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. 666-8630
Mfr. Part No.PIC16F722-I/SP
BrandMicrochip
TWD51.00
Each (In a Pack of 2)
units
PIC16F SPDIP Through Hole 28 PIC 8bit 2048 x 14 words 20MHz 128 B - 2 11 1 1.8 to 5.5 V
RS Stock No. 144-9195
Mfr. Part No.PIC16F722-I/SP
BrandMicrochip
TWD50.30
Each (In a Tube of 15)
units
PIC16F SPDIP Through Hole 28 PIC 8bit 2048 x 14 words 20MHz 128 B - 2 11 1 1.8 → 5.5 V
RS Stock No. 921-4545
Mfr. Part No.ATMEGA328P-PU
BrandMicrochip
TWD98.90
Each (In a Tube of 14)
units
ATmega PDIP Through Hole 28 AVR 8bit 1 kB, 32 kB 20MHz 2 kB - 3 6 1 1.8 → 5.5 V
RS Stock No. 328-2025
Mfr. Part No.PIC16C54C-04/P
BrandMicrochip
TWD54.00
Each
units
PIC16C PDIP Through Hole 18 PIC 8bit 512 x 12 words 4MHz 25 B - - - - 2.5 → 5.5 V
RS Stock No. 144-9117
Mfr. Part No.PIC16C54C-04/P
BrandMicrochip
TWD49.60
Each (In a Tube of 25)
units
PIC16C PDIP Through Hole 18 PIC 8bit 512 x 12 words 4MHz 25 B - - - - 2.5 → 5.5 V
RS Stock No. 165-1960
Mfr. Part No.PIC12F1571-I/P
BrandMicrochip
TWD20.20
Each (In a Tube of 60)
units
PIC12F PDIP Through Hole 8 PIC 8bit 1 kwords 16MHz 128 B 1 3 4 - 5.5 V
RS Stock No. 876-6714
Mfr. Part No.PIC16F887-I/P
BrandMicrochip
TWD75.40
Each (In a Tube of 10)
units
PIC16F PDIP Through Hole 40 PIC 8bit 8192 words 20MHz 368 B - 2 14 1 2 to 5.5 V
RS Stock No. 399-410
Mfr. Part No.PIC16F887-I/P
BrandMicrochip
TWD76.60
Each (In a Pack of 5)
units
PIC16F PDIP Through Hole 40 PIC 8bit 256 B, 8192 x 14 words 20MHz 368 B - 2 14 1 2 to 5.5 V
RS Stock No. 814-3067
Mfr. Part No.PIC12F1571-I/P
BrandMicrochip
TWD22.00
Each (In a Pack of 10)
units
PIC12F PDIP Through Hole 8 PIC 8bit 1 kwords 16MHz 128 B 1 3 4 - 5.5 V
RS Stock No. 810-3942
Mfr. Part No.PIC16F1704-I/P
BrandMicrochip
TWD39.20
Each (In a Pack of 5)
units
PIC16F PDIP Through Hole 14 PIC 8bit 4096 words 32MHz 512 B 1 1 8 1 2.3 → 5.5 V
RS Stock No. 159-7457
Mfr. Part No.PIC16F1704-I/P
BrandMicrochip
TWD30.20
Each (In a Tube of 30)
units
PIC16F PDIP Through Hole 14 PIC 8bit 4096 words 32MHz 512 B 1 1 8 1 2.3 → 5.5 V
RS Stock No. 819-5301
Mfr. Part No.DSPIC30F3010-30I/SP
BrandMicrochip
TWD145.00
Each (In a Tube of 15)
units
DsPIC30F SPDIP Through Hole 28 PIC 16bit 24 kB 25MHz 1.024 kB - 2 6 1 2.5 to 5.5 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. 889-5238
Mfr. Part No.PIC12F1822-I/SN
BrandMicrochip
TWD28.20
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. 628-3431
Mfr. Part No.ATMEGA8L-8AU
BrandMicrochip
TWD85.00
Each
units
ATmega TQFP Surface Mount 32 AVR 8bit 8 kB, 512 B 8MHz 1 kB - 2 8 1 2.7 → 5.5 V
RS Stock No. 165-1997
Mfr. Part No.PIC16F1503-E/ST
BrandMicrochip
TWD27.60
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. 703-7885
Mfr. Part No.PIC12F1822-I/SN
BrandMicrochip
TWD35.00
Each
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. 916-3734
Mfr. Part No.PIC16F18313-I/P
BrandMicrochip
TWD28.50
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. 146-0212
Mfr. Part No.PIC16F1455-I/SL
BrandMicrochip
TWD44.80
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. 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