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. 111-2250
Mfr. Part No.ADUC832BSZ
HK$131.796
Each (In a Tray of 96)
units
ADuC8 MQFP Surface Mount 52 8052 8bit 4 kB, 62 kB 16.78MHz 2.304 kB - 2 8 1 2.7 → 5.5 V
RS Stock No. 161-0578
Mfr. Part No.ADUC814ARUZ
HK$66.593
Each (In a Tube of 50)
units
ADuC8 TSSOP Surface Mount 28 8052 8bit 8 kB, 640 B 16.78MHz 256 B - - 6 1 2.7 → 5.5 V
RS Stock No. 160-4534
Mfr. Part No.ADUC845BCPZ62-5
HK$179.703
Each (In a Tray of 260)
units
ADuC8 LFCSP Surface Mount 56 8051 8bit 62 kB 12.58MHz 2.304 kB - 1 10 1 3 V, 5 V
RS Stock No. 160-4987
Mfr. Part No.ADUC7126BSTZ126
HK$84.12
Each (In a Tray of 119)
units
ADuC7 LQFP Surface Mount 80 ARM7TDMI 16/32bit 126 kB 41.78MHz 32 kB - 1 16 1 3.3 V
RS Stock No. 820-9731
Mfr. Part No.ADUC7060BCPZ32
HK$70.93
Each
units
ADuC7 LFCSP Surface Mount 48 ARM7TDMI 16/32bit 32 kB 10.24MHz 4 kB - 1 4 1 2.5 V
RS Stock No. 160-2923
Mfr. Part No.ADUC7124BCPZ126
HK$84.579
Each (In a Tray of 260)
units
ADuC7 LFCSP Surface Mount 64 ARM7TDMI 16/32bit 126 kB 41.78MHz 32 kB - 1 16 1 3.3 V
RS Stock No. 161-0580
Mfr. Part No.ADUC814BRUZ
HK$77.762
Each (In a Tube of 50)
units
ADuC8 TSSOP Surface Mount 28 8052 8bit 8 kB, 640 B 16.78MHz 256 B - - 6 1 2.7 → 5.5 V
RS Stock No. 629-0978
Mfr. Part No.ADUC832BSZ
HK$154.55
Each
units
ADuC8 MQFP Surface Mount 52 8052 8bit 4 kB, 62 kB 16.78MHz 2.304 kB - 2 8 1 2.7 → 5.5 V
RS Stock No. 139-1761
Mfr. Part No.ADUCM3029BCPZ
HK$66.09
Each
units
ADUCM LFCSP Surface Mount 64 ARM Cortex M3 32bit 256 kB 26MHz 64 kB - - 8 3 3 V
RS Stock No. 759-1897
Mfr. Part No.ADUC842BCPZ62-3
HK$133.36
Each
units
ADuC8 LFCSP Surface Mount 56 8052 8bit 62 kB 20MHz 2.304 kB - 2 8 1 3 V
RS Stock No. 708-9404
Mfr. Part No.ADUC7024BSTZ62
HK$109.78
Each
units
ADuC7 LQFP Surface Mount 64 ARM7TDMI 16/32bit 62 kB 44MHz 8 kB - 1 10 1 2.7 → 3.6 V
RS Stock No. 159-7707
Mfr. Part No.ADUC842BCPZ62-3
HK$142.095
Each (In a Tray of 260)
units
ADuC8 LFCSP Surface Mount 56 8052 8bit 62 kB 20MHz 2.304 kB - 2 8 1 3 V
RS Stock No. 629-0984
Mfr. Part No.ADUC834BSZ
HK$194.17
Each
units
ADuC8 MQFP Surface Mount 52 8052 8bit 4 kB, 62 kB 12.58MHz 2.304 MB - 2 4 1 2.7 → 5.25 V
RS Stock No. 158-0168
Mfr. Part No.ADUC847BSZ62-3
HK$132.38
Each (In a Tray of 96)
units
ADuC8 MQFP Surface Mount 52 8052 8bit 4 kB, 62 kB 12.58MHz 2.304 kB - 1 10 1 2.7 → 5.25 V
RS Stock No. 160-4537
Mfr. Part No.ADUC7061BCPZ32
HK$48.95
Each (In a Tray of 490)
units
ADuC7 LFCSP Surface Mount 32 ARM7TDMI 16 bit, 32 bit 32 kB 10.24MHz 4 kB - 1 4 1 2.5 V
RS Stock No. 629-0962
Mfr. Part No.ADUC831BSZ
HK$149.73
Each
units
ADuC8 MQFP Surface Mount 52 8052 8bit 4 kB, 62 kB 16MHz 2.304 kB - 2 8 1 2.7 → 5.5 V
RS Stock No. 497-2397
Mfr. Part No.ADUC816BSZ
HK$146.38
Each
units
ADuC8 MQFP Surface Mount 52 8052 8bit 8 kB, 640 B 12.58MHz 256 B - - 1 1 2.7 → 5.25 V
RS Stock No. 912-9970
Mfr. Part No.ADUCM361BCPZ128
HK$74.701
Each (In a Tray of 260)
units
ADUCM LFCSP Surface Mount 48 ARM Cortex M3 32bit 128 kB 16MHz 8 kB 1 1 - 2 1.8 → 3.6 V
RS Stock No. 111-2224
Mfr. Part No.ADUC847BSZ62-5
HK$132.38
Each (In a Tray of 96)
units
ADuC8 MQFP Surface Mount 52 8052 8bit 4 kB, 62 kB 12.58MHz 2.304 kB - 1 10 1 2.7 → 5.25 V
RS Stock No. 160-9843
Mfr. Part No.ADUC7060BCPZ32
HK$62.98
Each (In a Tray of 260)
units
ADuC7 LFCSP Surface Mount 48 ARM7TDMI 16/32bit 32 kB 10.24MHz 4 kB - 1 4 1 2.5 V