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. 165-5558
Mfr. Part No.STM32F746NGH6
HK$99.636
Each (In a Tray of 160)
units
STM32F TFBGA Surface Mount 216 ARM Cortex M7 32bit 1.024 MB 216MHz 340 kB 2 2 24 - 1.7 3.6 V
RS Stock No. 920-6496
Mfr. Part No.STM8S105K6T6C
HK$10.62
Each (In a Tray of 250)
units
STM8S LQFP Surface Mount 32 STM8 8bit 1.024 kB, 32 kB 16MHz 2 kB - 2 7 1 2.95 5.5 V
RS Stock No. 165-4716
Mfr. Part No.PIC24HJ128GP502-I/SO
BrandMicrochip
HK$39.94
Each (In a Tube of 27)
units
PIC24HJ SOIC Surface Mount 28 PIC 16bit 128 kB 40MIPS 8 kB - 4 10 2 3 3.6 V
RS Stock No. 757-8377
Mfr. Part No.R5F213G6CNSP#U0
HK$31.96
Each
units
R8C LSSOP Surface Mount 24 R8C 16bit 32 kB 20MHz 2.5 kB - 1 8 - 2.7 5.5 V
RS Stock No. 795-6953
Mfr. Part No.STM32F103TBU6
HK$53.92
Each
units
STM32F VFQFPN Surface Mount 36 ARM Cortex M3 32bit 128 kB 72MHz 20 kB 1 1 10 1 3.6 V
RS Stock No. 666-8968
Mfr. Part No.PIC18F2585-I/SO
BrandMicrochip
HK$62.11
Each
units
PIC18F SOIC Surface Mount 28 PIC 8bit 1.024 kB, 48 kB 40MHz 3.328 kB - 1 8 1 4.2 → 5.5 V
RS Stock No. 880-6907
Mfr. Part No.PIC18F4523-I/P
BrandMicrochip
HK$48.60
Each (In a Tube of 10)
units
PIC18F PDIP Through Hole 40 PIC 8bit 32 kB, 256 B 40MHz 1.536 kB - 2 13 1 4.2 to 5.5 V
RS Stock No. 623-0487
Mfr. Part No.PIC16F88-I/P
BrandMicrochip
HK$29.56
Each
units
PIC16F PDIP Through Hole 18 PIC 8bit 7.168 kB, 256 B 20MHz 368 B - 1 7 1 4 5.5 V
RS Stock No. 165-6667
Mfr. Part No.STM32F103TBU6
HK$38.573
Each (In a Tray of 490)
units
STM32F VFQFPN Surface Mount 36 ARM Cortex M3 32bit 128 kB 72MHz 20 kB 1 1 10 1 3.6 V
RS Stock No. 919-6260
Mfr. Part No.STM32F030F4P6
HK$9.05
Each (In a Tube of 74)
units
STM32F TSSOP Surface Mount 20 ARM Cortex M0 32bit 16 kB 48MHz 4 kB - 1 11 1 3.6 V
RS Stock No. 916-3756
Mfr. Part No.PIC16F18325-I/SL
BrandMicrochip
HK$8.222
Each (In a Pack of 10)
units
PIC16F SOIC Surface Mount 14 PIC 8bit 14 kB 32MHz 1.024 kB - 1 11 - 2.3 5.5 V
RS Stock No. 893-8215
Mfr. Part No.PIC18F2423-I/SO
BrandMicrochip
HK$39.27
Each (In a Pack of 2)
units
PIC18F TQFP Surface Mount 28 PIC18F 8bit 16 kB 40MHz 768 B - 2 10 1 2 5.5 V
RS Stock No. 920-6490
Mfr. Part No.STM8S105C6T6
HK$11.652
Each (In a Tray of 250)
units
STM8S LQFP Surface Mount 48 STM8 8bit 1.024 kB, 32 kB 16MHz 2 kB - 2 10 1 2.95 5.5 V
RS Stock No. 715-4123
Mfr. Part No.PIC18F46K22-I/PT
BrandMicrochip
HK$28.76
Each
units
PIC18F TQFP Surface Mount 44 PIC 8bit 64 kB 64MHz 1.024 kB, 3.896 kB - 5 28 2 5.5 V
RS Stock No. 887-7170
Mfr. Part No.PIC16F88-I/P
BrandMicrochip
HK$28.50
Each (In a Tube of 25)
units
PIC16F PDIP Through Hole 18 PIC 8bit 7.168 kB, 256 B 20MHz 368 B - 1 7 1 4 5.5 V
RS Stock No. 159-7536
Mfr. Part No.PIC16F18875-I/P
BrandMicrochip
HK$13.583
Each (In a Tube of 10)
units
PIC16LF PDIP Through Hole 40 PIC16F 8bit 14 kB 32MHz 1.024 kB - 2 35 - 2.3 5.5 V
RS Stock No. 376-035
Mfr. Part No.R5F212CCSNFP
HK$66.99
Each
units
R8C LQFP Surface Mount 80 R8C/2C 16bit 128 kB 20MHz 7.5 kB - 2 20 - 2.2 → 5.5 V
RS Stock No. 476-185
Mfr. Part No.LPC2368FBD100,551
BrandNXP
HK$118.49
Each
units
LPC23 LQFP Surface Mount 100 ARM7TDMI-S 16/32bit 512 kB 72MHz 58 kB 1 x Device 1 6 3 3 3.6 V
RS Stock No. 660-0766
Mfr. Part No.Z84C4206PEG
BrandZilog
HK$85.03
Each
units
Z80 PDIP Through Hole 40 Z8 8bit - 6MHz - - - - 1 4.5 5.5 V
RS Stock No. 110-6617
Mfr. Part No.STM32F411RET6
HK$54.25
Each
units
STM32 LQFP Surface Mount 64 ARM Cortex M4 32bit 512 kB 100MHz 128 kB 1 - 16 - 1.7 3.6 V
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