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. 539-0184
Mfr. Part No.MC68HC11E1CFNE2
BrandNXP
SGD26.639
Each (In a Tube of 23)
units
M68HC11 PLCC Surface Mount 52 HC11 8bit 512 B 2MHz 512 B - - 8 1 3 → 5.5 V
RS Stock No. 840-6493
Mfr. Part No.MK22FX512VMD12
BrandNXP
SGD18.76
Each
units
Kinetis K2x MAPBGA Surface Mount 144 ARM Cortex M4 32bit 640 kB 120MHz 132 kB 1 4 2 3 1.71 → 3.6 V
RS Stock No. 170-8951
Mfr. Part No.MK22FX512VMD12
BrandNXP
SGD13.38
Each (In a Tray of 160)
units
Kinetis K2x MAPBGA Surface Mount 144 ARM Cortex M4 32bit 640 kB 120MHz 132 kB 1 4 2 3 1.71 → 3.6 V
RS Stock No. 791-8116
Mfr. Part No.LPC1115FBD48/303,1
BrandNXP
SGD5.795
Each (In a Pack of 2)
units
LPC1100XL LQFP Surface Mount 48 ARM Cortex M0 32bit 64 kB 25MHz 8 kB - 1 8 2 3.3 V
RS Stock No. 166-0032
Mfr. Part No.LPC1115FBD48/303,1
BrandNXP
SGD4.043
Each (In a Tray of 250)
units
LPC1100XL LQFP Surface Mount 48 ARM Cortex M0 32bit 64 kB 25MHz 8 kB - 1 8 2 3.3 V
RS Stock No. 800-7438
Mfr. Part No.MKE02Z16VLC4
BrandNXP
SGD3.886
Each (In a Pack of 5)
units
Kinetis E QFP Surface Mount 32 ARM Cortex M0+ 32bit 16 kB 40MHz - - - - - 5 V
RS Stock No. 169-7256
Mfr. Part No.MKE02Z16VLC4
BrandNXP
SGD2.531
Each (In a Tray of 250)
units
Kinetis E QFP Surface Mount 32 ARM Cortex M0+ 32bit 16 kB 40MHz - - - - - 5 V
RS Stock No. 800-7513
Mfr. Part No.MKE06Z64VLD4
BrandNXP
SGD5.88
Each (In a Pack of 2)
units
Kinetis E QFP Surface Mount 44 ARM Cortex M0+ 32bit 64 kB 48MHz - - - - - 5 V
RS Stock No. 539-0263
Mfr. Part No.MCHC11F1CFNE4
BrandNXP
SGD34.74
Each
units
M68HC11 PLCC Surface Mount 68 HC11 8bit 512 B 3MHz 1.024 kB - 1 8 1 -
RS Stock No. 168-9640
Mfr. Part No.MCHC11F1CFNE4
BrandNXP
SGD31.311
Each (In a Tube of 18)
units
M68HC11 PLCC Surface Mount 68 HC11 8bit 512 B 3MHz 1.024 kB - 1 8 1 -
RS Stock No. 725-7761
Mfr. Part No.LPC2134FBD64/01,15
BrandNXP
SGD18.75
Each
units
LPC21 LQFP Surface Mount 64 ARM7TDMI-S 16 bit, 32bit 128 kB 60MHz 16 kB - 1 8 2 3 → 3.6 V
RS Stock No. 166-0252
Mfr. Part No.LPC2134FBD64/01,15
BrandNXP
SGD14.564
Each (In a Tray of 160)
units
LPC21 LQFP Surface Mount 64 ARM7TDMI-S 16 bit, 32bit 128 kB 60MHz 16 kB - 1 8 2 3 → 3.6 V
RS Stock No. 539-0291
Mfr. Part No.MC68HC705C8ACFNE
BrandNXP
SGD24.43
Each
units
M68HC05 PLCC Surface Mount 44 HC05 8bit 8 kB 2.1MHz 304 B - - - 1 3 → 5.5 V
RS Stock No. 169-7271
Mfr. Part No.MKE06Z64VLD4
BrandNXP
SGD4.263
Each (In a Tray of 160)
units
Kinetis E QFP Surface Mount 44 ARM Cortex M0+ 32bit 64 kB 48MHz - - - - - 5 V
RS Stock No. 168-9641
Mfr. Part No.MC68HC705C8ACFNE
BrandNXP
SGD20.90
Each (In a Tube of 26)
units
M68HC05 PLCC Surface Mount 44 HC05 8bit 8 kB 2.1MHz 304 B - - - 1 3 → 5.5 V
RS Stock No. 813-4195
Mfr. Part No.MC9S12E128CPVE
BrandNXP
SGD28.92
Each
units
HCS12 LQFP Surface Mount 112 HSC12 16bit 128 kB 50MHz 8 kB - 2 16 1 3.13 → 5.5 V
RS Stock No. 103-8109
Mfr. Part No.LPC4350FET256,551
BrandNXP
SGD16.16
Each (In a Tube of 90)
units
LPC43 LBGA Surface Mount 256 ARM Cortex M4 32bit - 204MHz 264 kB 1 x Device, 1 x Host, 1 x OTG 1 8 4 3.3 V
RS Stock No. 800-7462
Mfr. Part No.MKE02Z64VLD4
BrandNXP
SGD4.69
Each (In a Pack of 4)
units
Kinetis E LQFP Surface Mount 44 ARM Cortex M0+ 32bit 64 kB 40MHz 4 kB - - 16 2 2.7 → 5.5 V
RS Stock No. 169-7281
Mfr. Part No.MC9S12A64CFUE
BrandNXP
SGD23.08
Each (In a Tray of 84)
units
HCS12 QFP Surface Mount 80 HSC12 16bit 64 kB 25MHz 4 kB - 2 8 1 2.5 → 5 V
RS Stock No. 813-4189
Mfr. Part No.MC9S12A64CFUE
BrandNXP
SGD26.40
Each
units
HCS12 QFP Surface Mount 80 HSC12 16bit 64 kB 25MHz 4 kB - 2 8 1 2.5 → 5 V