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. 660-6654
Mfr. Part No.TMS320F28335PGFA
HK$256.87
Each
units
Delfino LQFP Surface Mount 176 C28x 32bit 512 kB 150MHz 68 kB - 1 16 1 3.135 → 3.465 V
RS Stock No. 923-3672
Mfr. Part No.TMS320F28335PGFA
HK$232.008
Each (In a Tray of 40)
units
Delfino LQFP Surface Mount 176 C28x 32bit 512 kB 150MHz 68 kB - 1 16 1 3.135 → 3.465 V
RS Stock No. 162-7268
Mfr. Part No.LM3S1968-IQC50-A2
HK$157.765
Each (In a Tray of 90)
units
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 Stock No. 145-7817
Mfr. Part No.MSP430G2403IN20
HK$17.624
Each (In a Tube of 20)
units
MSP430 PDIP Through Hole 20 MSP430 16bit 8 kB 16MHz 512 B - - - 1 1.8 → 3.6 V
RS Stock No. 162-8230
Mfr. Part No.MSP430F47187IPZ
HK$94.214
Each (In a Tray of 90)
units
MSP430 LQFP Surface Mount 100 MSP430 16bit 116 kB 16MHz 8 kB - - 7 4 1.8 → 3.6 V
RS Stock No. 819-4872
Mfr. Part No.MSP430G2302IPW14
HK$13.926
Each (In a Pack of 5)
units
MSP430 TSSOP Surface Mount 14 MSP430 16bit 4 kB 16MHz 256 B - - 8 1 1.8 → 3.6 V
RS Stock No. 121-9257
Mfr. Part No.MSP430F417IPM
HK$38.337
Each (In a Tray of 160)
units
MSP430 LQFP Surface Mount 64 MSP430 16bit 32 kB, 256 B 8MHz 1 kB - 2 - - 1.8 to 3.6 V
RS Stock No. 923-6851
Mfr. Part No.MSP430F2418TPM
HK$79.889
Each (In a Tray of 160)
units
MSP430 LQFP Surface Mount 64 MSP430 16bit 116 kB, 256 B 16MHz 8 kB - 2 8 4 1.8 → 3.6 V
RS Stock No. 817-6234
Mfr. Part No.MSP430F5510IRGCT
HK$38.43
Each
units
MSP430 VQFN Surface Mount 64 MSP430 16bit 32 kB 25MHz 4 + 2 kB 1 - 8 4 1.8 → 3.6 V
RS Stock No. 619-5794
Mfr. Part No.MSP430F169IPM
HK$123.48
Each
units
MSP430 LQFP Surface Mount 64 MSP430 16bit 60 kB, 256 B 8MHz 2 kB - 2 8 2 1.8 → 3.6 V
RS Stock No. 162-8272
Mfr. Part No.MSP430G2402IPW14
HK$11.628
Each (In a Tube of 90)
units
MSP430 TSSOP Surface Mount 14 MSP430 16bit 4 kB 16MHz 256 B - - 8 1 1.8 → 3.6 V
RS Stock No. 145-0524
Mfr. Part No.MSP430G2231IPW14
HK$11.639
Each (In a Tube of 90)
units
MSP430 TSSOP Surface Mount 14 MSP430 16bit 2 kB 16MHz 128 B - - 8 - 1.8 → 3.6 V
RS Stock No. 145-7021
Mfr. Part No.MSP430G2432IPW20
HK$13.18
Each (In a Tube of 70)
units
MSP430 TSSOP Surface Mount 20 MSP430 16bit 8 kB 16MHz 256 B - - 8 2 1.8 → 3.6 V
RS Stock No. 914-3077
Mfr. Part No.TM4C1294NCPDTI3
HK$157.87
Each
units
ARM9 TQFP Surface Mount 128 ARM Cortex M4F 32bit 1.024 MB 120MHz 256 kB 1 1 20 - 3.3 V
RS Stock No. 819-4756
Mfr. Part No.MSP430F5310IPT
HK$32.085
Each (In a Pack of 2)
units
MSP430 LQFP Surface Mount 48 MSP430 16bit 32 kB 25MHz 6 kB - - 12 4 1.8 → 3.6 V
RS Stock No. 818-4872
Mfr. Part No.TMS320F28334PGFA
HK$206.57
Each
units
Piccolo LQFP Surface Mount 176 C28x 32bit 256 kB 150MHz 68 kB - 1 16 1 3.3 V
RS Stock No. 709-4061
Mfr. Part No.MSP430F417IPM
HK$52.18
Each
units
MSP430 LQFP Surface Mount 64 MSP430 16bit 32 kB, 256 B 8MHz 1 kB - 2 - - 1.8 → 3.6 V
RS Stock No. 145-7250
Mfr. Part No.CC2650F128RSMT
HK$38.512
Each (On a Reel of 250)
units
CC26xx VQFN Surface Mount 32 ARM Cortex M0, ARM Cortex M3 16bit 128 kB 48MHz 20 kB - - 8 - 3.8 (Maximum) V
RS Stock No. 817-6225
Mfr. Part No.MSP430F5510IPT
HK$37.64
Each
units
MSP430 LQFP Surface Mount 48 MSP430 16bit 32 kB 25MHz 4 + 2 kB 1 - 8 4 1.8 → 3.6 V
RS Stock No. 162-9868
Mfr. Part No.TM4C1294NCPDTI3
HK$142.709
Each (In a Tray of 90)
units
ARM9 TQFP Surface Mount 128 ARM Cortex M4F 32bit 1.024 MB 120MHz 256 kB 1 1 20 - 3.3 V