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. 887-7139
Mfr. Part No.PIC16F877A-I/P
BrandMicrochip
PHP257.795
Each (In a Tube of 10)
units
PIC16F PDIP Through Hole 40 PIC 8bit 14.3 kB, 256 B 20MHz 368 B 0 2 8 1 4 → 5.5 V
RS Stock No. 467-1690
Mfr. Part No.PIC16F877A-I/P
BrandMicrochip
PHP267.75
Each
units
PIC16F PDIP Through Hole 40 PIC 8bit 14.3 kB, 256 B 20MHz 368 B 0 2 8 1 4 → 5.5 V
RS Stock No. 159-6642
Mfr. Part No.PIC24FJ64GB002-I/SP
BrandMicrochip
PHP174.791
Each (In a Tube of 15)
units
PIC24FJ SPDIP Through Hole 28 PIC 16bit 64 kB 32MHz 8 kB 1 x OTG 5 9 2 2 → 3.6 V
RS Stock No. 703-7602
Mfr. Part No.PIC24FJ64GB002-I/SP
BrandMicrochip
PHP176.18
Each
units
PIC24FJ SPDIP Through Hole 28 PIC 16bit 64 kB 32MHz 8 kB 1 x OTG 5 9 2 2 to 3.6 V
RS Stock No. 400-734
Mfr. Part No.PIC24FJ64GA002-I/SP
BrandMicrochip
PHP161.06
Each
units
PIC24FJ SPDIP Through Hole 28 PIC 16bit 64 kB 32MHz 8 kB 0 5 10 2 2 to 3.6 V
RS Stock No. 876-7023
Mfr. Part No.PIC24FJ64GA002-I/SP
BrandMicrochip
PHP148.107
Each (In a Tube of 15)
units
PIC24FJ SPDIP Through Hole 28 PIC 16bit 64 kB 32MHz 8 kB 0 1 10 2 2 to 3.6 V
RS Stock No. 829-0131
Mfr. Part No.PIC24FJ128GB202-I/SP
BrandMicrochip
PHP189.25
Each (In a Pack of 2)
units
PIC24FJ SPDIP Through Hole 28 PIC 16bit 128 kB 32MHz 8 kB 1 1 9 3 2 to 3.6 V
RS Stock No. 165-4090
Mfr. Part No.PIC24FJ128GB202-I/SP
BrandMicrochip
PHP187.758
Each (In a Tube of 15)
units
PIC24FJ SPDIP Through Hole 28 PIC 16bit 128 kB 32MHz 8 kB 1 1 9 3 2 → 3.6 V
RS Stock No. 786-3899
Mfr. Part No.PIC16F527-I/SS
BrandMicrochip
PHP32.176
Each (In a Pack of 10)
units
PIC16F SSOP Surface Mount 20 PIC 8bit 1.5 kB 20MHz 68 B 0 - 8 0 2 → 5.5 V
RS Stock No. 876-6773
Mfr. Part No.PIC16F677-I/SS
BrandMicrochip
PHP65.484
Each (In a Tube of 67)
units
PIC16F SSOP Surface Mount 20 PIC 8bit 2048 words 20MHz 128 B 0 - 12 1 2 → 5.5 V
RS Stock No. 145-9015
Mfr. Part No.PIC16F527-I/SS
BrandMicrochip
PHP29.773
Each (In a Tube of 67)
units
PIC16F SSOP Surface Mount 20 PIC 8bit 1.5 kB 20MHz 68 B 0 - 8 0 2 → 5.5 V
RS Stock No. 400-277
Mfr. Part No.PIC16F677-I/SS
BrandMicrochip
PHP66.348
Each (In a Pack of 5)
units
PIC16F SSOP Surface Mount 20 PIC 8bit 2048 words 20MHz 128 B 0 - 12 1 2 → 5.5 V
RS Stock No. 817-3967
Mfr. Part No.PIC16F677T-I/SS
BrandMicrochip
PHP60.987
Each (On a Reel of 1600)
units
PIC16F SSOP Surface Mount 20 PIC16F 8bit 3.5 kB 20MHz 128 B 1 2 12 1 2 → 5.5 V
RS Stock No. 889-5288
Mfr. Part No.PIC18F458-I/P
BrandMicrochip
PHP345.443
Each (In a Tube of 10)
units
PIC18F PDIP Through Hole 40 PIC 8bit 32 kB, 256 B 40MHz 1.536 kB 0 2 8 1 4.2 → 5.5 V
RS Stock No. 467-2154
Mfr. Part No.PIC18F458-I/P
BrandMicrochip
PHP397.26
Each
units
PIC18F PDIP Through Hole 40 PIC 8bit 32 kB, 256 B 40MHz 1.536 kB 0 2 8 1 4.2 → 5.5 V
RS Stock No. 165-4832
Mfr. Part No.PIC18F45K20-I/P
BrandMicrochip
PHP124.391
Each (In a Tube of 10)
units
- - - - - - - - 1.536 kB - - - - -
RS Stock No. 564-232
Mfr. Part No.PIC18F45K20-I/P
BrandMicrochip
PHP132.508
Each (In a Pack of 5)
units
PIC18F PDIP Through Hole 40 PIC 8bit 32 kB, 256 B 64MHz 1.536 kB 0 2 14 1 1.8 to 3.6 V
RS Stock No. 121-4233
Mfr. Part No.PIC16F628A-I/P
BrandMicrochip
PHP110.45
Each (In a Pack of 5)
units
PIC16F628A PDIP Through Hole 18 PIC 8bit 3.5 kB 20MHz 224 B 0 0 - - 3 → 5.5 V
RS Stock No. 165-4695
Mfr. Part No.PIC16F74-I/P
BrandMicrochip
PHP203.129
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. 467-1375
Mfr. Part No.PIC16F74-I/P
BrandMicrochip
PHP234.49
Each
units
PIC16F PDIP Through Hole 40 PIC 8bit 4K x 14 words 20MHz 192 B 0 2 8 1 4 → 5.5 V