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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Tillv. art.nrPIC18F46K80-E/PT
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PIC18F TQFP Surface Mount 44 PIC 8bit 64 kB 64MHz 3.648 kB - 1, 4 11 1 1.8 → 5.5 V
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Tillv. art.nrSTM32F405RGT6TR
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STM32F LQFP Surface Mount 64 ARM Cortex M4 32bit 1.024 MB 168MHz 192 kB 2 2 16 3 3.6 V
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STM32F LQFP Surface Mount 64 ARM Cortex M4 32bit 1.024 MB 168MHz 192 kB 2 2 16 3 3.6 V
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M68HC11 PLCC Surface Mount 52 HC11 8bit 512 B 2MHz 512 B - - 8 1 3 → 5.5 V
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Tillv. art.nrSTM32F405RGT6
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STM32F LQFP Surface Mount 64 ARM Cortex M4F 32bit 1.024 MB 168MHz 4 kB, 192 kB 1 x Device, 1 x Host, 1 x OTG 1 16 3 1.8 → 3.6 V
RS-artikelnummer 920-6456
Tillv. art.nrSTM32F405RGT6
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STM32F LQFP Surface Mount 64 ARM Cortex M4F 32bit 1.024 MB 168MHz 4 kB, 192 kB 1 x Device, 1 x Host, 1 x OTG 1 16 3 1.8 → 3.6 V
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Tillv. art.nrATMEGA328P-PU
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ATmega PDIP Through Hole 28 AVR 8bit 1 kB, 32 kB 20MHz 2 kB - 3 6 1 1.8 → 5.5 V
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RL78/G12 HWQFN Surface Mount 24 RL78 16bit 2 (Data Flash) kB, 4 (Code Flash) kB 24MHz 512 B - - 11 - 1.8 → 5.5 V
RS-artikelnummer 402-273
Tillv. art.nrSTM32F103CBT6
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58,11 kr
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STM32F LQFP Surface Mount 48 ARM Cortex M3 32bit 128 kB 72MHz 20 kB 1 x Device 1 10 2 2 → 3.6 V
RS-artikelnummer 889-5897
Tillv. art.nrPIC24HJ64GP504-I/PT
VarumärkeMicrochip
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PIC24HJ TQFP Surface Mount 44 PIC 16bit 64 kB 40MIPS 8 kB - 4 13 2 3 → 3.6 V
RS-artikelnummer 144-5726
Tillv. art.nrPIC16C771-I/SO
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PIC16C SOIC Surface Mount 20 PIC 8bit 4K x 14 words 20MHz 256 B - 1 6 1 4 → 5.5 V
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Tillv. art.nrSTM32L151C6U6
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STM32L UFQFPN Surface Mount 48 ARM Cortex M3 32bit 128 kB 32MHz 16 kB 1 1(4 x 16 bit) 14 2 3.6 V
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STM32L UFQFPN Surface Mount 48 ARM Cortex M3 32bit 128 kB 32MHz 16 kB 1 1(4 x 16 bit) 14 2 3.6 V
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Tillv. art.nrMSP430F247TPM
VarumärkeTexas Instruments
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MSP430 LQFP Surface Mount 64 MSP430 16bit 32 kB, 256 B 16MHz 4 kB - 2 8 4 1.8 → 3.6 V
RS-artikelnummer 666-9614
Tillv. art.nrPIC24HJ64GP504-I/PT
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PIC24HJ TQFP Surface Mount 44 PIC 16bit 64 kB 40MIPS 8 kB - 4 13 2 3 → 3.6 V
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VarumärkeTexas Instruments
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MSP430 LQFP Surface Mount 64 MSP430 16bit 32 kB, 256 B 16MHz 4 kB - 2 8 4 1.8 → 3.6 V
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STM32F LQFP Surface Mount 48 ARM Cortex M3 32bit 128 kB 72MHz 20 kB 1 x Device 1 10 2 2 → 3.6 V
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Tillv. art.nrPIC16C771-I/SO
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PIC16C SOIC Surface Mount 20 PIC 8bit 4K x 14 words 20MHz 256 B - 1 6 1 4 → 5.5 V
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Tillv. art.nrATMEGA32-16AU
VarumärkeMicrochip
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ATmega TQFP Surface Mount 44 AVR 8bit 1.024 kB, 32 kB 16MHz 2 kB - 2 8 1 4.5 → 5.5 V
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