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. 158-0455
Mfr. Part No.ADUC7026BSTZ62
$24.195
Each (In a Tray of 119)
units
ADuC7 LQFP Surface Mount 80 ARM7TDMI 16/32bit 62 kB 44MHz 8 kB - 1 12 1 2.7 → 3.6 V
RS Stock No. 629-1022
Mfr. Part No.ADUC7026BSTZ62
$23.53
Each
units
ADuC7 LQFP Surface Mount 80 ARM7TDMI 16/32bit 62 kB 44MHz 8 kB - 1 12 1 2.7 → 3.6 V
RS Stock No. 157-8512
Mfr. Part No.ADUC812BSZ
$25.091
Each (In a Tray of 96)
units
ADuC8 MQFP Surface Mount 52 8052 8bit 8 kB, 640 B 16MHz 256 B - - 8 1 2.7 → 5.25 V
RS Stock No. 538-5182
Mfr. Part No.ADUC848BSZ62-3
$21.83
Each
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. 538-5132
Mfr. Part No.ADUC847BSZ62-5
$23.28
Each
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. 523-6197
Mfr. Part No.ADUC812BSZ
$25.27
Each
units
ADuC8 MQFP Surface Mount 52 8052 8bit 8 kB, 640 B 16MHz 256 B - - 8 1 2.7 → 5.25 V
RS Stock No. 786-3372
Mfr. Part No.ADUCM360BCPZ128
$21.84
Each
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. 708-9397
Mfr. Part No.ADUC7020BCPZ62
$19.17
Each
units
ADuC7 LFCSP WQ Surface Mount 40 ARM7TDMI 16/32bit 62 kB 44MHz 8 kB - 1 5 1 2.7 → 3.6 V
RS Stock No. 111-2224
Mfr. Part No.ADUC847BSZ62-5
$21.771
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. 912-9967
Mfr. Part No.ADUCM360BCPZ128
$17.667
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. 912-6445
Mfr. Part No.ADUC7020BCPZ62
$15.35
Each (In a Tray of 490)
units
ADuC7 LFCSP WQ Surface Mount 40 ARM7TDMI 16/32bit 62 kB 44MHz 8 kB - 1 5 1 2.7 → 3.6 V
RS Stock No. 159-7707
Mfr. Part No.ADUC842BCPZ62-3
$26.488
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. 912-8930
Mfr. Part No.ADUC824BSZ
$26.408
Each (In a Tray of 96)
units
ADuC8 MQFP Surface Mount 52 8052 8bit 8 kB, 640 B 12.58MHz 256 B - - 2 1 2.7 → 5.25 V
RS Stock No. 629-0978
Mfr. Part No.ADUC832BSZ
$24.69
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. 538-5126
Mfr. Part No.ADUC847BSZ62-3
$23.99
Each
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. 497-1108
Mfr. Part No.ADUC814BRUZ
$15.96
Each
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. 820-8895
Mfr. Part No.ADUC7024BCPZ62I
$15.77
Each
units
ADuC7 LFCSP Surface Mount 64 ARM7TDMI 16/32bit 62 kB 44MHz 8 kB - 1 16 1 3.3 V
RS Stock No. 145-6073
Mfr. Part No.ADUC845BSZ62-5
$33.499
Each (In a Tray of 96)
units
ADuC8 MQFP Surface Mount 52 8051 8bit 62 kB 12.58MHz 2.304 kB - 2 10 1 5 V
RS Stock No. 139-1761
Mfr. Part No.ADUCM3029BCPZ
$15.39
Each
units
ADUCM LFCSP Surface Mount 64 ARM Cortex M3 32bit 256 kB 26MHz 64 kB - - 8 3 3 V
RS Stock No. 160-2923
Mfr. Part No.ADUC7124BCPZ126
$15.767
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