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. 165-8088
Mfr. Part No.XMC1301T038F0032ABXUMA1
BrandInfineon
$2.208
Each (On a Reel of 3000)
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. 914-0084
Mfr. Part No.XMC1301T038F0032ABXUMA1
BrandInfineon
$2.352
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. 165-8210
Mfr. Part No.XMC4104F64K128ABXQSA1
BrandInfineon
$9.071
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. 407-757
Mfr. Part No.XC886C8FFA5VACKXUMA1
BrandInfineon
$8.33
Each
units
XC866 TQFP Surface Mount 48 8051 8bit 32 kB 24MHz 15 kB, 256 B - 1 8 - 2.3 → 5.5 V
RS Stock No. 919-8828
Mfr. Part No.XC886C8FFA5VACKXUMA1
BrandInfineon
$3.402
Each (On a Reel of 1800)
units
XC866 TQFP Surface Mount 48 8051 8bit 32 kB 24MHz 15 kB, 256 B - 1 8 - 2.3 → 5.5 V
RS Stock No. 914-0059
Mfr. Part No.XMC4104F64K128ABXQSA1
BrandInfineon
$8.505
Each (In a Pack of 2)
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. 124-1097
Mfr. Part No.XMC4100F64F128BAXQMA1
BrandInfineon
$34.37
Each
units
XMC4000 TQFP Surface Mount 64 Cortex M4 32bit 128 kB 80MHz 20 kB 1 - 10 - 3.3 V
RS Stock No. 124-1098
Mfr. Part No.XMC4100F64K128BAXQMA1
BrandInfineon
$34.35
Each
units
XMC4000 TQFP Surface Mount 64 Cortex M4 32bit 128 kB 80MHz 20 kB 1 - 10 - 3.3 V
RS Stock No. 145-9566
Mfr. Part No.XMC4100F64K128ABXQSA1
BrandInfineon
$6.913
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. 914-0056
Mfr. Part No.XMC4100F64K128ABXQSA1
BrandInfineon
$9.985
Each (In a Pack of 2)
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. 165-8192
Mfr. Part No.XMC4700F144K2048AAXQMA1
BrandInfineon
$27.636
Each (In a Tray of 360)
units
XMC4000 LQFP Surface Mount 144 ARM Cortex M4 32bit 2.048 MB 144MHz 352 kB 1 - 8 - 1.3 V, 3.3 V
RS Stock No. 917-3416
Mfr. Part No.XMC4700F144K2048AAXQMA1
BrandInfineon
$21.25
Each
units
XMC4000 LQFP Surface Mount 144 ARM Cortex M4 32bit 2.048 MB 144MHz 352 kB 1 - 8 - 1.3 V, 3.3 V
RS Stock No. 166-0843
Mfr. Part No.XC167CI32F40FBBAKXQMA1
BrandInfineon
$47.572
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. 752-8423
Mfr. Part No.XE167F96F66LACFXUMA1
BrandInfineon
$14.65
Each
units
XE166 LQFP Surface Mount 144 C166S V2 16 bit, 32 bit 768 kB 66MHz 82 kB - 3 24 6 3 to 5.5 V
RS Stock No. 110-7769
Mfr. Part No.XC167CI32F40FBBAKXQMA1
BrandInfineon
$37.09
Each
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. 166-0922
Mfr. Part No.XE164F96F80LACFXUMA1
BrandInfineon
$17.469
Each (On a Reel of 1400)
units
XE166 LQFP Surface Mount 100 C166 16bit 768 kB 80MHz 64 kB - - 16 - 1.4 → 1.6 V
RS Stock No. 166-1175
Mfr. Part No.C167CRLMHAKXQLA2
BrandInfineon
$23.382
Each (In a Tray of 168)
units
C166 P-MQFP-144-8 Surface Mount 144 C166 16bit - 25MHz 2 kB - 1 16 - 4.5 → 5.5 V
RS Stock No. 914-0062
Mfr. Part No.XMC4400F100K512ABXQSA1
BrandInfineon
$15.48
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. 124-1096
Mfr. Part No.XMC1404Q064X0200AAXUMA1
BrandInfineon
$23.72
Each
units
XMC1000 VQFN Surface Mount 64 Cortex-M0 32bit 200 kB 48MHz 16 kB - - 12 - 1.8 → 5.5 V
RS Stock No. 914-0069
Mfr. Part No.XMC4500F100K1024ACXQSA1
BrandInfineon
$15.32
Each
units
XMC4000 LQFP Surface Mount 100 ARM Cortex M4 32bit 1.024 MB 120MHz 160 kB 1 - 24 - 1.3 V, 3.3 V