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. 889-5913
Mfr. Part No.PIC16F1825-I/SL
BrandMicrochip
$1.876
Each (In a Tube of 57)
units
PIC16F SOIC Surface Mount 14 PIC 8bit 14 kB 32MHz 1.024 kB, 256 B - 4 8 1 1.8 → 5.5 V
RS Stock No. 743-4728
Mfr. Part No.PIC16F1825-I/SL
BrandMicrochip
$2.185
Each (In a Pack of 4)
units
PIC16F SOIC Surface Mount 14 PIC 8bit 14 kB 32MHz 1.024 kB, 256 B - 4 8 1 1.8 → 5.5 V
RS Stock No. 920-6468
Mfr. Part No.STM32F407VGT6
$14.217
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. 905-3227
Mfr. Part No.PIC16F1579-I/SO
BrandMicrochip
$1.754
Each (In a Pack of 5)
units
PIC16LF SOIC Surface Mount 20 8 bit CPU 8bit 14 kB 32MHz 1.024 kB - 4 12 - 2.3 → 5.5 V
RS Stock No. 159-7415
Mfr. Part No.PIC24FV32KA301-I/P
BrandMicrochip
$4.82
Each (In a Tube of 22)
units
PIC24FV PDIP Through Hole 20 PIC 16bit 32 kB 32MHz 2.048 kB, 512 B - 1 12 2 2 → 5.5 V
RS Stock No. 165-3433
Mfr. Part No.PIC32MX250F128B-I/SP
BrandMicrochip
$5.659
Each (In a Tube of 15)
units
PIC32MX SPDIP Through Hole 28 PIC 32bit 128 kB 40MHz 32 kB 1 x OTG 5 10 2 2.3 → 3.6 V
RS Stock No. 145-9124
Mfr. Part No.PIC16F1579-I/SO
BrandMicrochip
$1.607
Each (In a Tube of 38)
units
PIC16LF SOIC Surface Mount 20 8 bit CPU 8bit 14 kB 32MHz 1.024 kB - 4 12 - 2.3 → 5.5 V
RS Stock No. 768-0836
Mfr. Part No.PIC32MX250F128B-I/SP
BrandMicrochip
$6.98
Each
units
PIC32MX SPDIP Through Hole 28 PIC 32bit 128 kB 40MHz 32 kB 1 x OTG 5 10 2 2.3 to 3.6 V
RS Stock No. 660-0849
Mfr. Part No.Z8L18020FSG
BrandZilog
$15.22
Each
units
Z80 PQFP Surface Mount 80 Z80 8bit - 20MHz - - - - - 3 → 5.5 V
RS Stock No. 146-1238
Mfr. Part No.Z8L18020FSG
BrandZilog
$15.872
Each (In a Tube of 66)
units
Z80 PQFP Surface Mount 80 Z80 8bit - 20MHz - - - - - 3 → 5.5 V
RS Stock No. 742-1170
Mfr. Part No.PIC24FV32KA301-I/P
BrandMicrochip
$4.82
Each
units
PIC24FV PDIP Through Hole 20 PIC 16bit 32 kB 32MHz 2.048 kB, 512 B - 1 12 2 2 to 5.5 V
RS Stock No. 746-8226
Mfr. Part No.STM32F407VGT6
$18.64
Each
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. 623-0099
Mfr. Part No.PIC12F509-I/P
BrandMicrochip
$1.41
Each
units
PIC12F PDIP Through Hole 8 PIC 8bit 1024 x 12 words 4MHz 41 B - - - - 2 to 5.5 V
RS Stock No. 146-8955
Mfr. Part No.ATSAM4E16CA-AU
BrandMicrochip
$11.26
Each
units
ATSAM LQFP Surface Mount 100 ARM Cortex M4 32bit 1.024 MB 120MHz 128 kB 1 1 10, 24 - 1.62 → 3.6 V
RS Stock No. 715-4343
Mfr. Part No.PIC16F1824-I/P
BrandMicrochip
$2.22
Each
units
PIC16F PDIP Through Hole 14 PIC 8bit 4 kB 32MHz 512 kB - 4 8 1 1.8 → 5.5 V
RS Stock No. 165-6629
Mfr. Part No.STM32F051K4T6TR
$2.02
Each (On a Reel of 2400)
units
STM32F LQFP Surface Mount 32 ARM Cortex M0 32bit 16 kB 48MHz 4 kB - 1 13 1 3.6 V
RS Stock No. 131-1192
Mfr. Part No.ATSAM4E16CA-AU
BrandMicrochip
$11.26
Each
units
SAM4E LQFP Surface Mount 100 ARM Cortex M4 32bit 1.024 MB 120MHz 128 kB 1 1 2 - 1.2 V, 3.3 V
RS Stock No. 121-4233
Mfr. Part No.PIC16F628A-I/P
BrandMicrochip
$4.608
Each (In a Pack of 5)
units
PIC16F628A PDIP Through Hole 18 PIC 8bit 3.5 kB 20MHz 224 B - - - - 3 → 5.5 V
RS Stock No. 165-4295
Mfr. Part No.PIC32MX470F512H-I/PT
BrandMicrochip
$7.602
Each (In a Tray of 160)
units
PIC32MX TQFP Surface Mount 64 PIC 32bit 512 + 12 kB 100MHz 128 kB 1 x OTG, 2 x DMA 1 28 2 2.3 → 3.6 V
RS Stock No. 911-5836
Mfr. Part No.PIC16F54-I/P
BrandMicrochip
$1.282
Each (In a Tube of 25)
units
PIC16F PDIP Through Hole 18 PIC 8bit 512 x 12 words 20MHz 25 B - - - - 2 to 5.5 V