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. 902-8221
Mfr. Part No.R5F72375ADFP#V0
HK$126.28
Each
units
SuperH LQFP Surface Mount 120 SH-2A 32bit 32 (Flash) kB, 512 (ROM) kB 160MHz 64 kB - - 16 - 3 → 3.6 V
RS Stock No. 775-3903
Mfr. Part No.R7F0C80112ESP#AA0
HK$1.837
Each (In a Pack of 25)
units
R7F0C80 LSSOP Surface Mount 10 RL78-S1 8bit 1 kB 5MHz 128 B - - 4 1 2.4 → 5.5 V
RS Stock No. 757-8184
Mfr. Part No.R5F56218BDFB#V0
HK$93.55
Each
units
RX600 LFQFP Surface Mount 144 RX 32bit 512 kB 100MHz 96 kB 2 1 12 2 2.7 → 3.6 V
RS Stock No. 177-5038
Mfr. Part No.R5F100GDAFB
HK$14.048
Each (In a Tray of 250)
units
RL78/G13 LQFP Surface Mount 48 RL78 16bit 48 kB 32MHz 3 kB - - 10 5 1.6 → 5.5 V
RS Stock No. 758-1455
Mfr. Part No.R5F100LFAFB#V0
HK$25.33
Each
units
RL78/G13 LQFP Surface Mount 64 RL78/G13 16bit 96 kB 32MHz 8 kB - 1 12 - 1.6 → 5.5 V
RS Stock No. 757-8471
Mfr. Part No.UPD78F1146AGB-GAH-AX
HK$59.77
Each
units
UPD LFQFP Surface Mount 64 78K0R 16bit 256 kB 20MHz 12 kB - 1 8 - 1.8 → 5.5 V
RS Stock No. 789-3339
Mfr. Part No.R5F100GDAFB
HK$17.70
Each
units
RL78/G13 LQFP Surface Mount 48 RL78 16bit 48 kB 32MHz 3 kB - - 10 5 1.6 → 5.5 V
RS Stock No. 177-5011
Mfr. Part No.R5F100LFAFB#V0
HK$21.141
Each (In a Tray of 160)
units
RL78/G13 LQFP Surface Mount 64 RL78/G13 16bit 96 kB 32MHz 8 kB - 1 12 - 1.6 → 5.5 V
RS Stock No. 757-8377
Mfr. Part No.R5F213G6CNSP#U0
HK$31.40
Each
units
R8C LSSOP Surface Mount 24 R8C 16bit 32 kB 20MHz 2.5 kB - 1 8 - 2.7 → 5.5 V
RS Stock No. 757-8229
Mfr. Part No.R5F5631BDDFP#V0
HK$117.99
Each
units
RX LFQFP Surface Mount 100 RX631 32bit 1 MB 100MHz 128 kB 2 1 22 3 2.7 → 3.6 V
RS Stock No. 829-1027
Mfr. Part No.R5F10Y16ASP#V0
HK$6.03
Each (In a Pack of 10)
units
RL78 LSSOP Surface Mount 10 RL78-S1 16bit 2 kB 20MHz 256 B - 1 4 1 2 → 5.5 V
RS Stock No. 124-0451
Mfr. Part No.R5F52315ADFL#30
HK$35.38
Each
units
RX231 LFQFP Surface Mount 48 RXv2 CPU 32bit 128 kB 54MHz 32 kB 1 - 8 - 1.8 → 5.5 V
RS Stock No. 902-8293
Mfr. Part No.R7S721020VCBG#AC1
HK$127.71
Each
units
RZ LFBGA Surface Mount 176 Cortex A9 32bit - 400MHz 3.072 MB 2 - 8 - 3 → 3.6 V
RS Stock No. 124-3698
Mfr. Part No.R5F571MFCDFC#V0
HK$195.24
Each
units
RX71M LQFP Surface Mount 176 - 32bit 2 MB 240MHz 512 kB 1 - 29 - 1.7 → 3.6 V
RS Stock No. 757-8308
Mfr. Part No.R5F563NBDDFP#V0
HK$132.60
Each
units
RX LFQFP Surface Mount 100 RX63N 32bit 1 MB 100MHz 128 kB 2 1 22 3 2.7 → 3.6 V
RS Stock No. 901-6095
Mfr. Part No.R5F10Y16ASP#X0
HK$6.03
Each (In a Pack of 10)
units
RL78 LSSOP Surface Mount 10 RL78 16bit 2 kB 20MHz 250 B - - 4 - 2 → 5.5 V
RS Stock No. 663-4056
Mfr. Part No.M30260F8BGP
HK$63.38
Each
units
R8C LQFP Surface Mount 48 M16C/26A 16bit 64 kB 24MHz 2 kB - 1 12 - 4.2 → 5.5 V
RS Stock No. 376-035
Mfr. Part No.R5F212CCSNFP
HK$38.23
Each
units
R8C LQFP Surface Mount 80 R8C/2C 16bit 128 kB 20MHz 7.5 kB - 2 20 - 2.2 → 5.5 V
RS Stock No. 192-8153
Mfr. Part No.R7FS124773A01CFL#AA1
HK$33.20
Each (In a Pack of 2)
units
Synergy MCU LQFP Surface Mount 48 - - 128 kB 32MHz 16 kB - 2 - 2 1.6 → 5.5 V
RS Stock No. 177-4998
Mfr. Part No.R5F563NBDDFP
HK$116.498
Each (In a Tray of 90)
units
RX LQFP Surface Mount 100 RX 32bit 1 MB 100MHz 128 kB 2 - 8, 21 3 2.7 → 3.6 V