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
New
RS Stock No. 199-5394
Mfr. Part No.PIC16C54C-04I/SO
TWD88.00
Each (In a Pack of 5)
units
Microcontrollers SOIC Surface Mount 18 - 8bit 8 kB 20MHz - - - - - -
New
RS Stock No. 199-5374
Mfr. Part No.PIC18F4431-I/PT
TWD301.00
Each
units
Microcontrollers TQFP Surface Mount 44 - 8bit 8 kB 20MHz - - - - - -
New
RS Stock No. 199-5402
Mfr. Part No.PIC18F2680-I/SO
TWD347.60
Each (In a Tube of 27)
units
Microcontrollers SOIC Surface Mount 28 - 8bit 8 kB 20MHz - - - - - -
New
RS Stock No. 199-5391
Mfr. Part No.PIC16F716T-I/SO
TWD47.40
Each (On a Reel of 1100)
units
Microcontrollers SOIC Through Hole 18 - 8bit 8 kB 20MHz - - - - - -
New
RS Stock No. 199-5408
Mfr. Part No.PIC12F683-E/MD
TWD113.00
Each (In a Pack of 5)
units
Microcontrollers DFN-S Surface Mount 8 - 8bit 8 kB 20MHz - - - - - -
New
RS Stock No. 199-5389
Mfr. Part No.PIC16F505T-I/SL
TWD27.00
Each (On a Reel of 2600)
units
Microcontrollers SOIC Surface Mount 14 - 8bit 8 kB 20MHz - - - - - -
New
RS Stock No. 199-5383
Mfr. Part No.PIC12F1571T-I/SN
TWD18.30
Each (On a Reel of 3300)
units
Microcontrollers SOIC Surface Mount 8 - 8bit 8 kB 20MHz - - - - - -
New
RS Stock No. 199-5377
Mfr. Part No.PIC18LF4520-I/PT
TWD296.00
Each
units
Microcontrollers TQFP Through Hole 40 - 8bit 8 kB 20MHz - - - - - -
New
RS Stock No. 199-5365
Mfr. Part No.ATMEGA162V-8AU
TWD202.00
Each (In a Pack of 2)
units
Microcontrollers 44A Surface Mount 44 - 8bit 8 kB 20MHz - - - - - -
New
RS Stock No. 199-5398
Mfr. Part No.ATTINY2313-20SUR
TWD56.50
Each (On a Reel of 1000)
units
Microcontrollers 20S Through Hole 20 - 8bit 8 kB 20MHz - - - - - -
New
RS Stock No. 199-5356
Mfr. Part No.PIC16F877-20I/PQ
TWD387.40
Each (In a Tray of 96)
units
Microcontrollers MQFP Surface Mount 80 - 8bit 8 kB 20MHz - - - - - -
New
RS Stock No. 199-5362
Mfr. Part No.AT89S51-24AU
TWD48.40
Each (In a Tray of 160)
units
Microcontrollers 44A Surface Mount 44 - 8bit 8 kB 20MHz - - - - - -
New
RS Stock No. 199-5358
Mfr. Part No.AT89C51AC2-SLSUM
TWD257.30
Each (In a Tube of 27)
units
Microcontrollers PLCC44 Surface Mount 44 - 8bit 8 kB 20MHz - - - - - -
New
RS Stock No. 199-5380
Mfr. Part No.PIC18LF4620-I/PT
TWD264.30
Each (In a Tray of 160)
units
Microcontrollers TQFP Through Hole 40 - 8bit 8 kB 20MHz - - - - - -
New
RS Stock No. 199-5403
Mfr. Part No.PIC18F2680-I/SO
TWD422.00
Each
units
Microcontrollers SOIC Surface Mount 28 - 8bit 8 kB 20MHz - - - - - -
New
RS Stock No. 199-5378
Mfr. Part No.PIC18LF452-I/PT
TWD298.00
Each (In a Tray of 160)
units
Microcontrollers TQFP Through Hole 40 - 8bit 8 kB 20MHz - - - - - -
New
RS Stock No. 199-5392
Mfr. Part No.PIC16F716T-I/SO
TWD67.00
Each (In a Pack of 5)
units
Microcontrollers SOIC Through Hole 18 - 8bit 8 kB 20MHz - - - - - -
New
RS Stock No. 199-5351
Mfr. Part No.ATMEGA88-20MU
TWD82.00
Each (In a Tray of 490)
units
Microcontrollers 32M1-A Surface Mount 32 - 8bit 8 kB 20MHz - - - - - -
New
RS Stock No. 199-5405
Mfr. Part No.PIC16F873A-I/SS
TWD206.80
Each (In a Tube of 47)
units
Microcontrollers SSOP Surface Mount 28 - 8bit 8 kB 20MHz - - - - - -
New
RS Stock No. 199-5366
Mfr. Part No.ATMEGA324PB-AN
TWD59.60
Each (In a Tray of 160)
units
Microcontrollers 44A Surface Mount 44 - 8bit 8 kB 20MHz - - - - - -