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. 872-7104
Mfr. Part No.EFM32HG309F64G-A-QFN24
kr 18,126
Each (In a Pack of 5)
Units
EFM32HG QFN Surface Mount 24 ARM Cortex M0+ 32bit 64 kB 25MHz 8 kB 1 3 2 1 1.98 → 3.8 V
RS Stock No. 920-6409
Mfr. Part No.STM32F105VBT6
kr 60,182
Each (In a Tray of 90)
Units
STM32F LQFP Surface Mount 100 ARM Cortex M3 32bit 128 kB 72MHz 64 kB 1 x OTG 1 16 3 2 → 3.6 V
RS Stock No. 176-9712
Mfr. Part No.R7FS5D57A3A01CFB#AA0
kr 65,78
Each
Units
S5D5 LQFP Surface Mount 144 ARM Cortex M4 32bit 512 kB 120MHz 384 kB 1 - 22 2 3.6 (Maximum) V
RS Stock No. 124-3671
Mfr. Part No.R5F10WMDAFB#30
kr 40,08
Each (In a Pack of 2)
Units
RL78 LFQFP Surface Mount 80 RL78 16bit 48 kB 24MHz 2 kB - - 12 - 1.6 → 5.5 V
RS Stock No. 824-8708
Mfr. Part No.PIC16F1827-E/SS
BrandMicrochip
kr 14,556
Each (In a Pack of 5)
Units
PIC16F SSOP Surface Mount 20 PIC 8bit 4k words 32MHz 384 B - 4 12 2 1.8 → 5.5 V
RS Stock No. 754-2510
Mfr. Part No.PIC18F86K22-I/PT
BrandMicrochip
kr 29,43
Each
Units
PIC18F TQFP Surface Mount 80 PIC 8bit 1 kB, 64 kB 64MHz 4 kB - 10 24 2 1.8 → 5.5 V
RS Stock No. 134-5601
Mfr. Part No.PIC18LF66K40-I/PT
BrandMicrochip
kr 15,325
Each (In a Tray of 160)
Units
PIC18 TQFP Surface Mount 64 PIC18 8bit 64 kB 64MHz 3.562 kB - 1 45 2 1.8 → 3.6 V
RS Stock No. 901-5474
Mfr. Part No.UPD78F0034BGC-8BS-A
kr 51,24
Each
Units
78K LQFP Surface Mount 64 78K0 8bit 32 kB 12MHz 1 kB - - 8 - 1.8 → 5.5 V
RS Stock No. 623-0392
Mfr. Part No.PIC16F688-I/P
BrandMicrochip
kr 17,65
Each
Units
PIC16F PDIP Through Hole 14 PIC 8bit 256 B, 4096 x 14 words 20MHz 256 B - - 8 1 2 to 5.5 V
RS Stock No. 168-9383
Mfr. Part No.MC9S08QD4CSC
BrandNXP
kr 17,771
Each (In a Tube of 98)
Units
HCS08 SOIC Surface Mount 8 S08 8bit 4 kB 16MHz 256 B - 2 4 - 2.7 → 5.5 V
RS Stock No. 821-0814
Mfr. Part No.PIC24EP256GU810T-I/BG
BrandMicrochip
kr 57,826
Each (On a Reel of 2200)
Units
PIC24EP TFBGA Surface Mount 121 PIC 16bit 280 kB 60MHz 28 kB 1 1 32 4 3 → 3.6 V
RS Stock No. 122-5448
Mfr. Part No.R5F100GLDNA#U0
kr 70,48
Each
Units
RL78/G13 HWQFN Surface Mount 48 RL78 16bit 8 (Data Flash) kB, 512 (Flash ROM) kB 32MHz 32 kB - - 10 - 1.6 → 5.5 V
RS Stock No. 889-5304
Mfr. Part No.PIC16F676-I/P
BrandMicrochip
kr 13,762
Each (In a Tube of 30)
Units
PIC16F PDIP Through Hole 14 PIC 8bit 128 B, 1024 x 14 words 20MHz 64 B - - 8 - 2 to 5.5 V
RS Stock No. 178-5199
Mfr. Part No.PIC18LF44K22-I/PT
BrandMicrochip
kr 18,788
Each (In a Tray of 160)
Units
PIC18F TQFP Surface Mount 44 PIC 8bit 16 kB 64MHz 256 B, 768 B - 5 28 2 1.8 → 3.6 V
RS Stock No. 133-1733
Mfr. Part No.ATXMEGA384D3-AU
BrandMicrochip
kr 62,61
Each
Units
AVR XMEGA TQFP Surface Mount 64 AVR 8/16bit 384 + 8 kB 32MHz 32 kB - 1 16 - 1.6 → 3.6 V
RS Stock No. 127-6622
Mfr. Part No.AT89C51ED2-SLSUM
BrandMicrochip
kr 63,11
Each
Units
AT89 PLCC Surface Mount 44 8051 8bit 64 kB 40 MHz, 60 MHz 2.048 kB - 1 - - 2.7 → 5.5 V
RS Stock No. 165-4702
Mfr. Part No.PIC16C745-I/SP
BrandMicrochip
kr 35,327
Each (In a Tube of 15)
Units
PIC16C SPDIP Through Hole 28 PIC 8bit 8K x 14 words 24MHz 256 B 1 x Device 2 5 - 4.35 → 5.25 V
RS Stock No. 901-6332
Mfr. Part No.UPD78F0535AGB(S)-GAH-AX
kr 39,23
Each (In a Bag of 2)
Units
78K LFQFP Surface Mount 64 78K0 8bit 60 kB 20MHz 3.072 kB - - 8 - 1.8 → 5.5 V
RS Stock No. 467-2160
Mfr. Part No.PIC18F458-I/PT
BrandMicrochip
kr 76,17
Each
Units
PIC18F TQFP Surface Mount 44 PIC 8bit 32 kB, 256 B 40MHz 1.536 kB - 2 8 1 4.2 → 5.5 V
RS Stock No. 761-7412
Mfr. Part No.PIC32MX250F128D-I/PT
BrandMicrochip
kr 35,69
Each
Units
PIC32MX TQFP Surface Mount 44 PIC 32bit 131 kB 40MHz 32 kB 1 5 13 2 2.3 → 3.6 V
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