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. 168-9818
Mfr. Part No.C8051F020-GQ
HK$157.347
Each (In a Tray of 90)
units
C8051F TQFP Surface Mount 100 8051 8bit 64 kB 25MHz 4.352 kB - 5 8 1 2.7 → 3.6 V
RS Stock No. 887-7182
Mfr. Part No.PIC18F2550-I/SP
BrandMicrochip
HK$46.638
Each (In a Tube of 15)
units
PIC18F SPDIP Through Hole 28 PIC 8bit 32 kB, 256 B 48MHz 2.048 kB 1 x Device 2 10 1 4.2 to 5.5 V
RS Stock No. 165-4782
Mfr. Part No.PIC16C711-20I/P
BrandMicrochip
HK$28.376
Each (In a Tube of 25)
units
PIC16C PDIP Through Hole 18 PIC 8bit 1K x 14 words 20MHz 68 B - - 4 - 2.5 → 6 V
RS Stock No. 476-208
Mfr. Part No.LPC2148FBD64,151
BrandNXP
HK$152.21
Each
units
LPC21 LQFP Surface Mount 64 ARM7TDMI-S 16/32bit 512 kB 60MHz 40 kB 1 x Device 1 14 2 3 → 3.6 V
RS Stock No. 328-3387
Mfr. Part No.PIC16C711-20I/P
BrandMicrochip
HK$28.38
Each
units
PIC16C PDIP Through Hole 18 PIC 8bit 1K x 14 words 20MHz 68 B - - 4 - 2.5 to 6 V
RS Stock No. 887-7325
Mfr. Part No.PIC16F690-I/P
BrandMicrochip
HK$17.37
Each (In a Tube of 22)
units
PIC16F PDIP Through Hole 20 PIC 8bit 256 B, 4096 x 14 words 20MHz 256 B - - 12 1 2 to 5.5 V
RS Stock No. 860-7508
Mfr. Part No.STM32F030K6T6TR
HK$12.608
Each (In a Pack of 5)
units
STM32F LQFP Surface Mount 32 ARM Cortex M0 32bit 32 kB 48MHz 4 kB - 1 12 1 2.4 → 3.6 V
RS Stock No. 467-1690
Mfr. Part No.PIC16F877A-I/P
BrandMicrochip
HK$46.54
Each
units
PIC16F PDIP Through Hole 40 PIC 8bit 14.3 kB, 256 B 20MHz 368 B - 2 8 1 4 → 5.5 V
RS Stock No. 177-5011
Mfr. Part No.R5F100LFAFB#V0
HK$22.979
Each (In a Tray of 160)
units
RL78/G13 LQFP Surface Mount 64 RL78/G13 16bit 96 kB 32MHz 8 kB - 1 12 - 1.6 → 5.5 V
RS Stock No. 165-3450
Mfr. Part No.PIC16F1509-E/SS
BrandMicrochip
HK$9.922
Each (In a Tube of 67)
units
PIC16F SSOP Surface Mount 20 PIC 8bit 8192 words 20MHz 512 B - 4 12 1 2.3 → 5.5 V
RS Stock No. 876-6717
Mfr. Part No.PIC16F887-I/PT
BrandMicrochip
HK$20.363
Each (In a Tray of 160)
units
PIC16F TQFP Surface Mount 44 PIC 8bit 8192 words 20MHz 368 B - 2 14 1 2 → 5.5 V
RS Stock No. 872-2492
Mfr. Part No.PIC16C711-04/P
BrandMicrochip
HK$24.528
Each (In a Tube of 25)
units
PIC16C PDIP Through Hole 18 PIC 8bit 1K x 14 words 4MHz 68 B - - 4 - 2.5 to 6 V
RS Stock No. 178-4910
Mfr. Part No.DSPIC33FJ12MC202-I/SS
BrandMicrochip
HK$25.636
Each (In a Tube of 47)
units
DsPIC33F SSOP Surface Mount 28 DsPIC 16bit 12 kB 40MIPS 1 kB - 4 6 1 3 → 3.6 V
RS Stock No. 165-2087
Mfr. Part No.PIC16LF1455-I/ST
BrandMicrochip
HK$11.94
Each (In a Tube of 96)
units
- - - - - - - - 1.024 kB - - - - -
RS Stock No. 177-5038
Mfr. Part No.R5F100GDAFB
HK$12.075
Each (In a Tray of 250)
units
RL78/G13 LQFP Surface Mount 48 RL78 16bit 48 kB 32MHz 3 kB - - 10 5 1.6 → 5.5 V
RS Stock No. 144-5760
Mfr. Part No.PIC18F452-I/PT
BrandMicrochip
HK$61.347
Each (In a Tray of 160)
units
PIC18F TQFP Surface Mount 44 PIC 8bit 32 kB 40MHz 1.536 kB - 2 8 1 4.2 → 5.5 V
RS Stock No. 919-6315
Mfr. Part No.STM32F429ZIT6
HK$97.231
Each (In a Tray of 60)
units
STM32F LQFP Surface Mount 144 ARM Cortex M4 32bit 2.048 MB 180MHz 256 kB 2 2 24 6 3.6 V
RS Stock No. 829-4644
Mfr. Part No.STM32F030K6T6
HK$11.103
Each (In a Pack of 10)
units
STM32F LQFP Surface Mount 32 ARM Cortex 32bit 32 kB 48MHz 4 kB - - 12 1 2.4 → 3.6 V
RS Stock No. 877-2920
Mfr. Part No.STM8L151C8T6
HK$21.99
Each (In a Pack of 5)
units
STM8L LQFP Surface Mount 48 STM8 8bit 64 kB 16MHz 4 kB - 1 28 2 1.65 → 3.6 V
RS Stock No. 792-5934
Mfr. Part No.STM32F030R8T6
HK$16.398
Each (In a Pack of 5)
units
STM32F LQFP Surface Mount 64 ARM Cortex M0 32bit 64 kB 48MHz 8 kB - 1 18 2 3.6 V
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