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. 761-7513
Mfr. Part No.PIC16F1509-I/SS
BrandMicrochip
HK$9.80
Each (In a Pack of 3)
units
PIC16F SSOP Surface Mount 20 PIC 8bit 8192 words 20MHz 512 B - 4 12 1 2.3 → 5.5 V
RS Stock No. 872-2492
Mfr. Part No.PIC16C711-04/P
BrandMicrochip
HK$20.054
Each (In a Tube of 25)
units
PIC16C PDIP Through Hole 18 PIC 8bit 1K x 14 words 4MHz 68 B - - 4 - 2.5 to 6 V
RS Stock No. 165-5557
Mfr. Part No.STM32F030K6T6TR
HK$7.958
Each (On a Reel of 2400)
units
STM32F LQFP Surface Mount 32 ARM Cortex 32bit 32 kB 48MHz 4 kB - - 12 1 2.4 → 3.6 V
RS Stock No. 792-6053
Mfr. Part No.STM32F429ZIT6
HK$105.78
Each
units
STM32F LQFP Surface Mount 144 ARM Cortex M4 32bit 2.048 MB 180MHz 256 kB 2 2 24 6 3.6 V
RS Stock No. 539-0409
Mfr. Part No.MC68HC908QT1CPE
BrandNXP
HK$19.39
Each
units
M68HC08 PDIP Through Hole 8 HC08 8bit 1.5 kB 32MHz 128 B - 1 - - 2.7 to 5.5 V
RS Stock No. 758-1455
Mfr. Part No.R5F100LFAFB#V0
HK$23.23
Each
units
RL78/G13 LQFP Surface Mount 64 RL78/G13 16bit 96 kB 32MHz 8 kB - 1 12 - 1.6 → 5.5 V
RS Stock No. 168-9643
Mfr. Part No.MC68HC908QT1CPE
BrandNXP
HK$23.923
Each (In a Tube of 50)
units
M68HC08 PDIP Through Hole 8 HC08 8bit 1.5 kB 32MHz 128 B - 1 - - 2.7 → 5.5 V
RS Stock No. 786-4025
Mfr. Part No.PIC16LF1455-I/ST
BrandMicrochip
HK$12.96
Each (In a Pack of 5)
units
PIC16F TSSOP Surface Mount 14 PIC 8bit 14 kB 48MHz 1.024 kB 1 1 5 1 1.8 → 3.6 V
RS Stock No. 889-5976
Mfr. Part No.PIC12F675-E/P
BrandMicrochip
HK$8.76
Each (In a Tube of 60)
units
PIC12F PDIP Through Hole 8 PIC 8bit 128 B, 1024 x 14 words 20MHz 64 B - - 4 - 2 → 5.5 V
RS Stock No. 328-2110
Mfr. Part No.PIC16C55A-04/P
BrandMicrochip
HK$15.85
Each
units
PIC16C PDIP Through Hole 28 PIC 8bit 512 x 12 words 4MHz 24 B - - - - 2.5 → 5.5 V
RS Stock No. 887-7139
Mfr. Part No.PIC16F877A-I/P
BrandMicrochip
HK$42.87
Each (In a Tube of 10)
units
PIC16F PDIP Through Hole 40 PIC 8bit 14.3 kB, 256 B 20MHz 368 B - 2 8 1 4 → 5.5 V
RS Stock No. 165-5270
Mfr. Part No.STM8L151C8T6
HK$16.79
Each (In a Tray of 250)
units
STM8L LQFP Surface Mount 48 STM8 8bit 64 kB 16MHz 4 kB - 1 28 2 1.65 → 3.6 V
RS Stock No. 144-5912
Mfr. Part No.PIC16F18344-I/P
BrandMicrochip
HK$10.28
Each (In a Tube of 22)
units
PIC16F PDIP Through Hole 20 PIC 8bit 7 kB 32MHz 512 B - 1 17 - 2.3 → 5.5 V
RS Stock No. 896-7692
Mfr. Part No.STM32L476RGT6
HK$73.82
Each
units
STM32 LQFP Surface Mount 64 ARM Cortex M4 32bit 1 MB 80MHz 128 kB 1 x OTG 2 16 - 3.6 (Maximum) V
RS Stock No. 467-2132
Mfr. Part No.PIC18F452-I/PT
BrandMicrochip
HK$59.55
Each
units
PIC18F TQFP Surface Mount 44 PIC 8bit 32 kB 40MHz 1.536 kB - 2 8 1 4.2 → 5.5 V
RS Stock No. 865-6263
Mfr. Part No.EFM8BB10F2G-A-QFN20
HK$3.02
Each (In a Pack of 30)
units
EFM8BB QFN Surface Mount 20 CIP-51 8bit 2 kB 25MHz 256 B - - 15 1 2.2 → 3.6 V
RS Stock No. 917-3425
Mfr. Part No.XMC4800E196K2048AAXQMA1
BrandInfineon
HK$186.11
Each
units
XMC4000 LFBGA Surface Mount 196 ARM Cortex M4 32bit 2.048 MB 144MHz 352 kB 1 - 8 - 1.3 V, 3.3 V
RS Stock No. 817-3698
Mfr. Part No.PIC10F220T-I/MC
BrandMicrochip
HK$3.878
Each (On a Reel of 3300)
units
PIC10F DFN Surface Mount 8 PIC10F 8bit 375 B 8MHz 16 B 1 - 2 - 2 → 5.5 V
RS Stock No. 920-6487
Mfr. Part No.STM32F407VET6
HK$71.506
Each (In a Tray of 90)
units
STM32F LQFP Surface Mount 100 ARM Cortex M4F 32bit 512 kB 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. 144-5760
Mfr. Part No.PIC18F452-I/PT
BrandMicrochip
HK$56.40
Each (In a Tray of 160)
units
PIC18F TQFP Surface Mount 44 PIC 8bit 32 kB 40MHz 1.536 kB - 2 8 1 4.2 → 5.5 V