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. 165-4882
Mfr. Part No.PIC18F66J65-I/PT
BrandMicrochip
SGD5.65
Each (In a Tray of 160)
units
- - - - - - - - 3.808 kB - - - - -
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 0 5 11 1 2 → 3.6 V
RS Stock No. 144-9126
Mfr. Part No.PIC16C77-04/P
BrandMicrochip
SGD9.00
Each (In a Tube of 10)
units
PIC16C PDIP Through Hole 40 PIC 8bit 8K x 14 words 4MHz 368 B 0 2 8 1 4 → 6 V
RS Stock No. 328-3286
Mfr. Part No.PIC16C77-04/P
BrandMicrochip
SGD9.08
Each
units
PIC16C PDIP Through Hole 40 PIC 8bit 8K x 14 words 4MHz 368 B 0 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 0 1 8 0 4.5 → 5.5 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 0 7 10 2 2 → 3.6 V
RS Stock No. 165-4695
Mfr. Part No.PIC16F74-I/P
BrandMicrochip
SGD6.40
Each (In a Tube of 10)
units
PIC16F PDIP Through Hole 40 PIC 8bit 4K x 14 words 20MHz 192 B 0 2 8 1 4 → 5.5 V
RS Stock No. 168-7326
Mfr. Part No.STM32F100C8T6B
SGD3.46
Each (In a Tray of 250)
units
STM32F LQFP Surface Mount 48 ARM Cortex M3 32bit 64 kB 24MHz 8 kB 0 7 10 2 2 → 3.6 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 0 2 8 1 4 → 5.5 V
New
RS Stock No. 188-5381
Mfr. Part No.CY8C5888LTI-LP097
SGD20.731
Each (In a Tray of 260)
units
CY8C58LP QFN Surface Mount 68 ARM Cortex-M3 32bit 256 kB 67MHz 64 kB 1 - 3 - 1.8 → 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 0 1 10 0 1.6 → 5.5 V
RS Stock No. 124-2972
Mfr. Part No.CY8C5888LTI-LP097
SGD26.03
Each
units
CY8C58LP QFN Surface Mount 68 ARM Cortex M3 32bit 256 kB 80MHz 64 kB 1 0 3 - 1.8 V, 2.5 V, 3.3 V, 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. 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 0 2 10 1 4.2 → 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 0 2 25 1 2.3 → 5.5 V
RS Stock No. 400-514
Mfr. Part No.PIC18F2523-I/SO
BrandMicrochip
SGD7.33
Each
units
PIC18F SOIC Surface Mount 28 PIC 8bit 32 kB, 256 B 40MHz 1.536 kB 0 2 10 1 4.2 → 5.5 V
RS Stock No. 145-9090
Mfr. Part No.PIC16F1716-I/SS
BrandMicrochip
SGD1.91
Each (In a Tube of 47)
units
PIC16F SSOP Surface Mount 28 PIC 8bit 8192 words 32MHz 1.024 kB 0 2 25 1 2.3 → 5.5 V
RS Stock No. 757-8298
Mfr. Part No.R5F563NBDDFB#V0
SGD17.24
Each
units
RX LFQFP Surface Mount 144 RX63N 32bit 1 MB 100MHz 128 kB 2 1 22 3 2.7 → 3.6 V
RS Stock No. 145-6626
Mfr. Part No.MSP430F5132IDA
SGD3.199
Each (In a Tube of 40)
units
MSP430 TSSOP Surface Mount 38 MSP430 16bit 8 kB 25MHz 1 kB 0 - 8 2 1.8 → 3.6 V
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