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. 399-410
Mfr. Part No.PIC16F887-I/P
BrandMicrochip
SGD3.60
Each (In a Pack of 5)
units
PIC16F PDIP Through Hole 40 PIC 8bit 8192 x 14 words, 256 B 20MHz 368 B 0 2 14 1 2 to 5.5 V
RS Stock No. 887-7151
Mfr. Part No.PIC12F683-I/P
BrandMicrochip
SGD1.989
Each (In a Tube of 60)
units
PIC12F PDIP Through Hole 8 PIC 8bit 2048 x 14 words, 256 B 20MHz 128 B 0 1 4 0 2 to 5.5 V
RS Stock No. 110-7760
Mfr. Part No.XC164CS16F40FBBFXQMA1
BrandInfineon
SGD28.33
Each
units
XC166 TQFP Surface Mount 100 C166S V2 16bit 128 kB 20MHz 2 (DPRAM) kB, 2 (PSRAM) kB, 4 (DSRAM) kB 0 0 14 - 2.35 → 2.7 (Core) V, 4.4 → 5.5 (I/O) V
RS Stock No. 819-0700
Mfr. Part No.PIC18F452-E/PT
BrandMicrochip
SGD11.701
Each (In a Pack of 160)
units
PIC18F PDIP Through Hole 40 PIC18F 8bit 32 kB 40MHz 1.536 kB 0 2 8 1 2 → 5.5 V
RS Stock No. 666-9396
Mfr. Part No.PIC18LF6722-I/PT
BrandMicrochip
SGD16.33
Each
units
PIC18F TQFP Surface Mount 64 PIC 8bit 1.024 kB, 128 kB 40MHz 3.936 kB 0 5 12 2 2 → 5.5 V
RS Stock No. 725-7739
Mfr. Part No.LPC1766FBD100,551
BrandNXP
SGD15.07
Each
units
LPC17 LQFP Surface Mount 100 ARM Cortex M3 32bit 256 kB 100MHz 64 kB 1 x Device, 1 x Host, 1 x OTG 2 8 3 3.3 V
RS Stock No. 919-6264
Mfr. Part No.STM32F030C6T6
SGD1.401
Each (In a Tray of 250)
units
STM32F LQFP Surface Mount 48 ARM Cortex M0 32bit 32 kB 48MHz 4 kB 0 1 12 1 3.6 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 0 5 16 2 4.2 → 5.5 V
RS Stock No. 623-0803
Mfr. Part No.PIC18F4550-I/P
BrandMicrochip
SGD8.27
Each
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. 887-7114
Mfr. Part No.PIC18F8722-I/PT
BrandMicrochip
SGD16.492
Each (In a Tray of 119)
units
PIC18F TQFP Surface Mount 80 PIC 8bit 1.024 kB, 128 kB 40MHz 3.936 kB 0 5 16 2 4.2 → 5.5 V
RS Stock No. 165-4083
Mfr. Part No.PIC32MX170F256B-I/SP
BrandMicrochip
SGD5.243
Each (In a Tube of 15)
units
PIC32MX SPDIP Through Hole 28 PIC 32bit 256 + 3 kB 50MHz 64 kB 0 1 10 2 2.3 → 3.6 V
RS Stock No. 818-2674
Mfr. Part No.PIC18F44K22-E/ML
BrandMicrochip
SGD3.948
Each (In a Tube of 45)
units
PIC18F QFN Surface Mount 40 PIC18F 8bit 16 kB 16MHz 768 B 0 2 28 2 2.3 → 5.5 V
RS Stock No. 840-6493
Mfr. Part No.MK22FX512VMD12
BrandNXP
SGD18.76
Each
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. 400-295
Mfr. Part No.PIC16F716-I/P
BrandMicrochip
SGD1.888
Each (In a Pack of 5)
units
PIC16F PDIP Through Hole 18 PIC 8bit 2048 x 14 words 20MHz 128 B 0 1 4 0 2 to 5.5 V
RS Stock No. 914-3086
Mfr. Part No.TM4C129XNCZADI3
SGD29.33
Each
units
ARM9 NFBGA Surface Mount 212 ARM Cortex M4F 32bit 1.024 MB 120MHz 256 kB 1 1 24 - 3.3 V
RS Stock No. 405-597
Mfr. Part No.P8X32A-D40
SGD11.20
Each
units
Propeller PDIP Through Hole 40 P8X32A 32bit 64 kB 80MHz 32.768 kB 1 x Device - - 0 2.7 → 3.6 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 0 1 25 1 1.8 → 3.6 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 0 5 10 2 2.3 to 3.6 V
RS Stock No. 171-1687
Mfr. Part No.P8X32A-D40
SGD10.114
Each (In a Tube of 10)
units
Propeller PDIP Through Hole 40 P8X32A 32bit 64 kB 80MHz 32.768 kB 1 x Device - - 0 2.7 → 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 → 3.6 V
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