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. 916-3731
Mfr. Part No.PIC16F18323-I/P
BrandMicrochip
$1.599
Each (In a Pack of 10)
units
PIC16F PDIP Through Hole 14 PIC 8bit 3.5 kB 32MHz 256 B - 1 11 - 2.3 → 5.5 V
RS Stock No. 165-4142
Mfr. Part No.PIC16F18323-I/P
BrandMicrochip
$1.344
Each (In a Tube of 30)
units
PIC16F PDIP Through Hole 14 PIC 8bit 3.5 kB 32MHz 256 B - 1 11 - 2.3 → 5.5 V
RS Stock No. 165-4174
Mfr. Part No.PIC16F18313-I/P
BrandMicrochip
$1.187
Each (In a Tube of 60)
units
PIC16F PDIP Through Hole 8 PIC 8bit 3.5 kB 32MHz 256 B - 1 5 - 2.3 → 5.5 V
RS Stock No. 916-3734
Mfr. Part No.PIC16F18313-I/P
BrandMicrochip
$1.424
Each (In a Pack of 10)
units
PIC16F PDIP Through Hole 8 PIC 8bit 3.5 kB 32MHz 256 B - 1 5 - 2.3 → 5.5 V
RS Stock No. 623-0803
Mfr. Part No.PIC18F4550-I/P
BrandMicrochip
$9.97
Each
units
PIC18F PDIP Through Hole 40 PIC 8bit 32 kB, 256 B 48MHz 2.048 kB 1 x Device 2 13 1 4.2 to 5.5 V
RS Stock No. 887-7142
Mfr. Part No.PIC18F4550-I/P
BrandMicrochip
$9.677
Each (In a Tube of 10)
units
PIC18F PDIP Through Hole 40 PIC 8bit 32 kB, 256 B 48MHz 2.048 kB 1 x Device 2 13 1 4.2 to 5.5 V
RS Stock No. 467-1690
Mfr. Part No.PIC16F877A-I/P
BrandMicrochip
$11.82
Each
units
PIC16F PDIP Through Hole 40 PIC 8bit 14.3 kB, 256 B 20MHz 368 B - 2 8 1 4 → 5.5 V
RS Stock No. 887-7139
Mfr. Part No.PIC16F877A-I/P
BrandMicrochip
$8.171
Each (In a Tube of 10)
units
PIC16F PDIP Through Hole 40 PIC 8bit 14.3 kB, 256 B 20MHz 368 B - 2 8 1 4 → 5.5 V
RS Stock No. 876-6714
Mfr. Part No.PIC16F887-I/P
BrandMicrochip
$3.812
Each (In a Tube of 10)
units
PIC16F PDIP Through Hole 40 PIC 8bit 8192 words 20MHz 368 B - 2 14 1 2 to 5.5 V
RS Stock No. 165-4083
Mfr. Part No.PIC32MX170F256B-I/SP
BrandMicrochip
$5.575
Each (In a Tube of 15)
units
PIC32MX SPDIP Through Hole 28 PIC 32bit 256 + 3 kB 50MHz 64 kB - 1 10 2 2.3 → 3.6 V
RS Stock No. 623-0487
Mfr. Part No.PIC16F88-I/P
BrandMicrochip
$6.45
Each
units
PIC16F PDIP Through Hole 18 PIC 8bit 7.168 kB, 256 B 20MHz 368 B - 1 7 1 4 → 5.5 V
RS Stock No. 165-1938
Mfr. Part No.PIC12F1572-I/P
BrandMicrochip
$0.979
Each (In a Tube of 60)
units
PIC12F PDIP Through Hole 8 PIC 8bit 3.5 kB 16MHz 256 B 1 1 4 - 2.3 → 5.5 V
RS Stock No. 792-6013
Mfr. Part No.STM32F405RGT6TR
$20.49
Each
units
STM32F LQFP Surface Mount 64 ARM Cortex M4 32bit 1.024 MB 168MHz 192 kB 2 2 16 3 3.6 V
RS Stock No. 920-6456
Mfr. Part No.STM32F405RGT6
$13.345
Each (In a Tray of 160)
units
STM32F LQFP Surface Mount 64 ARM Cortex M4F 32bit 1.024 MB 168MHz 4 kB, 192 kB 1 x Device, 1 x Host, 1 x OTG 1 16 3 1.8 → 3.6 V
RS Stock No. 399-410
Mfr. Part No.PIC16F887-I/P
BrandMicrochip
$2.952
Each (In a Pack of 5)
units
PIC16F PDIP Through Hole 40 PIC 8bit 256 B, 8192 x 14 words 20MHz 368 B - 2 14 1 2 to 5.5 V
RS Stock No. 775-3900
Mfr. Part No.R7F0C30542ESP#AC0
$0.341
Each (In a Pack of 25)
units
R7F0C30 SSOP Surface Mount 16 78K0 8bit 16 kB 10MHz 768 B - - 6 - 1.8 → 5.5 V
RS Stock No. 110-7088
Mfr. Part No.STM32L051K8T6
$4.44
Each (In a Pack of 2)
units
STM32 LQFP Surface Mount 32 ARM Cortex M0+ 32bit 64 kB 32MHz 8 kB - - 10 - 1.65 → 3.6 V
RS Stock No. 122-5444
Mfr. Part No.R5F100GCGFB#30
$4.72
Each (In a Pack of 2)
units
RL78/G13 LFQFP Surface Mount 48 RL78 16bit 4 (Data Flash) kB, 32 (Flash ROM) kB 32MHz 2 kB - - 10 - 2.4 → 5.5 V
RS Stock No. 807-3823
Mfr. Part No.PIC12F1572-I/P
BrandMicrochip
$1.082
Each (In a Pack of 10)
units
PIC12F PDIP Through Hole 8 PIC 8bit 3.5 kB 16MHz 256 B 1 1 4 - 2.3 to 5.5 V
RS Stock No. 145-9654
Mfr. Part No.STM32F373C8T6
$5.506
Each (In a Tray of 250)
units
STM32F LQFP Surface Mount 48 ARM Cortex M4 32bit 64 kB 72MHz 16 kB 1 1 x 16 bit - 3 3.6 V