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. 876-7026
Mfr. Part No.PIC18F2553-I/SP
BrandMicrochip
PHP290.989
Each (In a Tube of 15)
units
PIC18F SPDIP Through Hole 28 PIC 8bit 32 kB 48MHz 2.048 kB 0 2 10 1 2 to 5.5 V
New
RS Stock No. 190-6875
Mfr. Part No.ATSAML11E15A-AFKPH
BrandMicrochip
PHP154.00
Each (In a Pack of 5)
units
SAM L11 TQFP Surface Mount 32 - 32bit 32 kB 32kHz 8 kB - - 10 3 1.62 → 3.63 V
RS Stock No. 121-9719
Mfr. Part No.TMS320F28032PAGT
PHP299.319
Each (In a Tray of 160)
units
Piccolo TQFP Surface Mount 64 C28x 32bit 64 kB 60MHz 20 kB 0 1 14 1 3.3 V
RS Stock No. 124-0423
Mfr. Part No.R5F111PGAFB#30
PHP294.245
Each (In a Pack of 2)
units
RL78/L1C LFQFP Surface Mount 100 RL78 16bit 128 kB 24MHz 12 kB 0 0 13 - 1.6 → 3.6 V
RS Stock No. 169-0031
Mfr. Part No.C8051F132-GQ
PHP709.40
Each (In a Tray of 90)
units
C8051F TQFP Surface Mount 100 8051 8bit 64 kB 100MHz 8.448 kB 0 1 8 1 3.3 V
RS Stock No. 171-7766
Mfr. Part No.PIC16F15324-I/P
BrandMicrochip
PHP42.933
Each (In a Tube of 30)
units
PIC16F PDIP Through Hole 14 PIC 8bit 7 kB 32MHz 512 kB 0 1 11 1 5.5 V
RS Stock No. 146-3227
Mfr. Part No.ATTINY1616-SFR
BrandMicrochip
PHP44.171
Each (On a Reel of 1500)
units
ATTINY SOIC Surface Mount 20 AVR 8bit 16 kB 20MHz 2.048 kB 0 1 20 1 1.8 → 5.5 V
RS Stock No. 166-0890
Mfr. Part No.XC164CS16F40FBBFXQMA1
BrandInfineon
PHP988.328
Each (In a Tray of 540)
units
XC166 TQFP Surface Mount 100 C166S V2 16bit 128 kB 20MHz 2 (DPRAM) kB, 2 (PSRAM) kB, 4 (DSRAM) kB 0 0 14 - 2.35 → 2.7 (Core) V, 4.4 → 5.5 (I/O) V
RS Stock No. 821-1071
Mfr. Part No.PIC32MX764F128H-I/PT
BrandMicrochip
PHP209.437
Each (In a Pack of 160)
units
PIC32MX TQFP Surface Mount 64 PIC 32bit 128 kB 80MHz 32 kB 1 2 16 3 2.3 → 3.6 V
RS Stock No. 880-5399
Mfr. Part No.STM32F427VIT6
PHP630.43
Each
units
STM32F LQFP Surface Mount 100 ARM Cortex M4 32bit 2.048 MB 180MHz 256 (System) kB, 4 (Backup) kB 1 2 16 - 1.7 → 3.6 V
RS Stock No. 919-6318
Mfr. Part No.STM32F429VIT6
PHP607.68
Each (In a Tray of 90)
units
STM32F LQFP Surface Mount 100 ARM Cortex M4 32bit 2.048 MB 180MHz 256 kB 2 2 16 6 3.6 V
RS Stock No. 889-5190
Mfr. Part No.PIC24FV32KA302-I/SS
BrandMicrochip
PHP132.571
Each (In a Tube of 47)
units
PIC24FV SSOP Surface Mount 28 PIC 16bit 32 kB 32MHz 2.048 kB, 512 B - 1 13 2 2 → 5.5 V
RS Stock No. 840-6355
Mfr. Part No.MK10DX32VFT5
BrandNXP
PHP153.365
Each (In a Pack of 2)
units
Kinetis K1x QFN Surface Mount 48 ARM Cortex M4 32bit 64 kB 50MHz 10 kB 0 2 1 1 1.71 → 3.6 V
RS Stock No. 126-2134
Mfr. Part No.PIC18F66K40-I/MR
BrandMicrochip
PHP109.288
Each (In a Pack of 5)
units
PIC18F QFN Surface Mount 64 PIC18 8bit 64 kB 64MHz 3.562 kB 0 1 45 - 2.3 → 5.5 V
RS Stock No. 127-8254
Mfr. Part No.ATMEGA165P-16AU
BrandMicrochip
PHP222.42
Each
units
ATmega TQFP Surface Mount 64 AVR 8bit 16 kB 16MHz 1 kB 0 1 8 - 2.7 → 5.5 V
RS Stock No. 177-3572
Mfr. Part No.PIC24EP256MC204-I/PT
BrandMicrochip
PHP162.063
Each (In a Tray of 160)
units
PIC24E TQFP Surface Mount 44 PIC 16bit 256 kB 60MHz 32 kB - 1 9 2 3.6 (Maximum) V
RS Stock No. 165-4646
Mfr. Part No.PIC18F6628-I/PT
BrandMicrochip
PHP598.891
Each (In a Tray of 160)
units
- - - - - - - - 3.936 kB - - - - -
RS Stock No. 124-0452
Mfr. Part No.R5F52315ADFM#30
PHP242.25
Each
units
RX231 LFQFP Surface Mount 64 RXv2 CPU 32bit 128 kB 54MHz 32 kB 1 0 12 - 1.8 → 5.5 V
RS Stock No. 823-8008
Mfr. Part No.PIC12F675-E/SN
BrandMicrochip
PHP61.83
Each (In a Pack of 5)
units
PIC12F SOIC Surface Mount 8 PIC 8bit 1024 words 20MHz 64 B 0 0 4 0 2 → 5.5 V
RS Stock No. 817-3682
Mfr. Part No.PIC10F202T-I/MC
BrandMicrochip
PHP23.636
Each (On a Reel of 3300)
units
PIC10F DFN Surface Mount 8 PIC10F 8bit 750 B 4MHz 24 B 0 - - 0 2 → 5.5 V
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