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. 165-4891
Mfr. Part No.PIC16F684-I/ST
BrandMicrochip
$2.899
Each (In a Tube of 96)
units
PIC16F TSSOP Surface Mount 14 PIC 8bit 256 B, 2048 x 14 words 20MHz 128 B - - 8 1 2 → 5.5 V
RS Stock No. 144-5859
Mfr. Part No.PIC12F1571-I/MS
BrandMicrochip
$0.886
Each (In a Tube of 100)
units
PIC12F MSOP Surface Mount 8 PIC 8bit 1K words 32MHz 128 B - - 4 - 2.3 → 5.5 V
RS Stock No. 176-8962
Mfr. Part No.CY8C4247LQI-BL483
$7.799
Each (In a Tray of 260)
units
CY8C4200 QFN Surface Mount 56 ARM Cortex M0 32bit 128 kb 48MHz 16 kB - 1 1 2 1.8 → 5.5 V
RS Stock No. 715-4202
Mfr. Part No.PIC18F66K80-I/PT
BrandMicrochip
$6.91
Each
units
PIC18F TQFP Surface Mount 64 PIC 8bit 64 kB 64MHz 1.024 kB, 3.648 kB - 2 11 1 3.3 V
RS Stock No. 876-6868
Mfr. Part No.PIC16F913-I/SP
BrandMicrochip
$5.019
Each (In a Tube of 15)
units
PIC16F SPDIP Through Hole 28 PIC 8bit 7 kB 20MHz 256 B - 1 5 1 2 to 5.5 V
RS Stock No. 144-9141
Mfr. Part No.PIC16F877-04/PQ
BrandMicrochip
$11.638
Each (In a Tray of 96)
units
PIC16F MQFP Surface Mount 44 PIC 8bit 8K x 14 words, 256 x 8 words 4MHz 368 B - 2 8 1 4 → 5.5 V
RS Stock No. 625-9040
Mfr. Part No.Z84C4008PEG
BrandZilog
$17.04
Each
units
Z80 PDIP Through Hole 40 Z8 8bit - 8MHz - - - - 1 4.5 → 5.5 V
RS Stock No. 124-2964
Mfr. Part No.CY8C4247LQI-BL483
$11.485
Each (In a Pack of 2)
units
PSoC 4 BLE QFN Surface Mount 56 ARM Cortex M0 32bit 128 kB 48MHz 16 kB - - 1 - 1.8 → 5.5 V
RS Stock No. 889-5351
Mfr. Part No.PIC12F508-I/P
BrandMicrochip
$1.076
Each (In a Tube of 60)
units
PIC12 PDIP Through Hole 8 PIC 8bit 512 x 12 words 4MHz 25 B - - - - 2 to 5.5 V
RS Stock No. 761-7260
Mfr. Part No.PIC24FJ128GA310-I/PT
BrandMicrochip
$6.64
Each
units
PIC24FJ TQFP Surface Mount 100 PIC 16bit 128 kB 32MHz 8 kB - 7 24 2 2 → 3.6 V
RS Stock No. 165-8942
Mfr. Part No.Z84C4008PEG
BrandZilog
$17.039
Each (In a Tube of 10)
units
Z80 PDIP Through Hole 40 Z8 8bit - 8MHz - - - - 1 4.5 → 5.5 V
RS Stock No. 126-2152
Mfr. Part No.PIC18F47K40-I/P
BrandMicrochip
$3.898
Each (In a Pack of 5)
units
PIC18F DIP Surface Mount 40 PIC18 8bit 128 kB 64MHz 3.728 kB - 1 35 - 2.3 → 5.5 V
RS Stock No. 121-4232
Mfr. Part No.PIC12F683-I/P
BrandMicrochip
$2.50
Each (In a Pack of 5)
units
PIC12F683 PDIP Through Hole 8 PIC 8bit 3.5 kB 20MHz 128 B - - 4 - 2 → 5.5 V
RS Stock No. 176-8982
Mfr. Part No.CY8C4247LQI-BL483
$11.48
Each
units
CY8C4200 QFN Surface Mount 56 ARM Cortex M0 32bit 48 kB 48MHz 16 kB - 1 1 2 1.8 → 5.5 V
RS Stock No. 889-5367
Mfr. Part No.PIC18F66K80-I/PT
BrandMicrochip
$5.947
Each (In a Tray of 160)
units
PIC18F TQFP Surface Mount 64 PIC 8bit 64 kB 64MHz 1.024 kB, 3.648 kB - 2 11 1 3.3 V
RS Stock No. 400-453
Mfr. Part No.PIC16F913-I/SP
BrandMicrochip
$5.03
Each (In a Pack of 5)
units
PIC16F SPDIP Through Hole 28 PIC 8bit 7 kB, 256 B 20MHz 256 B - 1 5 1 4.5 to 5.5 V
RS Stock No. 379-3159
Mfr. Part No.PIC16F877-04/PQ
BrandMicrochip
$12.76
Each
units
PIC16F MQFP Surface Mount 44 PIC 8bit 8K x 14 words, 256 x 8 words 4MHz 368 B - 2 8 1 4 → 5.5 V
RS Stock No. 746-8226
Mfr. Part No.STM32F407VGT6
$20.36
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. 623-0364
Mfr. Part No.PIC16F684-I/ST
BrandMicrochip
$2.88
Each
units
PIC16F TSSOP Surface Mount 14 PIC 8bit 256 B, 2048 x 14 words 20MHz 128 B - - 8 1 2 → 5.5 V
RS Stock No. 824-3094
Mfr. Part No.PIC12F1571-I/MS
BrandMicrochip
$0.925
Each (In a Pack of 20)
units
PIC12F MSOP Surface Mount 8 PIC 8bit 1K words 32MHz 128 B - - 4 - 2.3 → 5.5 V
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