Microcontrollers

Microcontrollers, also referred to as MCUs (microcontroller units), are embedded semiconductor devices used in circuit board design. They are essentially a computer within an integrated circuit (IC). Microcontrollers are mostly used in single-function embedded applications, unlike microprocessors which are designed for general-purpose work in Personal Computers, Tablets and Smartphones. Microcontrollers are limited in their clock speed compared to microprocessors by the relative slowness of their non-volatile Flash program memory. Learn more in our microcontrollers guide.

What are Microcontrollers made up of?

Microcontrollers contain single or multiple processors, plus memory and I/O peripherals. These peripherals include timers, ADCs (analogue-to-digital converters) and DACs (digital-to-analogue converters).

What does 8-bit mean?

Microcontrollers have a data bus width which describes the amount of data the MCU can process at a time. For example, an 8-bit microcontroller can process 8 bits at one time. Popular data bus widths include 8-bit, 16-bit and 32-bit MCUs.

What packages are available for Microcontrollers?

MCUs come in standard chip packages with various pin counts. Package types include:

  • LQFP
  • PDIP
  • QFN
  • SOIC
  • SSOP
  • TQFP
  • TSSOP

What are ARM processor cores?

Microcontrollers often contain an ARM microprocessor core. ARM represents an architecture developed by ARM Holdings, which is used by other companies to manufacture microprocessors and other devices such as System-on-Chip (SoCs).

  • Cortex-M0
  • Cortex-M0+
  • Cortex-M1
  • Cortex-M3
  • Cortex-M4
  • Cortex-M7
  • Cortex-M23
  • Cortex-M33
  • Cortex-M35P

Where are microcontrollers used?

MCUs can be found in many technologies and any electronic device containing a sensor, a display, a user interface and a programmable output control or actuator is likely to feature an MCU. They can be found in the following areas:

  • Computers
  • Automotive
  • Robotics
  • Automation
  • Medical equipment
  • Home appliances
  • IoT devices

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Description Price Family Name Package Type Mounting Type Pin Count Device Core Data Bus Width Program Memory Size Maximum Frequency RAM Size USB Channels Number of PWM Units ADC Channels Number of SPI Channels Typical Operating Supply Voltage
RS Stock No. 165-6778
Mfr. Part No.STM32F405RGT6V
kr 106,146
Each (In a Tray of 160)
Units
STM32F LQFP Surface Mount 64 ARM Cortex M4 32bit 1.024 MB 168MHz 192 + 4 kB 1 x OTG 1 x 16 bit - 3 1.8 → 3.6 V
RS Stock No. 810-7673
Mfr. Part No.STM32F405RGT6V
kr 111,87
Each
Units
STM32F LQFP Surface Mount 64 ARM Cortex M4 32bit 1.024 MB 168MHz 192 + 4 kB 1 x OTG 1 x 16 bit - 3 1.8 → 3.6 V
RS Stock No. 110-6621
Mfr. Part No.STM32F446RET6
kr 99,58
Each
Units
STM32 LQFP Surface Mount 64 ARM Cortex M4 32bit 512 kB 180MHz 128 kB 2 - - - 1.8 → 3.6 V
RS Stock No. 166-1153
Mfr. Part No.STM32F446RET6
kr 74,576
Each (In a Tray of 160)
Units
STM32 LQFP Surface Mount 64 ARM Cortex M4 32bit 512 kB 180MHz 128 kB 2 - - - 1.8 → 3.6 V
RS Stock No. 703-7661
Mfr. Part No.PIC18F27J53-I/SP
BrandMicrochip
kr 44,25
Each
Units
PIC18F SPDIP Through Hole 28 PIC 8bit 128 kB 48MHz 3.8 kB 0 10 x 16 bit - 2 2.15 → 3.6 V
RS Stock No. 772-4867
Mfr. Part No.STM32F373CCT6
kr 73,06
Each
Units
STM32F LQFP Surface Mount 48 ARM Cortex M4F 32bit 256 kB 72MHz 32 kB 1 11 x 16/32 bit - 3 2 → 3.6 V
RS Stock No. 165-3455
Mfr. Part No.PIC18F27J53-I/SP
BrandMicrochip
kr 41,435
Each (In a Tube of 15)
Units
PIC18F SPDIP Through Hole 28 PIC 8bit 128 kB 48MHz 3.8 kB 0 10 x 16 bit - 2 2.15 → 3.6 V
RS Stock No. 920-6446
Mfr. Part No.STM32F373CCT6
kr 52,203
Each (In a Tray of 250)
Units
STM32F LQFP Surface Mount 48 ARM Cortex M4F 32bit 256 kB 72MHz 32 kB 1 11 x 16/32 bit - 3 2 → 3.6 V
RS Stock No. 165-8169
Mfr. Part No.STM32F469NIH6
kr 153,874
Each (In a Tray of 160)
Units
STM32 BGA Surface Mount 216 ARM Cortex M4 32bit 2.048 MB 180MHz 384 + 4 kB 2 - - - 1.7 → 3.6 V
RS Stock No. 660-0766
Mfr. Part No.Z84C4206PEG
BrandZilog
kr 102,30
Each
Units
Z80 PDIP Through Hole 40 Z8 8bit - 6MHz - 0 - - 1 4.5 → 5.5 V
RS Stock No. 917-3400
Mfr. Part No.STM32F469NIH6
kr 168,08
Each
Units
STM32 BGA Surface Mount 216 ARM Cortex M4 32bit 2.048 MB 180MHz 384 + 4 kB 2 - - - 1.7 → 3.6 V
RS Stock No. 146-1236
Mfr. Part No.Z84C4206PEG
BrandZilog
kr 93,842
Each (In a Tube of 10)
Units
Z80 PDIP Through Hole 40 Z8 8bit - 6MHz - 0 - - 1 4.5 → 5.5 V
RS Stock No. 723-8895
Mfr. Part No.STM32F100RBT6B
kr 49,90
Each
Units
STM32F LQFP Surface Mount 64 ARM Cortex M3 32bit 128 kB 24MHz 8 kB 0 7 x 16 bit - 2 2 → 3.6 V
RS Stock No. 905-5210
Mfr. Part No.PIC32MZ1024EFG064-I/PT
BrandMicrochip
kr 107,19
Each
Units
PIC32MZ TQFP Surface Mount 64 MIPS® MicroAptiv™ 32bit 1024 (Flash) kB, 160 (Boot Flash) kB 200MHz 512 kB 3 1 x 16/32 bit - 4 3.3 V
RS Stock No. 168-7330
Mfr. Part No.STM32F100RBT6B
kr 31,757
Each (In a Tray of 160)
Units
STM32F LQFP Surface Mount 64 ARM Cortex M3 32bit 128 kB 24MHz 8 kB 0 7 x 16 bit - 2 2 → 3.6 V
RS Stock No. 792-6013
Mfr. Part No.STM32F405RGT6TR
kr 122,74
Each
Units
STM32F LQFP Surface Mount 64 ARM Cortex M4 32bit 1.024 MB 168MHz 192 kB 2 2 x 16 bit - 3 3.6 V
RS Stock No. 746-8226
Mfr. Part No.STM32F407VGT6
kr 132,63
Each
Units
STM32F LQFP Surface Mount 100 ARM Cortex M4F 32bit 1.024 MB 168MHz 4 kB, 192 kB 1 x Device, 1 x Host, 1 x OTG 1 x 16 bit - 3 1.8 → 3.6 V
RS Stock No. 168-7326
Mfr. Part No.STM32F100C8T6B
kr 21,663
Each (In a Tray of 250)
Units
STM32F LQFP Surface Mount 48 ARM Cortex M3 32bit 64 kB 24MHz 8 kB 0 7 x 16 bit - 2 2 → 3.6 V
RS Stock No. 746-8217
Mfr. Part No.STM32F405RGT6
kr 122,74
Each
Units
STM32F LQFP Surface Mount 64 ARM Cortex M4F 32bit 1.024 MB 168MHz 4 kB, 192 kB 1 x Device, 1 x Host, 1 x OTG 1 x 16 bit - 3 1.8 → 3.6 V
RS Stock No. 920-6456
Mfr. Part No.STM32F405RGT6
kr 95,333
Each (In a Tray of 160)
Units
STM32F LQFP Surface Mount 64 ARM Cortex M4F 32bit 1.024 MB 168MHz 4 kB, 192 kB 1 x Device, 1 x Host, 1 x OTG 1 x 16 bit - 3 1.8 → 3.6 V