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. 169-0180
Mfr. Part No.EFM8BB10F2G-A-QFN20
MYR1.41
Each (In a Tube of 120)
units
EFM8BB QFN Surface Mount 20 CIP-51 8bit 2 kB 25MHz 256 B 0 - 15 1 2.2 → 3.6 V
RS Stock No. 526-8857
Mfr. Part No.C8051F320-GQ
MYR39.11
Each
units
C8051F LQFP Surface Mount 32 8051 8bit 16 kB 25MHz 2.304 kB 1 x Device 5 17 1 2.7 3.6 V
RS Stock No. 168-9805
Mfr. Part No.C8051F320-GQ
MYR31.002
Each (In a Tray of 250)
units
C8051F LQFP Surface Mount 32 8051 8bit 16 kB 25MHz 2.304 kB 1 x Device 5 17 1 2.7 → 3.6 V
RS Stock No. 169-0183
Mfr. Part No.EFM8BB10F8G-A-QSOP24
MYR2.372
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. 168-9903
Mfr. Part No.C8051F340-GQ
MYR44.592
Each (In a Tray of 250)
units
C8051F TQFP Surface Mount 48 8051 8bit 64 kB 48MHz 4.352 kB 2 2 17 1 2.7 → 5.25 V
RS Stock No. 757-4719
Mfr. Part No.C8051F340-GQ
MYR51.11
Each
units
C8051F TQFP Surface Mount 48 8051 8bit 64 kB 48MHz 4.352 kB 2 2 17 1 2.7 5.25 V
RS Stock No. 168-9899
Mfr. Part No.C8051F040-GQ
MYR63.791
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. 757-0654
Mfr. Part No.C8051F040-GQ
MYR68.95
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. 526-9002
Mfr. Part No.C8051F120-GQ
MYR104.93
Each
units
C8051F TQFP Surface Mount 100 8051 8bit 128 kB 100MHz 8.448 kB 0 6 8 1 3 3.6 V
RS Stock No. 169-0119
Mfr. Part No.EFM32LG360F256G-E-CSP81
MYR25.751
Each (On a Tape of 100)
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. 168-9819
Mfr. Part No.C8051F120-GQ
MYR109.355
Each (In a Tray of 90)
units
C8051F TQFP Surface Mount 100 8051 8bit 128 kB 100MHz 8.448 kB 0 6 8 1 3 → 3.6 V
RS Stock No. 819-6856
Mfr. Part No.C8051F386-GQ
MYR9.742
Each (In a Pack of 5)
units
C8051F TQFP Surface Mount 48 8051 8bit 32 kB 48MHz 2.304 kB 1 1 - 1 3.3 V
RS Stock No. 169-0053
Mfr. Part No.C8051F860-C-GS
MYR3.704
Each (In a Tube of 48)
units
C8051F SOIC Surface Mount 16 CIP-51 8bit 8 kB 25MHz 512 B 0 1 12 1 2.2 → 3.6 V
RS Stock No. 823-1909
Mfr. Part No.C8051F860-C-GS
MYR3.812
Each (In a Pack of 10)
units
C8051F SOIC Surface Mount 16 CIP-51 8bit 8 kB 25MHz 512 B 0 1 12 1 2.2 3.6 V
RS Stock No. 169-0023
Mfr. Part No.C8051F386-GQ
MYR7.86
Each (In a Tray of 250)
units
C8051F TQFP Surface Mount 48 8051 8bit 32 kB 48MHz 2.304 kB 1 1 - 1 3.3 V
RS Stock No. 757-4722
Mfr. Part No.C8051F342-GQ
MYR53.59
Each
units
C8051F LQFP Surface Mount 32 8051 8bit 64 kB 48MHz 4.352 kB 2 2 17 1 2.7 5.25 V
RS Stock No. 168-9904
Mfr. Part No.C8051F342-GQ
MYR43.318
Each (In a Tray of 250)
units
C8051F LQFP Surface Mount 32 8051 8bit 64 kB 48MHz 4.352 kB 2 2 17 1 2.7 → 5.25 V
RS Stock No. 144-9491
Mfr. Part No.EFM8BB31F16I-B-4QFN24
MYR6.131
Each (In a Tube of 91)
units
EFM8BB3 QFN Surface Mount 24 CIP-51 8bit 16 kB 50MHz 2.304 kB 0 1 12 1 2.2 → 3.6 V
RS Stock No. 173-2717
Mfr. Part No.EFM32ZG110F32-QFN24
MYR6.171
Each (On a Reel of 1000)
units
EFM32ZG TQFN Surface Mount 24 ARM Cortex M0+ 32bit 32 kB 24MHz 4 kB 0 2 2 1 1.85 → 3.8 V
RS Stock No. 757-4772
Mfr. Part No.C8051F410-GQ
MYR32.53
Each
units
C8051F LQFP Surface Mount 32 8051 8bit 32 kB 50MHz 2.304 kB 0 2 24 1 2 5.25 V