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. 467-1690
Mfr. Part No.PIC16F877A-I/P
BrandMicrochip
MYR26.66
Each
units
PIC16F PDIP Through Hole 40 PIC 8bit 14.3 kB, 256 B 20MHz 368 B - 2 8 1 4 → 5.5 V
RS Stock No. 887-7139
Mfr. Part No.PIC16F877A-I/P
BrandMicrochip
MYR25.261
Each (In a Tube of 10)
units
PIC16F PDIP Through Hole 40 PIC 8bit 14.3 kB, 256 B 20MHz 368 B - 2 8 1 4 → 5.5 V
RS Stock No. 887-7390
Mfr. Part No.PIC18F4525-I/PT
BrandMicrochip
MYR21.669
Each (In a Tray of 160)
units
PIC18F TQFP Surface Mount 44 PIC 8bit 1.024 kB, 48 kB 40MHz 3.986 kB - 2 13 1 4.2 → 5.5 V
RS Stock No. 666-9034
Mfr. Part No.PIC18F4525-I/PT
BrandMicrochip
MYR31.92
Each
units
PIC18F TQFP Surface Mount 44 PIC 8bit 1.024 kB, 48 kB 40MHz 3.986 kB - 2 13 1 4.2 → 5.5 V
RS Stock No. 144-5844
Mfr. Part No.PIC16F59-I/PT
BrandMicrochip
MYR5.452
Each (In a Tray of 160)
units
PIC16F TQFP Surface Mount 44 PIC 8bit 3 kB 20MHz 134 B - - - - 2 → 5.5 V
RS Stock No. 823-1053
Mfr. Part No.PIC16F59-I/PT
BrandMicrochip
MYR5.986
Each (In a Pack of 5)
units
PIC16F TQFP Surface Mount 44 PIC 8bit 3 kB 20MHz 134 B - - - - 2 → 5.5 V
RS Stock No. 829-1327
Mfr. Part No.R5F101MFAFA#V0
MYR18.795
Each (In a Pack of 2)
units
RL78/G13 LFQFP Surface Mount 80 RL78 16bit 96 kB 32MHz 8 kB - - 17 8 1.6 → 5.5 V
RS Stock No. 719-4004
Mfr. Part No.ATMEGA64A-AU
BrandAtmel
MYR23.65
Each
units
ATmega TQFP Surface Mount 64 AVR 8bit 2 kB, 64 kB 16MHz 4 kB - 4 8 1 2.7 → 5.5 V
RS Stock No. 575-046
Mfr. Part No.PIC24FJ256GB106-I/PT
BrandMicrochip
MYR33.58
Each
units
PIC24FJ TQFP Surface Mount 64 PIC 16bit 256 kB 32MHz 16 kB 1 x OTG 9 16 3 2 → 3.6 V
RS Stock No. 123-9798
Mfr. Part No.PIC24FJ256GB106-I/PT
BrandMicrochip
MYR22.53
Each (In a Tray of 160)
units
PIC24FJ TQFP Surface Mount 64 PIC 16bit 256 kB 32MHz 16 kB 1 x OTG 9 16 3 2 → 3.6 V
RS Stock No. 623-0005
Mfr. Part No.PIC10F200-I/P
BrandMicrochip
MYR2.44
Each
units
PIC10F PDIP Through Hole 8 PIC 8bit 256 x 12 words 4MHz 16 B - - - - 2 to 5.5 V
RS Stock No. 803-2336
Mfr. Part No.PIC16F753-I/P
BrandMicrochip
MYR4.483
Each (In a Pack of 10)
units
PIC16F PDIP Through Hole 14 PIC 8bit 2k words 20MHz 128 B 1 1 8 - 2 to 5.5 V
RS Stock No. 159-7455
Mfr. Part No.PIC16F753-I/P
BrandMicrochip
MYR4.416
Each (In a Tube of 30)
units
PIC16F PDIP Through Hole 14 PIC 8bit 2k words 20MHz 128 B 1 1 8 - 2 → 5.5 V
RS Stock No. 912-7012
Mfr. Part No.PIC10F200-I/P
BrandMicrochip
MYR2.28
Each (In a Tube of 60)
units
PIC10F PDIP Through Hole 8 PIC 8bit 256 x 12 words 4MHz 16 B - - - - 2 to 5.5 V
RS Stock No. 467-1498
Mfr. Part No.PIC16F873-20/SP
BrandMicrochip
MYR31.27
Each
units
PIC16F SPDIP Through Hole 28 PIC 8bit 8K x 14 words, 256 x 8 words 20MHz 192 B - 2 5 1 4 → 5.5 V
RS Stock No. 768-0836
Mfr. Part No.PIC32MX250F128B-I/SP
BrandMicrochip
MYR21.44
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. 829-1027
Mfr. Part No.R5F10Y16ASP#V0
MYR2.726
Each (In a Pack of 10)
units
RL78 LSSOP Surface Mount 10 RL78-S1 16bit 2 kB 20MHz 256 B - 1 4 1 2 → 5.5 V
RS Stock No. 165-4773
Mfr. Part No.PIC16F873-20/SP
BrandMicrochip
MYR28.997
Each (In a Tube of 15)
units
PIC16F SPDIP Through Hole 28 PIC 8bit 8K x 14 words, 256 x 8 words 20MHz 192 B - 2 5 1 4 → 5.5 V
RS Stock No. 165-3433
Mfr. Part No.PIC32MX250F128B-I/SP
BrandMicrochip
MYR21.079
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. 168-9641
Mfr. Part No.MC68HC705C8ACFNE
BrandNXP
MYR79.077
Each (In a Tube of 26)
units
M68HC05 PLCC Surface Mount 44 HC05 8bit 8 kB 2.1MHz 304 B - - - 1 3 → 5.5 V
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