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. 467-1690
Mfr. Part No.PIC16F877A-I/P
BrandMicrochip
PHP299.00
Each
units
PIC16F PDIP Through Hole 40 PIC 8bit 14.3 kB, 256 B 20MHz 368 B - 2 8 1 4 → 5.5 V
RS Stock No. 887-7139
Mfr. Part No.PIC16F877A-I/P
BrandMicrochip
PHP274.052
Each (In a Tube of 10)
units
PIC16F PDIP Through Hole 40 PIC 8bit 14.3 kB, 256 B 20MHz 368 B - 2 8 1 4 → 5.5 V
RS Stock No. 159-6642
Mfr. Part No.PIC24FJ64GB002-I/SP
BrandMicrochip
PHP216.09
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
PHP222.07
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. 876-7023
Mfr. Part No.PIC24FJ64GA002-I/SP
BrandMicrochip
PHP173.387
Each (In a Tube of 15)
units
PIC24FJ SPDIP Through Hole 28 PIC 16bit 64 kB 32MHz 8 kB - 1 10 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 - 5 10 2 2 to 3.6 V
RS Stock No. 165-4090
Mfr. Part No.PIC24FJ128GB202-I/SP
BrandMicrochip
PHP221.235
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. 829-0131
Mfr. Part No.PIC24FJ128GB202-I/SP
BrandMicrochip
PHP217.02
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. 145-9015
Mfr. Part No.PIC16F527-I/SS
BrandMicrochip
PHP36.459
Each (In a Tube of 67)
units
PIC16F SSOP Surface Mount 20 PIC 8bit 1.5 kB 20MHz 68 B - - 8 - 2 → 5.5 V
RS Stock No. 817-3967
Mfr. Part No.PIC16F677T-I/SS
BrandMicrochip
PHP72.041
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. 876-6773
Mfr. Part No.PIC16F677-I/SS
BrandMicrochip
PHP76.471
Each (In a Tube of 67)
units
PIC16F SSOP Surface Mount 20 PIC 8bit 2048 words 20MHz 128 B - - 12 1 2 → 5.5 V
RS Stock No. 400-277
Mfr. Part No.PIC16F677-I/SS
BrandMicrochip
PHP67.63
Each (In a Pack of 5)
units
PIC16F SSOP Surface Mount 20 PIC 8bit 2048 words 20MHz 128 B - - 12 1 2 → 5.5 V
RS Stock No. 786-3899
Mfr. Part No.PIC16F527-I/SS
BrandMicrochip
PHP37.821
Each (In a Pack of 10)
units
PIC16F SSOP Surface Mount 20 PIC 8bit 1.5 kB 20MHz 68 B - - 8 - 2 → 5.5 V
RS Stock No. 169-8332
Mfr. Part No.Z8F0822SJ020EG
BrandZilog
PHP166.917
Each (In a Tube of 27)
units
Z8 Encore! XP SOIC Surface Mount 28 Z8 8bit 8 kB 20MHz 1 kB - 1 5 1 2.7 → 3.6 V
RS Stock No. 660-0805
Mfr. Part No.Z8F0822SJ020EG
BrandZilog
PHP191.91
Each
units
Z8 Encore! XP SOIC Surface Mount 28 Z8 8bit 8 kB 20MHz 1 kB - 1 5 1 2.7 → 3.6 V
RS Stock No. 467-2154
Mfr. Part No.PIC18F458-I/P
BrandMicrochip
PHP465.82
Each
units
PIC18F PDIP Through Hole 40 PIC 8bit 32 kB, 256 B 40MHz 1.536 kB - 2 8 1 4.2 → 5.5 V
RS Stock No. 564-232
Mfr. Part No.PIC18F45K20-I/P
BrandMicrochip
PHP145.604
Each (In a Pack of 5)
units
PIC18F PDIP Through Hole 40 PIC 8bit 32 kB, 256 B 64MHz 1.536 kB - 2 14 1 1.8 to 3.6 V
RS Stock No. 165-4832
Mfr. Part No.PIC18F45K20-I/P
BrandMicrochip
PHP145.604
Each (In a Tube of 10)
units
- - - - - - - - 1.536 kB - - - - -
RS Stock No. 889-5288
Mfr. Part No.PIC18F458-I/P
BrandMicrochip
PHP366.917
Each (In a Tube of 10)
units
PIC18F PDIP Through Hole 40 PIC 8bit 32 kB, 256 B 40MHz 1.536 kB - 2 8 1 4.2 → 5.5 V
RS Stock No. 121-4233
Mfr. Part No.PIC16F628A-I/P
BrandMicrochip
PHP130.042
Each (In a Pack of 5)
units
PIC16F628A PDIP Through Hole 18 PIC 8bit 3.5 kB 20MHz 224 B - - - - 3 → 5.5 V