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. 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. 919-6270
Mfr. Part No.STM32F030R8T6
HK$12.17
Each (In a Tray of 160)
units
STM32F LQFP Surface Mount 64 ARM Cortex M0 32bit 64 kB 48MHz 8 kB - 1 18 2 3.6 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. 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. 757-8471
Mfr. Part No.UPD78F1146AGB-GAH-AX
HK$50.49
Each
units
UPD LFQFP Surface Mount 64 78K0R 16bit 256 kB 20MHz 12 kB - 1 8 - 1.8 → 5.5 V
RS Stock No. 234-0530
Mfr. Part No.PIC16C711-04/P
BrandMicrochip
HK$22.72
Each
units
PIC16C PDIP Through Hole 18 PIC 8bit 1K x 14 words 4MHz 68 B - - 4 - 2.5 to 6 V
RS Stock No. 746-8226
Mfr. Part No.STM32F407VGT6
HK$99.40
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. 165-2087
Mfr. Part No.PIC16LF1455-I/ST
BrandMicrochip
HK$11.94
Each (In a Tube of 96)
units
- - - - - - - - 1.024 kB - - - - -
RS Stock No. 165-5858
Mfr. Part No.STM32F030K6T6
HK$8.246
Each (In a Tray of 250)
units
STM32F LQFP Surface Mount 32 ARM Cortex 32bit 32 kB 48MHz 4 kB - - 12 1 2.4 → 3.6 V
RS Stock No. 177-5011
Mfr. Part No.R5F100LFAFB#V0
HK$23.487
Each (In a Tray of 160)
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. 177-5038
Mfr. Part No.R5F100GDAFB
HK$17.929
Each (In a Tray of 250)
units
RL78/G13 LQFP Surface Mount 48 RL78 16bit 48 kB 32MHz 3 kB - - 10 5 1.6 → 5.5 V
RS Stock No. 919-6315
Mfr. Part No.STM32F429ZIT6
HK$97.231
Each (In a Tray of 60)
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. 792-5934
Mfr. Part No.STM32F030R8T6
HK$16.464
Each (In a Pack of 5)
units
STM32F LQFP Surface Mount 64 ARM Cortex M0 32bit 64 kB 48MHz 8 kB - 1 18 2 3.6 V
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. 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. 876-6717
Mfr. Part No.PIC16F887-I/PT
BrandMicrochip
HK$17.701
Each (In a Tray of 160)
units
PIC16F TQFP Surface Mount 44 PIC 8bit 8192 words 20MHz 368 B - 2 14 1 2 → 5.5 V
RS Stock No. 165-6628
Mfr. Part No.STM32F405VGT6V
HK$108.562
Each (In a Tray of 540)
units
STM32F LQFP Surface Mount 100 ARM Cortex M4 32bit 1.024 MB 168MHz 196 kB 2 x OTG 1 19 3 1.8 → 3.6 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. 666-8393
Mfr. Part No.dsPIC33FJ12MC202-I/SS
BrandMicrochip
HK$27.96
Each
units
DsPIC33F SSOP Surface Mount 28 DsPIC 16bit 12 kB 40MIPS 1 kB - 4 6 1 3 → 3.6 V
RS Stock No. 467-1690
Mfr. Part No.PIC16F877A-I/P
BrandMicrochip
HK$42.78
Each
units
PIC16F PDIP Through Hole 40 PIC 8bit 14.3 kB, 256 B 20MHz 368 B - 2 8 1 4 → 5.5 V
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