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
$0.372
Each (In a Pack of 25)
units
R7F0C30 SSOP Surface Mount 16 78K0 8bit 16 kB 10MHz 768 B - - 6 - 1.8 → 5.5 V
RS Stock No. 663-4050
Mfr. Part No.M30263F8BFP
$11.74
Each
units
R8C SSOP Surface Mount 42 M16C/26A 16bit 64 kB 24MHz 2 kB - 1 10 - 4.2 → 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. 122-5476
Mfr. Part No.R5F101AGASP#V0
$6.925
Each (In a Pack of 2)
units
RL78/G13 LSSOP Surface Mount 30 RL78 16bit 128 kB 32MHz 12 kB - - 8 - 1.6 → 5.5 V
RS Stock No. 242-699
Mfr. Part No.R5F211B1DSP
$10.67
Each
units
R8C LSSOP Surface Mount 20 R8C/1B 16bit 2 kB, 4 kB 20MHz 384 B - - 4 - 2.7 → 5.5 V
RS Stock No. 188-4081
Mfr. Part No.R5F5651CDDFB#30
$19.532
Each (In a Tray of 50)
units
RX651 LFQFP Surface Mount 144 CPU 32bit 1.5 MB 120MHz 640 kB 1 - 29 16 2.7 → 3.6 V
RS Stock No. 177-4981
Mfr. Part No.R5F5631ECDFC
$27.204
Each (In a Tray of 40)
units
RX LQFP Surface Mount 176 RX 32bit 2 MB 100MHz 128 kB 2 - 8, 21 3 2.7 → 3.6 V
RS Stock No. 188-4082
Mfr. Part No.R5F565N4ADFB#30
$16.998
Each (In a Tray of 50)
units
RX65N LFQFP Surface Mount 144 CPU 32bit 512 kB 120MHz 256 kB 1 - 29 16 2.7 → 3.6 V
RS Stock No. 828-3666
Mfr. Part No.R5F5210BBDFB#30
$19.13
Each
units
RX LQFP Surface Mount 144 RX 32bit 1 MB 50MHz 96 kB - - 16 1 1.62 → 5.5 V
RS Stock No. 177-4987
Mfr. Part No.R5F563NBDDFB
$18.437
Each (In a Tray of 60)
units
RX LQFP Surface Mount 144 RX 32bit 1 MB 100MHz 128 kB 2 - 8, 21 3 2.7 → 3.6 V
RS Stock No. 188-4092
Mfr. Part No.R7S910006CBG#AC0
$46.613
Each (In a Tray of 50)
units
RZ/T1 BGA Surface Mount 320 - 32bit - 450MHz 1.568 MB 1 - 24 1 3 → 3.6 V
RS Stock No. 126-0951
Mfr. Part No.R5F5631WDDFB#V0
$29.54
Each
units
RX631 LQFP Surface Mount 144 RX 32bit 1 MB 100MHz 128 kB 1 - 8, 21 - 2.7 → 3.6 V
RS Stock No. 601-6944
Mfr. Part No.M38K09F8LFP
$22.78
Each
units
740 LQFP Surface Mount 64 38K0 8bit 32 kB 8MHz 2 kB 1 x Device - 8 - 4 → 5.25 V
RS Stock No. 177-4992
Mfr. Part No.R5F1076CGSP
$15.916
Each (In a Tray of 80)
units
RL78/I1A LSSOP Surface Mount 20 RL78 16bit 32 kB 32MHz 2 kB - - 6 - 2.7 → 5.5 V
RS Stock No. 124-0453
Mfr. Part No.R5F52315ADFP#30
$10.60
Each
units
RX231 LFQFP Surface Mount 100 RXv2 CPU 32bit 128 kB 54MHz 32 kB 1 - 24 - 1.8 → 5.5 V
RS Stock No. 188-4093
Mfr. Part No.R7S910007CBG#AC0
$66.055
Each (In a Tray of 50)
units
RZ/T1 BGA Surface Mount 320 - 32bit - 600MHz 1.568 MB 1 - 24 1 3 → 3.6 V
RS Stock No. 124-0595
Mfr. Part No.R5F51135ADFM#3A
$7.48
Each (In a Pack of 2)
units
RX113 LFQFP Surface Mount 64 RX 32bit 128 kB 32MHz 32 kB 1 - 11 - 1.8 → 3.6 V
RS Stock No. 188-4083
Mfr. Part No.R5F565N4ADFP#30
$19.415
Each (In a Tray of 50)
units
RX65N LFQFP Surface Mount 100 CPU 32bit 512 kB 120MHz 256 kB 1 - 22 14 2.7 → 3.6 V
New
RS Stock No. 192-8154
Mfr. Part No.R7FS3A77C3A01CFB#AA1
$21.757
Each (In a Tray of 60)
units
Synergy MCU LQFP Surface Mount 144 - - 1 MB 48MHz 192 kB - 1 - 2 1.6 → 5.5 V
RS Stock No. 177-4984
Mfr. Part No.R5F5630EDDFB
$32.438
Each (In a Tray of 60)
units
RX LQFP Surface Mount 144 RX 32bit 2 MB 100MHz 128 kB 1 - 8, 21 3 2.7 → 3.6 V