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256 kB Microcontrollers - MCU

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (USD) Filter the results in the table by unit price based on your quantity.	Qty.	Mounting Style	Package/Case	Core	Data Bus Width	Maximum Clock Frequency	Program Memory Size	Data RAM Size	ADC Resolution	Number of I/Os	Supply Voltage - Min	Supply Voltage - Max	Maximum Operating Temperature	Qualification	Packaging
ARM Microcontrollers - MCU Ultra-low-power FPU Arm Cortex-M4 MCU 80 MHz 256 Kbytes of Flash LCD, USB, AES-2 STM32L443CCU6 STMicroelectronics 1: $7.32 1,022In Stock	Mfr. Part No. STM32L443CCU6 Mouser Part No 511-STM32L443CCU6	STMicroelectronics	ARM Microcontrollers - MCU Ultra-low-power FPU Arm Cortex-M4 MCU 80 MHz 256 Kbytes of Flash LCD, USB, AES-2 Learn More about STMicroelectronics stm stm32l4 mcu fpu	Datasheet	1,022In Stock	$7.32 $5.38 $5.01 $4.41 $4.18	Min.: 1 Mult.: 1 Max.: 300	SMD/SMT	QFN-48	ARM Cortex M4	32 bit	80 MHz	256 kB	64 kB	12 bit	38 I/O	1.71 V	3.6 V	+ 85 C		Tray
ARM Microcontrollers - MCU Ultra-low-power FPU Arm Cortex-M4 MCU 80 MHz 256 Kbytes of Flash LCD, USB, AES-2 STM32L443RCT6 STMicroelectronics 1: $6.87 2,488In Stock	Mfr. Part No. STM32L443RCT6 Mouser Part No 511-STM32L443RCT6	STMicroelectronics	ARM Microcontrollers - MCU Ultra-low-power FPU Arm Cortex-M4 MCU 80 MHz 256 Kbytes of Flash LCD, USB, AES-2 Learn More about STMicroelectronics stm stm32l4 mcu fpu	Datasheet	2,488In Stock	$6.87 $5.27 $4.63 $4.43 $4.10	Min.: 1 Mult.: 1 Max.: 500	SMD/SMT	LQFP-64	ARM Cortex M4	32 bit	80 MHz	256 kB	64 kB	12 bit	52 I/O	1.71 V	3.6 V	+ 85 C		Tray
ARM Microcontrollers - MCU Ultra-low-power FPU Arm Cortex-M4 MCU 80 MHz 256 kbytes of Flash , DFSDM STM32L451VCT6 STMicroelectronics 1: $7.83 1,672In Stock	Mfr. Part No. STM32L451VCT6 Mouser Part No 511-STM32L451VCT6	STMicroelectronics	ARM Microcontrollers - MCU Ultra-low-power FPU Arm Cortex-M4 MCU 80 MHz 256 kbytes of Flash , DFSDM Learn More about STMicroelectronics stm stm32l4 mcu fpu	Datasheet	1,672In Stock	$7.83 $5.59 $5.15 $5.01 $4.83	Min.: 1 Mult.: 1 Max.: 500	SMD/SMT	LQFP-100	ARM Cortex M4	32 bit	80 MHz	256 kB	160 kB	12 bit	83 I/O	1.71 V	3.6 V	+ 85 C		Tray
ARM Microcontrollers - MCU Ultra-low-power FPU Arm Cortex-M4 MCU 80 MHz 256 kbytes of Flash USB Device, DFS STM32L452CCU6 STMicroelectronics 1: $7.48 1,149In Stock	Mfr. Part No. STM32L452CCU6 Mouser Part No 511-STM32L452CCU6	STMicroelectronics	ARM Microcontrollers - MCU Ultra-low-power FPU Arm Cortex-M4 MCU 80 MHz 256 kbytes of Flash USB Device, DFS Learn More about STMicroelectronics stm stm32l4 mcu fpu	Datasheet	1,149In Stock	$7.48 $5.50 $5.12 $4.50 View $4.27 $3.83	Min.: 1 Mult.: 1 Max.: 500	SMD/SMT	QFN-48	ARM Cortex M4	32 bit	80 MHz	256 kB	160 kB	12 bit	38 I/O	1.71 V	3.6 V	+ 85 C		Tray
ARM Microcontrollers - MCU Ultra-low-power FPU Arm Cortex-M4 MCU 80 MHz 256 Kbytes of Flash LCD, USB OTG, D STM32L476VCT6 STMicroelectronics 1: $9.53 778In Stock 7,560On Order	Mfr. Part No. STM32L476VCT6 Mouser Part No 511-STM32L476VCT6	STMicroelectronics	ARM Microcontrollers - MCU Ultra-low-power FPU Arm Cortex-M4 MCU 80 MHz 256 Kbytes of Flash LCD, USB OTG, D Learn More about STMicroelectronics stm stm32l4 mcu fpu	Datasheet	778In Stock 7,560On Order On Order Ship Dates Mfr. No: STM32L476VCT6 Stock: 778 Can Dispatch Immediately On Order: 1,620 Expected 24/02/2027 5,940 TBD Factory Lead Time: 52 Weeks	$9.53 $6.86 $6.40 $5.98 $5.54	Min.: 1 Mult.: 1 Max.: 500	SMD/SMT	LQFP-100	ARM Cortex M4	32 bit	80 MHz	256 kB	128 kB	3 x 12 bit	82 I/O	1.71 V	3.6 V	+ 85 C		Tray
ARM Microcontrollers - MCU Ultra-low-power FPU Arm Cortex-M33 Trust Zone, MCU 110 MHz 256 kbytes of Flash STM32L552RCT6 STMicroelectronics 1: $10.38 840In Stock	Mfr. Part No. STM32L552RCT6 Mouser Part No 511-STM32L552RCT6	STMicroelectronics	ARM Microcontrollers - MCU Ultra-low-power FPU Arm Cortex-M33 Trust Zone, MCU 110 MHz 256 kbytes of Flash Learn More about STMicroelectronics stm stm32 l5 mcus	Datasheet	840In Stock	$10.38 $8.07 $7.15 $6.70	Min.: 1 Mult.: 1 Max.: 250	SMD/SMT	LQFP-64	ARM Cortex M33	32 bit	110 MHz	256 kB	256 kB	2 x 12 bit	52 I/O	1.71 V	3.6 V	+ 85 C		Tray
ARM Microcontrollers - MCU Ultra-low-power dual core Arm Cortex-M4 64MHz Cortex-M0+ 32MHz 256Kbytes Flash STM32WB35CCU6A STMicroelectronics 1: $6.71 1,680In Stock	Mfr. Part No. STM32WB35CCU6A Mouser Part No 511-STM32WB35CCU6A	STMicroelectronics	ARM Microcontrollers - MCU Ultra-low-power dual core Arm Cortex-M4 64MHz Cortex-M0+ 32MHz 256Kbytes Flash Learn More about STMicroelectronics stm stm32wb wireless mcu	Datasheet	1,680In Stock	$6.71 $5.58 $5.33 $4.81 View $4.73 $4.55 $4.38	Min.: 1 Mult.: 1	SMD/SMT	UFQFPN-48	ARM Cortex M4	32 bit	32 MHz	256 kB	256 kB	12 bit	72 I/O	1.71 V	3.6 V	+ 105 C		Tray
32-bit Microcontrollers - MCU 256KB, 144LQFP Ind AT32UC3A3256-ALUT Microchip Technology 1: $16.02 335In Stock 480Expected 11/11/2026	Mfr. Part No. AT32UC3A3256-ALUT Mouser Part No 556-AT32UC3A3256ALUT	Microchip Technology	32-bit Microcontrollers - MCU 256KB, 144LQFP Ind Learn More about Microchip Technology microchip a3 a4 series mcus	Datasheet	335In Stock 480Expected 11/11/2026	$16.02 $14.56 $13.19	Min.: 1 Mult.: 1	SMD/SMT	LQFP-144	AVR	32 bit	84 MHz	256 kB	128 kB	10 bit	110 I/O	3 V	3.6 V	+ 85 C		Tray
32-bit Microcontrollers - MCU 32-bit AT32UC3B1256-AUT Microchip Technology 1: $8.63 712In Stock 1,000Expected 05/01/2027	Mfr. Part No. AT32UC3B1256-AUT Mouser Part No 556-AT32UC3B1256-AUT	Microchip Technology	32-bit Microcontrollers - MCU 32-bit Learn More about Microchip Technology microchip b series mcus	Datasheet	712In Stock 1,000Expected 05/01/2027	$8.63 $7.84 $7.11	Min.: 1 Mult.: 1	SMD/SMT	TQFP-48	AVR	32 bit	60 MHz	256 kB	32 kB	10 bit	28 I/O	1.65 V	1.95 V	+ 85 C		Tray
32-bit Microcontrollers - MCU UC3C 256K FLASH 64K SRAM AT32UC3C2256C-A2UR Microchip Technology 1: $12.44 609In Stock	Mfr. Part No. AT32UC3C2256C-A2UR Mouser Part No 556-AT32UC3C2256CA2R	Microchip Technology	32-bit Microcontrollers - MCU UC3C 256K FLASH 64K SRAM Learn More about Microchip Technology microchip c series mcus	Datasheet	609In Stock	Cut Tape $12.44 $12.02 Reel $10.25	Min.: 1 Mult.: 1 : 1,500			AVR	32 bit	66 MHz	256 kB	64 kB		45 I/O	3 V	5.5 V	+ 85 C		Reel, Cut Tape
32-bit Microcontrollers - MCU UC3C 512K FLASH 64K SRAM AT32UC3C2256C-A2UT Microchip Technology 1: $12.24 337In Stock 800Expected 10/12/2026	Mfr. Part No. AT32UC3C2256C-A2UT Mouser Part No 556-AT32UC3C2256CA2T	Microchip Technology	32-bit Microcontrollers - MCU UC3C 512K FLASH 64K SRAM Learn More about Microchip Technology microchip c series mcus	Datasheet	337In Stock 800Expected 10/12/2026	$12.24 $11.12 $10.07	Min.: 1 Mult.: 1	SMD/SMT	TQFP-64	AVR	32 bit	66 MHz	256 kB	64 kB	12 bit	45 I/O	3 V	5.5 V	+ 85 C		Tray
ARM Microcontrollers - MCU 256K Flash SRAM 64K ARM based MCU AT91SAM7S256D-MU Microchip Technology 1: $11.56 309In Stock	Mfr. Part No. AT91SAM7S256D-MU Mouser Part No 556-AT91SAM7S256D-MU	Microchip Technology	ARM Microcontrollers - MCU 256K Flash SRAM 64K ARM based MCU	Datasheet	309In Stock	$11.56 $10.52 $9.51	Min.: 1 Mult.: 1	SMD/SMT	QFN-64	ARM7TDMI	32 bit/16 bit	55 MHz	256 kB	64 kB	10 bit	32 I/O	1.65 V	1.95 V	+ 85 C		Tray
8-bit Microcontrollers - MCU AVR 256K FLASH 4K EE 8K SRAM ADC 1.8V ATMEGA2561V-8MU Microchip Technology 1: $15.50 486In Stock	Mfr. Part No. ATMEGA2561V-8MU Mouser Part No 556-ATMEGA2561V8MU	Microchip Technology	8-bit Microcontrollers - MCU AVR 256K FLASH 4K EE 8K SRAM ADC 1.8V Learn More about Microchip Technology microchip atmega2560 mcus	Datasheet	486In Stock	$15.50 $14.21 $12.87	Min.: 1 Mult.: 1	SMD/SMT	MLF-64	AVR	8 bit	8 MHz	256 kB	8 kB	10 bit	54 I/O	1.8 V	5.5 V	+ 85 C		Tray
ARM Microcontrollers - MCU MRL A 256K Flash 48K SRAM Ind Temp ATSAM3S4BA-AU Microchip Technology 1: $6.54 1,556In Stock	Mfr. Part No. ATSAM3S4BA-AU Mouser Part No 556-ATSAM3S4BA-AU	Microchip Technology	ARM Microcontrollers - MCU MRL A 256K Flash 48K SRAM Ind Temp Learn More about Microchip Technology microchip sam3s mcu	Datasheet	1,556In Stock	$6.54 $5.93 $5.39	Min.: 1 Mult.: 1	SMD/SMT	QFP-64	ARM Cortex M3	32 bit	64 MHz	256 kB	48 kB	12 bit	47 I/O	1.62 V	1.9 V	+ 85 C		Tray
ARM Microcontrollers - MCU LQFPGRNIND TEMPMRL A ATSAM4S4AA-AU Microchip Technology 1: $4.78 831In Stock	Mfr. Part No. ATSAM4S4AA-AU Mouser Part No 556-ATSAM4S4AA-AU	Microchip Technology	ARM Microcontrollers - MCU LQFPGRNIND TEMPMRL A Learn More about Microchip Technology atmelsam4s	Datasheet	831In Stock	$4.78 $4.35 $3.95	Min.: 1 Mult.: 1	SMD/SMT	LQFP-48	ARM Cortex M4	32 bit	120 MHz	256 kB	64 kB	12 bit	34 I/O	1.08 V	1.32 V	+ 85 C		Tray
ARM Microcontrollers - MCU Cortx-M0+256KB FLASH ATSAMD20E18A-AUT Microchip Technology 1: $3.22 4,352In Stock	Mfr. Part No. ATSAMD20E18A-AUT Mouser Part No 556-ATSAMD20E18A-AUT	Microchip Technology	ARM Microcontrollers - MCU Cortx-M0+256KB FLASH Learn More about Microchip Technology atmel samd20 mcu	Datasheet	4,352In Stock	Cut Tape $3.22 $3.11 Reel $2.66 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	SMD/SMT	TQFP-32	ARM Cortex M0	32 bit	48 MHz	256 kB	32 kB	12 bit	26 I/O	1.62 V	1.95 V	+ 85 C		Reel, Cut Tape, MouseReel
ARM Microcontrollers - MCU Cortx-M0+256KB FLASH ATSAMD20E18A-MUT Microchip Technology 1: $3.15 2,543In Stock	Mfr. Part No. ATSAMD20E18A-MUT Mouser Part No 556-ATSAMD20E18A-MUT	Microchip Technology	ARM Microcontrollers - MCU Cortx-M0+256KB FLASH Learn More about Microchip Technology atmel samd20 mcu	Datasheet	2,543In Stock	Cut Tape $3.15 $3.02 Reel $2.60 MouseReel Available	Min.: 1 Mult.: 1 : 5,000	SMD/SMT	QFN-32	ARM Cortex M0	32 bit	48 MHz	256 kB	32 kB	12 bit	26 I/O	1.62 V	1.95 V	+ 85 C		Reel, Cut Tape, MouseReel
ARM Microcontrollers - MCU Cortex-M0+ 256KB FLASH 32KB SRAM ATSAMD20J18A-MUT Microchip Technology 1: $3.48 3,983In Stock	Mfr. Part No. ATSAMD20J18A-MUT Mouser Part No 556-ATSAMD20J18A-MUT	Microchip Technology	ARM Microcontrollers - MCU Cortex-M0+ 256KB FLASH 32KB SRAM Learn More about Microchip Technology atmel samd20 mcu	Datasheet	3,983In Stock	Cut Tape $3.48 $3.36 Reel $2.88 MouseReel Available	Min.: 1 Mult.: 1 : 4,000	SMD/SMT	QFN-64	ARM Cortex M0+	32 bit	48 MHz	256 kB	32 kB	12 bit	52 I/O	1.62 V	1.95 V	+ 85 C		Reel, Cut Tape, MouseReel
ARM Microcontrollers - MCU 256KB 32QFN GRN 1.6-3.6V 48MHz ATSAMD21E18A-MU Microchip Technology 1: $3.87 1,889In Stock	Mfr. Part No. ATSAMD21E18A-MU Mouser Part No 556-ATSAMD21E18A-MU	Microchip Technology	ARM Microcontrollers - MCU 256KB 32QFN GRN 1.6-3.6V 48MHz Learn More about Microchip Technology sam d21 mcus	Datasheet	1,889In Stock	$3.87 $3.53 $3.20	Min.: 1 Mult.: 1	SMD/SMT	QFN-32	ARM Cortex M0+	32 bit	48 MHz	256 kB	32 kB	12 bit	26 I/O	1.62 V	3.63 V	+ 85 C	AEC-Q100	Tray
ARM Microcontrollers - MCU 256KB 32KB 48QFN GRN1.6-3.6V48MHz ATSAMD21G18A-MU Microchip Technology 1: $4.07 2,167In Stock	Mfr. Part No. ATSAMD21G18A-MU Mouser Part No 556-ATSAMD21G18A-MU	Microchip Technology	ARM Microcontrollers - MCU 256KB 32KB 48QFN GRN1.6-3.6V48MHz Learn More about Microchip Technology sam d21 mcus	Datasheet	2,167In Stock	$4.07 $3.70 $3.35	Min.: 1 Mult.: 1	SMD/SMT	QFN-48	ARM Cortex M0+	32 bit	48 MHz	256 kB	32 kB	12 bit	38 I/O	1.62 V	3.63 V	+ 85 C	AEC-Q100	Tray
ARM Microcontrollers - MCU 256KB 32KB 64TQFP GRN1.6-3.6V48MHz ATSAMD21J18A-AUT Microchip Technology 1: $4.46 2,594In Stock	Mfr. Part No. ATSAMD21J18A-AUT Mouser Part No 556-ATSAMD21J18A-AUT	Microchip Technology	ARM Microcontrollers - MCU 256KB 32KB 64TQFP GRN1.6-3.6V48MHz Learn More about Microchip Technology sam d21 mcus	Datasheet	2,594In Stock	Cut Tape $4.46 $4.29 Reel $3.69 MouseReel Available	Min.: 1 Mult.: 1 : 1,500	SMD/SMT	TQFP-64	ARM Cortex M0+	32 bit	48 MHz	256 kB	32 kB	12 bit	52 I/O	1.62 V	3.63 V	+ 85 C	AEC-Q100	Reel, Cut Tape, MouseReel
ARM Microcontrollers - MCU 120MHZ 256KB FLASH 6 4 TQFP PKG 85C ATSAMD51J18A-AU Microchip Technology 1: $5.04 992In Stock	Mfr. Part No. ATSAMD51J18A-AU Mouser Part No 556-ATSAMD51J18AAU	Microchip Technology	ARM Microcontrollers - MCU 120MHZ 256KB FLASH 6 4 TQFP PKG 85C Learn More about Microchip Technology microchip sam d5 e5	Datasheet	992In Stock	$5.04 $4.61 $4.17	Min.: 1 Mult.: 1	SMD/SMT	TQFP-64	ARM Cortex M4F	32 bit	120 MHz	256 kB	128 kB	12 bit	51 I/O	1.71 V	3.6 V	+ 85 C	AEC-Q100	Tray
ARM Microcontrollers - MCU 120MHZ 256KB FLASH 6 4 TQFP PKG IN 85C ATSAMD51J18A-AUT Microchip Technology 1: $5.17 1,198In Stock 1,500Expected 15/01/2027	Mfr. Part No. ATSAMD51J18A-AUT Mouser Part No 556-ATSAMD51J18AAUT	Microchip Technology	ARM Microcontrollers - MCU 120MHZ 256KB FLASH 6 4 TQFP PKG IN 85C Learn More about Microchip Technology microchip sam d5 e5	Datasheet	1,198In Stock 1,500Expected 15/01/2027	Cut Tape $5.17 $5.02 Reel $4.28	Min.: 1 Mult.: 1 : 1,500	SMD/SMT	TQFP-64	ARM Cortex M4F	32 bit	120 MHz	256 kB	128 kB	12 bit	51 I/O	1.71 V	3.6 V	+ 85 C	AEC-Q100	Reel, Cut Tape
ARM Microcontrollers - MCU CM4, QFN 48, 256KB Flash, USB,CAN, Indus.85C, Tray ATSAME51G18A-MU Microchip Technology 1: $5.54 730In Stock	Mfr. Part No. ATSAME51G18A-MU Mouser Part No 556-ATSAME51G18A-MU	Microchip Technology	ARM Microcontrollers - MCU CM4, QFN 48, 256KB Flash, USB,CAN, Indus.85C, Tray Learn More about Microchip Technology microchip sam e5 mcu	Datasheet	730In Stock	$5.54 $5.09 $4.61	Min.: 1 Mult.: 1	SMD/SMT	VQFN-48	ARM Cortex M4F	32 bit	120 MHz	256 kB	128 kB	12 bit	37 I/O	1.71 V	3.63 V	+ 85 C	AEC-Q100	Tray
ARM Microcontrollers - MCU CM4, TQFP 64, 256KFlash,Tray, USB,CAN ,Extended Temp ATSAME51J18A-AF Microchip Technology 1: $6.10 263In Stock	Mfr. Part No. ATSAME51J18A-AF Mouser Part No 556-ATSAME51J18A-AF	Microchip Technology	ARM Microcontrollers - MCU CM4, TQFP 64, 256KFlash,Tray, USB,CAN ,Extended Temp Learn More about Microchip Technology microchip sam e5 mcu	Datasheet	263In Stock	$6.10 $5.61 $5.07	Min.: 1 Mult.: 1	SMD/SMT	TQFP-64	ARM Cortex M4F	32 bit	120 MHz	256 kB	128 kB	12 bit	51 I/O	1.71 V	3.6 V	+ 125 C	AEC-Q100	Tray