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
$3.581
Each (On a Reel of 1000)
units
XC866 TSSOP Surface Mount 38 8051 8bit 4 kB, 12 kB 26.7MHz 256 B, 512 B - 1 8 - 4.5 → 5.5 V
RS Stock No. 629-5046
Mfr. Part No.XC8664FRIBEFXUMA1
BrandInfineon
$3.51
Each
units
XC866 TSSOP Surface Mount 38 8051 8bit 4 Kb, 12 Kb 26.7MHz 256 B, 512 B - 1 8 - 4.5 → 5.5 V
RS Stock No. 110-7760
Mfr. Part No.XC164CS16F40FBBFXQMA1
BrandInfineon
$31.61
Each
units
XC166 TQFP Surface Mount 100 C166S V2 16bit 128 kB 20MHz 2 (DPRAM) kB, 2 (PSRAM) kB, 4 (DSRAM) kB - - 14 - 2.35 → 2.7 (Core) V, 4.4 → 5.5 (I/O) V
RS Stock No. 906-2912
Mfr. Part No.XMC4500F144K1024ACXQMA1
BrandInfineon
$18.00
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. 166-0843
Mfr. Part No.XC167CI32F40FBBAKXQMA1
BrandInfineon
$33.32
Each (In a Tray of 360)
units
XC166 TQFP Surface Mount 144 C166S V2 16bit 256 kB 20MHz 2 (DPRAM) kB, 4 (DSRAM) kB, 6 (PSRAM) kB - - 16 - 2.35 → 2.7 (Core) V, 4.4 → 5.5 (I/O) V
RS Stock No. 917-3413
Mfr. Part No.XMC4800F100K2048AAXQMA1
BrandInfineon
$38.51
Each
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. 165-8227
Mfr. Part No.XMC4300F100K256AAXQMA1
BrandInfineon
$17.59
Each (In a Tray of 540)
units
XMC4300 LFQFP Surface Mount 100 ARM Cortex M4 - 256 kB 144MHz 128 kB 1 - 8 - -
RS Stock No. 917-3425
Mfr. Part No.XMC4800E196K2048AAXQMA1
BrandInfineon
$41.05
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. 110-7117
Mfr. Part No.XE164FM72F80LRABKXUMA1
BrandInfineon
$19.75
Each
units
XE166 LQFP Surface Mount 100 C166 16bit - 80MHz - - - 16 - 1.4 → 1.6 V
RS Stock No. 914-0084
Mfr. Part No.XMC1301T038F0032ABXUMA1
BrandInfineon
$3.18
Each (In a Pack of 5)
units
XMC1000 TSSOP Surface Mount 38 ARM Cortex M0 32bit 32 kB 66.4MHz 16 kB - - 16 - 1.8 → 5.5 V
RS Stock No. 110-7162
Mfr. Part No.XE167FM72F80LRABKXUMA1
BrandInfineon
$21.30
Each
units
XE166 LQFP Surface Mount 144 C166 16bit 576 kB 100MHz 16 (DSRAM) kB, 32 (PSRAM) kB - - 34 - 1.5 V
RS Stock No. 165-8226
Mfr. Part No.XMC4800F100K2048AAXQMA1
BrandInfineon
$28.50
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. 165-8043
Mfr. Part No.XMC1100T016X0064ABXUMA1
BrandInfineon
$1.79
Each (On a Reel of 3000)
units
XMC1100 TSSOP Surface Mount 16 ARM Cortex M0 32bit 64 kB 32MHz 16 kB - - 6 - 1.8 → 5.5 V
RS Stock No. 914-0078
Mfr. Part No.XMC1100T016F0064ABXUMA1
BrandInfineon
$3.52
Each (In a Pack of 6)
units
XMC1000 TSSOP Surface Mount 16 ARM Cortex M0 32bit 64 kB 66.4MHz 16 kB - - 6 - 1.8 → 5.5 V
RS Stock No. 124-1098
Mfr. Part No.XMC4100F64K128BAXQMA1
BrandInfineon
$8.94
Each
units
XMC4000 TQFP Surface Mount 64 Cortex M4 32bit 128 kB 80MHz 20 kB 1 - 10 - 3.3 V
RS Stock No. 914-0062
Mfr. Part No.XMC4400F100K512ABXQSA1
BrandInfineon
$17.03
Each
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. 857-7157
Mfr. Part No.XC8662FRIBEFXUMA1
BrandInfineon
$1.627
Each (On a Reel of 1000)
units
XC800 TSSOP Surface Mount 38 XC800 8bit 4 kB 26.67MHz 256 B, 512 B - 1 8 1 3.3 → 5 V
RS Stock No. 166-0791
Mfr. Part No.XMC4500E144X1024ACXQSA1
BrandInfineon
$15.35
Each (In a Tray of 240)
units
XMC4000 LFBGA Surface Mount 144 ARM Cortex M4 32bit 1.024 MB 120MHz 160 kB - - 32 - 1.3 (Core) V, 3.3 (Digital) V
RS Stock No. 166-0917
Mfr. Part No.XE167F96F80LACFXUMA1
BrandInfineon
$12.65
Each (On a Reel of 1000)
units
XC166 LQFP Surface Mount 144 C166S V2 16bit 768 kB 80MHz 64 (PSRAM) kB - - 24 - 3 → 5.5 V
RS Stock No. 110-7493
Mfr. Part No.XMC4500E144X1024ACXQSA1
BrandInfineon
$19.22
Each
units
XMC4000 LFBGA Surface Mount 144 ARM Cortex M4 32bit 1.024 MB 120MHz 160 kB - - 32 - 1.3 (Core) V, 3.3 (Digital) V