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. 623-0819
Mfr. Part No.PIC18F4520-I/P
BrandMicrochip
SGD7.69
Each
units
PIC18F PDIP Through Hole 40 PIC 8bit 32 kB, 256 B 40MHz 1.536 kB 0 2 13 1 4.2 to 5.5 V
RS Stock No. 823-4428
Mfr. Part No.PIC18F8722-E/PT
BrandMicrochip
SGD18.23
Each
units
PIC18F TQFP Surface Mount 80 PIC 8bit 128 kB 40MHz 3.936 kB 0 3 16 2 2 → 5.5 V
RS Stock No. 165-5271
Mfr. Part No.STM8L052C6T6
SGD1.392
Each (In a Tray of 250)
units
STM8L LQFP Surface Mount 48 STM8 8bit 32 kB 32MHz 2 kB 0 1 25 1 1.8 → 3.6 V
RS Stock No. 681-1171
Mfr. Part No.PIC18F4620-I/PT
BrandMicrochip
SGD9.87
Each
units
PIC18F TQFP Surface Mount 44 PIC 8bit 1.024 kB, 64 kB 40MHz 3.986 kB 0 2 13 1 4.2 → 5.5 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 640 B, 8 kB 16MHz 1 kB 0 1 4 1 2.95 → 5.5 V
RS Stock No. 144-9117
Mfr. Part No.PIC16C54C-04/P
BrandMicrochip
SGD2.176
Each (In a Tube of 25)
units
PIC16C PDIP Through Hole 18 PIC 8bit 512 x 12 words 4MHz 25 B 0 - - 0 2.5 → 5.5 V
RS Stock No. 165-2051
Mfr. Part No.PIC16F876A-I/SS
BrandMicrochip
SGD6.67
Each (In a Tube of 47)
units
PIC16F SSOP Surface Mount 28 PIC 8bit 14 kB 20MHz 368 B 0 2 5 1 2 → 5.5 V
RS Stock No. 877-2927
Mfr. Part No.STM8L052C6T6
SGD2.126
Each (In a Pack of 5)
units
STM8L LQFP Surface Mount 48 STM8 8bit 32 kB 32MHz 2 kB 0 1 25 1 1.8 → 3.6 V
RS Stock No. 629-1022
Mfr. Part No.ADUC7026BSTZ62
SGD29.04
Each
units
ADuC7 LQFP Surface Mount 80 ARM7TDMI 16 bit, 32bit 62 kB 44MHz 8 kB 0 1 12 1 2.7 → 3.6 V
RS Stock No. 882-0271
Mfr. Part No.STM32F746BGT6
SGD19.85
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. 165-2227
Mfr. Part No.PIC18F8722-E/PT
BrandMicrochip
SGD17.44
Each (In a Tray of 119)
units
- - - - - - - - 3.936 kB - - - - -
RS Stock No. 165-3457
Mfr. Part No.PIC16F1826-I/P
BrandMicrochip
SGD1.833
Each (In a Tube of 25)
units
PIC16F PDIP Through Hole 18 PIC 8bit 256 B, 2K x 14 words 32MHz 256 B 0 1 12 1 1.8 → 5.5 V
RS Stock No. 698-8943
Mfr. Part No.PIC16F1826-I/P
BrandMicrochip
SGD2.40
Each
units
PIC16F PDIP Through Hole 18 PIC 8bit 2K x 14 words, 256 B 32MHz 256 B 0 1 12 1 1.8 to 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 0 1 25 1 3.6 V
RS Stock No. 799-0288
Mfr. Part No.PIC12LF1840T39A-I/ST
BrandMicrochip
SGD2.693
Each (In a Pack of 4)
units
PIC12F TSSOP Surface Mount 14 PIC 8bit 4 kwords 32MHz 256 B 1 1 4 1 1.8 → 3.6 V
RS Stock No. 126-2156
Mfr. Part No.PIC18F24K40-I/SP
BrandMicrochip
SGD2.27
Each (In a Pack of 5)
units
PIC18F SPDIP Surface Mount 28 PIC18 8bit 16 kB 64MHz 1.024 kB 0 1 24 - 2.3 → 5.5 V
RS Stock No. 145-9607
Mfr. Part No.STM32F103RCT6
SGD6.488
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. 467-1347
Mfr. Part No.PIC16F73-I/SP
BrandMicrochip
SGD5.58
Each
units
PIC16F SPDIP Through Hole 28 PIC 8bit 4K x 14 words 20MHz 192 B 0 2 5 1 4 → 5.5 V
RS Stock No. 714-1079
Mfr. Part No.STM32F103RCT6
SGD8.66
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. 829-0131
Mfr. Part No.PIC24FJ128GB202-I/SP
BrandMicrochip
SGD5.48
Each (In a Pack of 2)
units
PIC24FJ SPDIP Through Hole 28 PIC 16bit 128 kB 32MHz 8 kB 1 1 9 3 2 to 3.6 V