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.

What are they made up of?

Microcontrollers contain single or multiple processors (sometimes referred to as CPUs), 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 there?

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?

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

...
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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. 168-7326
Mfr. Part No.STM32F100C8T6B
SGD3.591
Each (In a Tray of 250)
units
STM32F LQFP Surface Mount 48 ARM Cortex M3 32bit 64 kB 24MHz 8 kB - 7 10 2 2 → 3.6 V
RS Stock No. 723-8873
Mfr. Part No.STM32F100C8T6B
SGD5.99
Each
units
STM32F LQFP Surface Mount 48 ARM Cortex M3 32bit 64 kB 24MHz 8 kB - 7 10 2 2 → 3.6 V
RS Stock No. 877-2927
Mfr. Part No.STM8L052C6T6
SGD2.656
Each (In a Pack of 5)
units
STM8L LQFP Surface Mount 48 STM8 8bit 32 kB 32MHz 2 kB - 1 25 1 1.8 → 3.6 V
RS Stock No. 882-0271
Mfr. Part No.STM32F746BGT6
SGD22.07
Each
units
STM32F LQFP Surface Mount 208 ARM Cortex M7 32bit 1.024 MB 216MHz 340 kB 2 2 24 - 1.7 → 3.6 V
RS Stock No. 145-9607
Mfr. Part No.STM32F103RCT6
SGD8.734
Each (In a Tray of 160)
units
STM32F LQFP Surface Mount 64 ARM Cortex M3 32bit 256 kB 72MHz 48 kB 1 x Device 2 16 3 2 → 3.6 V
RS Stock No. 145-8809
Mfr. Part No.STM8L052C6T6TR
SGD1.27
Each (On a Reel of 2400)
units
STM8L LQFP Surface Mount 48 STM8 8bit 32 kB 16MHz 2 kB - 1 25 1 3.6 V
RS Stock No. 714-1079
Mfr. Part No.STM32F103RCT6
SGD10.04
Each
units
STM32F LQFP Surface Mount 64 ARM Cortex M3 32bit 256 kB 72MHz 48 kB 1 x Device 2 16 3 2 → 3.6 V
RS Stock No. 165-5354
Mfr. Part No.STM32F746BGT6
SGD16.307
Each (In a Tray of 360)
units
STM32F LQFP Surface Mount 208 ARM Cortex M7 32bit 1.024 MB 216MHz 340 kB 2 2 24 - 1.7 → 3.6 V
RS Stock No. 165-5271
Mfr. Part No.STM8L052C6T6
SGD1.806
Each (In a Tray of 250)
units
STM8L LQFP Surface Mount 48 STM8 8bit 32 kB 32MHz 2 kB - 1 25 1 1.8 → 3.6 V
RS Stock No. 724-9915
Mfr. Part No.STM8S103K3T6C
SGD2.44
Each (In a Pack of 2)
units
STM8S LQFP Surface Mount 32 STM8 8bit 8 kB, 640 B 16MHz 1 kB - 1 4 1 2.95 → 5.5 V
RS Stock No. 791-7775
Mfr. Part No.STM8L052C6T6TR
SGD2.58
Each (On a Tape of 5)
units
STM8L LQFP Surface Mount 48 STM8 8bit 32 kB 16MHz 2 kB - 1 25 1 3.6 V
RS Stock No. 168-7368
Mfr. Part No.STM8S103K3T6C
SGD1.843
Each (In a Tray of 250)
units
STM8S LQFP Surface Mount 32 STM8 8bit 8 kB, 640 B 16MHz 1 kB - 1 4 1 2.95 → 5.5 V
RS Stock No. 792-5928
Mfr. Part No.STM32F030C6T6
SGD2.488
Each (In a Pack of 5)
units
STM32F LQFP Surface Mount 48 ARM Cortex M0 32bit 32 kB 48MHz 4 kB - 1 12 1 3.6 V
RS Stock No. 724-9902
Mfr. Part No.STM8S103F3P6
SGD2.14
Each (In a Pack of 2)
units
STM8S TSSOP Surface Mount 20 STM8 8bit 8 kB, 640 B 16MHz 1 kB - 1 5 1 2.95 → 5.5 V
RS Stock No. 724-9886
Mfr. Part No.STM8L152C6T6
SGD3.72
Each
units
STM8L LQFP Surface Mount 48 STM8 8bit 1 kB, 32 kB 16MHz 2 kB - 1 25 1 1.8 → 3.6 V
RS Stock No. 168-7367
Mfr. Part No.STM8S103F3P6
SGD2.022
Each (In a Tube of 74)
units
STM8S TSSOP Surface Mount 20 STM8 8bit 8 kB, 640 B 16MHz 1 kB - 1 5 1 2.95 → 5.5 V
RS Stock No. 168-7363
Mfr. Part No.STM8L152C6T6
SGD2.28
Each (In a Tray of 250)
units
STM8L LQFP Surface Mount 48 STM8 8bit 1 kB, 32 kB 16MHz 2 kB - 1 25 1 1.8 → 3.6 V
RS Stock No. 919-6264
Mfr. Part No.STM32F030C6T6
SGD1.691
Each (In a Tray of 250)
units
STM32F LQFP Surface Mount 48 ARM Cortex M0 32bit 32 kB 48MHz 4 kB - 1 12 1 3.6 V
RS Stock No. 746-8214
Mfr. Part No.STM32F407IGT6
SGD20.01
Each
units
STM32F LQFP Surface Mount 176 ARM Cortex M4F 32bit 1.024 MB 168MHz 4 kB, 192 kB 1 x Device, 1 x Host, 1 x OTG 1 24 3 1.8 → 3.6 V
RS Stock No. 402-279
Mfr. Part No.STM32F103C8T6
SGD9.14
Each
units
STM32F LQFP Surface Mount 48 ARM Cortex M3 32bit 64 kB 72MHz 20 kB 1 x Device 1 10 2 2 → 3.6 V