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. 876-7029
Mfr. Part No.PIC24FJ32GA002-I/SP
BrandMicrochip
PHP141.12
Each (In a Tube of 15)
units
PIC24FJ SPDIP Through Hole 28 PIC 16bit 32 kB 32MHz 8 kB 0 1 10 2 2 to 3.6 V
RS Stock No. 919-6302
Mfr. Part No.STM32F405RGT6TR
PHP497.447
Each (On a Reel of 1000)
units
STM32F LQFP Surface Mount 64 ARM Cortex M4 32bit 1.024 MB 168MHz 192 kB 2 2 16 3 3.6 V
RS Stock No. 905-5214
Mfr. Part No.PIC32MZ2048EFG100-I/PT
BrandMicrochip
PHP589.02
Each
units
PIC32 TQFP Surface Mount 100 MIPS® MicroAptiv™ 32bit 160 (Boot Flash) kB, 2.048 (Flash) MB 200MHz 512 kB 3 1 40 6 3.3 V
RS Stock No. 876-7158
Mfr. Part No.PIC18F4685-I/P
BrandMicrochip
PHP420.60
Each (In a Tube of 10)
units
PIC18F PDIP Through Hole 40 PIC 8bit 96 kB 40MHz 3.328 kB 0 2 11 1 2 to 5.5 V
RS Stock No. 165-4102
Mfr. Part No.PIC16F1705-I/SL
BrandMicrochip
PHP48.451
Each (In a Tube of 57)
units
PIC16F SOIC Surface Mount 14 - - - - - - - - 1 -
RS Stock No. 169-8225
Mfr. Part No.Z84C0008PEG
BrandZilog
PHP232.846
Each (In a Tube of 10)
units
Z80 PDIP Through Hole 40 Z8 8bit - 8MHz - 0 - - 0 4.5 → 5.5 V
RS Stock No. 912-6984
Mfr. Part No.PIC24FJ64GB002-I/SS
BrandMicrochip
PHP144.375
Each (In a Tube of 47)
units
PIC24FJ SSOP Surface Mount 28 PIC 16bit 64 kB 32MHz 8.192 kB 1 x Device, 1 x Host, 1 x OTG 1 9 2 2 → 3.6 V
RS Stock No. 746-8217
Mfr. Part No.STM32F405RGT6
PHP526.64
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 16 3 1.8 → 3.6 V
RS Stock No. 823-0906
Mfr. Part No.PIC24FJ64GB002-I/SS
BrandMicrochip
PHP179.47
Each (In a Pack of 2)
units
PIC24FJ SSOP Surface Mount 28 PIC 16bit 64 kB 32MHz 8.192 kB 1 x Device, 1 x Host, 1 x OTG 1 9 2 2 → 3.6 V
RS Stock No. 400-722
Mfr. Part No.PIC24FJ32GA002-I/SP
BrandMicrochip
PHP141.12
Each
units
PIC24FJ SPDIP Through Hole 28 PIC 16bit 32 kB 32MHz 8 kB 0 5 10 2 2 to 3.6 V
RS Stock No. 400-740
Mfr. Part No.PIC24FJ64GA002-I/SO
BrandMicrochip
PHP145.37
Each
units
PIC24FJ SOIC Surface Mount 28 PIC 16bit 64 kB 32MHz 8 kB 0 1 10 2 2 → 3.6 V
RS Stock No. 841-7548
Mfr. Part No.PIC32MX170F256B-50I/SP
BrandMicrochip
PHP212.19
Each (In a Pack of 3)
units
PIC32MX SPDIP Through Hole 28 PIC 32bit 64 kB 50MHz 256 kB 0 5 10 2 2.3 to 3.6 V
RS Stock No. 912-5293
Mfr. Part No.PIC16F1575-I/P
BrandMicrochip
PHP59.31
Each (In a Pack of 5)
units
PIC16 PDIP Through Hole 14 PIC 8bit 14 kB 32MHz 1.024 kB 1 1 12 - 2.3 to 5.5 V
RS Stock No. 901-5593
Mfr. Part No.R5F2L367CNFP#V2
PHP243.06
Each (In a Bag of 2)
units
R8C LQFP Surface Mount 64 R8C CPU 16bit 4 (Flash) kB, 48 (ROM) kB 20MHz 6 kB 0 0 10 - 1.8 → 5.5 V
RS Stock No. 916-3765
Mfr. Part No.PIC32MZ0512EFE064-I/PT
BrandMicrochip
PHP416.20
Each
units
PIC32MZ EF TQFP Surface Mount 64 - 32bit 512 kB 200MHz 128 kB 0 - 24 - 2.1 → 3.6 V
RS Stock No. 165-4194
Mfr. Part No.PIC32MZ0512EFE064-I/PT
BrandMicrochip
PHP464.163
Each (In a Tray of 160)
units
PIC32MZ EF TQFP Surface Mount 64 - 32bit 512 kB 200MHz 128 kB 0 - 24 - 2.1 → 3.6 V
RS Stock No. 623-0803
Mfr. Part No.PIC18F4550-I/P
BrandMicrochip
PHP316.62
Each
units
PIC18F PDIP Through Hole 40 PIC 8bit 32 kB, 256 B 48MHz 2.048 kB 1 x Device 2 13 1 4.2 to 5.5 V
RS Stock No. 169-8230
Mfr. Part No.Z84C2006PEG
BrandZilog
PHP232.846
Each (In a Tube of 10)
units
Z80 PDIP Through Hole 40 Z80 8bit - 6.17MHz - 0 - - 0 4.5 → 5.5 V
RS Stock No. 168-8821
Mfr. Part No.STM32F031K6T7
PHP88.73
Each (In a Tray of 250)
units
STM32F LQFP Surface Mount 32 ARM Cortex M0 32bit 32 kB 48MHz 4 kB 0 1 13 1 2 → 3.6 V
RS Stock No. 887-7142
Mfr. Part No.PIC18F4550-I/P
BrandMicrochip
PHP288.884
Each (In a Tube of 10)
units
PIC18F PDIP Through Hole 40 PIC 8bit 32 kB, 256 B 48MHz 2.048 kB 1 x Device 2 13 1 4.2 to 5.5 V
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