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. 165-3470
Mfr. Part No.PIC18F45K22-E/P
BrandMicrochip
€2.996
Each (In a Tube of 10)
units
- - - - - - - - 1.536 kB - - - - -
RS Stock No. 860-7508
Mfr. Part No.STM32F030K6T6TR
€1.494
Each (In a Pack of 5)
units
STM32F LQFP Surface Mount 32 ARM Cortex M0 32bit 32 kB 48MHz 4 kB - 1 12 1 2.4 → 3.6 V
RS Stock No. 165-5858
Mfr. Part No.STM32F030K6T6
€0.978
Each (In a Tray of 250)
units
STM32F LQFP Surface Mount 32 ARM Cortex 32bit 32 kB 48MHz 4 kB - - 12 1 2.4 → 3.6 V
RS Stock No. 165-5557
Mfr. Part No.STM32F030K6T6TR
€0.617
Each (On a Reel of 2400)
units
STM32F LQFP Surface Mount 32 ARM Cortex 32bit 32 kB 48MHz 4 kB - - 12 1 2.4 → 3.6 V
RS Stock No. 829-4644
Mfr. Part No.STM32F030K6T6
€1.308
Each (In a Pack of 10)
units
STM32F LQFP Surface Mount 32 ARM Cortex 32bit 32 kB 48MHz 4 kB - - 12 1 2.4 → 3.6 V
RS Stock No. 703-7747
Mfr. Part No.PIC18F45K22-E/P
BrandMicrochip
€3.00
Each
units
PIC18F PDIP Through Hole 40 PIC 8bit 32.768 kB, 256 B 16MHz 1.536 kB - 5 30 2 2.3 to 5.5 V
RS Stock No. 817-6411
Mfr. Part No.MSP430G2553IN20
€2.268
Each (In a Pack of 5)
units
MSP430 PDIP Through Hole 20 MSP430 16bit 16 kB 16MHz 512 B - - 8 2 1.8 → 3.6 V
RS Stock No. 121-9714
Mfr. Part No.MSP430G2553IN20
€1.918
Each (In a Tube of 20)
units
MSP430 PDIP Through Hole 20 MSP430 16bit 16 kB 16MHz 512 B - - 8 2 1.8 → 3.6 V
RS Stock No. 564-232
Mfr. Part No.PIC18F45K20-I/P
BrandMicrochip
€2.518
Each (In a Pack of 5)
units
PIC18F PDIP Through Hole 40 PIC 8bit 32 kB, 256 B 64MHz 1.536 kB - 2 14 1 1.8 to 3.6 V
RS Stock No. 165-4832
Mfr. Part No.PIC18F45K20-I/P
BrandMicrochip
€2.517
Each (In a Tube of 10)
units
- - - - - - - - 1.536 kB - - - - -
RS Stock No. 887-7151
Mfr. Part No.PIC12F683-I/P
BrandMicrochip
€1.316
Each (In a Tube of 60)
units
PIC12F PDIP Through Hole 8 PIC 8bit 256 B, 2048 x 14 words 20MHz 128 B - 1 4 - 2 to 5.5 V
RS Stock No. 121-4232
Mfr. Part No.PIC12F683-I/P
BrandMicrochip
€1.426
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. 887-7372
Mfr. Part No.PIC16F88-I/SO
BrandMicrochip
€2.995
Each (In a Tube of 42)
units
PIC16F SOIC Surface Mount 18 PIC 8bit 7.168 kB, 256 B 20MHz 368 B - 1 7 1 4 → 5.5 V
RS Stock No. 623-0500
Mfr. Part No.PIC16F88-I/SO
BrandMicrochip
€3.13
Each
units
PIC16F SOIC Surface Mount 18 PIC 8bit 7.168 kB, 256 B 20MHz 368 B - 1 7 1 4 → 5.5 V
RS Stock No. 623-0803
Mfr. Part No.PIC18F4550-I/P
BrandMicrochip
€5.45
Each
units
PIC18F PDIP Through Hole 40 PIC 8bit 32 kB, 256 B 48MHz 2.048 kB 1 x Device 2 13 1 4.2 to 5.5 V
RS Stock No. 887-7142
Mfr. Part No.PIC18F4550-I/P
BrandMicrochip
€5.154
Each (In a Tube of 10)
units
PIC18F PDIP Through Hole 40 PIC 8bit 32 kB, 256 B 48MHz 2.048 kB 1 x Device 2 13 1 4.2 to 5.5 V
RS Stock No. 165-4264
Mfr. Part No.PIC32MX470F512L-I/PT
BrandMicrochip
€5.198
Each (In a Tray of 119)
units
PIC32MX TQFP Surface Mount 100 PIC 32bit 512 + 12 kB 100MHz 128 kB 1 x OTG, 2 x DMA 1 28 2 2.3 → 3.6 V
RS Stock No. 829-0585
Mfr. Part No.PIC32MX470F512L-I/PT
BrandMicrochip
€6.28
Each
units
PIC32MX TQFP Surface Mount 100 PIC 32bit 512 + 12 kB 100MHz 128 kB 1 x OTG, 2 x DMA 1 28 2 2.3 → 3.6 V
RS Stock No. 145-9607
Mfr. Part No.STM32F103RCT6
€4.197
Each (In a Tray of 160)
units
STM32F LQFP Surface Mount 64 ARM Cortex M3 32bit 256 kB 72MHz 48 kB 1 x Device 2 16 3 2 → 3.6 V
RS Stock No. 714-1079
Mfr. Part No.STM32F103RCT6
€6.04
Each
units
STM32F LQFP Surface Mount 64 ARM Cortex M3 32bit 256 kB 72MHz 48 kB 1 x Device 2 16 3 2 → 3.6 V