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. 876-7118
Mfr. Part No.PIC18F6722-I/PT
BrandMicrochip
TWD362.60
Each (In a Tray of 160)
units
PIC18F TQFP Surface Mount 64 PIC 8bit 128 kB, 1024 B 40MHz 3.936 kB - 5 12 2 4.2 → 5.5 V
RS Stock No. 124-1556
Mfr. Part No.PIC16F18346-I/P
BrandMicrochip
TWD52.20
Each (In a Pack of 5)
units
PIC16 PDIP Surface Mount 20 PIC 8bit 28 kB 32MHz 2 kB - - 17 - 2.3 5.5 V
RS Stock No. 709-2946
Mfr. Part No.MSP430F1122IPW
TWD152.00
Each
units
MSP430 TSSOP Surface Mount 20 MSP430 16bit 4 kB, 256 B 8MHz 256 B - 1 5 1 1.8 3.6 V
RS Stock No. 739-6945
Mfr. Part No.UPD78F0455GB-GAH-AX
TWD172.00
Each
units
UPD78 LQFP Surface Mount 64 78K0 8bit 60 kB 10MHz 3 kB - 2 8 1 1.8 5.5 V
RS Stock No. 165-9774
Mfr. Part No.LPC11U35FHI33/501,
BrandNXP
TWD118.70
Each (In a Tray of 490)
units
LPC11U QFN Surface Mount 33 ARM Cortex M0 32bit 64 kB 50MHz 12 kB 1 - 8 2 3.3 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. 919-6324
Mfr. Part No.STM32F429IIT6
TWD473.90
Each (In a Tray of 40)
units
STM32F LQFP Surface Mount 176 ARM Cortex M4 32bit 2.048 MB 180MHz 256 kB 2 2 24 6 3.6 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. 887-7123
Mfr. Part No.PIC32MX795F512L-80I/PT
BrandMicrochip
TWD272.70
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. 623-0819
Mfr. Part No.PIC18F4520-I/P
BrandMicrochip
TWD174.00
Each
units
PIC18F PDIP Through Hole 40 PIC 8bit 32 kB, 256 B 40MHz 1.536 kB - 2 13 1 4.2 to 5.5 V
RS Stock No. 575-046
Mfr. Part No.PIC24FJ256GB106-I/PT
BrandMicrochip
TWD190.00
Each
units
PIC24FJ TQFP Surface Mount 64 PIC 16bit 256 kB 32MHz 16 kB 1 x OTG 9 16 3 2 3.6 V
RS Stock No. 741-4248
Mfr. Part No.PIC16F1527-I/PT
BrandMicrochip
TWD85.00
Each (In a Pack of 2)
units
PIC16F TQFP Surface Mount 64 PIC 8bit 28 kB 20MHz 1.536 kB - 1 30 2 2.3 5.5 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. 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. 168-7337
Mfr. Part No.STM32F103C6T7A
TWD144.90
Each (In a Tray of 250)
units
STM32F LQFP Surface Mount 48 ARM Cortex M3 32bit 32 kB 72MHz 10 kB 1 x Device 1 10 1 2 → 3.6 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. 818-2579
Mfr. Part No.PIC18F25K80T-I/SS
BrandMicrochip
TWD77.50
Each (On a Reel of 2100)
units
PIC18F SSOP Surface Mount 28 PIC18F 8bit 32 kB 64MHz 3.648 kB - 4 8 1 1.8 → 5.5 V
RS Stock No. 400-867
Mfr. Part No.PIC18F6722-I/PT
BrandMicrochip
TWD363.00
Each
units
PIC18F TQFP Surface Mount 64 PIC 8bit 1.024 kB, 128 kB 40MHz 3.936 kB - 5 12 2 4.2 → 5.5 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. 103-8048
Mfr. Part No.LPC1754FBD80,551
BrandNXP
TWD215.40
Each (In a Tray of 119)
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