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. 166-0857
Mfr. Part No.XC8664FRIBEFXUMA1
BrandInfineon
$3.617
Each (On a Reel of 1000)
units
XC866 TSSOP Surface Mount 38 8051 8bit 4 kB, 12 kB 26.7MHz 256 B, 512 B 0 1 8 0 4.5 → 5.5 V
RS Stock No. 629-5046
Mfr. Part No.XC8664FRIBEFXUMA1
BrandInfineon
$3.89
Each
units
XC866 TSSOP Surface Mount 38 8051 8bit 12 Kb, 4 Kb 26.7MHz 256 B, 512 B 0 1 8 0 4.5 → 5.5 V
RS Stock No. 165-8223
Mfr. Part No.XMC4400F100K512ABXQSA1
BrandInfineon
$18.693
Each (In a Tray of 90)
units
XMC4000 LQFP Surface Mount 100 ARM Cortex M4 32bit 512 kB 120MHz 80 kB 1 - 24 - 1.3 V, 3.3 V
RS Stock No. 165-8224
Mfr. Part No.XMC4500F100K1024ACXQSA1
BrandInfineon
$15.653
Each (In a Tray of 90)
units
XMC4000 LQFP Surface Mount 100 ARM Cortex M4 32bit 1.024 MB 120MHz 160 kB 1 - 24 - 1.3 V, 3.3 V
RS Stock No. 110-7184
Mfr. Part No.XE164F96F80LACFXUMA1
BrandInfineon
$16.73
Each
units
XE166 LQFP Surface Mount 100 C166 16bit 768 kB 80MHz 64 kB 0 - 16 - 1.4 → 1.6 V
RS Stock No. 165-5854
Mfr. Part No.XMC4500F100K1024ACXQSA1
BrandInfineon
$14.87
Each (In a Tray of 90)
units
XMC4000 LQFP Surface Mount 100 ARM Cortex M4 32bit 1.024 MB 120MHz 160 kB 1 - 24 2 3.3 V
RS Stock No. 145-9566
Mfr. Part No.XMC4100F64K128ABXQSA1
BrandInfineon
$7.681
Each (In a Tray of 160)
units
XMC4000 LQFP Surface Mount 64 ARM Cortex M4 32bit 128 kB 80MHz 20 kB 1 - 10 - 1.3 V, 3.3 V
RS Stock No. 165-8225
Mfr. Part No.XMC4700F100K2048AAXQMA1
BrandInfineon
$26.869
Each (In a Tray of 540)
units
XMC4000 LQFP Surface Mount 100 ARM Cortex M4 32bit 2.048 MB 144MHz 352 kB 1 - 8 - 1.3 V, 3.3 V
RS Stock No. 124-1096
Mfr. Part No.XMC1404Q064X0200AAXUMA1
BrandInfineon
$7.30
Each
units
XMC1000 VQFN Surface Mount 64 Cortex-M0 32bit 200 kB 48MHz 16 kB 0 0 12 - 1.8 → 5.5 V
RS Stock No. 917-3429
Mfr. Part No.XMC4300F100K256AAXQMA1
BrandInfineon
$20.66
Each
units
XMC4300 LFQFP Surface Mount 100 ARM Cortex M4 - 256 kB 144MHz 128 kB 1 - 8 - -
RS Stock No. 165-8226
Mfr. Part No.XMC4800F100K2048AAXQMA1
BrandInfineon
$45.753
Each (In a Tray of 540)
units
XMC4000 LQFP Surface Mount 100 ARM Cortex M4 32bit 2.048 MB 144MHz 352 kB 1 - 8 - 1.3 V, 3.3 V
RS Stock No. 914-0078
Mfr. Part No.XMC1100T016F0064ABXUMA1
BrandInfineon
$2.97
Each (In a Pack of 6)
units
XMC1000 TSSOP Surface Mount 16 ARM Cortex M0 32bit 64 kB 66.4MHz 16 kB 0 - 6 - 1.8 → 5.5 V
RS Stock No. 917-3425
Mfr. Part No.XMC4800E196K2048AAXQMA1
BrandInfineon
$37.50
Each
units
XMC4000 LFBGA Surface Mount 196 ARM Cortex M4 32bit 2.048 MB 144MHz 352 kB 1 - 8 - 1.3 V, 3.3 V
RS Stock No. 166-0890
Mfr. Part No.XC164CS16F40FBBFXQMA1
BrandInfineon
$33.056
Each (In a Tray of 540)
units
XC166 TQFP Surface Mount 100 C166S V2 16bit 128 kB 20MHz 2 (DPRAM) kB, 2 (PSRAM) kB, 4 (DSRAM) kB 0 0 14 - 2.35 → 2.7 (Core) V, 4.4 → 5.5 (I/O) V
RS Stock No. 110-7493
Mfr. Part No.XMC4500E144X1024ACXQSA1
BrandInfineon
$18.28
Each
units
XMC4000 LFBGA Surface Mount 144 ARM Cortex M4 32bit 1.024 MB 120MHz 160 kB 0 0 32 - 1.3 (Core) V, 3.3 (Digital) V
RS Stock No. 906-2912
Mfr. Part No.XMC4500F144K1024ACXQMA1
BrandInfineon
$16.90
Each
units
XMC4000 LQFP Surface Mount 144 ARM Cortex M4 32bit 1.024 MB 120MHz 160 kB 1 - 8 - 1.3 V, 3.3 V
RS Stock No. 752-8417
Mfr. Part No.C515C8EMCAFXQMA1
BrandInfineon
$30.72
Each
units
C515C MQFP Surface Mount 80 8051 8bit 64 kB 10MHz 2.25 kB 0 4 8 1 4.25 → 5.5 V
RS Stock No. 166-0922
Mfr. Part No.XE164F96F80LACFXUMA1
BrandInfineon
$19.41
Each (On a Reel of 1400)
units
XE166 LQFP Surface Mount 100 C166 16bit 768 kB 80MHz 64 kB 0 - 16 - 1.4 → 1.6 V
RS Stock No. 178-1501
Mfr. Part No.XMC4500F144K1024ACXQMA1
BrandInfineon
$15.092
Each (In a Tray of 60)
units
XMC4000 LQFP Surface Mount 144 ARM Cortex M4 32bit 1.024 MB 120MHz 160 kB 1 - 8 - 1.3 V, 3.3 V
RS Stock No. 110-7162
Mfr. Part No.XE167FM72F80LRABKXUMA1
BrandInfineon
$14.34
Each
units
XE166 LQFP Surface Mount 144 C166 16bit 576 kB 100MHz 16 (DSRAM) kB, 32 (PSRAM) kB 0 - 34 - 1.5 V