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. 882-0281
Mfr. Part No.STM32F746VGT6
TWD492.00
Each
units
STM32F LQFP Surface Mount 100 ARM Cortex M7 32bit 1.024 MB 216MHz 340 kB 2 2 16 - 1.7 3.6 V
RS Stock No. 792-5925
Mfr. Part No.STM32F030F4P6
TWD39.30
Each (In a Pack of 10)
units
STM32F TSSOP Surface Mount 20 ARM Cortex M0 32bit 16 kB 48MHz 4 kB - 1 11 1 3.6 V
RS Stock No. 819-0735
Mfr. Part No.PIC18F45K80T-I/PT
BrandMicrochip
TWD88.00
Each (On a Reel of 1200)
units
PIC18F TQFP Surface Mount 44 PIC18F 8bit 32 kB 64MHz 3.648 kB 1 4 11 1 1.8 → 5.5 V
RS Stock No. 168-4935
Mfr. Part No.CC1310F128RGZT
TWD155.40
Each (On a Reel of 250)
units
CC13xx VQFN Surface Mount 48 ARM Cortex M3 16bit 128 kB 48MHz 20 kB - - 8 - 1.8 3.8 V
RS Stock No. 715-4606
Mfr. Part No.PIC18F25K80-I/SS
BrandMicrochip
TWD93.00
Each
units
PIC18F SSOP Surface Mount 28 PIC 8bit 32 kB 64MHz 1.024 kB, 3.648 kB - 2 8 1 3.3 V
RS Stock No. 133-0149
Mfr. Part No.CC1310F128RGZT
TWD225.00
Each
units
CC13xx VQFN Surface Mount 48 ARM Cortex M3 16bit 128 kB 48MHz 20 kB - - 8 - 1.8 3.8 V
RS Stock No. 146-3267
Mfr. Part No.PIC32MM0064GPL028-I/SS
BrandMicrochip
TWD43.60
Each (In a Tube of 47)
units
PIC32 SSOP Surface Mount 28 MicroAptiv UC 32 bit 32bit 64 kB 25MHz 8 kB - 1 12 2 2 → 3.6 V
RS Stock No. 889-5351
Mfr. Part No.PIC12F508-I/P
BrandMicrochip
TWD22.30
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
RS Stock No. 121-9240
Mfr. Part No.TMS320F28035PNT
TWD273.00
Each (In a Tray of 119)
units
Piccolo LQFP Surface Mount 80 C28x 32bit 128 kB 60MHz 20 kB - 1 16 2 2.97 to 3.63 V
RS Stock No. 168-9808
Mfr. Part No.C8051F005-GQ
TWD422.00
Each (In a Tray of 160)
units
C8051F TQFP Surface Mount 64 8051 8bit 32 kB 25MHz 2.304 kB - 5 8 1 2.7 → 3.6 V
RS Stock No. 663-4056
Mfr. Part No.M30260F8BGP
TWD251.00
Each
units
R8C LQFP Surface Mount 48 M16C/26A 16bit 64 kB 24MHz 2 kB - 1 12 - 4.2 → 5.5 V
RS Stock No. 724-9640
Mfr. Part No.STM32F103VDT6
TWD262.00
Each
units
STM32F LQFP Surface Mount 100 ARM Cortex M3 32bit 384 kB 72MHz 64 kB 1 x Device 2 16 3 2 3.6 V
RS Stock No. 725-7727
Mfr. Part No.LPC1754FBD80,551
BrandNXP
TWD288.00
Each
units
LPC17 LQFP Surface Mount 80 ARM Cortex M3 32bit 128 kB 100MHz 32 kB 1 x Device, 1 x Host, 1 x OTG 2 6 3 3.3 V
RS Stock No. 698-7013
Mfr. Part No.TMS320F28035PNT
TWD366.00
Each
units
Piccolo LQFP Surface Mount 80 C28x 32bit 128 kB 60MHz 20 kB - 1 16 2 2.97 3.63 V
RS Stock No. 168-9903
Mfr. Part No.C8051F340-GQ
TWD295.90
Each (In a Tray of 250)
units
C8051F TQFP Surface Mount 48 8051 8bit 64 kB 48MHz 4.352 kB 2 2 17 1 2.7 → 5.25 V
RS Stock No. 168-7352
Mfr. Part No.STM32F103VDT6
TWD225.50
Each (In a Tray of 90)
units
STM32F LQFP Surface Mount 100 ARM Cortex M3 32bit 384 kB 72MHz 64 kB 1 x Device 2 16 3 2 → 3.6 V
RS Stock No. 124-1562
Mfr. Part No.PIC32MM0064GPL028-I/SS
BrandMicrochip
TWD48.20
Each (In a Pack of 5)
units
PIC32 SSOP Surface Mount 28 PIC 32bit 64 kB 25MHz 8 kB - - 12 - 2 3.6 V
RS Stock No. 725-7733
Mfr. Part No.LPC1768FBD100,551
BrandNXP
TWD392.00
Each
units
LPC17 LQFP Surface Mount 100 ARM Cortex M3 32bit 512 kB 100MHz 64 kB 1 x Device, 1 x Host, 1 x OTG 2 8 3 3.3 V
RS Stock No. 743-2659
Mfr. Part No.PIC16F1507-I/SS
BrandMicrochip
TWD32.80
Each (In a Pack of 4)
units
PIC16F SSOP Surface Mount 20 PIC 8bit 3.5 kB 20MHz 128 B - 1 12 - 2.3 5.5 V
RS Stock No. 526-8879
Mfr. Part No.C8051F005-GQ
TWD455.00
Each
units
C8051F TQFP Surface Mount 64 8051 8bit 32 kB 25MHz 2.304 kB - 5 8 1 2.7 → 3.6 V