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. 914-0087
Mfr. Part No.XMC1302T038X0064AAXUMA1
BrandInfineon
HK$21.862
Each (In a Pack of 5)
units
XMC1000 TSSOP Surface Mount 38 ARM Cortex M0 32bit 64 kB 66.4MHz 16 kB - - 16 - 1.8 → 5.5 V
RS Stock No. 817-3948
Mfr. Part No.PIC16F1947T-I/MR
BrandMicrochip
HK$18.786
Each (On a Reel of 3300)
units
PIC16F QFN Surface Mount 64 PIC16F 8bit 28 kB 32MHz 1.024 kB 1 2 17 2 1.8 → 5.5 V
RS Stock No. 623-0724
Mfr. Part No.PIC18F2550-I/SP
BrandMicrochip
HK$37.76
Each
units
PIC18F SPDIP Through Hole 28 PIC 8bit 32 kB, 256 B 48MHz 2.048 kB 1 x Device 2 10 1 4.2 to 5.5 V
RS Stock No. 887-7182
Mfr. Part No.PIC18F2550-I/SP
BrandMicrochip
HK$34.113
Each (In a Tube of 15)
units
PIC18F SPDIP Through Hole 28 PIC 8bit 32 kB, 256 B 48MHz 2.048 kB 1 x Device 2 10 1 4.2 to 5.5 V
RS Stock No. 755-9354
Mfr. Part No.PIC24EP512GU810-I/PT
BrandMicrochip
HK$73.42
Each
units
PIC24EP TQFP Surface Mount 100 PIC 16bit 536 kB 70MHz 52 kB 1 - 32 4 3 → 3.6 V
RS Stock No. 178-4890
Mfr. Part No.PIC16F1947-I/MR
BrandMicrochip
HK$20.79
Each (In a Tube of 40)
units
PIC16F QFN Surface Mount 64 PIC 8bit 28 kB 32MHz 1.024 kB, 256 B - 5 17 2 1.8 → 5.5 V
RS Stock No. 168-9818
Mfr. Part No.C8051F020-GQ
HK$157.347
Each (In a Tray of 90)
units
C8051F TQFP Surface Mount 100 8051 8bit 64 kB 25MHz 4.352 kB - 5 8 1 2.7 → 3.6 V
RS Stock No. 889-5843
Mfr. Part No.PIC24EP512GU810-I/PT
BrandMicrochip
HK$60.99
Each (In a Tray of 119)
units
PIC24EP TQFP Surface Mount 100 PIC 16bit 536 kB 70MHz 52 kB 1 - 32 4 3 → 3.6 V
RS Stock No. 400-295
Mfr. Part No.PIC16F716-I/P
BrandMicrochip
HK$9.944
Each (In a Pack of 5)
units
PIC16F PDIP Through Hole 18 PIC 8bit 2048 x 14 words 20MHz 128 B - 1 4 - 2 to 5.5 V
RS Stock No. 876-6786
Mfr. Part No.PIC16F716-I/P
BrandMicrochip
HK$9.281
Each (In a Tube of 25)
units
PIC16F PDIP Through Hole 18 PIC 8bit 3.5 kB 20MHz 128 B - 1 4 - 2 to 5.5 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. 829-4644
Mfr. Part No.STM32F030K6T6
HK$10.104
Each (In a Pack of 10)
units
STM32F LQFP Surface Mount 32 ARM Cortex 32bit 32 kB 48MHz 4 kB - - 12 1 2.4 → 3.6 V
RS Stock No. 818-2567
Mfr. Part No.PIC18F25K80-E/SS
BrandMicrochip
HK$20.581
Each (In a Tube of 47)
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. 165-3450
Mfr. Part No.PIC16F1509-E/SS
BrandMicrochip
HK$9.922
Each (In a Tube of 67)
units
PIC16F SSOP Surface Mount 20 PIC 8bit 8192 words 20MHz 512 B - 4 12 1 2.3 → 5.5 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. 178-4910
Mfr. Part No.DSPIC33FJ12MC202-I/SS
BrandMicrochip
HK$25.636
Each (In a Tube of 47)
units
DsPIC33F SSOP Surface Mount 28 DsPIC 16bit 12 kB 40MIPS 1 kB - 4 6 1 3 → 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. 916-3759
Mfr. Part No.PIC16F18344-I/P
BrandMicrochip
HK$11.01
Each (In a Pack of 5)
units
PIC16F PDIP Through Hole 20 PIC 8bit 7 kB 32MHz 512 B - 1 17 - 2.3 → 5.5 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. 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
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