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. 176-8962
Mfr. Part No.CY8C4247LQI-BL483
$7.87
Each (In a Tray of 260)
units
CY8C4200 QFN Surface Mount 56 ARM Cortex M0 32bit 128 kb 48MHz 16 kB - 1 1 2 1.8 → 5.5 V
RS Stock No. 124-2964
Mfr. Part No.CY8C4247LQI-BL483
$11.59
Each (In a Pack of 2)
units
PSoC 4 BLE QFN Surface Mount 56 ARM Cortex M0 32bit 128 kB 48MHz 16 kB - - 1 - 1.8 5.5 V
RS Stock No. 176-8982
Mfr. Part No.CY8C4247LQI-BL483
$11.59
Each
units
CY8C4200 QFN Surface Mount 56 ARM Cortex M0 32bit 48 kB 48MHz 16 kB - 1 1 2 1.8 → 5.5 V
RS Stock No. 188-5381
Mfr. Part No.CY8C5888LTI-LP097
$22.932
Each (In a Tray of 260)
units
CY8C58LP QFN Surface Mount 68 ARM Cortex-M3 32bit 256 kB 67MHz 64 kB 1 - 3 - 1.8 → 5.5 V
RS Stock No. 124-2972
Mfr. Part No.CY8C5888LTI-LP097
$29.53
Each
units
CY8C58LP QFN Surface Mount 68 ARM Cortex M3 32bit 256 kB 80MHz 64 kB 1 - 3 - 1.8 V, 2.5 V, 3.3 V, 5 V
RS Stock No. 179-7774
Mfr. Part No.CY8C6347BZI-BLD43
$23.73
Each
units
PSoC BGA Surface Mount 116 ARM Cortex M4F 32bit 1.024 MB 150MHz 288 kB - - 1 1 3.6 (Maximum) V
RS Stock No. 176-9022
Mfr. Part No.CY8C4147AZI-S475
$10.66
Each
units
CY8C4100 TQFP Surface Mount 64 ARM Cortex M0 32bit 128 kB 48MHz 16 kB - 1 2 5 1.8 → 5.5 V
RS Stock No. 178-3270
Mfr. Part No.CY8C29466-24PVXIT
$10.974
Each (On a Reel of 1000)
units
CY8C29 SSOP Surface Mount 28 - 32bit 32 kB 24MHz 2 kB 1 2 1 1 3 → 5.25 V
RS Stock No. 177-1204
Mfr. Part No.CY8C4025LQI-S412
$5.74
Each (In a Pack of 3)
units
CY8C4000 QFN Surface Mount 32 ARM Cortex M0 32bit 32 kB 24MHz 4 kB 1 1 1 2 1.8 → 5.5 V
New
RS Stock No. 193-8480
Mfr. Part No.CY8C3866PVI-070
$41.65
Each (In a Tube of 30)
units
CY8C38 SSOP Surface Mount 48 - 8bit 64 kB 67MHz 8 kB - 1 8 - 1.71 5.5 V
RS Stock No. 176-8980
Mfr. Part No.CY8C4126AZI-S445
$8.06
Each (In a Pack of 2)
units
CY8C4100 TQFP Surface Mount 64 ARM Cortex M0 32bit 64 kB 24MHz 8 kB - 1 2 5 1.8 → 5.5 V
New
RS Stock No. 194-9101
Mfr. Part No.CY8C21434-24LQXI
$7.836
Each (In a Tray of 490)
units
CY8C21434 QFN Surface Mount 32 - 8bit 8 kB 24MHz 512 B 1 4 28 1 2.4 → 5.25 V
RS Stock No. 177-1123
Mfr. Part No.CY8C4045LQI-S411
$3.944
Each (In a Tray of 490)
units
CY8C4000 QFN Surface Mount 24 ARM Cortex M0 32bit 32 kB 48MHz 4 kB 1 1 1 2 1.8 → 5.5 V
New
RS Stock No. 194-9144
Mfr. Part No.CY8C4247AZI-L475
$15.61
Each
units
CY8C4247AZI TQFP Surface Mount 64 ARM Cortex-M0 CPU 32bit 128 kB 48MHz 16 kB - 1 1 1 1.71 → 5.5 V
RS Stock No. 179-2321
Mfr. Part No.CY8C21123-24SXI
$4.496
Each (In a Pack of 5)
units
M8C SOIC Surface Mount 8 PSoC 8bit 4 kB 24MHz 256 B - 2 8 1 5.25 (Maximum) V
New
RS Stock No. 194-9154
Mfr. Part No.CY8C5668AXI-LP034
$31.73
Each
units
CY8C5668AXI TQFP Surface Mount 100 ARM Cortex-M3 32bit 256 kB 67MHz 64 kB 1 1 1 1 1.71 → 5.5 V
RS Stock No. 184-0707
Mfr. Part No.CY8C6316BZI-BLF53
$17.647
Each (In a Tray of 364)
units
PSoC 6 BGA Surface Mount 116 ARM Cortex M4F 32bit 512 kB 150MHz 128 kB 1 - 16 9 3.6 (Maximum) V
RS Stock No. 181-3773
Mfr. Part No.CY8C4145AZI-PS433
$9.365
Each (In a Pack of 2)
units
PSoC4100 TQFP Surface Mount 48 ARM Cortex M0 32bit 32 kB 48MHz 4 kB - 1 2 1 1.71 → 5.5 V
RS Stock No. 176-9016
Mfr. Part No.CY8C4146AXI-S445
$8.735
Each (In a Pack of 2)
units
CY8C4100 TQFP Surface Mount 64 ARM Cortex M0 32bit 64 kB 48MHz 8 kB - 1 2 5 1.8 → 5.5 V
RS Stock No. 177-1237
Mfr. Part No.CY8C4146AZI-S423
$6.97
Each (In a Pack of 2)
units
CY8C4100 TQFP Surface Mount 48 ARM Cortex M0 32bit 64 kB 48MHz 8 kB 1 1 2 2 1.8 → 5.5 V