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. 757-0654
Mfr. Part No.C8051F040-GQ
PHP829.93
Each
units
C8051F TQFP Surface Mount 100 8051 8bit 64 kB 25MHz 4.352 kB 0 2 8, 13 1 2.7 3.6 V
RS Stock No. 168-9899
Mfr. Part No.C8051F040-GQ
PHP689.322
Each (In a Tray of 90)
units
C8051F TQFP Surface Mount 100 8051 8bit 64 kB 25MHz 4.352 kB 0 2 8, 13 1 2.7 → 3.6 V
RS Stock No. 168-9902
Mfr. Part No.C8051F342-GM
PHP487.603
Each (In a Tube of 73)
units
C8051F QFN Surface Mount 32 8051 8bit 64 kB 48MHz 4.352 kB 2 2 17 1 2.7 → 5.25 V
RS Stock No. 757-4713
Mfr. Part No.C8051F342-GM
PHP499.58
Each
units
C8051F QFN Surface Mount 32 8051 8bit 64 kB 48MHz 4.352 kB 2 2 17 1 2.7 5.25 V
RS Stock No. 757-4839
Mfr. Part No.C8051F580-IQ
PHP453.79
Each
units
C8051F QFP Surface Mount 48 8051 8bit 128 kB 24MHz 8.448 kB 0 4 32 1 1.8 5.25 V
RS Stock No. 169-0183
Mfr. Part No.EFM8BB10F8G-A-QSOP24
PHP30.458
Each (In a Tube of 56)
units
EFM8BB QSOP Surface Mount 24 CIP-51 8bit 8 kB 25MHz 512 B 0 - 16 1 2.2 → 3.6 V
RS Stock No. 865-6279
Mfr. Part No.EFM8BB10F8G-A-QSOP24
PHP31.369
Each (In a Pack of 20)
units
EFM8BB QSOP Surface Mount 24 CIP-51 8bit 8 kB 25MHz 512 B 0 - 16 1 2.2 3.6 V
RS Stock No. 819-6881
Mfr. Part No.C8051F044-GQ
PHP490.17
Each
units
C8051F TQFP Surface Mount 100 8051 8bit 64 kB 25MHz 4.352 kB 0 1 13 1 3 V
RS Stock No. 169-0025
Mfr. Part No.C8051F044-GQ
PHP812.164
Each (In a Tray of 90)
units
C8051F TQFP Surface Mount 100 8051 8bit 64 kB 25MHz 4.352 kB 0 1 13 1 3 V
RS Stock No. 168-9916
Mfr. Part No.C8051F580-IQ
PHP370.959
Each (In a Tray of 250)
units
C8051F QFP Surface Mount 48 8051 8bit 128 kB 24MHz 8.448 kB 0 4 32 1 1.8 → 5.25 V
RS Stock No. 146-1830
Mfr. Part No.EFM8BB31F64I-B-QSOP24
PHP71.249
Each (In a Tube of 56)
units
EFM8BB3 QSOP Surface Mount 24 - 8bit 64 kB 50MHz 4.352 kB 0 0 13 - 2.2 3.6 V
RS Stock No. 146-1831
Mfr. Part No.EFM8BB31F32G-B-QFP32
PHP54.027
Each (In a Tray of 250)
units
EFM8 QFP Surface Mount 32 - 8bit 32 kB 50MHz 2.304 kB 0 1 20 - 2.2 3.6 V
RS Stock No. 173-2765
Mfr. Part No.EZR32WG230F256R63G-B0
PHP287.61
Each (In a Tray of 260)
units
EZR32WG QFN Surface Mount 64 ARM Cortex M4 32bit 256 kB 48MHz 32 kB 0 1 1 2 1.98 → 3.8 V
RS Stock No. 168-9996
Mfr. Part No.C8051F511-IM
PHP276.291
Each (In a Tube of 50)
units
C8051F QFN Surface Mount 40 8051 8bit 32 kB 50MHz 4.352 kB 0 1 32 1 1.8 → 5.25 V
RS Stock No. 819-6815
Mfr. Part No.C8051F413-GM
PHP289.80
Each (In a Pack of 2)
units
C8051F QFN Surface Mount 28 8051 8bit 16 kB 50MHz 2.304 kB 0 1 20 1 2.15 5.25 V
RS Stock No. 915-8805
Mfr. Part No.EFM8LB10F16E-B-QFP32
PHP66.376
Each (In a Pack of 5)
units
EFM8LB1 QFP Surface Mount 32 CIP-51 8bit 16 kB 72MHz 1.28 kB 0 - 20 - 2.2 3.6 V
RS Stock No. 526-9254
Mfr. Part No.C8051F010-GQ
PHP819.80
Each
units
C8051F TQFP Surface Mount 64 8051 8bit 32 kB 20MHz 256 B 0 5 8 1 2.7 → 3.6 V
RS Stock No. 865-9877
Mfr. Part No.EFM32LG360F256G-E-CSP81
PHP302.647
Each (In a Pack of 3)
units
EFM32LG CSP Surface Mount 81 ARM Cortex M3 32bit 256 kB 48MHz 32 kB 1 x OTG - 4, 8 1 1.98 3.8 V
RS Stock No. 168-9946
Mfr. Part No.SIM3L167-C-GQ
PHP525.916
Each (In a Tray of 119)
units
SiM3 TQFP Surface Mount 80 ARM Cortex M3 32bit 256 kB 50MHz 32 kB 0 1 24 2 1.8 → 3.8 V
RS Stock No. 168-9914
Mfr. Part No.C8051F582-IM
PHP384.30
Each (In a Tube of 73)
units
C8051F QFN Surface Mount 32 8051 8bit 128 kB 24MHz 8.448 kB 0 4 32 1 1.8 → 5.25 V