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. 165-4083
Mfr. Part No.PIC32MX170F256B-I/SP
BrandMicrochip
$5.575
Each (In a Tube of 15)
units
PIC32MX SPDIP Through Hole 28 PIC 32bit 256 + 3 kB 50MHz 64 kB - 1 10 2 2.3 → 3.6 V
RS Stock No. 399-410
Mfr. Part No.PIC16F887-I/P
BrandMicrochip
$2.952
Each (In a Pack of 5)
units
PIC16F PDIP Through Hole 40 PIC 8bit 256 B, 8192 x 14 words 20MHz 368 B - 2 14 1 2 to 5.5 V
RS Stock No. 876-6714
Mfr. Part No.PIC16F887-I/P
BrandMicrochip
$3.812
Each (In a Tube of 10)
units
PIC16F PDIP Through Hole 40 PIC 8bit 8192 words 20MHz 368 B - 2 14 1 2 to 5.5 V
RS Stock No. 122-5444
Mfr. Part No.R5F100GCGFB#30
$4.72
Each (In a Pack of 2)
units
RL78/G13 LFQFP Surface Mount 48 RL78 16bit 4 (Data Flash) kB, 32 (Flash ROM) kB 32MHz 2 kB - - 10 - 2.4 → 5.5 V
RS Stock No. 110-7088
Mfr. Part No.STM32L051K8T6
$4.44
Each (In a Pack of 2)
units
STM32 LQFP Surface Mount 32 ARM Cortex M0+ 32bit 64 kB 32MHz 8 kB - - 10 - 1.65 → 3.6 V
RS Stock No. 165-1938
Mfr. Part No.PIC12F1572-I/P
BrandMicrochip
$0.979
Each (In a Tube of 60)
units
PIC12F PDIP Through Hole 8 PIC 8bit 3.5 kB 16MHz 256 B 1 1 4 - 2.3 → 5.5 V
RS Stock No. 145-9054
Mfr. Part No.PIC16F887-E/P
BrandMicrochip
$4.064
Each (In a Tube of 10)
units
PIC16F PDIP Through Hole 40 PIC 8bit 8.192 kB 20MHz 368 B - 1 14 2 2 → 5.5 V
RS Stock No. 102-3545
Mfr. Part No.STM32F103C8T6
$4.914
Each (In a Tray of 250)
units
STM32F LQFP Surface Mount 48 ARM Cortex M3 32bit 64 kB 72MHz 20 kB 1 x Device 1 10 2 2 → 3.6 V
RS Stock No. 544-1692
Mfr. Part No.PIC12F675-I/P
BrandMicrochip
$2.638
Each (In a Pack of 5)
units
PIC12F PDIP Through Hole 8 PIC 8bit 128 B, 1024 x 14 words 20MHz 64 B - - 4 - 2 to 5.5 V
RS Stock No. 887-7164
Mfr. Part No.PIC12F675-I/P
BrandMicrochip
$2.036
Each (In a Tube of 60)
units
PIC12F PDIP Through Hole 8 PIC 8bit 128 B, 1024 x 14 words 20MHz 64 B - - 4 - 2 to 5.5 V
RS Stock No. 402-279
Mfr. Part No.STM32F103C8T6
$9.49
Each
units
STM32F LQFP Surface Mount 48 ARM Cortex M3 32bit 64 kB 72MHz 20 kB 1 x Device 1 10 2 2 → 3.6 V
RS Stock No. 889-5171
Mfr. Part No.PIC18F46K80-I/PT
BrandMicrochip
$4.73
Each (In a Tray of 160)
units
PIC18F TQFP Surface Mount 44 PIC 8bit 64 kB 64MHz 1.024 kB, 3.648 kB - 2 11 1 3.3 V
RS Stock No. 165-5298
Mfr. Part No.STM32F072CBT6
$4.43
Each (In a Tray of 250)
units
STM32F LQFP Surface Mount 48 ARM 32bit 128 kB 48MHz 16 kB 1 1 13 - 2 → 3.6 V
RS Stock No. 715-4195
Mfr. Part No.PIC18F46K80-I/PT
BrandMicrochip
$6.20
Each
units
PIC18F TQFP Surface Mount 44 PIC 8bit 64 kB 64MHz 1.024 kB, 3.648 kB - 2 11 1 3.3 V
RS Stock No. 165-4738
Mfr. Part No.PIC18F14K50-I/P
BrandMicrochip
$3.728
Each (In a Tube of 22)
units
PIC18F PDIP Through Hole 20 PIC 8bit 16 kB, 256 B 48MHz 768 B 1 x Device 1 11 1 1.8 → 5.5 V
RS Stock No. 823-3832
Mfr. Part No.PIC16F887-E/P
BrandMicrochip
$4.734
Each (In a Pack of 5)
units
PIC16F PDIP Through Hole 40 PIC 8bit 8.192 kB 20MHz 368 B - 1 14 2 2 to 5.5 V
RS Stock No. 880-5392
Mfr. Part No.STM32F072CBT6
$6.506
Each (In a Pack of 5)
units
STM32F LQFP Surface Mount 48 ARM 32bit 128 kB 48MHz 16 kB 1 1 13 - 2 → 3.6 V
RS Stock No. 564-157
Mfr. Part No.PIC18F14K50-I/P
BrandMicrochip
$3.728
Each (In a Pack of 5)
units
PIC18F PDIP Through Hole 20 PIC 8bit 16 kB, 256 B 48MHz 768 B 1 x Device 1 11 1 1.8 to 5.5 V
RS Stock No. 810-7660
Mfr. Part No.STM32F303CBT6
$9.66
Each (In a Pack of 2)
units
STM32F LQFP Surface Mount 48 ARM Cortex M4 32bit 128 kB 72MHz 32 kB 1 2 39 3 2 → 3.6 V
RS Stock No. 889-5351
Mfr. Part No.PIC12F508-I/P
BrandMicrochip
$0.992
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