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. 775-3900
Mfr. Part No.R7F0C30542ESP#AC0
$0.374
Each (In a Pack of 25)
units
R7F0C30 SSOP Surface Mount 16 78K0 8bit 16 kB 10MHz 768 B 0 0 6 0 1.8 5.5 V
RS Stock No. 124-0554
Mfr. Part No.R5F51103ADFL#30
$5.125
Each (In a Pack of 2)
units
RX110 LFQFP Surface Mount 48 RX 32bit 64 kB 32MHz 10 kB 0 0 10 - 1.8 3.6 V
RS Stock No. 242-699
Mfr. Part No.R5F211B1DSP
$3.33
Each
units
R8C LSSOP Surface Mount 20 R8C/1B 16bit 2 kB, 4 kB 20MHz 384 B 0 - 4 0 2.7 → 5.5 V
RS Stock No. 732-9878
Mfr. Part No.R5F72167ADFP
$81.52
Each
units
SuperH LFQFP Surface Mount 176 SH-2A-FPU 32bit 1 MB 200MHz 32 MB, 128 kB 1 x Host 2 8 1 3 3.6 V, 4 5.5 V
RS Stock No. 663-4050
Mfr. Part No.M30263F8BFP
$12.80
Each
units
R8C SSOP Surface Mount 42 M16C/26A 16bit 64 kB 24MHz 2 kB 0 1 10 0 4.2 → 5.5 V
RS Stock No. 124-0596
Mfr. Part No.R5F51135ADFP#3A
$8.37
Each
units
RX113 LFQFP Surface Mount 100 RX 32bit 128 kB 32MHz 32 kB 1 0 17 - 1.8 3.6 V
RS Stock No. 122-5476
Mfr. Part No.R5F101AGASP#V0
$6.985
Each (In a Pack of 2)
units
RL78/G13 LSSOP Surface Mount 30 RL78 16bit 128 kB 32MHz 12 kB 0 0 8 - 1.6 5.5 V
RS Stock No. 530-9217
Mfr. Part No.HD64F3052BF25V
$46.01
Each
units
H8 PQFP Surface Mount 100 H8/3052B 16/32bit 512 kB 25MHz 8 kB 0 1 8 0 4.5 5.5 V
RS Stock No. 182-6283
Mfr. Part No.R5F566TEADFP#30
$15.97
Each
units
RX66T LFQFP Surface Mount 100 - 32bit 512 kB 160MHz 64 kB 0 1 30 8 2.7 → 5.5 V
RS Stock No. 124-0504
Mfr. Part No.R5F562GAADFH#V3
$18.91
Each
units
RX62G LQFP Surface Mount 112 RX 32bit 256 kB 100MHz 16 kB 0 0 20 - 5 V
RS Stock No. 376-035
Mfr. Part No.R5F212CCSNFP
$13.83
Each
units
R8C LQFP Surface Mount 80 R8C/2C 16bit 128 kB 20MHz 7.5 kB 0 2 20 0 2.2 → 5.5 V
RS Stock No. 772-6447
Mfr. Part No.R5F56217BDFP#V0
$20.38
Each
units
RX LQFP Surface Mount 100 RX 32bit 32 kB, 384 kB 100MHz 64 kB 1 4 4, 8 2 2.7 3.6 V
RS Stock No. 124-0397
Mfr. Part No.R5F104PLAFA#30
$16.04
Each
units
RL78/G14 LQFP Surface Mount 100 RL78 16bit 512 kB 32MHz 48 kB 0 0 20 - 1.6 5.5 V
RS Stock No. 188-4207
Mfr. Part No.R5F56519ADFB#30
$19.09
Each
units
RX651 LFQFP Surface Mount 144 CPU 32bit 1 MB 120MHz 256 kB 1 - 29 16 2.7 → 3.6 V
RS Stock No. 901-5284
Mfr. Part No.R5F2136CMNFP#V0
$10.675
Each (In a Bag of 2)
units
R8C / 36M LQFP Surface Mount 64 R8C CPU 16bit 128 (ROM) kB, 4 (Flash) kB 20MHz 10 kB 0 - 12 - 1.8 5.5 V
RS Stock No. 179-3640
Mfr. Part No.R5F1056AASP#30
$3.278
Each (In a Pack of 4)
units
RL78 LSSOP Surface Mount 20 - 16bit 16 kB 24MHz 1.5 kB - - 11 - 5.5 (Maximum) V
RS Stock No. 126-2507
Mfr. Part No.R5F564MLCDLC#21
$38.80
Each
units
RX64M TFLGA Surface Mount 177 - 32bit 4 MB 120MHz 512 kB 1 - 29 - 2.7 3.6 V
RS Stock No. 179-8502
Mfr. Part No.R5F11AGHANB#20
$10.27
Each
units
RL78 WQFN Surface Mount 48 - 16bit 192 kB 32MHz 16 kB - 1 8 1 3.6 (Maximum) V
RS Stock No. 829-1415
Mfr. Part No.R5F1076CMSP#V0
$6.525
Each (In a Pack of 2)
units
RL78 SSOP Surface Mount 20 RL78 16bit 32 kB 32MHz 2 kB 0 - 6 0 2.7 5.5 V
RS Stock No. 122-5757
Mfr. Part No.R5F10WLDGFB#30
$8.04
Each (In a Pack of 2)
units
RL78/L13 LQFP Surface Mount 64 RL78 16bit 4 (Data Flash) kB, 48 (Flash ROM) kB 24MHz 2 kB 0 0 9 - 1.6 5.5 V