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. 912-6858
Mfr. Part No.PIC24FJ128GA310-I/PT
BrandMicrochip
$5.511
Each (In a Tray of 119)
units
PIC24FJ TQFP Surface Mount 100 PIC 16bit 128 kB 32MHz 8 kB - 7 24 2 2 → 3.6 V
RS Stock No. 775-3900
Mfr. Part No.R7F0C30542ESP#AC0
$0.372
Each (In a Pack of 25)
units
R7F0C30 SSOP Surface Mount 16 78K0 8bit 16 kB 10MHz 768 B - - 6 - 1.8 → 5.5 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. 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. 165-4094
Mfr. Part No.PIC16F684-E/P
BrandMicrochip
$3.08
Each (In a Tube of 30)
units
PIC16F PDIP Through Hole 14 PIC16F 8bit 3.5 kB 20MHz 128 B 1 2 8 1 2 → 5.5 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. 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
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. 724-9924
Mfr. Part No.STM8S105K4B6
$2.825
Each (In a Pack of 2)
units
STM8S SPDIP Through Hole 32 STM8 8bit 1.024 kB, 16 kB 16MHz 2 kB - 2 7 1 2.95 → 5.5 V
RS Stock No. 165-5558
Mfr. Part No.STM32F746NGH6
$15.36
Each (In a Tray of 160)
units
STM32F TFBGA Surface Mount 216 ARM Cortex M7 32bit 1.024 MB 216MHz 340 kB 2 2 24 - 1.7 → 3.6 V
RS Stock No. 911-5669
Mfr. Part No.PIC16F1825-I/ST
BrandMicrochip
$2.057
Each (In a Tube of 96)
units
PIC16F TSSOP Surface Mount 14 PIC 8bit 14 kB 32MHz 1.024 kB, 256 B - 4 8 1 1.8 → 5.5 V
RS Stock No. 145-9050
Mfr. Part No.PIC12F1612-I/P
BrandMicrochip
$1.342
Each (In a Tube of 60)
units
PIC12F PDIP Through Hole 8 PIC 8bit 2.048 kB 32MHz 256 B - 2 4 - 2.3 → 5.5 V
RS Stock No. 145-9378
Mfr. Part No.PIC16F88-E/P
BrandMicrochip
$7.417
Each (In a Tube of 25)
units
PIC16F PDIP Through Hole 18 PIC 8bit 7 kB 20MHz 368 B - 1 7 1 2 → 5.5 V
RS Stock No. 544-1608
Mfr. Part No.PIC16F630-I/P
BrandMicrochip
$2.412
Each (In a Pack of 5)
units
PIC16F PDIP Through Hole 14 PIC 8bit 128 B, 1024 x 14 words 20MHz 64 B - - - - 2 → 5.5 V
RS Stock No. 168-7137
Mfr. Part No.STM8S003F3P6
$1.11
Each (In a Tube of 74)
units
STM8S TSSOP Surface Mount 20 STM8 8bit 8 kB 16MHz 1 kB - 1 5 1 6.5 V
RS Stock No. 791-7738
Mfr. Part No.STM32F051K8T6TR
$4.94
Each (In a Pack of 5)
units
STM32F LQFP Surface Mount 32 ARM Cortex M0 32bit 64 kB 48MHz 8 kB - 1 16 1 3.6 V
RS Stock No. 810-7676
Mfr. Part No.STM32F373R8T6
$7.955
Each (In a Pack of 2)
units
STM32F LQFP Surface Mount 64 ARM Cortex M4 32bit 64 kB 72MHz 32 kB 1 2 16 3 2 → 3.6 V
RS Stock No. 165-4784
Mfr. Part No.PIC16F84-04I/P
BrandMicrochip
$8.349
Each (In a Tube of 25)
units
PIC16F PDIP Through Hole 18 PIC 8bit 1K x 14 words, 64 B 4MHz 68 B - - - - 4 → 6 V
RS Stock No. 146-0179
Mfr. Part No.PIC12F1840-E/P
BrandMicrochip
$1.991
Each (In a Tube of 60)
units
PIC12F PDIP Through Hole 8 PIC 8bit 7 kB 32MHz 256 B - 1 4 1 2.3 → 5.5 V
RS Stock No. 165-4753
Mfr. Part No.PIC16F876A-I/SO
BrandMicrochip
$7.722
Each (In a Tube of 27)
units
PIC16F SOIC Surface Mount 28 PIC 8bit 14.3 kB, 256 B 20MHz 368 B - 2 5 1 4 → 5.5 V
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