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. 887-7268
Mfr. Part No.PIC18F4520-I/P
BrandMicrochip
MYR28.842
Each (In a Tube of 10)
units
PIC18F PDIP Through Hole 40 PIC 8bit 32 kB, 256 B 40MHz 1.536 kB - 2 13 1 4.2 to 5.5 V
RS Stock No. 755-9414
Mfr. Part No.PIC10F322-I/P
BrandMicrochip
MYR3.204
Each (In a Pack of 5)
units
PIC10F PDIP Through Hole 8 PIC 8bit 512 words 16MHz 64 B - 2 3 - 2.3 → 5.5 V
RS Stock No. 876-6717
Mfr. Part No.PIC16F887-I/PT
BrandMicrochip
MYR12.736
Each (In a Tray of 160)
units
PIC16F TQFP Surface Mount 44 PIC 8bit 8192 words 20MHz 368 B - 2 14 1 2 → 5.5 V
RS Stock No. 145-8997
Mfr. Part No.PIC10F322-I/P
BrandMicrochip
MYR2.948
Each (In a Tube of 60)
units
PIC10F PDIP Through Hole 8 PIC 8bit 512 words 16MHz 64 B - 2 3 - 2.3 → 5.5 V
RS Stock No. 814-3076
Mfr. Part No.PIC12F1571-I/SN
BrandMicrochip
MYR2.667
Each (In a Pack of 10)
units
PIC12F SOIC Surface Mount 8 PIC 8bit 1 kwords 16MHz 128 B 1 3 4 - 5.5 V
RS Stock No. 402-279
Mfr. Part No.STM32F103C8T6
MYR25.24
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
RS Stock No. 102-3545
Mfr. Part No.STM32F103C8T6
MYR17.618
Each (In a Tray of 250)
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
RS Stock No. 165-2032
Mfr. Part No.PIC12F1571-I/SN
BrandMicrochip
MYR2.416
Each (In a Tube of 100)
units
PIC12F SOIC Surface Mount 8 PIC 8bit 1 kwords 16MHz 128 B 1 3 4 - 5.5 V
RS Stock No. 623-0819
Mfr. Part No.PIC18F4520-I/P
BrandMicrochip
MYR29.77
Each
units
PIC18F PDIP Through Hole 40 PIC 8bit 32 kB, 256 B 40MHz 1.536 kB - 2 13 1 4.2 to 5.5 V
RS Stock No. 399-420
Mfr. Part No.PIC16F887-I/PT
BrandMicrochip
MYR14.298
Each (In a Pack of 5)
units
PIC16F TQFP Surface Mount 44 PIC 8bit 8192 words 20MHz 368 B - 2 14 1 2 → 5.5 V
RS Stock No. 539-0291
Mfr. Part No.MC68HC705C8ACFNE
BrandNXP
MYR91.95
Each
units
M68HC05 PLCC Surface Mount 44 HC05 8bit 8 kB 2.1MHz 304 B - - - 1 3 → 5.5 V
RS Stock No. 829-4644
Mfr. Part No.STM32F030K6T6
MYR5.87
Each (In a Pack of 10)
units
STM32F LQFP Surface Mount 32 ARM Cortex 32bit 32 kB 48MHz 4 kB - - 12 1 2.4 → 3.6 V
RS Stock No. 919-6260
Mfr. Part No.STM32F030F4P6
MYR5.601
Each (In a Tube of 74)
units
STM32F TSSOP Surface Mount 20 ARM Cortex M0 32bit 16 kB 48MHz 4 kB - 1 11 1 3.6 V
RS Stock No. 866-8143
Mfr. Part No.PIC18F4520-I/PT
BrandMicrochip
MYR27.013
Each (In a Tray of 160)
units
PIC18F TQFP Surface Mount 44 PIC 8bit 32 kB, 256 B 40MHz 1.536 kB - - 13 1 4.2 → 5.5 V
RS Stock No. 165-5557
Mfr. Part No.STM32F030K6T6TR
MYR3.15
Each (On a Reel of 2400)
units
STM32F LQFP Surface Mount 32 ARM Cortex 32bit 32 kB 48MHz 4 kB - - 12 1 2.4 → 3.6 V
RS Stock No. 168-8744
Mfr. Part No.STM32F030F4P6TR
MYR2.625
Each (On a Reel of 2500)
units
STM32F TSSOP Surface Mount 20 ARM Cortex M0 32bit 16 kB 48MHz 4 kB - - 11 1 2.4 → 3.6 V
RS Stock No. 666-9753
Mfr. Part No.PIC16F1936-I/SS
BrandMicrochip
MYR8.075
Each (In a Pack of 2)
units
PIC16F SSOP Surface Mount 28 PIC 8bit 256 B, 8192 x 14 words 32MHz 512 B - 5 11 1 1.8 → 5.5 V
RS Stock No. 912-6693
Mfr. Part No.PIC16F1936-I/SS
BrandMicrochip
MYR7.892
Each (In a Tube of 47)
units
PIC16F SSOP Surface Mount 28 PIC 8bit 256 B, 8192 x 14 words 32MHz 512 B - 5 11 1 1.8 → 5.5 V
RS Stock No. 829-7151
Mfr. Part No.STM32F030F4P6TR
MYR4.862
Each (In a Pack of 10)
units
STM32F TSSOP Surface Mount 20 ARM Cortex M0 32bit 16 kB 48MHz 4 kB - - 11 1 2.4 → 3.6 V
RS Stock No. 860-7508
Mfr. Part No.STM32F030K6T6TR
MYR6.878
Each (In a Pack of 5)
units
STM32F LQFP Surface Mount 32 ARM Cortex M0 32bit 32 kB 48MHz 4 kB - 1 12 1 2.4 → 3.6 V