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. 887-7164
Mfr. Part No.PIC12F675-I/P
BrandMicrochip
PHP57.519
Each (In a Tube of 60)
units
PIC12F PDIP Through Hole 8 PIC 8bit 1024 x 14 words, 128 B 20MHz 64 B 0 - 4 0 2 to 5.5 V
RS Stock No. 887-7268
Mfr. Part No.PIC18F4520-I/P
BrandMicrochip
PHP268.294
Each (In a Tube of 10)
units
PIC18F PDIP Through Hole 40 PIC 8bit 32 kB, 256 B 40MHz 1.536 kB 0 2 13 1 4.2 to 5.5 V
RS Stock No. 379-2897
Mfr. Part No.PIC16F84A-04/P
BrandMicrochip
PHP190.20
Each
units
PIC16F PDIP Through Hole 18 PIC 8bit 1024 x 14 words, 64 x 14 words 4MHz 68 B 0 - - 0 4 → 5.5 V
RS Stock No. 902-8167
Mfr. Part No.DF71252N50FPV#Z1
PHP445.45
Each
units
SuperH LFQFP Surface Mount 64 SH-2 32bit 64 kB 50MHz 8 kB 0 0 4 - 5 V
RS Stock No. 544-1692
Mfr. Part No.PIC12F675-I/P
BrandMicrochip
PHP83.918
Each (In a Pack of 5)
units
PIC12F PDIP Through Hole 8 PIC 8bit 1024 x 14 words, 128 B 20MHz 64 B 0 - 4 0 2 to 5.5 V
RS Stock No. 623-0819
Mfr. Part No.PIC18F4520-I/P
BrandMicrochip
PHP312.99
Each
units
PIC18F PDIP Through Hole 40 PIC 8bit 32 kB, 256 B 40MHz 1.536 kB 0 2 13 1 4.2 to 5.5 V
RS Stock No. 144-5743
Mfr. Part No.PIC16F84A-04/P
BrandMicrochip
PHP185.377
Each (In a Tube of 25)
units
PIC16F PDIP Through Hole 18 PIC 8bit 1024 x 14 words, 64 x 14 words 4MHz 68 B 0 - - 0 4 → 5.5 V
RS Stock No. 165-8088
Mfr. Part No.XMC1301T038F0032ABXUMA1
BrandInfineon
PHP72.611
Each (On a Reel of 3000)
units
XMC1000 TSSOP Surface Mount 38 ARM Cortex M0 32bit 32 kB 66.4MHz 16 kB 0 - 16 - 1.8 → 5.5 V
RS Stock No. 165-3433
Mfr. Part No.PIC32MX250F128B-I/SP
BrandMicrochip
PHP199.92
Each (In a Tube of 15)
units
PIC32MX SPDIP Through Hole 28 PIC 32bit 128 kB 40MHz 32 kB 1 x OTG 5 10 2 2.3 → 3.6 V
RS Stock No. 623-0027
Mfr. Part No.PIC10F202-I/P
BrandMicrochip
PHP29.66
Each
units
PIC10F PDIP Through Hole 8 PIC 8bit 512 x 12 words 4MHz 24 B 0 - - 0 2 to 5.5 V
RS Stock No. 912-6772
Mfr. Part No.PIC10F202-I/P
BrandMicrochip
PHP23.581
Each (In a Tube of 60)
units
PIC10F PDIP Through Hole 8 PIC 8bit 512 x 12 words 4MHz 24 B 0 - - 0 2 to 5.5 V
RS Stock No. 768-0836
Mfr. Part No.PIC32MX250F128B-I/SP
BrandMicrochip
PHP196.94
Each
units
PIC32MX SPDIP Through Hole 28 PIC 32bit 128 kB 40MHz 32 kB 1 x OTG 5 10 2 2.3 to 3.6 V
RS Stock No. 914-0084
Mfr. Part No.XMC1301T038F0032ABXUMA1
BrandInfineon
PHP66.872
Each (In a Pack of 5)
units
XMC1000 TSSOP Surface Mount 38 ARM Cortex M0 32bit 32 kB 66.4MHz 16 kB 0 - 16 - 1.8 → 5.5 V
RS Stock No. 905-5214
Mfr. Part No.PIC32MZ2048EFG100-I/PT
BrandMicrochip
PHP589.02
Each
units
PIC32 TQFP Surface Mount 100 MIPS® MicroAptiv™ 32bit 160 (Boot Flash) kB, 2.048 (Flash) MB 200MHz 512 kB 3 1 40 6 3.3 V
RS Stock No. 625-8918
Mfr. Part No.Z84C0008PEG
BrandZilog
PHP259.23
Each
units
Z80 PDIP Through Hole 40 Z8 8bit - 8MHz - 0 - - 0 4.5 → 5.5 V
RS Stock No. 628-1491
Mfr. Part No.ATMEGA32-16PU
BrandMicrochip
PHP417.56
Each
units
ATmega PDIP Through Hole 40 AVR 8bit 1.024 kB, 32 kB 16MHz 2 kB 0 2 8 1 4.5 to 5.5 V
RS Stock No. 144-5891
Mfr. Part No.PIC32MZ2048EFG100-I/PT
BrandMicrochip
PHP537.827
Each (In a Tray of 119)
units
PIC32 TQFP Surface Mount 100 MIPS® MicroAptiv™ 32bit 160 (Boot Flash) kB, 2.048 (Flash) MB 200MHz 512 kB 3 1 40 6 3.3 V
RS Stock No. 876-7158
Mfr. Part No.PIC18F4685-I/P
BrandMicrochip
PHP420.60
Each (In a Tube of 10)
units
PIC18F PDIP Through Hole 40 PIC 8bit 96 kB 40MHz 3.328 kB 0 2 11 1 2 to 5.5 V
RS Stock No. 920-6456
Mfr. Part No.STM32F405RGT6
PHP393.987
Each (In a Tray of 160)
units
STM32F LQFP Surface Mount 64 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. 400-942
Mfr. Part No.PIC18F4685-I/P
BrandMicrochip
PHP421.30
Each
units
PIC18F PDIP Through Hole 40 PIC 8bit 1.024 kB, 96 kB 40MHz 3.328 kB 0 2 11 1 4.2 to 5.5 V
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