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. 103-8056
Mfr. Part No.LPC2138FBD64/01,15
BrandNXP
TWD447.70
Each (In a Tray of 160)
units
LPC21 LQFP Surface Mount 64 ARM7TDMI-S 16/32bit 512 kB 60MHz 32 kB - 1 8 2 3 3.6 V
RS Stock No. 165-4174
Mfr. Part No.PIC16F18313-I/P
BrandMicrochip
TWD26.50
Each (In a Tube of 60)
units
PIC16F PDIP Through Hole 8 PIC 8bit 3.5 kB 32MHz 256 B - 1 5 - 2.3 5.5 V
RS Stock No. 810-7641
Mfr. Part No.STM32F302CBT6
TWD161.00
Each (In a Pack of 2)
units
STM32F LQFP Surface Mount 48 ARM Cortex M4 32bit 128 kB 72MHz 32 kB 1 1 8 3 2 3.6 V
RS Stock No. 165-1997
Mfr. Part No.PIC16F1503-E/ST
BrandMicrochip
TWD28.30
Each (In a Tube of 96)
units
PIC16F TSSOP Surface Mount 14 PIC 8bit 3.5 kB 20MHz 128 B 1 4 8 1 2.3 5.5 V
RS Stock No. 823-4472
Mfr. Part No.PIC16F1503-E/ST
BrandMicrochip
TWD30.70
Each (In a Pack of 10)
units
PIC16F TSSOP Surface Mount 14 PIC 8bit 3.5 kB 20MHz 128 B 1 4 8 1 2.3 5.5 V
RS Stock No. 916-3734
Mfr. Part No.PIC16F18313-I/P
BrandMicrochip
TWD28.90
Each (In a Pack of 10)
units
PIC16F PDIP Through Hole 8 PIC 8bit 3.5 kB 32MHz 256 B - 1 5 - 2.3 5.5 V
RS Stock No. 402-279
Mfr. Part No.STM32F103C8T6
TWD201.00
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. 889-5238
Mfr. Part No.PIC12F1822-I/SN
BrandMicrochip
TWD29.00
Each (In a Tube of 100)
units
PIC12 SOIC Surface Mount 8 PIC 8bit 2K x 14 words, 256 B 32MHz 128 B - 1 4 1 1.8 5.5 V
RS Stock No. 625-8996
Mfr. Part No.Z84C3008PEG
BrandZilog
TWD187.00
Each
units
Z80 PDIP Through Hole 28 Z8 8bit - 8MHz - - - - - 4.5 5.5 V
RS Stock No. 165-6735
Mfr. Part No.STM32F302CBT6
TWD112.80
Each (In a Tray of 250)
units
STM32F LQFP Surface Mount 48 ARM Cortex M4 32bit 128 kB 72MHz 32 kB 1 1 8 3 2 3.6 V
RS Stock No. 786-4003
Mfr. Part No.PIC16F1455-I/SL
BrandMicrochip
TWD52.40
Each (In a Pack of 5)
units
PIC16F SOIC Surface Mount 14 PIC 8bit 14 kB 48MHz 1.024 kB 1 1 5 1 2.3 5.5 V
RS Stock No. 146-0212
Mfr. Part No.PIC16F1455-I/SL
BrandMicrochip
TWD45.70
Each (In a Tube of 57)
units
PIC16F SOIC Surface Mount 14 PIC 8bit 14 kB 48MHz 1.024 kB 1 1 5 1 2.3 5.5 V
RS Stock No. 840-6588
Mfr. Part No.MKE04Z8VWJ4
BrandNXP
TWD53.50
Each (In a Pack of 10)
units
Kinetis E SOIC Surface Mount 20 ARM Cortex M0+ 32bit 8 kB 48MHz 1 kB - 2 12 1 2.7 5.5 V
RS Stock No. 882-0281
Mfr. Part No.STM32F746VGT6
TWD492.00
Each
units
STM32F LQFP Surface Mount 100 ARM Cortex M7 32bit 1.024 MB 216MHz 340 kB 2 2 16 - 1.7 3.6 V
RS Stock No. 792-5934
Mfr. Part No.STM32F030R8T6
TWD66.00
Each (In a Pack of 5)
units
STM32F LQFP Surface Mount 64 ARM Cortex M0 32bit 64 kB 48MHz 8 kB - 1 18 2 3.6 V
RS Stock No. 889-5547
Mfr. Part No.PIC16F1503-I/SL
BrandMicrochip
TWD25.20
Each (In a Tube of 57)
units
PIC16F SOIC Surface Mount 14 PIC 8bit 2048 words 20MHz 128 B - 4 10 1 2.3 5.5 V
RS Stock No. 792-5925
Mfr. Part No.STM32F030F4P6
TWD39.30
Each (In a Pack of 10)
units
STM32F TSSOP Surface Mount 20 ARM Cortex M0 32bit 16 kB 48MHz 4 kB - 1 11 1 3.6 V
RS Stock No. 165-3456
Mfr. Part No.PIC16F1503-I/ST
BrandMicrochip
TWD25.80
Each (In a Tube of 96)
units
PIC16F TSSOP Surface Mount 14 PIC 8bit 2048 words 20MHz 128 B - 4 10 1 2.3 5.5 V
RS Stock No. 912-2991
Mfr. Part No.PIC12F1501-I/P
BrandMicrochip
TWD24.80
Each (In a Tube of 60)
units
PIC12F PDIP Through Hole 8 PIC 8bit 1024 words 20MHz 64 B - 4 4 - 2.3 to 5.5 V
RS Stock No. 882-0290
Mfr. Part No.STM32F746ZGT6
TWD481.00
Each
units
STM32F LQFP Surface Mount 144 ARM Cortex M7 32bit 1.024 MB 216MHz 340 kB 2 2 24 - 1.7 3.6 V