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庫存編號 865-6263
製造零件編號EFM8BB10F2G-A-QFN20
TWD12
/個 (每包:30個)
單位
EFM8BB QFN Surface Mount 20 CIP-51 8bit 2 kB 25MHz 256 B - - 15 1 2.2 → 3.6 V
RS庫存編號 666-8630
製造零件編號PIC16F722-I/SP
BrandMicrochip
TWD51
/個 (每包:2個)
單位
PIC16F SPDIP Through Hole 28 PIC 8bit 2048 x 14 words 20MHz 128 B - 2 11 1 1.8 to 5.5 V
RS庫存編號 144-9195
製造零件編號PIC16F722-I/SP
BrandMicrochip
TWD50
毎管:15 個
單位
PIC16F SPDIP Through Hole 28 PIC 8bit 2048 x 14 words 20MHz 128 B - 2 11 1 1.8 → 5.5 V
RS庫存編號 169-0180
製造零件編號EFM8BB10F2G-A-QFN20
TWD12
毎管:120 個
單位
EFM8BB QFN Surface Mount 20 CIP-51 8bit 2 kB 25MHz 256 B - - 15 1 2.2 → 3.6 V
RS庫存編號 921-4545
製造零件編號ATMEGA328P-PU
BrandMicrochip
TWD99
毎管:14 個
單位
ATmega PDIP Through Hole 28 AVR 8bit 1 kB, 32 kB 20MHz 2 kB - 3 6 1 1.8 → 5.5 V
RS庫存編號 144-9117
製造零件編號PIC16C54C-04/P
BrandMicrochip
TWD50
毎管:25 個
單位
PIC16C PDIP Through Hole 18 PIC 8bit 512 x 12 words 4MHz 25 B - - - - 2.5 → 5.5 V
RS庫存編號 328-2025
製造零件編號PIC16C54C-04/P
BrandMicrochip
TWD54
單位
PIC16C PDIP Through Hole 18 PIC 8bit 512 x 12 words 4MHz 25 B - - - - 2.5 → 5.5 V
RS庫存編號 162-7268
製造零件編號LM3S1968-IQC50-A2
TWD534
Each (In a Tray of 90)
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Stellaris LQFP Surface Mount 100 ARM Cortex M3 32bit 256 kB 50MHz 64 kB - 3 8 2 2.25 → 2.75 V, 3 → 3.6 V
RS庫存編號 709-4241
製造零件編號LM3S1968-IQC50-A2
TWD649
單位
Stellaris LQFP Surface Mount 100 ARM Cortex M3 32bit 256 kB 50MHz 64 kB - 3 8 2 2.25 → 2.75 V, 3 → 3.6 V
RS庫存編號 399-410
製造零件編號PIC16F887-I/P
BrandMicrochip
TWD77
/個 (每包:5個)
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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庫存編號 829-1024
製造零件編號R5F10WMGAFB#30
TWD126
單位
RL78 LQFP Surface Mount 80 RL78 16bit 4 kB, 128 kB 24MHz 8 kB - 1 12 2 1.6 → 5.5 V
RS庫存編號 714-1079
製造零件編號STM32F103RCT6
TWD196
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STM32F LQFP Surface Mount 64 ARM Cortex M3 32bit 256 kB 72MHz 48 kB 1 x Device 2 16 3 2 → 3.6 V
RS庫存編號 814-3067
製造零件編號PIC12F1571-I/P
BrandMicrochip
TWD22
/個 (每包:10個)
單位
PIC12F PDIP Through Hole 8 PIC 8bit 1 kwords 16MHz 128 B 1 3 4 - 5.5 V
RS庫存編號 145-9607
製造零件編號STM32F103RCT6
TWD157
Each (In a Tray of 160)
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STM32F LQFP Surface Mount 64 ARM Cortex M3 32bit 256 kB 72MHz 48 kB 1 x Device 2 16 3 2 → 3.6 V
RS庫存編號 724-9716
製造零件編號STM32F107RBT6
TWD142
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STM32F LQFP Surface Mount 64 ARM Cortex M3 32bit 128 kB 72MHz 64 kB 1 x OTG 1 16 3 2 → 3.6 V
RS庫存編號 145-9610
製造零件編號STM32F107RBT6
TWD159
Each (In a Tray of 160)
單位
STM32F LQFP Surface Mount 64 ARM Cortex M3 32bit 128 kB 72MHz 64 kB 1 x OTG 1 16 3 2 → 3.6 V
RS庫存編號 165-1960
製造零件編號PIC12F1571-I/P
BrandMicrochip
TWD20
毎管:60 個
單位
PIC12F PDIP Through Hole 8 PIC 8bit 1 kwords 16MHz 128 B 1 3 4 - 5.5 V
RS庫存編號 876-6714
製造零件編號PIC16F887-I/P
BrandMicrochip
TWD75
毎管:10 個
單位
PIC16F PDIP Through Hole 40 PIC 8bit 8192 words 20MHz 368 B - 2 14 1 2 to 5.5 V
RS庫存編號 165-6817
製造零件編號STM32F207VFT6
TWD265
Each (In a Tray of 540)
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STM32F LQFP Surface Mount 100 ARM Cortex M3 32bit 768 kB 120MHz 128 kB 2 2(4 x 16 bit) 16 3 3.6 V
RS庫存編號 828-3584
製造零件編號R5F10WMEAFB#30
TWD125
/個 (每包:2個)
單位
RL78 LQFP Surface Mount 80 RL78 16bit 64 kB 24MHz 4 kB - - 12 2 1.6 → 5.5 V