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. 177-7178
Mfr. Part No.STM32F101ZGT6
$12.93
Each (In a Tray of 60)
units
STM32F LQFP Surface Mount 144 ARM Cortex M3 32bit 1 MB 36MHz 80 kB - 10 16 3 2 → 3.6 V
RS Stock No. 775-2896
Mfr. Part No.STM32F101ZGT6
$14.70
Each
units
STM32F LQFP Surface Mount 144 ARM Cortex M3 32bit 1 MB 36MHz 80 kB - 10 16 3 2 → 3.6 V
RS Stock No. 110-6133
Mfr. Part No.STM32F070CBT6
$3.90
Each (In a Pack of 5)
units
STM32 LQFP Surface Mount 48 ARM Cortex M0 32bit 128 kB 48MHz 16 kB 1 - 13 - 2.4 → 3.6 V
RS Stock No. 145-8756
Mfr. Part No.STM32F070CBT6
$2.65
Each (In a Tray of 250)
units
STM32 LQFP Surface Mount 48 ARM Cortex M0 32bit 128 kB 48MHz 16 kB 1 - 13 - 2.4 → 3.6 V
RS Stock No. 792-5928
Mfr. Part No.STM32F030C6T6
$2.48
Each (In a Pack of 5)
units
STM32F LQFP Surface Mount 48 ARM Cortex M0 32bit 32 kB 48MHz 4 kB - 1 12 1 3.6 V
RS Stock No. 919-6264
Mfr. Part No.STM32F030C6T6
$1.69
Each (In a Tray of 250)
units
STM32F LQFP Surface Mount 48 ARM Cortex M0 32bit 32 kB 48MHz 4 kB - 1 12 1 3.6 V
RS Stock No. 714-7676
Mfr. Part No.STM32F101C6T6A
$4.62
Each
units
STM32F LQFP Surface Mount 48 ARM Cortex M3 32bit 32 kB 36MHz 6 kB - 2 10 1 2 → 3.6 V
RS Stock No. 919-6270
Mfr. Part No.STM32F030R8T6
$2.10
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. 168-6893
Mfr. Part No.STM32F101C6T6A
$5.105
Each (In a Tray of 250)
units
STM32F LQFP Surface Mount 48 ARM Cortex M3 32bit 32 kB 36MHz 6 kB - 2 10 1 2 → 3.6 V
RS Stock No. 792-5934
Mfr. Part No.STM32F030R8T6
$3.09
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. 919-6302
Mfr. Part No.STM32F405RGT6TR
$10.56
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. 792-6013
Mfr. Part No.STM32F405RGT6TR
$16.65
Each
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. 165-6631
Mfr. Part No.STM32F373C8T6TR
$3.47
Each (On a Reel of 2400)
units
STM32F LQFP Surface Mount 48 ARM Cortex M4 32bit 64 kB 72MHz 16 kB 1 11 11, 16, 21 3 3.6 V
RS Stock No. 792-5987
Mfr. Part No.STM32F373C8T6TR
$6.78
Each (In a Pack of 2)
units
STM32F LQFP Surface Mount 48 ARM Cortex M4 32bit 64 kB 72MHz 16 kB 1 11 11, 16, 21 3 3.6 V
RS Stock No. 746-8217
Mfr. Part No.STM32F405RGT6
$15.51
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. 145-9654
Mfr. Part No.STM32F373C8T6
$4.50
Each (In a Tray of 250)
units
STM32F LQFP Surface Mount 48 ARM Cortex M4 32bit 64 kB 72MHz 16 kB 1 1 x 16 bit - 3 3.6 V
RS Stock No. 166-1143
Mfr. Part No.STM32L051K8T6
$3.14
Each (In a Tray of 250)
units
STM32 LQFP Surface Mount 32 ARM Cortex M0+ 32bit 64 kB 32MHz 8 kB - - 10 - 1.65 → 3.6 V
RS Stock No. 110-7088
Mfr. Part No.STM32L051K8T6
$4.50
Each (In a Pack of 2)
units
STM32 LQFP Surface Mount 32 ARM Cortex M0+ 32bit 64 kB 32MHz 8 kB - - 10 - 1.65 → 3.6 V
RS Stock No. 795-9164
Mfr. Part No.STM32F373C8T6
$6.45
Each
units
STM32F LQFP Surface Mount 48 ARM Cortex M4 32bit 64 kB 72MHz 16 kB 1 1 x 16 bit - 3 3.6 V
RS Stock No. 920-6456
Mfr. Part No.STM32F405RGT6
$12.05
Each (In a Tray of 160)
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