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. 168-4031
Mfr. Part No.MK20DN64VLH5
BrandNXP
TWD174.20
Each (In a Tray of 160)
units
Kinetis K2x LQFP Surface Mount 64 ARM Cortex M4 32bit 64 kB 50MHz 16 kB 1 1 1 1 1.71 → 3.6 V
RS Stock No. 912-3039
Mfr. Part No.PIC16F1509-E/P
BrandMicrochip
TWD54.80
Each (In a Tube of 22)
units
PIC16F PDIP Through Hole 20 PIC 8bit 8192 words 20MHz 512 B - 4 12 1 2.3 5.5 V
RS Stock No. 165-4851
Mfr. Part No.PIC18LF1320-I/SS
BrandMicrochip
TWD107.90
Each (In a Tube of 67)
units
PIC18F SSOP Surface Mount 20 PIC 8bit 8 kB, 256 B 40MHz 256 B - 1 7 - 2 5.5 V
RS Stock No. 823-3784
Mfr. Part No.PIC16F1938-I/MV
BrandMicrochip
TWD75.40
Each (In a Pack of 5)
units
PIC16F UQFN Surface Mount 28 PIC 8bit 16.354 kB 32MHz 256 B - 2 11 2 1.8 5.5 V
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Mfr. Part No.C8051F300-GM
TWD100.00
Each
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C8051F QFN Surface Mount 11 8051 8bit 8 kB 25MHz 256 B - 3 8 - 2.7 3.6 V
RS Stock No. 821-0933
Mfr. Part No.PIC24HJ128GP506-I/PT
BrandMicrochip
TWD173.50
Each (In a Pack of 160)
units
PIC24HJ TQFP Surface Mount 64 PIC 16bit 128 kB 40MHz 8 kB - 8 18 2 3 3.6 V
RS Stock No. 901-5284
Mfr. Part No.R5F2136CMNFP#V0
TWD200.00
Each (In a Bag of 2)
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R8C / 36M LQFP Surface Mount 64 R8C CPU 16bit 4 (Flash) kB, 128 (ROM) kB 20MHz 10 kB - - 12 - 1.8 5.5 V
RS Stock No. 146-8920
Mfr. Part No.ATMEGA328PB-AN
BrandMicrochip
TWD51.40
Each (In a Pack of 5)
units
ATMEGA TQFP Surface Mount 32 8 bit CPU 8bit 32 kB 20MHz 1 kB - 1 8 2 1.8 → 5.5 V
RS Stock No. 124-0385
Mfr. Part No.R5F104LFAFA#V0
TWD142.00
Each (In a Pack of 2)
units
RL78/G14 LQFP Surface Mount 64 RL78 16bit 96 kB 32MHz 12 kB - - 12 - 1.6 5.5 V
RS Stock No. 170-4269
Mfr. Part No.AT32UC3A1512-AUT
BrandMicrochip
TWD354.00
Each (In a Tray of 90)
units
- - - - - - - - - - - - - -
RS Stock No. 177-2238
Mfr. Part No.PIC32MX110F016B-I/SO
BrandMicrochip
TWD62.80
Each (In a Tube of 27)
units
PIC32 SOIC Surface Mount 28 PIC 32bit 16 kB 50MHz 4 kB - 1 10 2 3.6 (Maximum) V
RS Stock No. 145-9354
Mfr. Part No.PIC16LF1824-I/ST
BrandMicrochip
TWD40.80
Each (In a Tube of 96)
units
PIC16F TSSOP Surface Mount 14 PIC 8bit 4 kwords 32MHz 512 B - 4 8 1 1.8 3.6 V
RS Stock No. 564-163
Mfr. Part No.PIC18F25K20-I/SO
BrandMicrochip
TWD67.40
Each (In a Pack of 5)
units
PIC18F SOIC Surface Mount 28 PIC 8bit 32 kB, 256 B 64MHz 1.536 kB - 2 11 1 1.8 → 3.6 V
RS Stock No. 165-2003
Mfr. Part No.PIC12F615-E/SN
BrandMicrochip
TWD27.10
Each (In a Tube of 100)
units
PIC12F SOIC Surface Mount 8 PIC 8bit 1024 words 20MHz 64 B - 1 4 - 4.5 5.5 V
RS Stock No. 159-7482
Mfr. Part No.PIC32MX250F128B-I/SO
BrandMicrochip
TWD115.20
Each (In a Tube of 27)
units
PIC32MX SOIC Surface Mount 28 PIC 32bit 128 + 3 kB 40MHz 32 kB - 1 6 2 3 3.6 V
RS Stock No. 166-0607
Mfr. Part No.LPC2929FBD144,551
BrandNXP
TWD444.10
Each (In a Tray of 60)
units
LPC29 LQFP Surface Mount 144 ARM968E-S 32bit 768 kB 125MHz 56 kB, 64 kB 1 x Device, 1 x OTG 4 8 3 1.8 V, 3.3 V
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Mfr. Part No.PIC16LF1824-I/SL
BrandMicrochip
TWD40.00
Each
units
PIC16F SOIC Surface Mount 14 PIC 8bit 4 kwords 32MHz 512 B - 4 8 1 1.8 3.6 V
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Mfr. Part No.PIC24FJ128GA202-I/MM
BrandMicrochip
TWD112.80
Each (In a Tube of 61)
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PIC24FJ QFN Surface Mount 28 PIC 16bit 128 kB 32MHz 8 kB - 1 10 3 3.6 (Maximum) V
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Mfr. Part No.PIC16F18456-I/SO
BrandMicrochip
TWD47.50
Each (In a Tube of 27)
units
PIC16F SOIC Surface Mount 28 PIC 8bit 28 kB 32MHz 2.048 kB - 1 24 2 5.5 (Maximum) V
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Mfr. Part No.PIC16F18875-I/P
BrandMicrochip
TWD56.60
Each (In a Pack of 5)
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PIC16LF PDIP Through Hole 40 PIC16F 8bit 14 kB 32MHz 1.024 kB - 2 35 - 2.3 5.5 V