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256 kB Embedded Processors & Controllers

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Program Memory Size = 256 kB

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (GBP) Filter the results in the table by unit price based on your quantity.	Qty.	Mounting Style	Package/Case	Core	Number of I/Os	Data Bus Width	ADC Resolution
ARM Microcontrollers - MCU Ultra-low-power FPU Arm Cortex-M4 MCU 80 MHz 256 Kbytes of Flash LCD, USB, AES-2 STM32L443RCT6 STMicroelectronics 1: £5.16 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	£5.16 £3.95 £3.47 £3.33 £3.08	Min.: 1 Mult.: 1 Max.: 500	SMD/SMT	LQFP-64	ARM Cortex M4	52 I/O	32 bit	12 bit
ARM Microcontrollers - MCU Ultra-low-power FPU Arm Cortex-M4 MCU 80 MHz 256 kbytes of Flash , DFSDM STM32L451VCT6 STMicroelectronics 1: £5.88 1,671In 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	1,671In Stock	£5.88 £4.20 £3.87 £3.76 £3.62	Min.: 1 Mult.: 1 Max.: 500	SMD/SMT	LQFP-100	ARM Cortex M4	83 I/O	32 bit	12 bit
ARM Microcontrollers - MCU Ultra-low-power FPU Arm Cortex-M4 MCU 80 MHz 256 kbytes of Flash USB Device, DFS STM32L452CCU6 STMicroelectronics 1: £5.61 974In 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	974In Stock	£5.61 £4.13 £3.84 £3.38 View £3.20 £2.87	Min.: 1 Mult.: 1 Max.: 500	SMD/SMT	QFN-48	ARM Cortex M4	38 I/O	32 bit	12 bit
ARM Microcontrollers - MCU Ultra-low-power FPU Arm Cortex-M4 MCU 80 MHz 256 Kbytes of Flash LCD, USB OTG, D STM32L476VCT6 STMicroelectronics 1: £7.16 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	£7.16 £5.15 £4.80 £4.49 £4.16	Min.: 1 Mult.: 1 Max.: 500	SMD/SMT	LQFP-100	ARM Cortex M4	82 I/O	32 bit	3 x 12 bit
ARM Microcontrollers - MCU Ultra-low-power FPU Arm Cortex-M33 Trust Zone, MCU 110 MHz 256 kbytes of Flash STM32L552RCT6 STMicroelectronics 1: £7.80 877In 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	877In Stock	£7.80 £6.06 £5.37 £5.03	Min.: 1 Mult.: 1 Max.: 250	SMD/SMT	LQFP-64	ARM Cortex M33	52 I/O	32 bit	2 x 12 bit
32-bit Microcontrollers - MCU 256KB, 144LQFP Ind AT32UC3A3256-ALUT Microchip Technology 1: £12.03 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	£12.03 £10.93 £9.90	Min.: 1 Mult.: 1	SMD/SMT	LQFP-144	AVR	110 I/O	32 bit	10 bit
32-bit Microcontrollers - MCU 32-bit AT32UC3B1256-AUT Microchip Technology 1: £6.48 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	£6.48 £5.88 £5.33	Min.: 1 Mult.: 1	SMD/SMT	TQFP-48	AVR	28 I/O	32 bit	10 bit
32-bit Microcontrollers - MCU UC3C 256K FLASH 64K SRAM AT32UC3C2256C-A2UR Microchip Technology 1: £9.34 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 £9.34 £9.03 Reel £7.70	Min.: 1 Mult.: 1 : 1,500			AVR	45 I/O	32 bit
32-bit Microcontrollers - MCU UC3C 512K FLASH 64K SRAM AT32UC3C2256C-A2UT Microchip Technology 1: £9.19 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	£9.19 £8.35 £7.56	Min.: 1 Mult.: 1	SMD/SMT	TQFP-64	AVR	45 I/O	32 bit	12 bit
ARM Microcontrollers - MCU 256K Flash SRAM 64K ARM based MCU AT91SAM7S256D-MU Microchip Technology 1: £8.68 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	£8.68 £7.90 £7.14	Min.: 1 Mult.: 1	SMD/SMT	QFN-64	ARM7TDMI	32 I/O	32 bit/16 bit	10 bit
8-bit Microcontrollers - MCU AVR 256K FLASH 4K EE 8K SRAM ADC 1.8V ATMEGA2561V-8MU Microchip Technology 1: £11.64 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	£11.64 £10.67 £9.66	Min.: 1 Mult.: 1	SMD/SMT	MLF-64	AVR	54 I/O	8 bit	10 bit
ARM Microcontrollers - MCU MRL A 256K Flash 48K SRAM Ind Temp ATSAM3S4BA-AU Microchip Technology 1: £4.91 1,356In 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	1,356In Stock	£4.91 £4.45 £4.05	Min.: 1 Mult.: 1	SMD/SMT	QFP-64	ARM Cortex M3	47 I/O	32 bit	12 bit
ARM Microcontrollers - MCU LQFPGRNIND TEMPMRL A ATSAM4S4AA-AU Microchip Technology 1: £3.59 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	£3.59 £3.27 £2.97	Min.: 1 Mult.: 1	SMD/SMT	LQFP-48	ARM Cortex M4	34 I/O	32 bit	12 bit
ARM Microcontrollers - MCU LQFPGREENIND ATSAM4S4CA-AU Microchip Technology 1: £4.05 328In Stock	Mfr. Part No. ATSAM4S4CA-AU Mouser Part No 556-ATSAM4S4CA-AU	Microchip Technology	ARM Microcontrollers - MCU LQFPGREENIND Learn More about Microchip Technology atmelsam4s	Datasheet	328In Stock	£4.05 £3.67 £3.33	Min.: 1 Mult.: 1	SMD/SMT	LQFP-100	ARM Cortex M4	79 I/O	32 bit	12 bit
ARM Microcontrollers - MCU Cortx-M0+256KB FLASH ATSAMD20E18A-AUT Microchip Technology 1: £2.42 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 £2.42 £2.33 Reel £2.00 MouseReel Available	Min.: 1 Mult.: 1 : 2,000	SMD/SMT	TQFP-32	ARM Cortex M0	26 I/O	32 bit	12 bit
ARM Microcontrollers - MCU Cortx-M0+256KB FLASH ATSAMD20E18A-MUT Microchip Technology 1: £2.37 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 £2.37 £2.27 Reel £1.96 MouseReel Available	Min.: 1 Mult.: 1 : 5,000	SMD/SMT	QFN-32	ARM Cortex M0	26 I/O	32 bit	12 bit
ARM Microcontrollers - MCU Cortex-M0+ 256KB FLASH 32KB SRAM ATSAMD20J18A-MUT Microchip Technology 1: £2.61 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 £2.61 £2.52 Reel £2.17 MouseReel Available	Min.: 1 Mult.: 1 : 4,000	SMD/SMT	QFN-64	ARM Cortex M0+	52 I/O	32 bit	12 bit
ARM Microcontrollers - MCU 256KB 32QFN GRN 1.6-3.6V 48MHz ATSAMD21E18A-MU Microchip Technology 1: £2.91 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	£2.91 £2.65 £2.40	Min.: 1 Mult.: 1	SMD/SMT	QFN-32	ARM Cortex M0+	26 I/O	32 bit	12 bit
ARM Microcontrollers - MCU 256KB 32KB 48QFN GRN1.6-3.6V48MHz ATSAMD21G18A-MU Microchip Technology 1: £3.06 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	£3.06 £2.78 £2.51	Min.: 1 Mult.: 1	SMD/SMT	QFN-48	ARM Cortex M0+	38 I/O	32 bit	12 bit
ARM Microcontrollers - MCU 256KB 32KB 64TQFP GRN1.6-3.6V48MHz ATSAMD21J18A-AUT Microchip Technology 1: £3.35 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 £3.35 £3.22 Reel £2.77 MouseReel Available	Min.: 1 Mult.: 1 : 1,500	SMD/SMT	TQFP-64	ARM Cortex M0+	52 I/O	32 bit	12 bit
ARM Microcontrollers - MCU 120MHZ 256KB FLASH 6 4 TQFP PKG IN 85C ATSAMD51J18A-AUT Microchip Technology 1: £3.88 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 £3.88 £3.77 Reel £3.21	Min.: 1 Mult.: 1 : 1,500	SMD/SMT	TQFP-64	ARM Cortex M4F	51 I/O	32 bit	12 bit
ARM Microcontrollers - MCU CM4, QFN 48, 256KB Flash, USB,CAN, Indus.85C, Tray ATSAME51G18A-MU Microchip Technology 1: £4.16 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	£4.16 £3.82 £3.46	Min.: 1 Mult.: 1	SMD/SMT	VQFN-48	ARM Cortex M4F	37 I/O	32 bit	12 bit
ARM Microcontrollers - MCU CM4, TQFP 64, 256KFlash,Tray, USB,CAN ,Extended Temp ATSAME51J18A-AF Microchip Technology 1: £4.58 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	£4.58 £4.21 £3.81	Min.: 1 Mult.: 1	SMD/SMT	TQFP-64	ARM Cortex M4F	51 I/O	32 bit	12 bit
ARM Microcontrollers - MCU CM4, TQFP 64, 256KFlash,T&R, USB,CAN ,Extended Temp ATSAME51J18A-AFT Microchip Technology 1: £4.70 1,366In Stock	Mfr. Part No. ATSAME51J18A-AFT Mouser Part No 556-ATSAME51J18A-AFT	Microchip Technology	ARM Microcontrollers - MCU CM4, TQFP 64, 256KFlash,T&R, USB,CAN ,Extended Temp Learn More about Microchip Technology microchip sam e5 mcu	Datasheet	1,366In Stock	Cut Tape £4.70 £4.58 Reel £3.89	Min.: 1 Mult.: 1 : 1,500	SMD/SMT	TQFP-64	ARM Cortex M4F	51 I/O	32 bit	12 bit
ARM Microcontrollers - MCU 120MHZ 256KB FLASH 6 4 TQFP PKG IN 85C ATSAME51J18A-AUT Microchip Technology 1: £4.26 1,468In Stock	Mfr. Part No. ATSAME51J18A-AUT Mouser Part No 556-ATSAME51J18AAUT	Microchip Technology	ARM Microcontrollers - MCU 120MHZ 256KB FLASH 6 4 TQFP PKG IN 85C Learn More about Microchip Technology microchip sam e5 mcu	Datasheet	1,468In Stock	Cut Tape £4.26 £4.14 Reel £3.54	Min.: 1 Mult.: 1 : 1,500	SMD/SMT	TQFP-64	ARM Cortex M4F	51 I/O	32 bit	12 bit