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. 191-4243
Mfr. Part No.DS87C530-QCL+
SGD64.087
Each (In a Tube of 23)
units
DS87C530 PLCC Surface Mount 52 8051 8bit 16 kB 33MHz 1 kB - - - - 5 V
New
RS Stock No. 214-9211
Mfr. Part No.MAX78000EXG+
SGD18.061
Each (In a Tray of 348)
units
MAX78000 CTBGA Surface Mount 81 ARM Cortex M4 32bit 128 kB, 512 kB 50MHz - - - - - -
RS Stock No. 189-9622
Mfr. Part No.DS89C430-QNL+
SGD31.17
Each
units
DS89C PLCC Surface Mount 44 8051 8bit 16 kB 33MHz 1 kB - - - - 4.5 → 5.5 V
RS Stock No. 189-7519
Mfr. Part No.DS89C430-QNL+
SGD27.11
Each (In a Tube of 28)
units
DS89C PLCC Surface Mount 44 8051 8bit 16 kB 33MHz 1 kB - - - - 4.5 → 5.5 V
RS Stock No. 190-4581
Mfr. Part No.DS80C390-FNR+
SGD43.25
Each (In a Tray of 160)
units
DS80C LQFP Surface Mount 64 80C52 8bit 4 kB 40MHz 4 kB - - - - 5 V
RS Stock No. 189-9466
Mfr. Part No.DS80C320-MCG+
SGD26.29
Each
units
DS80C PDIP Through Hole 40 80C32 8bit 64 kB 33MHz 64 kB - - - - 5 V
New
RS Stock No. 215-7976
Mfr. Part No.MAX32670GTL+
SGD4.764
Each (In a Pack of 5)
units
MAX TQFN Surface Mount 40 ARM Cortex 32bit 384 kB 32MHz - - - - - -
RS Stock No. 165-9376
Mfr. Part No.DS89C450-MNL+
SGD35.59
Each (In a Tube of 10)
units
DS89C PDIP Through Hole 40 8051 8bit 64 kB 33MHz 1 kB - - - - 5 V
RS Stock No. 189-7512
Mfr. Part No.DS80C320-QCL+
SGD33.936
Each (In a Tube of 28)
units
DS80C PLCC Surface Mount 44 8051 8bit - 33MHz 256 B - - - - 4.5 → 5.5 V
RS Stock No. 203-4680
Mfr. Part No.MAX1464AAI+
SGD17.13
Each
units
MAX1464 28 SSOP Surface Mount 28 CPU - 4 kB 4MHz - - - - - -
RS Stock No. 189-7511
Mfr. Part No.DS80C320-MCG+
SGD26.069
Each (In a Tube of 10)
units
DS80C PDIP Through Hole 40 80C32 8bit 64 kB 33MHz 64 kB - - - - 5 V
RS Stock No. 189-9518
Mfr. Part No.DS80C323-MCD+
SGD15.28
Each
units
DS80C PDIP Through Hole 40 8051 8bit 64 kB 18MHz 64 kB - - - - 4.5 → 5.5 V
RS Stock No. 189-9591
Mfr. Part No.DS87C520-QCL+
SGD68.12
Each
units
DS87C PLCC Surface Mount 44 8051 8bit 16 kB 33MHz 1.25 kB - - - - 4.5 → 5.5 V
RS Stock No. 189-9565
Mfr. Part No.DS87C520-MNL+
SGD86.29
Each
units
DS87C PDIP Through Hole 40 8051 8bit 16 kB 33MHz 1.25 kB - - - - 4.5 → 5.5 V
RS Stock No. 190-4967
Mfr. Part No.DS80C390-FNR+
SGD45.61
Each
units
DS80C LQFP Surface Mount 64 80C52 8bit 4 kB 40MHz 4 kB - - - - 5 V
RS Stock No. 138-073
Mfr. Part No.DS87C520-MCL+
SGD57.96
Each
units
DS87C PDIP Through Hole 40 8051 8bit 16 kB 33MHz 1.25 kB - - - - 4.5 → 5.5 V
RS Stock No. 190-4964
Mfr. Part No.DS80C320-QNG+
SGD36.74
Each
units
DS80C PLCC Surface Mount 44 80C32 8bit 64 kB 25MHz 64 kB - - - - 5 V
RS Stock No. 190-4961
Mfr. Part No.DS80C320-QCG+
SGD33.76
Each
units
DS80C PLCC Surface Mount 44 80C32 8bit 64 kB 25MHz 64 kB - - - - 5 V
RS Stock No. 190-4580
Mfr. Part No.DS80C320-QNG+
SGD32.365
Each (In a Tube of 28)
units
DS80C PLCC Surface Mount 44 80C32 8bit 64 kB 25MHz 64 kB - - - - 5 V
RS Stock No. 190-4971
Mfr. Part No.DS89C430-MNL+
SGD34.06
Each
units
DS89C PDIP Through Hole 40 8051 8bit 16 kB 33MHz 1 kB - - - - 5 V