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. 663-4056
Mfr. Part No.M30260F8BGP
SGD10.96
Each
units
R8C LQFP Surface Mount 48 M16C/26A 16bit 64 kB 24MHz 2 kB - 1 12 - 4.2 → 5.5 V
RS Stock No. 841-7548
Mfr. Part No.PIC32MX170F256B-50I/SP
BrandMicrochip
SGD6.203
Each (In a Pack of 3)
units
PIC32MX SPDIP Through Hole 28 PIC 32bit 64 kB 50MHz 256 kB - 5 10 2 2.3 to 3.6 V
RS Stock No. 818-2674
Mfr. Part No.PIC18F44K22-E/ML
BrandMicrochip
SGD4.067
Each (In a Tube of 45)
units
PIC18F QFN Surface Mount 40 PIC18F 8bit 16 kB 16MHz 768 B - 2 28 2 2.3 → 5.5 V
RS Stock No. 792-5928
Mfr. Part No.STM32F030C6T6
SGD2.488
Each (In a Pack of 5)
units
STM32F LQFP Surface Mount 48 ARM Cortex M0 32bit 32 kB 48MHz 4 kB - 1 12 1 3.6 V
RS Stock No. 170-8951
Mfr. Part No.MK22FX512VMD12
BrandNXP
SGD13.38
Each (In a Tray of 160)
units
Kinetis K2x MAPBGA Surface Mount 144 ARM Cortex M4 32bit 640 kB 120MHz 132 kB 1 4 2 3 1.71 → 3.6 V
RS Stock No. 887-7151
Mfr. Part No.PIC12F683-I/P
BrandMicrochip
SGD2.436
Each (In a Tube of 60)
units
PIC12F PDIP Through Hole 8 PIC 8bit 256 B, 2048 x 14 words 20MHz 128 B - 1 4 - 2 to 5.5 V
RS Stock No. 911-5634
Mfr. Part No.DSPIC33EP256MU806-E/PT
BrandMicrochip
SGD10.29
Each (In a Tray of 160)
units
DSPIC33EP TQFP Surface Mount 64 DsPIC 16bit 280 kB 60MHz 28 kB 1 16 24 4 3 → 3.6 V
RS Stock No. 168-7367
Mfr. Part No.STM8S103F3P6
SGD2.022
Each (In a Tube of 74)
units
STM8S TSSOP Surface Mount 20 STM8 8bit 8 kB, 640 B 16MHz 1 kB - 1 5 1 2.95 → 5.5 V
RS Stock No. 819-0700
Mfr. Part No.PIC18F452-E/PT
BrandMicrochip
SGD13.083
Each (In a Pack of 160)
units
PIC18F PDIP Through Hole 40 PIC18F 8bit 32 kB 40MHz 1.536 kB - 2 8 1 2 → 5.5 V
RS Stock No. 829-0576
Mfr. Part No.PIC32MX170F256B-I/SP
BrandMicrochip
SGD6.445
Each (In a Pack of 2)
units
PIC32MX SPDIP Through Hole 28 PIC 32bit 256 + 3 kB 50MHz 64 kB - 1 10 2 2.3 to 3.6 V
RS Stock No. 400-295
Mfr. Part No.PIC16F716-I/P
BrandMicrochip
SGD2.074
Each (In a Pack of 5)
units
PIC16F PDIP Through Hole 18 PIC 8bit 2048 x 14 words 20MHz 128 B - 1 4 - 2 to 5.5 V
RS Stock No. 887-7142
Mfr. Part No.PIC18F4550-I/P
BrandMicrochip
SGD9.282
Each (In a Tube of 10)
units
PIC18F PDIP Through Hole 40 PIC 8bit 32 kB, 256 B 48MHz 2.048 kB 1 x Device 2 13 1 4.2 to 5.5 V
RS Stock No. 171-1687
Mfr. Part No.P8X32A-D40
SGD11.225
Each (In a Tube of 10)
units
Propeller PDIP Through Hole 40 P8X32A 32bit 64 kB 80MHz 32.768 kB 1 x Device - - - 2.7 → 3.6 V
RS Stock No. 818-2618
Mfr. Part No.PIC18F4320-I/P
BrandMicrochip
SGD9.555
Each (In a Tube of 10)
units
PIC18F PDIP Through Hole 40 PIC18F 8bit 8 kB 40MHz 512 B 1 1 13 1 2 to 5.5 V
RS Stock No. 724-9886
Mfr. Part No.STM8L152C6T6
SGD3.72
Each
units
STM8L LQFP Surface Mount 48 STM8 8bit 1 kB, 32 kB 16MHz 2 kB - 1 25 1 1.8 → 3.6 V
RS Stock No. 823-7812
Mfr. Part No.DSPIC33EP256MU806-E/PT
BrandMicrochip
SGD11.68
Each
units
- TQFP Surface Mount 64 - 16bit 280 kB 60MHz 28 kB 1 16 24 4 3 to 3.6 V
RS Stock No. 405-597
Mfr. Part No.P8X32A-D40
SGD12.42
Each
units
Propeller PDIP Through Hole 40 P8X32A 32bit 64 kB 80MHz 32.768 kB 1 x Device - - - 2.7 → 3.6 V
RS Stock No. 919-6264
Mfr. Part No.STM32F030C6T6
SGD1.691
Each (In a Tray of 250)
units
STM32F LQFP Surface Mount 48 ARM Cortex M0 32bit 32 kB 48MHz 4 kB - 1 12 1 3.6 V
RS Stock No. 166-0890
Mfr. Part No.XC164CS16F40FBBFXQMA1
BrandInfineon
SGD23.634
Each (In a Tray of 540)
units
XC166 TQFP Surface Mount 100 C166S V2 16bit 128 kB 20MHz 2 (DPRAM) kB, 2 (PSRAM) kB, 4 (DSRAM) kB - - 14 - 2.35 → 2.7 (Core) V, 4.4 → 5.5 (I/O) V
RS Stock No. 754-5516
Mfr. Part No.PIC18F8722-I/PT
BrandMicrochip
SGD16.80
Each
units
PIC18F TQFP Surface Mount 80 PIC 8bit 1.024 kB, 128 kB 40MHz 3.936 kB - 5 16 2 4.2 → 5.5 V