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. 887-7120
Mfr. Part No.PIC18F4550-I/PT
BrandMicrochip
SGD9.555
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. 623-0825
Mfr. Part No.PIC18F4550-I/PT
BrandMicrochip
SGD9.56
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. 887-7312
Mfr. Part No.PIC32MX695F512L-80I/PT
BrandMicrochip
SGD12.946
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. 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 - 5 14 1 1.8 to 5.5 V
RS Stock No. 144-9233
Mfr. Part No.PIC16F1937-I/P
BrandMicrochip
SGD3.42
Each (In a Tube of 10)
units
PIC16F PDIP Through Hole 40 PIC 8bit 256 B, 8192 x 14 words 32MHz 512 B - 5 14 1 1.8 → 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 - - - - 2.5 → 5.5 V
RS Stock No. 165-4770
Mfr. Part No.PIC16F876-20/SP
BrandMicrochip
SGD9.755
Each (In a Tube of 15)
units
PIC16F SPDIP Through Hole 28 PIC 8bit 8K x 14 words, 256 x 8 words 20MHz 368 B - 2 5 1 4 → 5.5 V
RS Stock No. 121-4233
Mfr. Part No.PIC16F628A-I/P
BrandMicrochip
SGD3.458
Each (In a Pack of 5)
units
PIC16F628A PDIP Through Hole 18 PIC 8bit 3.5 kB 20MHz 224 B - - - - 3 → 5.5 V
RS Stock No. 539-0184
Mfr. Part No.MC68HC11E1CFNE2
BrandNXP
SGD26.639
Each (In a Tube of 23)
units
M68HC11 PLCC Surface Mount 52 HC11 8bit 512 B 2MHz 512 B - - 8 1 3 → 5.5 V
RS Stock No. 704-7696
Mfr. Part No.PIC32MX695F512L-80I/PT
BrandMicrochip
SGD15.60
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. 467-1606
Mfr. Part No.PIC16F876-20/SP
BrandMicrochip
SGD9.75
Each
units
PIC16F SPDIP Through Hole 28 PIC 8bit 8K x 14 words, 256 x 8 words 20MHz 368 B - 2 5 1 4 → 5.5 V
RS Stock No. 641-2213
Mfr. Part No.DF3069RF25V
SGD32.21
Each
units
H8 PQFP Surface Mount 100 H8/3069RF 16 bit, 32bit 512 kB 25MHz 16 kB - 2 8 - 4.5 → 5.5 V
RS Stock No. 328-2053
Mfr. Part No.PIC16C54C-04I/P
BrandMicrochip
SGD2.70
Each
units
PIC16C PDIP Through Hole 18 PIC 8bit 512 x 12 words 4MHz 25 B - - - - 2.5 → 5.5 V
RS Stock No. 893-8073
Mfr. Part No.PIC16C58B-04/SO
BrandMicrochip
SGD2.88
Each (In a Pack of 5)
units
PIC16C SOIC Surface Mount 18 PIC16C 8bit 3 kB 40MHz 73 B - - - - 2.5 → 5.5 V
RS Stock No. 629-1022
Mfr. Part No.ADUC7026BSTZ62
SGD29.04
Each
units
ADuC7 LQFP Surface Mount 80 ARM7TDMI 16 bit, 32bit 62 kB 44MHz 8 kB - 1 12 1 2.7 → 3.6 V
RS Stock No. 877-2927
Mfr. Part No.STM8L052C6T6
SGD2.656
Each (In a Pack of 5)
units
STM8L LQFP Surface Mount 48 STM8 8bit 32 kB 32MHz 2 kB - 1 25 1 1.8 → 3.6 V
RS Stock No. 165-4194
Mfr. Part No.PIC32MZ0512EFE064-I/PT
BrandMicrochip
SGD11.256
Each (In a Tray of 160)
units
PIC32MZ EF TQFP Surface Mount 64 - 32bit 512 kB 200MHz 128 kB - - 24 - 2.1 → 3.6 V
RS Stock No. 145-9607
Mfr. Part No.STM32F103RCT6
SGD8.734
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. 144-9117
Mfr. Part No.PIC16C54C-04/P
BrandMicrochip
SGD2.496
Each (In a Tube of 25)
units
PIC16C PDIP Through Hole 18 PIC 8bit 512 x 12 words 4MHz 25 B - - - - 2.5 → 5.5 V
RS Stock No. 887-7145
Mfr. Part No.PIC18F4620-I/PT
BrandMicrochip
SGD9.76
Each (In a Tray of 160)
units
PIC18F TQFP Surface Mount 44 PIC 8bit 1.024 kB, 64 kB 40MHz 3.986 kB - 2 13 1 4.2 → 5.5 V