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ARM Cortex M3 Core Embedded Processors & Controllers

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Core = ARM Cortex M3

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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.	Product Type	Mounting Style	Package/Case	Core	Data Bus Width	Maximum Clock Frequency	Program Memory Size	Data RAM Size	ADC Resolution	Number of I/Os	Minimum Operating Temperature	Maximum Operating Temperature	Packaging
ARM Microcontrollers - MCU ARM Cortex-M3 32-bit 40 MHz 256 kB MCU EFM32JG1B200F256GM48-C0 Silicon Labs 1: £4.00 2,597Expected 18/01/2027	Mfr. Part No. EFM32JG1B200F256GM48-C0 Mouser Part No 634-JG1B200F25648C0	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	2,597Expected 18/01/2027	£4.00 £3.15 £2.84 £2.63 View £2.48 £2.43 £2.38 £2.37	Min.: 1 Mult.: 1	ARM Microcontrollers - MCU	SMD/SMT	QFN-48	ARM Cortex M3	32 bit	40 MHz	256 kB	32 kB	12 bit	32 I/O	- 40 C	+ 85 C	Tray
ARM Microcontrollers - MCU Mainstream Valueline ARM Cortex-M3 MCU STM32F100VBT7B STMicroelectronics 1: £6.10 248In Stock	Mfr. Part No. STM32F100VBT7B Mouser Part No 511-STM32F100VBT7B	STMicroelectronics	ARM Microcontrollers - MCU Mainstream Valueline ARM Cortex-M3 MCU Learn More about STMicroelectronics stm32f1	Datasheet	248In Stock	£6.10 £4.37 £4.00 £3.88 View £3.58 £3.53 £3.48	Min.: 1 Mult.: 1	ARM Microcontrollers - MCU	SMD/SMT		ARM Cortex M3	32 bit	24 MHz	128 kB	8 kB	12 bit	80 I/O	- 40 C	+ 105 C	Tray
ARM Microcontrollers - MCU High-performance Arm Cortex-M3 MCU 1 Mbyte of Flash , 120 MHz CPU, ART Accel STM32F205RGT6W STMicroelectronics 1: £15.21 44In Stock NRND	Mfr. Part No. STM32F205RGT6W Mouser Part No 511-STM32F205RGT6W NRND	STMicroelectronics	ARM Microcontrollers - MCU High-performance Arm Cortex-M3 MCU 1 Mbyte of Flash , 120 MHz CPU, ART Accel Learn More about STMicroelectronics stm32f2	Datasheet	44In Stock	£15.21 £12.06 £11.14 £10.32 View £10.13 £9.73 £9.72 Quote	Min.: 1 Mult.: 1	ARM Microcontrollers - MCU	SMD/SMT	LQFP-64	ARM Cortex M3	32 bit	120 MHz	1 MB	128 kB	12 bit	51 I/O	- 40 C	+ 85 C	Tray
ARM Microcontrollers - MCU 32BIT ARM Cortex M3 Connectivity 512kB STM32F215ZET6 STMicroelectronics 1: £9.73 130In Stock	Mfr. Part No. STM32F215ZET6 Mouser Part No 511-STM32F215ZET6	STMicroelectronics	ARM Microcontrollers - MCU 32BIT ARM Cortex M3 Connectivity 512kB Learn More about STMicroelectronics stm32f2	Datasheet	130In Stock	£9.73 £8.28 £7.66 £7.65 £7.64	Min.: 1 Mult.: 1	ARM Microcontrollers - MCU	SMD/SMT	LQFP-144	ARM Cortex M3	32 bit	120 MHz	512 kB	128 kB	12 bit	114 I/O	- 40 C	+ 85 C	Tray
ARM Microcontrollers - MCU 32-Bit Arm Cortex M3 128kb LCD Ultralow STM32L152RBT6 STMicroelectronics 1: £7.37 5In Stock NRND	Mfr. Part No. STM32L152RBT6 Mouser Part No 511-STM32L152RBT6 NRND	STMicroelectronics	ARM Microcontrollers - MCU 32-Bit Arm Cortex M3 128kb LCD Ultralow Learn More about STMicroelectronics stm32l1	Datasheet	5In Stock	£7.37 £5.71 £5.05 £4.73 £4.13	Min.: 1 Mult.: 1	ARM Microcontrollers - MCU	SMD/SMT	LQFP-64	ARM Cortex M3	32 bit	32 MHz	128 kB	16 kB	12 bit	51 I/O	- 40 C	+ 85 C	Tray
ARM Microcontrollers - MCU 32BIT CORTEX M3 48PINS 16KB STM32F100C4T6B STMicroelectronics 1: £3.96 3,000Expected 18/01/2027	Mfr. Part No. STM32F100C4T6B Mouser Part No 511-STM32F100C4T6B	STMicroelectronics	ARM Microcontrollers - MCU 32BIT CORTEX M3 48PINS 16KB Learn More about STMicroelectronics stm32f1	Datasheet	3,000Expected 18/01/2027	£3.96 £2.92 £2.65 £2.44 View £2.24 £2.18 £2.14 £2.07	Min.: 1 Mult.: 1	ARM Microcontrollers - MCU	SMD/SMT	LQFP-48	ARM Cortex M3	32 bit	24 MHz	16 kB	4 kB	12 bit	37 I/O	- 40 C	+ 85 C	Tray
ARM Microcontrollers - MCU 32BIT CORTEX M3 64K Flash 8KB RAM STM32F100R8H6B STMicroelectronics 1: £5.43 3,836Expected 24/05/2027	Mfr. Part No. STM32F100R8H6B Mouser Part No 511-STM32F100R8H6B	STMicroelectronics	ARM Microcontrollers - MCU 32BIT CORTEX M3 64K Flash 8KB RAM Learn More about STMicroelectronics stm32f1	Datasheet	3,836Expected 24/05/2027	£5.43 £4.00 £3.72 £3.27 View £3.10 £2.78 £2.66 £2.59	Min.: 1 Mult.: 1	ARM Microcontrollers - MCU	SMD/SMT		ARM Cortex M3	32 bit	24 MHz	128 kB	8 kB	12 bit	51 I/O	- 40 C	+ 85 C	Tray
ARM Microcontrollers - MCU 32-Bit ARM Cortex 64 Kbyte Value Line STM32F100R8T6BTR STMicroelectronics 1: £4.81 687Expected 10/12/2026	Mfr. Part No. STM32F100R8T6BTR Mouser Part No 511-STM32F100R8T6BTR	STMicroelectronics	ARM Microcontrollers - MCU 32-Bit ARM Cortex 64 Kbyte Value Line Learn More about STMicroelectronics stm32f1	Datasheet	687Expected 10/12/2026	Cut Tape £4.81 £3.68 £3.30 £3.09 View Reel £2.73 £3.00 £2.74 £2.73 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	ARM Microcontrollers - MCU			ARM Cortex M3	32 bit						- 40 C	+ 85 C	Reel, Cut Tape, MouseReel
ARM Microcontrollers - MCU 32BIT Cortex M3 64KB 10KB RAM 1X12 ADC STM32F101C8T6 STMicroelectronics 1: £5.74 1,312Expected 20/09/2027	Mfr. Part No. STM32F101C8T6 Mouser Part No 511-STM32F101C8T6	STMicroelectronics	ARM Microcontrollers - MCU 32BIT Cortex M3 64KB 10KB RAM 1X12 ADC Learn More about STMicroelectronics stm32f1	Datasheet	1,312Expected 20/09/2027	£5.74 £4.22 £3.94 £3.46 View £3.28 £2.94 £2.88	Min.: 1 Mult.: 1	ARM Microcontrollers - MCU	SMD/SMT	LQFP-48	ARM Cortex M3	32 bit	36 MHz	64 kB	10 kB	12 bit	48 I/O	- 40 C	+ 85 C	Tray
ARM Microcontrollers - MCU 32BIT Cortex M3 Access Line STM32F101CBT6TR STMicroelectronics 1: £6.20 2,398Expected 20/09/2027	Mfr. Part No. STM32F101CBT6TR Mouser Part No 511-STM32F101CBT6TR	STMicroelectronics	ARM Microcontrollers - MCU 32BIT Cortex M3 Access Line Learn More about STMicroelectronics stm32f1	Datasheet	2,398Expected 20/09/2027	Cut Tape £6.20 £4.32 £4.13 £3.58 View Reel £3.09 £3.42 £3.27 £3.09 £3.09 MouseReel Available	Min.: 1 Mult.: 1 : 2,400	ARM Microcontrollers - MCU	SMD/SMT	LQFP-48	ARM Cortex M3	32 bit	36 MHz	128 kB	16 kB	12 bit	37 I/O	- 40 C	+ 85 C	Reel, Cut Tape, MouseReel
ARM Microcontrollers - MCU 32BIT Cortex M3 High-density access STM32F101RCT6TR STMicroelectronics 1: £7.09 1,998Expected 07/04/2027	Mfr. Part No. STM32F101RCT6TR Mouser Part No 511-STM32F101RCT6TR	STMicroelectronics	ARM Microcontrollers - MCU 32BIT Cortex M3 High-density access Learn More about STMicroelectronics stm32f1	Datasheet	1,998Expected 07/04/2027	Cut Tape £7.09 £5.45 £4.85 £4.56 View Reel £4.05 £4.45 £4.13 £4.05 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	ARM Microcontrollers - MCU	SMD/SMT	LQFP-64	ARM Cortex M3	32 bit	36 MHz	256 kB	32 kB	12 bit	51 I/O	- 40 C	+ 85 C	Reel, Cut Tape, MouseReel
ARM Microcontrollers - MCU 32BIT Cortex M3 H/D ACCESS USB MCU STM32F101VCT6 STMicroelectronics 1: £7.63 2,157On Order	Mfr. Part No. STM32F101VCT6 Mouser Part No 511-STM32F101VCT6	STMicroelectronics	ARM Microcontrollers - MCU 32BIT Cortex M3 H/D ACCESS USB MCU Learn More about STMicroelectronics stm32f1	Datasheet	2,157On Order On Order Ship Dates Mfr. No: STM32F101VCT6 Stock: 0 On Order: 1,617 Expected 27/11/2026 540 Expected 30/08/2027 Factory Lead Time: 52 Weeks	£7.63 £5.51 £5.05 £4.96 £4.69	Min.: 1 Mult.: 1	ARM Microcontrollers - MCU	SMD/SMT	LQFP-100	ARM Cortex M3	32 bit	36 MHz	256 kB	32 kB	12 bit	80 I/O	- 40 C	+ 85 C	Tray
ARM Microcontrollers - MCU ARM 32Bit Access MCU 100-Pin 256kB Flash STM32F101VCT6TR STMicroelectronics 1: £7.63 999Expected 18/10/2027	Mfr. Part No. STM32F101VCT6TR Mouser Part No 511-STM32F101VCT6TR	STMicroelectronics	ARM Microcontrollers - MCU ARM 32Bit Access MCU 100-Pin 256kB Flash Learn More about STMicroelectronics stm32f1	Datasheet	999Expected 18/10/2027	Cut Tape £7.63 £5.90 £5.23 £5.02 £4.40 Reel £4.30 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	ARM Microcontrollers - MCU	SMD/SMT	LQFP-100	ARM Cortex M3	32 bit	36 MHz	256 kB	32 kB	12 bit	80 I/O	- 40 C	+ 85 C	Reel, Cut Tape, MouseReel
ARM Microcontrollers - MCU XL-Density Access Line 32-Bit 768 Kb STM32F101VFT6 STMicroelectronics 1: £10.25 540Expected 05/04/2027	Mfr. Part No. STM32F101VFT6 Mouser Part No 511-STM32F101VFT6	STMicroelectronics	ARM Microcontrollers - MCU XL-Density Access Line 32-Bit 768 Kb Learn More about STMicroelectronics stm32f1	Datasheet	540Expected 05/04/2027	£10.25 £7.73 £7.12 £6.89 £6.63	Min.: 1 Mult.: 1	ARM Microcontrollers - MCU	SMD/SMT	LQFP-100	ARM Cortex M3	32 bit	36 MHz	768 kB	80 kB	12 bit	112 I/O	- 40 C	+ 85 C	Tray
ARM Microcontrollers - MCU 32-Bit ARM Cortex 128kb Performance STM32F103CBU6 STMicroelectronics 1: £6.13 3,112On Order	Mfr. Part No. STM32F103CBU6 Mouser Part No 511-STM32F103CBU6	STMicroelectronics	ARM Microcontrollers - MCU 32-Bit ARM Cortex 128kb Performance Learn More about STMicroelectronics stm32f1	Datasheet	3,112On Order On Order Ship Dates Mfr. No: STM32F103CBU6 Stock: 0 On Order: 1,552 Expected 05/11/2026 1,560 Expected 10/05/2027 Factory Lead Time: 40 Weeks	£6.13 £4.68 £4.19 £3.95 View £3.76 £3.66	Min.: 1 Mult.: 1	ARM Microcontrollers - MCU	SMD/SMT	UQFN-48	ARM Cortex M3	32 bit	72 MHz	128 kB	20 kB	12 bit	37 I/O	- 40 C	+ 85 C	Tray
ARM Microcontrollers - MCU Mainstream Performance line, Arm Cortex-M3 MCU 256 Kbytes of Flash 72 MHz CPU, m STM32F103RCT7TR STMicroelectronics 1: £8.35 1,000On Order	Mfr. Part No. STM32F103RCT7TR Mouser Part No 511-STM32F103RCT7TR	STMicroelectronics	ARM Microcontrollers - MCU Mainstream Performance line, Arm Cortex-M3 MCU 256 Kbytes of Flash 72 MHz CPU, m Learn More about STMicroelectronics stm32f1	Datasheet	1,000On Order	Cut Tape £8.35 £6.50 £6.01 £5.45 View Reel £4.85 £5.34 £4.97 £4.85 MouseReel Available	Min.: 1 Mult.: 1 : 1,000	ARM Microcontrollers - MCU	SMD/SMT	LQFP-64	ARM Cortex M3	32 bit	72 MHz	256 kB	48 kB	12 bit	51 I/O	- 40 C	+ 105 C	Reel, Cut Tape, MouseReel
ARM Microcontrollers - MCU 32BIT Cortex M3 H/D 257 to 512 USB/CAN STM32F103RDT6 STMicroelectronics 1: £7.98 1,883On Order	Mfr. Part No. STM32F103RDT6 Mouser Part No 511-STM32F103RDT6	STMicroelectronics	ARM Microcontrollers - MCU 32BIT Cortex M3 H/D 257 to 512 USB/CAN Learn More about STMicroelectronics stm32f1	Datasheet	1,883On Order On Order Ship Dates Mfr. No: STM32F103RDT6 Stock: 0 On Order: 923 Expected 07/04/2027 960 TBD Factory Lead Time: 52 Weeks	£7.98 £6.30 £5.87 £5.33 £5.24	Min.: 1 Mult.: 1	ARM Microcontrollers - MCU	SMD/SMT	LQFP-64	ARM Cortex M3	32 bit	72 MHz	384 kB	64 kB	12 bit	51 I/O	- 40 C	+ 85 C	Tray
ARM Microcontrollers - MCU 32-Bit ARM Cortex XL Density 1Mb Flash STM32F103RGT7 STMicroelectronics 1: £12.38 958Expected 29/03/2027	Mfr. Part No. STM32F103RGT7 Mouser Part No 511-STM32F103RGT7	STMicroelectronics	ARM Microcontrollers - MCU 32-Bit ARM Cortex XL Density 1Mb Flash Learn More about STMicroelectronics stm32f1	Datasheet	958Expected 29/03/2027	£12.38 £9.71 £8.98 £8.29 View £8.04 £7.73	Min.: 1 Mult.: 1	ARM Microcontrollers - MCU	SMD/SMT	LQFP-64	ARM Cortex M3	32 bit	72 MHz	1 MB	96 kB	12 bit	112 I/O	- 40 C	+ 105 C	Tray
ARM Microcontrollers - MCU 32BIT Cortex M3 Performance LINE STM32F103T8U7 STMicroelectronics 1: £6.18 2,922Expected 14/06/2027	Mfr. Part No. STM32F103T8U7 Mouser Part No 511-STM32F103T8U7	STMicroelectronics	ARM Microcontrollers - MCU 32BIT Cortex M3 Performance LINE Learn More about STMicroelectronics stm32f1	Datasheet	2,922Expected 14/06/2027	£6.18 £4.76 £4.44 £4.02 View £3.72 £3.62	Min.: 1 Mult.: 1	ARM Microcontrollers - MCU	SMD/SMT	UFQFPN-36	ARM Cortex M3	32 bit	72 MHz	64 kB	20 kB	12 bit	26 I/O	- 40 C	+ 105 C	Tray
ARM Microcontrollers - MCU 32BIT Cortex M3 H/D 261 to 512 USB/CAN STM32F103ZCT6 STMicroelectronics 1: £9.45 1,282On Order	Mfr. Part No. STM32F103ZCT6 Mouser Part No 511-STM32F103ZCT6	STMicroelectronics	ARM Microcontrollers - MCU 32BIT Cortex M3 H/D 261 to 512 USB/CAN Learn More about STMicroelectronics stm32f1	Datasheet	1,282On Order On Order Ship Dates Mfr. No: STM32F103ZCT6 Stock: 0 On Order: 562 Expected 08/11/2027 720 TBD Factory Lead Time: 52 Weeks	£9.45 £7.61 £6.98 £6.70 View £6.53 £5.95	Min.: 1 Mult.: 1	ARM Microcontrollers - MCU	SMD/SMT	LQFP-144	ARM Cortex M3	32 bit	72 MHz	256 kB	64 kB	12 bit	112 I/O	- 40 C	+ 85 C	Tray
ARM Microcontrollers - MCU 32BIT Cortex M3 H/D 262 to 512 USB/CAN STM32F103ZDT6 STMicroelectronics 1: £10.43 358On Order	Mfr. Part No. STM32F103ZDT6 Mouser Part No 511-STM32F103ZDT6	STMicroelectronics	ARM Microcontrollers - MCU 32BIT Cortex M3 H/D 262 to 512 USB/CAN Learn More about STMicroelectronics stm32f1	Datasheet	358On Order	£10.43 £8.19 £7.21 £7.09 View £6.51 £6.41	Min.: 1 Mult.: 1	ARM Microcontrollers - MCU	SMD/SMT	LQFP-144	ARM Cortex M3	32 bit	72 MHz	384 kB	64 kB	12 bit	112 I/O	- 40 C	+ 85 C	Tray
ARM Microcontrollers - MCU 32-Bit Cortex 64Kb Connectivity Line STM32F105RCT7 STMicroelectronics 1: £8.53 897On Order	Mfr. Part No. STM32F105RCT7 Mouser Part No 511-STM32F105RCT7	STMicroelectronics	ARM Microcontrollers - MCU 32-Bit Cortex 64Kb Connectivity Line Learn More about STMicroelectronics stm32f1	Datasheet	897On Order	£8.53 £6.63 £6.33 £5.50 View £5.19 £4.90	Min.: 1 Mult.: 1	ARM Microcontrollers - MCU	SMD/SMT	LQFP-64	ARM Cortex M3	32 bit	72 MHz	256 kB	64 kB	12 bit	51 I/O	- 40 C	+ 105 C	Tray
ARM Microcontrollers - MCU 32BIT Cortex 64/25 CONNECTIVITY LINE M3 STM32F107VBT6 STMicroelectronics 1: £7.49 1,030Expected 08/12/2026	Mfr. Part No. STM32F107VBT6 Mouser Part No 511-STM32F107VBT6	STMicroelectronics	ARM Microcontrollers - MCU 32BIT Cortex 64/25 CONNECTIVITY LINE M3 Learn More about STMicroelectronics STM32F107	Datasheet	1,030Expected 08/12/2026	£7.49 £6.01 £5.77 £5.58 £5.03	Min.: 1 Mult.: 1	ARM Microcontrollers - MCU	SMD/SMT	LQFP-100	ARM Cortex M3	32 bit	72 MHz	128 kB	64 kB	12 bit	80 I/O	- 40 C	+ 85 C	Tray
ARM Microcontrollers - MCU 32BIT CORTEX M3 256K Flash 6KB RAM STM32F107VCH6 STMicroelectronics 1: £8.59 2,008Expected 13/01/2027	Mfr. Part No. STM32F107VCH6 Mouser Part No 511-STM32F107VCH6	STMicroelectronics	ARM Microcontrollers - MCU 32BIT CORTEX M3 256K Flash 6KB RAM Learn More about STMicroelectronics STM32F107	Datasheet	2,008Expected 13/01/2027	£8.59 £6.96 £6.47 £5.94	Min.: 1 Mult.: 1	ARM Microcontrollers - MCU	SMD/SMT	BGA-100	ARM Cortex M3	32 bit	72 MHz	256 kB	64 kB	12 bit	80 I/O	- 40 C	+ 85 C	Tray
ARM Microcontrollers - MCU 32BIT ARM Cortex M3 Connectivity 768kB STM32F205ZFT6 STMicroelectronics 1: £13.48 347Expected 22/02/2027	Mfr. Part No. STM32F205ZFT6 Mouser Part No 511-STM32F205ZFT6	STMicroelectronics	ARM Microcontrollers - MCU 32BIT ARM Cortex M3 Connectivity 768kB Learn More about STMicroelectronics stm32f2	Datasheet	347Expected 22/02/2027	£13.48 £9.65 £9.45 £9.12	Min.: 1 Mult.: 1	ARM Microcontrollers - MCU	SMD/SMT	LQFP-144	ARM Cortex M3	32 bit	120 MHz	768 kB	128 kB	12 bit	114 I/O	- 40 C	+ 85 C	Tray