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. 168-7233
Mfr. Part No.STM8L051F3P6
HK$7.531
Each (In a Tube of 74)
units
STM8L TSSOP Surface Mount 20 STM8 8bit 8 kB 16MHz 1 kB - 1 10 1 3.6 V
RS Stock No. 795-7543
Mfr. Part No.STM8L051F3P6
HK$7.856
Each (In a Pack of 10)
units
STM8L TSSOP Surface Mount 20 STM8 8bit 8 kB 16MHz 1 kB - 1 10 1 3.6 V
RS Stock No. 165-8146
Mfr. Part No.STM32F410RBT6
HK$28.245
Each (In a Tray of 160)
units
STM32 LQFP Surface Mount 64 ARM Cortex M4 32bit 128 kB 100MHz 32 kB - - 16 - 1.7 → 3.6 V
RS Stock No. 102-3545
Mfr. Part No.STM32F103C8T6
HK$37.588
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. 402-279
Mfr. Part No.STM32F103C8T6
HK$53.73
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. 914-8158
Mfr. Part No.STM32F410RBT6
HK$40.645
Each (In a Pack of 2)
units
STM32 LQFP Surface Mount 64 ARM Cortex M4 32bit 128 kB 100MHz 32 kB - - 16 - 1.7 → 3.6 V
RS Stock No. 793-1392
Mfr. Part No.STM8S003F3P6
HK$5.526
Each (In a Pack of 10)
units
STM8S TSSOP Surface Mount 20 STM8 8bit 8 kB 16MHz 1 kB - 1 5 1 6.5 V
RS Stock No. 168-7137
Mfr. Part No.STM8S003F3P6
HK$5.355
Each (In a Tube of 74)
units
STM8S TSSOP Surface Mount 20 STM8 8bit 8 kB 16MHz 1 kB - 1 5 1 6.5 V
RS Stock No. 896-7692
Mfr. Part No.STM32L476RGT6
HK$73.82
Each
units
STM32 LQFP Surface Mount 64 ARM Cortex M4 32bit 1 MB 80MHz 128 kB 1 x OTG 2 16 - 3.6 (Maximum) V
RS Stock No. 792-5934
Mfr. Part No.STM32F030R8T6
HK$16.464
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. 165-6628
Mfr. Part No.STM32F405VGT6V
HK$116.733
Each (In a Tray of 540)
units
STM32F LQFP Surface Mount 100 ARM Cortex M4 32bit 1.024 MB 168MHz 196 kB 2 x OTG 1 19 3 1.8 → 3.6 V
RS Stock No. 810-3514
Mfr. Part No.STM32F405VGT6V
HK$146.04
Each
units
STM32F LQFP Surface Mount 100 ARM Cortex M4 32bit 1.024 MB 168MHz 196 kB 2 x OTG 1 19 3 1.8 → 3.6 V
RS Stock No. 920-6468
Mfr. Part No.STM32F407VGT6
HK$87.72
Each (In a Tray of 90)
units
STM32F LQFP Surface Mount 100 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. 810-7648
Mfr. Part No.STM32F217ZET6
HK$108.13
Each
units
STM32F LQFP Surface Mount 144 ARM Cortex M3 32bit 512 kB 120MHz 128 + 4 kB 1 x OTG 1 24 3 1.8 → 3.6 V
RS Stock No. 165-5858
Mfr. Part No.STM32F030K6T6
HK$8.246
Each (In a Tray of 250)
units
STM32F LQFP Surface Mount 32 ARM Cortex 32bit 32 kB 48MHz 4 kB - - 12 1 2.4 → 3.6 V
RS Stock No. 165-5557
Mfr. Part No.STM32F030K6T6TR
HK$7.958
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. 860-7508
Mfr. Part No.STM32F030K6T6TR
HK$11.616
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
RS Stock No. 165-5270
Mfr. Part No.STM8L151C8T6
HK$17.584
Each (In a Tray of 250)
units
STM8L LQFP Surface Mount 48 STM8 8bit 64 kB 16MHz 4 kB - 1 28 2 1.65 → 3.6 V
RS Stock No. 919-6270
Mfr. Part No.STM32F030R8T6
HK$12.249
Each (In a Tray of 160)
units
STM32F LQFP Surface Mount 64 ARM Cortex M0 32bit 64 kB 48MHz 8 kB - 1 18 2 3.6 V
RS Stock No. 792-6053
Mfr. Part No.STM32F429ZIT6
HK$156.22
Each
units
STM32F LQFP Surface Mount 144 ARM Cortex M4 32bit 2.048 MB 180MHz 256 kB 2 2 24 6 3.6 V