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. 199-5368
Mfr. Part No.ATMEGA644PV-10AU
PHP298.397
Each (In a Tray of 160)
units
Microcontrollers 44A Surface Mount 44 - 8bit 8 kB 20MHz - - - - - -
New
RS Stock No. 199-5371
Mfr. Part No.PIC18F4420-I/PT
PHP299.273
Each (In a Tray of 160)
units
Microcontrollers TQFP Surface Mount 44 - 8bit 8 kB 20MHz - - - - - -
New
RS Stock No. 199-5400
Mfr. Part No.PIC16F876-20I/SO
PHP482.647
Each (In a Tube of 27)
units
Microcontrollers SOIC Surface Mount 28 - 8bit 8 kB 20MHz - - - - - -
New
RS Stock No. 199-5412
Mfr. Part No.ATTINY13A-SUR
PHP44.891
Each (On a Reel of 2000)
units
Microcontrollers 8S2 Surface Mount 8 - - 8 kB 20MHz - - - - - -
New
RS Stock No. 199-5386
Mfr. Part No.PIC12F1572T-I/SN
PHP48.52
Each (In a Pack of 10)
units
Microcontrollers SOIC Surface Mount 8 - 8bit 8 kB 20MHz - - - - - -
New
RS Stock No. 199-5372
Mfr. Part No.PIC18F4420-I/PT
PHP423.255
Each (In a Pack of 2)
units
Microcontrollers TQFP Surface Mount 44 - 8bit 8 kB 20MHz - - - - - -
New
RS Stock No. 199-5373
Mfr. Part No.PIC18F4431-I/PT
PHP367.05
Each (In a Tray of 160)
units
Microcontrollers TQFP Surface Mount 44 - 8bit 8 kB 20MHz - - - - - -
New
RS Stock No. 199-5354
Mfr. Part No.AT90PWM316-16MU
PHP150.517
Each (In a Tray of 260)
units
Microcontrollers QFN32 Surface Mount 32 - 8bit 8 kB 20MHz - - - - - -
New
RS Stock No. 199-5379
Mfr. Part No.PIC18LF452-I/PT
PHP728.55
Each
units
Microcontrollers TQFP Through Hole 40 - 8bit 8 kB 20MHz - - - - - -
New
RS Stock No. 199-5357
Mfr. Part No.PIC16F877-20I/PQ
PHP811.64
Each
units
Microcontrollers MQFP Surface Mount 80 - 8bit 8 kB 20MHz - - - - - -
New
RS Stock No. 199-5355
Mfr. Part No.AT90PWM316-16MU
PHP212.926
Each (In a Pack of 5)
units
Microcontrollers QFN32 Surface Mount 32 - 8bit 8 kB 20MHz - - - - - -
New
RS Stock No. 199-5409
Mfr. Part No.ATTINY4-TSHR
PHP18.485
Each (On a Reel of 4500)
units
Microcontrollers 6ST1 Surface Mount 6 - 8bit 8 kB 20MHz - - - - - -
New
RS Stock No. 199-5361
Mfr. Part No.AT89LP52-20AU
PHP94.666
Each (In a Pack of 5)
units
Microcontrollers 44A Surface Mount 44 - 8bit 8 kB 20MHz - - - - - -
New
RS Stock No. 199-5351
Mfr. Part No.ATMEGA88-20MU
PHP141.715
Each (In a Tray of 490)
units
Microcontrollers 32M1-A Surface Mount 32 - 8bit 8 kB 20MHz - - - - - -
New
RS Stock No. 199-5393
Mfr. Part No.PIC16C54C-04I/SO
PHP125.293
Each (In a Tube of 42)
units
Microcontrollers SOIC Surface Mount 18 - 8bit 8 kB 20MHz - - - - - -
New
RS Stock No. 199-5374
Mfr. Part No.PIC18F4431-I/PT
PHP519.33
Each
units
Microcontrollers TQFP Surface Mount 44 - 8bit 8 kB 20MHz - - - - - -
New
RS Stock No. 199-5402
Mfr. Part No.PIC18F2680-I/SO
PHP600.747
Each (In a Tube of 27)
units
Microcontrollers SOIC Surface Mount 28 - 8bit 8 kB 20MHz - - - - - -
New
RS Stock No. 199-5359
Mfr. Part No.AT89C51AC2-SLSUM
PHP539.36
Each
units
Microcontrollers PLCC44 Surface Mount 44 - 8bit 8 kB 20MHz - - - - - -
New
RS Stock No. 199-5401
Mfr. Part No.PIC16F876-20I/SO
PHP585.36
Each
units
Microcontrollers SOIC Surface Mount 28 - 8bit 8 kB 20MHz - - - - - -
New
RS Stock No. 199-5413
Mfr. Part No.ATTINY13A-SUR
PHP63.507
Each (In a Pack of 10)
units
Microcontrollers 8S2 Surface Mount 8 - - 8 kB 20MHz - - - - - -