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. 666-9144
Mfr. Part No.PIC18F66J65-I/PT
BrandMicrochip
SGD6.15
Each
units
PIC18F TQFP Surface Mount 64 PIC 8bit 96 kB 41.667MHz 3.808 kB - 5 11 1 2 → 3.6 V
RS Stock No. 165-4882
Mfr. Part No.PIC18F66J65-I/PT
BrandMicrochip
SGD6.599
Each (In a Tray of 160)
units
- - - - - - - - 3.808 kB - - - - -
RS Stock No. 328-3286
Mfr. Part No.PIC16C77-04/P
BrandMicrochip
SGD10.36
Each
units
PIC16C PDIP Through Hole 40 PIC 8bit 8K x 14 words 4MHz 368 B - 2 8 1 4 → 6 V
RS Stock No. 144-9126
Mfr. Part No.PIC16C77-04/P
BrandMicrochip
SGD9.133
Each (In a Tube of 10)
units
PIC16C PDIP Through Hole 40 PIC 8bit 8K x 14 words 4MHz 368 B - 2 8 1 4 → 6 V
RS Stock No. 530-9217
Mfr. Part No.HD64F3052BF25V
SGD24.36
Each
units
H8 PQFP Surface Mount 100 H8/3052B 16/32bit 512 kB 25MHz 8 kB - 1 8 - 4.5 → 5.5 V
RS Stock No. 817-6366
Mfr. Part No.MSP430G2302IN20
SGD1.584
Each (In a Pack of 5)
units
MSP430 PDIP Through Hole 20 MSP430 16bit 4 kB 16MHz 256 B - - 8 1 1.8 → 3.6 V
RS Stock No. 145-1306
Mfr. Part No.MSP430G2302IN20
SGD1.408
Each (In a Tube of 20)
units
MSP430 PDIP Through Hole 20 MSP430 16bit 4 kB 16MHz 256 B - - 8 1 1.8 → 3.6 V
RS Stock No. 723-8873
Mfr. Part No.STM32F100C8T6B
SGD4.52
Each
units
STM32F LQFP Surface Mount 48 ARM Cortex M3 32bit 64 kB 24MHz 8 kB - 7 10 2 2 → 3.6 V
RS Stock No. 165-4695
Mfr. Part No.PIC16F74-I/P
BrandMicrochip
SGD7.00
Each (In a Tube of 10)
units
PIC16F PDIP Through Hole 40 PIC 8bit 4K x 14 words 20MHz 192 B - 2 8 1 4 → 5.5 V
RS Stock No. 467-1375
Mfr. Part No.PIC16F74-I/P
BrandMicrochip
SGD6.45
Each
units
PIC16F PDIP Through Hole 40 PIC 8bit 4K x 14 words 20MHz 192 B - 2 8 1 4 → 5.5 V
RS Stock No. 168-7326
Mfr. Part No.STM32F100C8T6B
SGD4.471
Each (In a Tray of 250)
units
STM32F LQFP Surface Mount 48 ARM Cortex M3 32bit 64 kB 24MHz 8 kB - 7 10 2 2 → 3.6 V
RS Stock No. 124-2972
Mfr. Part No.CY8C5888LTI-LP097
SGD26.99
Each
units
CY8C58LP QFN Surface Mount 68 ARM Cortex M3 32bit 256 kB 80MHz 64 kB 1 - 3 - 1.8 V, 2.5 V, 3.3 V, 5 V
RS Stock No. 752-8417
Mfr. Part No.C515C8EMCAFXQMA1
BrandInfineon
SGD26.43
Each
units
C515C MQFP Surface Mount 80 8051 8bit 64 kB 10MHz 2.25 kB - 4 8 1 4.25 → 5.5 V
RS Stock No. 768-2463
Mfr. Part No.R5F100FEAFP#V0
SGD3.575
Each (In a Pack of 2)
units
RL78/G13 LQFP Surface Mount 44 RL78/G13 16bit 4 kB, 64 kB 32MHz 4 kB - 1 10 - 1.6 → 5.5 V
RS Stock No. 919-8834
Mfr. Part No.C515C8EMCAFXQMA1
BrandInfineon
SGD19.828
Each (In a Tray of 504)
units
C515C MQFP Surface Mount 80 8051 8bit 64 kB 10MHz 2.25 kB - 4 8 1 4.25 → 5.5 V
RS Stock No. 912-2840
Mfr. Part No.PIC24FV32KA302-I/SP
BrandMicrochip
SGD3.946
Each (In a Tube of 15)
units
PIC24FV SPDIP Through Hole 28 PIC 16bit 32 kB 32MHz 2.048 kB, 512 B - 1 13 2 2 to 5.5 V
RS Stock No. 742-1195
Mfr. Part No.PIC24FV32KA302-I/SP
BrandMicrochip
SGD5.42
Each
units
PIC24FV SPDIP Through Hole 28 PIC 16bit 32 kB 32MHz 2.048 kB, 512 B - 1 13 2 2 to 5.5 V
RS Stock No. 145-9090
Mfr. Part No.PIC16F1716-I/SS
BrandMicrochip
SGD1.959
Each (In a Tube of 47)
units
PIC16F SSOP Surface Mount 28 PIC 8bit 8192 words 32MHz 1.024 kB - 2 25 1 2.3 → 5.5 V
RS Stock No. 829-0116
Mfr. Part No.PIC16F1716-I/SS
BrandMicrochip
SGD2.05
Each (In a Pack of 5)
units
PIC16F SSOP Surface Mount 28 PIC 8bit 8192 words 32MHz 1.024 kB - 2 25 1 2.3 → 5.5 V
RS Stock No. 876-6890
Mfr. Part No.PIC18F2523-I/SO
BrandMicrochip
SGD6.123
Each (In a Tube of 27)
units
PIC18F SOIC Surface Mount 28 PIC 8bit 32 kB, 256 B 40MHz 1.536 kB - 2 10 1 4.2 → 5.5 V
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