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ARM Cortex M3 Core Microcontrollers - MCU

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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	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	Packaging
ARM Microcontrollers - MCU Leopard Gecko MCU IC 256KB EFM32LG842F256G-F-QFP64R Silicon Labs 1: £8.87 5,787In Stock	Mfr. Part No. EFM32LG842F256G-F-QFP64R Mouser Part No 634-32LG842256GFQFPR	Silicon Labs	ARM Microcontrollers - MCU Leopard Gecko MCU IC 256KB Learn More about Silicon Labs energymicro efm32leopard	Datasheet	5,787In Stock	Cut Tape £8.87 £6.95 £6.46 £5.93 Reel £5.40 View £5.88 £5.53 £5.12	Min.: 1 Mult.: 1 : 1,000	SMD/SMT	TQFP-64	ARM Cortex M3	32 bit	48 MHz	256 kB	32 kB	12 bit	53 I/O	1.98 V	3.8 V	+ 85 C	Reel, Cut Tape
ARM Microcontrollers - MCU QFP144,GREEN IND TEMP, MRL A ATSAM3X4EA-AU Microchip Technology 1: £9.87 1,227In Stock	Mfr. Part No. ATSAM3X4EA-AU Mouser Part No 556-ATSAM3X4EA-AU	Microchip Technology	ARM Microcontrollers - MCU QFP144,GREEN IND TEMP, MRL A Learn More about Microchip Technology microchip sam3x mcu	Datasheet	1,227In Stock	£9.87 £8.98 £8.13 £8.12	Min.: 1 Mult.: 1	SMD/SMT	LQFP-144	ARM Cortex M3	32 bit	84 MHz	256 kB	64 kB	12 bit	103 I/O	1.62 V	1.95 V	+ 85 C	Tray
ARM Microcontrollers - MCU ARM Cortex-M3 32-bit 40 MHz 256 kB MCU EFM32JG1B100F256GM32-C0 Silicon Labs 1: £4.05 6,730In Stock	Mfr. Part No. EFM32JG1B100F256GM32-C0 Mouser Part No 634-JG1B100F256GM32C	Silicon Labs	ARM Microcontrollers - MCU ARM Cortex-M3 32-bit 40 MHz 256 kB MCU Learn More about Silicon Labs silabs efm32 jade gecko mcu	Datasheet	6,730In Stock	£4.05 £3.08 £2.84 £2.58 View £2.44 £2.37 £2.34 £2.31 Quote	Min.: 1 Mult.: 1	SMD/SMT	QFN-32	ARM Cortex M3	32 bit	40 MHz	256 kB	32 kB	12 bit	24 I/O	1.85 V	3.8 V	+ 85 C	Tray
ARM Microcontrollers - MCU Leopard Gecko MCU IC 256KB EFM32LG230F256G-F-QFN64 Silicon Labs 1: £8.38 2,584In Stock	Mfr. Part No. EFM32LG230F256G-F-QFN64 Mouser Part No 634-32LG230F256GFQFN	Silicon Labs	ARM Microcontrollers - MCU Leopard Gecko MCU IC 256KB Learn More about Silicon Labs energymicro efm32leopard	Datasheet	2,584In Stock	£8.38 £6.66 £6.12 £5.67 View £5.39 £5.28 £5.17 Quote	Min.: 1 Mult.: 1	SMD/SMT	QFN-64	ARM Cortex M3	32 bit	48 MHz	256 kB	32 kB	12 bit	56 I/O	1.98 V	3.8 V	+ 85 C	Tray
ARM Microcontrollers - MCU 128K Flash, 36K SRAM 32-bit ARM Cortex M3 ATSAM3U2CA-CU Microchip Technology 1: £4.57 4,419In Stock	Mfr. Part No. ATSAM3U2CA-CU Mouser Part No 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	£4.57 £4.56 £4.35 £4.26 £4.23	Min.: 1 Mult.: 1	SMD/SMT	TFBGA-100	ARM Cortex M3	32 bit	96 MHz	128 kB	36 kB	12 bit	57 I/O	1.62 V	1.95 V	+ 85 C	Tray
ARM Microcontrollers - MCU QFP100,GREEN IND TEMP, MRLA ATSAM3X8CA-AU Microchip Technology 1: £8.45 1,101In Stock	Mfr. Part No. ATSAM3X8CA-AU Mouser Part No 556-ATSAM3X8CA-AU	Microchip Technology	ARM Microcontrollers - MCU QFP100,GREEN IND TEMP, MRLA Learn More about Microchip Technology microchip sam3x mcu	Datasheet	1,101In Stock	£8.45 £7.70 £7.60 £6.96	Min.: 1 Mult.: 1	SMD/SMT	LQFP-100	ARM Cortex M3	32 bit	84 MHz	512 kB	64 kB	12 bit	63 I/O	1.62 V	1.95 V	+ 85 C	Tray
ARM Microcontrollers - MCU 32BIT Cortex M3 512B Flash 100pin STM32F103VET6 STMicroelectronics 1: £8.33 25,653In Stock	Mfr. Part No. STM32F103VET6 Mouser Part No 511-STM32F103VET6	STMicroelectronics	ARM Microcontrollers - MCU 32BIT Cortex M3 512B Flash 100pin Learn More about STMicroelectronics stm32f1	Datasheet	25,653In Stock	£8.33 £6.93 £6.15 £5.88 View £5.79 £5.63 £5.55 Quote	Min.: 1 Mult.: 1	SMD/SMT	LQFP-100	ARM Cortex M3	32 bit	72 MHz	512 kB	64 kB	12 bit	80 I/O	2 V	3.6 V	+ 85 C	Tray
ARM Microcontrollers - MCU Mainstream ARM M3 1Mb 72 MHz USB CAN STM32F103VGT6 STMicroelectronics 1: £9.95 11,010In Stock	Mfr. Part No. STM32F103VGT6 Mouser Part No 511-STM32F103VGT6	STMicroelectronics	ARM Microcontrollers - MCU Mainstream ARM M3 1Mb 72 MHz USB CAN Learn More about STMicroelectronics stm32f1	Datasheet	11,010In Stock	£9.95 £8.07 £7.60 £7.36 View £7.09 £6.99 £6.56	Min.: 1 Mult.: 1	SMD/SMT	LQFP-100	ARM Cortex M3	32 bit	72 MHz	1 MB	96 kB	12 bit	112 I/O	2 V	3.6 V	+ 85 C	Tray
ARM Microcontrollers - MCU 32BIT Cortex M3 512KB Perform Line STM32F103ZEH7 STMicroelectronics 1: £12.17 2,525In Stock	Mfr. Part No. STM32F103ZEH7 Mouser Part No 511-STM32F103ZEH7	STMicroelectronics	ARM Microcontrollers - MCU 32BIT Cortex M3 512KB Perform Line Learn More about STMicroelectronics stm32f1	Datasheet	2,525In Stock	£12.17 £9.58 £8.71 £8.21 View £7.94 £7.73 £6.99 Quote	Min.: 1 Mult.: 1	SMD/SMT	BGA-144	ARM Cortex M3	32 bit	72 MHz	512 kB	64 kB	12 bit	112 I/O	2 V	3.6 V	+ 105 C	Tray
ARM Microcontrollers - MCU 128k Flash, 16k RAM, AES EFM32G222F128G-E-QFP48R Silicon Labs 1: £5.81 3,414In Stock	Mfr. Part No. EFM32G222F128G-E-QFP48R Mouser Part No 634-32G222128GEFP48R	Silicon Labs	ARM Microcontrollers - MCU 128k Flash, 16k RAM, AES	Datasheet	3,414In Stock	Cut Tape £5.81 £4.48 £4.13 £3.78 Reel £3.39 View £3.50 £3.22	Min.: 1 Mult.: 1 : 1,000	SMD/SMT	TQFP-48	ARM Cortex M3	32 bit	32 MHz	128 kB	16 kB	12 bit	37 I/O	1.98 V	3.8 V	+ 85 C	Reel, Cut Tape
ARM Microcontrollers - MCU 5.50 V, PSoC 5 CapSense Plus CY8C5668AXI-LP034 Infineon Technologies 1: £20.31 2,442In Stock	Mfr. Part No. CY8C5668AXI-LP034 Mouser Part No 727-CY8C5668AXILP034	Infineon Technologies	ARM Microcontrollers - MCU 5.50 V, PSoC 5 CapSense Plus Learn More about Infineon Technologies cypress psoc5lp	Datasheet	2,442In Stock	£20.31 £16.73 £14.97 £14.50 View £13.25 £13.24	Min.: 1 Mult.: 1	SMD/SMT	TQFP-100	ARM Cortex M3	32 bit	67 MHz	256 kB	64 kB	12 bit	72 I/O	1.71 V	1.89 V	+ 85 C	Tray
ARM Microcontrollers - MCU 32BIT Cortex M3 128K FLASH 20KB RAM STM32F103RBT6 STMicroelectronics 1: £6.96 13,785In Stock	Mfr. Part No. STM32F103RBT6 Mouser Part No 511-STM32F103RBT6	STMicroelectronics	ARM Microcontrollers - MCU 32BIT Cortex M3 128K FLASH 20KB RAM Learn More about STMicroelectronics stm32f1	Datasheet	13,785In Stock	£6.96 £5.34 £4.77 £4.55 £4.29	Min.: 1 Mult.: 1	SMD/SMT	LQFP-64	ARM Cortex M3	32 bit	72 MHz	128 kB	20 kB	12 bit	64 I/O	2 V	3.6 V	+ 85 C	Tray
ARM Microcontrollers - MCU Mainstream Performance line, Arm Cortex-M3 MCU 1 Mbyte of Flash 72 MHz CPU, moto STM32F103RGT6TR STMicroelectronics 1: £11.80 3,000In Stock 1,000Expected 27/11/2026	Mfr. Part No. STM32F103RGT6TR Mouser Part No 511-STM32F103RGT6TR	STMicroelectronics	ARM Microcontrollers - MCU Mainstream Performance line, Arm Cortex-M3 MCU 1 Mbyte of Flash 72 MHz CPU, moto Learn More about STMicroelectronics stm32f1	Datasheet	3,000In Stock 1,000Expected 27/11/2026	Cut Tape £11.80 £9.26 £8.44 £7.94 View Reel £6.63 £7.79 £7.33 £6.63 Quote MouseReel Available	Min.: 1 Mult.: 1 : 1,000	SMD/SMT	LQFP-64	ARM Cortex M3	32 bit	72 MHz	1 MB	96 kB	12 bit	112 I/O	2 V	3.6 V	+ 85 C	Reel, Cut Tape, MouseReel
ARM Microcontrollers - MCU PSOC 5LP ANLOG 67MHZ,256K FLASH CY8C5468AXI-LP106 Infineon Technologies 1: £11.71 3,032In Stock	Mfr. Part No. CY8C5468AXI-LP106 Mouser Part No 727-CY8C5468AXILP106	Infineon Technologies	ARM Microcontrollers - MCU PSOC 5LP ANLOG 67MHZ,256K FLASH Learn More about Infineon Technologies cypress psoc5lp	Datasheet	3,032In Stock	£11.71 £9.11 £8.23 £7.73 View £7.43 £6.98 £6.84 Quote	Min.: 1 Mult.: 1	SMD/SMT	TQFP-100	ARM Cortex M3	32 bit	67 MHz	256 kB	64 kB	12 bit	72 I/O	1.71 V	1.89 V	+ 85 C	Tray
ARM Microcontrollers - MCU 32BIT CORTEX M3 128K Flash 20KB RAM STM32F103VBT6TR STMicroelectronics 1: £7.34 8,732In Stock	Mfr. Part No. STM32F103VBT6TR Mouser Part No 511-STM32F103VBT6TR	STMicroelectronics	ARM Microcontrollers - MCU 32BIT CORTEX M3 128K Flash 20KB RAM Learn More about STMicroelectronics stm32f1	Datasheet	8,732In Stock	Cut Tape £7.34 £5.71 £5.05 £4.85 Reel £3.92 View £4.76 £4.49 £3.88 Quote MouseReel Available	Min.: 1 Mult.: 1 : 1,000	SMD/SMT	LQFP-100	ARM Cortex M3	32 bit	72 MHz	128 kB	20 kB	12 bit	100 I/O	2 V	3.6 V	+ 85 C	Reel, Cut Tape, MouseReel
ARM Microcontrollers - MCU Ultra-low-power Arm Cortex-M3 MCU 512 Kbytes of Flash 32 MHz CPU, USB, 2xOp-amp STM32L152VET6 STMicroelectronics 1: £9.37 2,241In Stock	Mfr. Part No. STM32L152VET6 Mouser Part No 511-STM32L152VET6	STMicroelectronics	ARM Microcontrollers - MCU Ultra-low-power Arm Cortex-M3 MCU 512 Kbytes of Flash 32 MHz CPU, USB, 2xOp-amp Learn More about STMicroelectronics stm32l1	Datasheet	2,241In Stock	£9.37 £7.04 £6.48 £6.26 View £5.94 £5.52 £5.51	Min.: 1 Mult.: 1	SMD/SMT	LQFP-100	ARM Cortex M3	32 bit	32 MHz	512 kB	80 kB	12 bit	83 I/O	1.65 V	3.6 V	+ 85 C	Tray
ARM Microcontrollers - MCU 256kB flash, 64kB SRAM, USB, LQFP100 package LPC1765FBD100K NXP Semiconductors 1: £10.83 5,650In Stock	Mfr. Part No. LPC1765FBD100K Mouser Part No 771-LPC1765FBD100K	NXP Semiconductors	ARM Microcontrollers - MCU 256kB flash, 64kB SRAM, USB, LQFP100 package Learn More about NXP Semiconductors nxp_lpc17xx	Datasheet	5,650In Stock	£10.83 £8.68 £8.07 £7.76 View £7.29 £7.11 Quote	Min.: 1 Mult.: 1	SMD/SMT	LQFP-100	ARM Cortex M3	32 bit	100 MHz	256 kB	64 kB	12 bit	70 I/O	3.3 V	3.3 V	+ 85 C	Tray
RF Microcontrollers - MCU SimpleLink Bluetooth low enrgy Wirels MC A 595-CC2640R2FRGZR CC2640R2FRGZT Texas Instruments 1: £5.12 6,056In Stock	Mfr. Part No. CC2640R2FRGZT Mouser Part No 595-CC2640R2FRGZT	Texas Instruments	RF Microcontrollers - MCU SimpleLink Bluetooth low enrgy Wirels MC A 595-CC2640R2FRGZR Learn More about Texas Instruments ti cc2640r2f simplelink	Datasheet	6,056In Stock	Cut Tape £5.12 £3.92 £3.62 £3.30 Reel £3.13 View £3.04 £3.00 £2.97 MouseReel Available	Min.: 1 Mult.: 1 : 250	SMD/SMT	VQFN-48	ARM Cortex M3	32 bit	48 MHz	128 kB	20 kB	12 bit	31 I/O	1.8 V	3.8 V	+ 85 C	Reel, Cut Tape, MouseReel
ARM Microcontrollers - MCU MCU,M3,120MHz,1MBMem/130kBRAM,QFP100 TMPM3HNF10BFG Toshiba 1: £9.77 1,795In Stock	Mfr. Part No. TMPM3HNF10BFG Mouser Part No 757-TMPM3HNF10BFG	Toshiba	ARM Microcontrollers - MCU MCU,M3,120MHz,1MBMem/130kBRAM,QFP100 Learn More about Toshiba tmpm3h arm microcontrollers		1,795In Stock	£9.77 £8.09 £7.20 £7.04 View £6.68 £6.48 Quote	Min.: 1 Mult.: 1	SMD/SMT	LQFP-100	ARM Cortex M3	32 bit	120 MHz			12 bit	92 I/O	2.7 V	5.5 V	+ 105 C	Tray
ARM Microcontrollers - MCU ARM 32Bit Value Line 64-Pin 32kB Flash STM32F100RCT6B STMicroelectronics 1: £6.17 3,768In Stock	Mfr. Part No. STM32F100RCT6B Mouser Part No 511-STM32F100RCT6B	STMicroelectronics	ARM Microcontrollers - MCU ARM 32Bit Value Line 64-Pin 32kB Flash Learn More about STMicroelectronics stm32f1	Datasheet	3,768In Stock	£6.17 £4.77 £4.20 £3.93 View £3.40 £3.34 £3.30	Min.: 1 Mult.: 1	SMD/SMT	LQFP-64	ARM Cortex M3	32 bit	24 MHz	256 kB	24 kB	12 bit	51 I/O	2 V	3.6 V	+ 85 C	Tray
ARM Microcontrollers - MCU 32BIT Cortex M3 USB CAN 7 TMRS 2 ADCS STM32F103RBT6TR STMicroelectronics 1: £6.60 19,406In Stock	Mfr. Part No. STM32F103RBT6TR Mouser Part No 511-STM32F103RBT6TR	STMicroelectronics	ARM Microcontrollers - MCU 32BIT Cortex M3 USB CAN 7 TMRS 2 ADCS Learn More about STMicroelectronics stm32f1	Datasheet	19,406In Stock	Cut Tape £6.60 £5.11 £4.50 £4.32 Reel £3.61 View £4.23 £4.00 £3.37 Quote MouseReel Available	Min.: 1 Mult.: 1 : 1,000	SMD/SMT	LQFP-64	ARM Cortex M3	32 bit	72 MHz	128 kB	20 kB	12 bit	51 I/O	2 V	3.6 V	+ 85 C	Reel, Cut Tape, MouseReel
ARM Microcontrollers - MCU 32BIT Cortex M3 128K 20KB RAM 2X12 ADC STM32F103VBT6 STMicroelectronics 1: £6.05 5,565In Stock	Mfr. Part No. STM32F103VBT6 Mouser Part No 511-STM32F103VBT6	STMicroelectronics	ARM Microcontrollers - MCU 32BIT Cortex M3 128K 20KB RAM 2X12 ADC Learn More about STMicroelectronics stm32f1	Datasheet	5,565In Stock	£6.05 £4.95 £4.61 £4.30 View £4.21 £3.88 £3.82	Min.: 1 Mult.: 1	SMD/SMT	LQFP-100	ARM Cortex M3	32 bit	72 MHz	128 kB	20 kB	12 bit	100 I/O	2 V	3.6 V	+ 85 C	Tray
ARM Microcontrollers - MCU 32BIT Cortex M3 256kB Flash 100pin STM32F103VCT6 STMicroelectronics 1: £6.79 12,339In Stock	Mfr. Part No. STM32F103VCT6 Mouser Part No 511-STM32F103VCT6	STMicroelectronics	ARM Microcontrollers - MCU 32BIT Cortex M3 256kB Flash 100pin Learn More about STMicroelectronics stm32f1	Datasheet	12,339In Stock	£6.79 £5.55 £5.16 £4.79 View £4.70 £4.24 £4.13	Min.: 1 Mult.: 1	SMD/SMT	LQFP-100	ARM Cortex M3	32 bit	72 MHz	256 kB	48 kB	12 bit	80 I/O	2 V	3.6 V	+ 85 C	Tray
ARM Microcontrollers - MCU Mainstream Perform ARM Cortex-M3 MCU STM32F103ZGT6TR STMicroelectronics 1: £13.84 1,456In Stock	Mfr. Part No. STM32F103ZGT6TR Mouser Part No 511-STM32F103ZGT6TR	STMicroelectronics	ARM Microcontrollers - MCU Mainstream Perform ARM Cortex-M3 MCU Learn More about STMicroelectronics stm32f1	Datasheet	1,456In Stock	Cut Tape £13.84 £10.84 £10.05 £9.27 £8.94 Reel £8.28 MouseReel Available	Min.: 1 Mult.: 1 : 500	SMD/SMT	LQFP-144	ARM Cortex M3	32 bit	72 MHz	1 MB	96 kB	12 bit	112 I/O	2 V	3.6 V	+ 85 C	Reel, Cut Tape, MouseReel
RF Microcontrollers - MCU SimpleLink 32-bit A rm Cortex -M3 Bluet A 595-CC2640R2FRGZT CC2640R2FRGZR Texas Instruments 1: £4.43 4,754In Stock	Mfr. Part No. CC2640R2FRGZR Mouser Part No 595-CC2640R2FRGZR	Texas Instruments	RF Microcontrollers - MCU SimpleLink 32-bit A rm Cortex -M3 Bluet A 595-CC2640R2FRGZT Learn More about Texas Instruments ti cc2640r2f simplelink	Datasheet	4,754In Stock	Cut Tape £4.43 £3.47 £3.20 £2.91 View Reel £2.58 £2.76 £2.68 £2.65 £2.58 MouseReel Available	Min.: 1 Mult.: 1 : 2,500	SMD/SMT	VQFN-48	ARM Cortex M3	32 bit	48 MHz	128 kB	20 kB	12 bit	31 I/O	1.8 V	3.8 V	+ 85 C	Reel, Cut Tape, MouseReel