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. 169-0180
Mfr. Part No.EFM8BB10F2G-A-QFN20
MYR1.743
Each (In a Tube of 120)
units
EFM8BB QFN Surface Mount 20 CIP-51 8bit 2 kB 25MHz 256 B - - 15 1 2.2 → 3.6 V
RS Stock No. 798-5305
Mfr. Part No.PIC16F1938-I/SO
BrandMicrochip
MYR9.32
Each (In a Pack of 5)
units
PIC16F SOIC Surface Mount 28 PIC 8bit 16384 words 32MHz 1.024 kB 1 1 11 1 2.5 → 3.6 V
RS Stock No. 686-8596
Mfr. Part No.STM32F103ZET6
MYR49.72
Each
units
STM32F LQFP Surface Mount 144 ARM Cortex M3 32bit 512 kB 72MHz 64 kB 1 x Device 2 21 3 2 → 3.6 V
RS Stock No. 166-1153
Mfr. Part No.STM32F446RET6
MYR27.059
Each (In a Tray of 160)
units
STM32 LQFP Surface Mount 64 ARM Cortex M4 32bit 512 kB 180MHz 128 kB 2 - 16 - 1.8 → 3.6 V
RS Stock No. 746-8226
Mfr. Part No.STM32F407VGT6
MYR57.31
Each
units
STM32F LQFP Surface Mount 100 ARM Cortex M4F 32bit 1.024 MB 168MHz 4 kB, 192 kB 1 x Device, 1 x Host, 1 x OTG 1 16 3 1.8 → 3.6 V
RS Stock No. 165-4238
Mfr. Part No.PIC32MX530F128H-I/PT
BrandMicrochip
MYR15.33
Each (In a Tray of 160)
units
PIC32MX TQFP Surface Mount 64 PIC 32bit 128 kB 50MHz 16 kB 1 x OTG 5 28 3 2.3 → 3.6 V
RS Stock No. 786-3915
Mfr. Part No.PIC18F45K50-I/P
BrandMicrochip
MYR13.656
Each (In a Pack of 5)
units
PIC18F PDIP Through Hole 40 PIC 8bit 32 kB 48MHz 2.048 kB 1 2 25 1 2.3 to 5.5 V
RS Stock No. 165-2237
Mfr. Part No.PIC10F206T-I/OT
BrandMicrochip
MYR2.589
Each (On a Reel of 3000)
units
PIC10F SOT-23 Surface Mount 6 PIC 8bit 512 words 4MHz 24 B - - - - 2 → 5.5 V
RS Stock No. 467-1971
Mfr. Part No.PIC18F1320-I/SO
BrandMicrochip
MYR16.82
Each
units
PIC18F SOIC Surface Mount 18 PIC 8bit 8 kB, 256 B 40MHz 256 B - 1 7 - 4.2 → 5.5 V
RS Stock No. 876-7073
Mfr. Part No.PIC18F87J50-I/PT
BrandMicrochip
MYR18.917
Each (In a Tray of 119)
units
PIC18F TQFP Surface Mount 80 PIC 8bit 128 kB 48MHz 3.904 kB 1 x Device 5 12 2 2 → 3.6 V
RS Stock No. 761-7260
Mfr. Part No.PIC24FJ128GA310-I/PT
BrandMicrochip
MYR18.60
Each
units
PIC24FJ TQFP Surface Mount 100 PIC 16bit 128 kB 32MHz 8 kB - 7 24 2 2 → 3.6 V
RS Stock No. 920-6468
Mfr. Part No.STM32F407VGT6
MYR44.471
Each (In a Tray of 90)
units
STM32F LQFP Surface Mount 100 ARM Cortex M4F 32bit 1.024 MB 168MHz 4 kB, 192 kB 1 x Device, 1 x Host, 1 x OTG 1 16 3 1.8 → 3.6 V
RS Stock No. 165-4810
Mfr. Part No.PIC16F877-20/P
BrandMicrochip
MYR34.123
Each (In a Tube of 10)
units
PIC16F PDIP Through Hole 40 PIC 8bit 8K x 14 words, 256 x 8 words 20MHz 368 B - 2 8 1 4 → 5.5 V
RS Stock No. 121-9714
Mfr. Part No.MSP430G2553IN20
MYR11.645
Each (In a Tube of 20)
units
MSP430 PDIP Through Hole 20 MSP430 16bit 16 kB 16MHz 512 B - - 8 2 1.8 → 3.6 V
RS Stock No. 402-190
Mfr. Part No.STM32F101C8T6
MYR17.69
Each
units
STM32F LQFP Surface Mount 48 ARM Cortex M3 32bit 64 kB 36MHz 10 kB - 3 10 2 2 → 3.6 V
RS Stock No. 467-2126
Mfr. Part No.PIC18F452-I/P
BrandMicrochip
MYR36.62
Each
units
PIC18F PDIP Through Hole 40 PIC 8bit 32 kB 40MHz 1.536 kB - 2 8 1 4.2 → 5.5 V
RS Stock No. 111-6471
Mfr. Part No.STM32F769BIT6
MYR72.99
Each
units
STM32 LQFP Surface Mount 208 ARM Cortex M7 32bit 2.048 MB 216MHz 512 kB 2 - 24 - 1.7 → 3.6 V
RS Stock No. 165-4598
Mfr. Part No.PIC24FJ256GB110-I/PT
BrandMicrochip
MYR27.04
Each (In a Tray of 119)
units
PIC24FJ TQFP Surface Mount 100 PIC 16bit 256 kB 32MHz 16 kB 1 x OTG 9 16 3 2 → 3.6 V
RS Stock No. 145-9020
Mfr. Part No.PIC16F1938-I/SO
BrandMicrochip
MYR8.59
Each (In a Tube of 27)
units
PIC16F SOIC Surface Mount 28 PIC 8bit 16384 words 32MHz 1.024 kB 1 1 11 1 2.5 → 3.6 V
RS Stock No. 165-6579
Mfr. Part No.STM32F207ZCT6
MYR33.093
Each (In a Tray of 360)
units
STM32F LQFP Surface Mount 144 ARM Cortex M3 32bit 256 kB 120MHz 128 kB 2 2 24 3 3.6 V