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
New
RS Stock No. 189-3873
Mfr. Part No.STM32L051R6T6
HK$23.42
Each (In a Tray of 160)
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STM32L LQFP Surface Mount 64 ARM Cortex M0+ 32bit 32 kB 32MHz 8 kB - - 16 4 1.65 → 3.6 V
RS Stock No. 144-9228
Mfr. Part No.PIC24FJ32GA004-I/ML
BrandMicrochip
HK$22.103
Each (In a Tube of 45)
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PIC24FJ QFN Surface Mount 44 PIC 16bit 32 kB 32MHz 8 kB - 5 13 2 2 → 3.6 V
RS Stock No. 127-6612
Mfr. Part No.AT89C2051-24PU
BrandMicrochip
HK$11.436
Each (In a Pack of 5)
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AT89 PDIP Through Hole 20 8051 8bit 2 kB 24MHz 128 B - - - - 4 → 6 V
RS Stock No. 821-0949
Mfr. Part No.PIC24HJ64GP206-I/PT
BrandMicrochip
HK$32.846
Each (In a Pack of 160)
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PIC24HJ TQFP Surface Mount 64 PIC 16bit 64 kB 40MHz 8 kB - 8 18 2 3 → 3.6 V
RS Stock No. 908-3815
Mfr. Part No.CC2640F128RSMT
HK$37.65
Each
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CC26xx VQFN Surface Mount 32 ARM Cortex M0, ARM Cortex M3 16bit 128 kB 48MHz 20 kB - - 8 - 3.8 (Maximum) V
RS Stock No. 601-6944
Mfr. Part No.M38K09F8LFP
HK$90.83
Each
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740 LQFP Surface Mount 64 38K0 8bit 32 kB 8MHz 2 kB 1 x Device - 8 - 4 → 5.25 V
RS Stock No. 124-2320
Mfr. Part No.LPC1224FBD48/121,1
BrandNXP
HK$21.903
Each (In a Tray of 250)
units
LPC122 LQFP Surface Mount 48 ARM Cortex M0 32bit 32 kB 30MHz 4 kB - - 8 1 3.3 V
RS Stock No. 159-7488
Mfr. Part No.PIC16F1613-I/SL
BrandMicrochip
HK$6.446
Each (In a Tube of 57)
units
PIC16F SOIC Surface Mount 14 PIC 8bit 2048 words 32MHz 256 B - - 8 - 2.3 → 5.5 V
RS Stock No. 131-0300
Mfr. Part No.ATMEGA48P-20AU
BrandMicrochip
HK$16.76
Each (In a Pack of 2)
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ATmega TQFP Surface Mount 32 AVR 8bit 4 kB 20MHz 512 B - 1 8 - 2.7 → 5.5 V
New
RS Stock No. 189-3840
Mfr. Part No.STM32F072RBT6TR
HK$20.227
Each (On a Reel of 1000)
units
STM32F LQFP Surface Mount 64 ARM Cortex M0 32bit 128 kB 48MHz 16 kB 1 - 16 2 2 → 3.6 V
RS Stock No. 145-5847
Mfr. Part No.MSP430G2101IPW14
HK$6.263
Each (In a Tube of 90)
units
MSP430 TSSOP Surface Mount 14 MSP430 16bit 1 kB 16MHz 128 B - - - - 1.8 → 3.6 V
RS Stock No. 789-3363
Mfr. Part No.R5F100LHAFB
HK$34.80
Each
units
RL78/G13 LQFP Surface Mount 64 RL78 16bit 192 kB 32MHz 16 kB - - 12 6 1.6 → 5.5 V
RS Stock No. 819-5406
Mfr. Part No.DSPIC33EP256MU810-E/BG
BrandMicrochip
HK$59.994
Each (In a Pack of 184)
units
DSPIC33EP TFBGA Surface Mount 121 PIC 16bit 280 kB 40MHz 28 kB 1 x OTG 16 32 4 3 → 3.6 V
RS Stock No. 681-1086
Mfr. Part No.PIC16F690-I/ML
BrandMicrochip
HK$16.24
Each
units
PIC16F QFN Surface Mount 20 PIC 8bit 256 B, 4096 x 14 words 20MHz 256 B - - 12 1 2 → 5.5 V
RS Stock No. 703-7661
Mfr. Part No.PIC18F27J53-I/SP
BrandMicrochip
HK$34.18
Each
units
PIC18F SPDIP Through Hole 28 PIC 8bit 128 kB 48MHz 3.8 kB - 10 10 2 2.15 to 3.6 V
RS Stock No. 144-5731
Mfr. Part No.PIC16F18856-I/SO
BrandMicrochip
HK$10.34
Each (In a Tube of 27)
units
PIC16F SOIC Surface Mount 28 PIC 8bit 28 kB 32MHz 2.048 kB - 1 24 - 2.3 → 5.5 V
RS Stock No. 162-8398
Mfr. Part No.TMS320F28034PNT
HK$53.72
Each (In a Tray of 119)
units
Piccolo LQFP Surface Mount 80 C28x 32bit 128 kB 60MHz 20 kB - 1 16 2 3.3 V
RS Stock No. 177-3596
Mfr. Part No.PIC32MZ2048EFM100-I/PT
BrandMicrochip
HK$84.54
Each (In a Tray of 119)
units
PIC32 TQFP Surface Mount 100 MIPS32 32bit 2.048 MB 252MHz 512 kB 1 1 40 6 3.6 (Maximum) V
RS Stock No. 180-7553
Mfr. Part No.PIC16LF18456-I/SO
BrandMicrochip
HK$11.953
Each (In a Tube of 27)
units
PIC16LF SOIC Surface Mount 28 - 8bit 28 kB 32MHz 2.048 kB - 1 24 2 3.6 (Maximum) V
RS Stock No. 829-1245
Mfr. Part No.R5F1017AANA#U0
HK$16.055
Each (In a Pack of 4)
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RL78/G13 HWQFN Surface Mount 24 RL78 16bit 16 kB 32MHz 2 kB - - 6 2 1.6 → 5.5 V
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