Microcontrollers

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