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. 165-4770
Mfr. Part No.PIC16F876-20/SP
BrandMicrochip
SGD7.625
Each (In a Tube of 15)
units
PIC16F SPDIP Through Hole 28 PIC 8bit 256 x 8 words, 8K x 14 words 20MHz 368 B 0 2 5 1 4 → 5.5 V
RS Stock No. 467-1606
Mfr. Part No.PIC16F876-20/SP
BrandMicrochip
SGD8.07
Each
units
PIC16F SPDIP Through Hole 28 PIC 8bit 256 x 8 words, 8K x 14 words 20MHz 368 B 0 2 5 1 4 → 5.5 V
RS Stock No. 121-4233
Mfr. Part No.PIC16F628A-I/P
BrandMicrochip
SGD3.366
Each (In a Pack of 5)
units
PIC16F628A PDIP Through Hole 18 PIC 8bit 3.5 kB 20MHz 224 B 0 0 - - 3 → 5.5 V
RS Stock No. 144-9233
Mfr. Part No.PIC16F1937-I/P
BrandMicrochip
SGD3.234
Each (In a Tube of 10)
units
PIC16F PDIP Through Hole 40 PIC 8bit 256 B, 8192 x 14 words 32MHz 512 B 0 5 14 1 1.8 → 5.5 V
RS Stock No. 328-2053
Mfr. Part No.PIC16C54C-04I/P
BrandMicrochip
SGD2.57
Each
units
PIC16C PDIP Through Hole 18 PIC 8bit 512 x 12 words 4MHz 25 B 0 - - 0 2.5 → 5.5 V
RS Stock No. 144-9118
Mfr. Part No.PIC16C54C-04I/P
BrandMicrochip
SGD2.407
Each (In a Tube of 25)
units
PIC16C PDIP Through Hole 18 PIC 8bit 512 x 12 words 4MHz 25 B 0 - - 0 2.5 → 5.5 V
RS Stock No. 539-0184
Mfr. Part No.MC68HC11E1CFNE2
BrandNXP
SGD22.481
Each (In a Tube of 23)
units
M68HC11 PLCC Surface Mount 52 HC11 8bit 512 B 2MHz 512 B 0 - 8 1 3 → 5.5 V
RS Stock No. 887-7120
Mfr. Part No.PIC18F4550-I/PT
BrandMicrochip
SGD7.667
Each (In a Tray of 160)
units
PIC18F TQFP Surface Mount 44 PIC 8bit 32 kB, 256 B 48MHz 2.048 kB 1 x Device 2 13 1 4.2 → 5.5 V
RS Stock No. 887-7312
Mfr. Part No.PIC32MX695F512L-80I/PT
BrandMicrochip
SGD10.584
Each (In a Tray of 119)
units
PIC32MX TQFP Surface Mount 100 PIC 32bit 12 kB, 512 kB 80MHz 128 kB 1 x Device 5 16 4 2.3 → 3.6 V
RS Stock No. 623-0825
Mfr. Part No.PIC18F4550-I/PT
BrandMicrochip
SGD8.23
Each
units
PIC18F TQFP Surface Mount 44 PIC 8bit 32 kB, 256 B 48MHz 2.048 kB 1 x Device 2 13 1 4.2 → 5.5 V
RS Stock No. 641-2213
Mfr. Part No.DF3069RF25V
SGD21.41
Each
units
H8 PQFP Surface Mount 100 H8/3069RF 16 bit, 32bit 512 kB 25MHz 16 kB 0 2 8 0 4.5 → 5.5 V
RS Stock No. 704-7696
Mfr. Part No.PIC32MX695F512L-80I/PT
BrandMicrochip
SGD12.75
Each
units
PIC32MX TQFP Surface Mount 100 PIC 32bit 12 kB, 512 kB 80MHz 128 kB 1 x Device 5 16 4 2.3 → 3.6 V
RS Stock No. 666-9765
Mfr. Part No.PIC16F1937-I/P
BrandMicrochip
SGD3.565
Each (In a Pack of 2)
units
PIC16F PDIP Through Hole 40 PIC 8bit 256 B, 8192 x 14 words 32MHz 512 B 0 5 14 1 1.8 to 5.5 V
RS Stock No. 911-5814
Mfr. Part No.DSPIC30F6011A-30I/PF
BrandMicrochip
SGD14.29
Each (In a Tray of 90)
units
dsPIC30F TQFP Surface Mount 64 dsPIC 16bit 2.048 kB, 132 kB 30MIPS 6.144 kB 0 8 16 2 2.5 → 5.5 V
RS Stock No. 165-4769
Mfr. Part No.PIC16F73-I/SP
BrandMicrochip
SGD5.27
Each (In a Tube of 15)
units
PIC16F SPDIP Through Hole 28 PIC 8bit 4K x 14 words 20MHz 192 B 0 2 5 1 4 → 5.5 V
RS Stock No. 916-3765
Mfr. Part No.PIC32MZ0512EFE064-I/PT
BrandMicrochip
SGD11.07
Each
units
PIC32MZ EF TQFP Surface Mount 64 - 32bit 512 kB 200MHz 128 kB 0 - 24 - 2.1 → 3.6 V
RS Stock No. 893-8073
Mfr. Part No.PIC16C58B-04/SO
BrandMicrochip
SGD2.858
Each (In a Pack of 5)
units
PIC16C SOIC Surface Mount 18 PIC16C 8bit 3 kB 40MHz 73 B 0 - - 0 2.5 → 5.5 V
RS Stock No. 887-7145
Mfr. Part No.PIC18F4620-I/PT
BrandMicrochip
SGD9.688
Each (In a Tray of 160)
units
PIC18F TQFP Surface Mount 44 PIC 8bit 1.024 kB, 64 kB 40MHz 3.986 kB 0 2 13 1 4.2 → 5.5 V
RS Stock No. 165-5354
Mfr. Part No.STM32F746BGT6
SGD14.661
Each (In a Tray of 360)
units
STM32F LQFP Surface Mount 208 ARM Cortex M7 32bit 1.024 MB 216MHz 340 kB 2 2 24 - 1.7 → 3.6 V
RS Stock No. 168-7368
Mfr. Part No.STM8S103K3T6C
SGD1.499
Each (In a Tray of 250)
units
STM8S LQFP Surface Mount 32 STM8 8bit 8 kB, 640 B 16MHz 1 kB 0 1 4 1 2.95 → 5.5 V