Digital Circuits and Best Suited MOSFET for 3.3V

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SUMMARY

This discussion focuses on selecting suitable MOSFETs for digital circuits operating at a 3.3V supply voltage (Vdd). Participants emphasize the importance of understanding MOSFET datasheets and recommend looking for low voltage CMOS families that operate within the 2.7-3.6V range. Key considerations include ensuring the 3.3V supply is tightly regulated and the preference for discrete through-hole components for custom circuit board designs. The conversation highlights the need for practical recommendations on specific MOSFET models commonly used in such applications.

PREREQUISITES
  • Understanding of MOSFET characteristics and operation
  • Familiarity with reading MOSFET datasheets
  • Experience with Eagle CAD for circuit design
  • Knowledge of digital circuit design principles
NEXT STEPS
  • Research low voltage CMOS families suitable for 3.3V applications
  • Learn how to interpret MOSFET datasheets effectively
  • Explore common MOSFET models used in digital circuits
  • Investigate techniques for ensuring voltage regulation in circuit designs
USEFUL FOR

Electrical engineering students, hobbyists designing digital circuits, and anyone interested in building custom circuit boards with discrete MOSFET components.

helloworld5
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Hello everyone,

I wanted to make some digital circuits with discrete CMOS components but I do not know how to read these MOSFET datasheets properly and I have no idea which models are good for these kinds of projects (for a 3.3V as Vdd and with ground). I know the characteristics of MOSFETs (3rd year electrical engineering student level) but I do not know the "standard" MOSFETs that would be used in the real world for building digital circuits.

I am planning to etch my own circuit board (I have decent amount of experience with Eagle CAD and soldering) for these digital circuits so discrete through-hole components is very important.

Any information regarding which MOSFET models are often used for digital circuits for voltages around 3.3V would be great!


Thank you.
 
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Hi helloworld5. http://img96.imageshack.us/img96/5725/red5e5etimes5e5e45e5e25.gif

Datasheets will tell you the range of Vdd over which logic IC's will work. Scroll halfway down this page[/color] and you'll see links to families of low voltage (2.7-3.6V) CMOS. I don't know how easy it will be to get those specialist chips. Ordinary CMOS seems to be rated for Vdd down to 3.0V. Will your 3.3V supply be tightly regulated?
 
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