Finding Parts on Digi-Key

Owned by Taiping Li
May 13, 2019

We mostly source our components from Digikey and Mouser. In this example, you will be looking for a 2-Channel Inverter with a schmitt trigger input. This will be powered by the 3.3V supply, so we should make sure that it can operate at 3.3V. For most components, we try and use Automotive Qualified (AEC-Q) components whenever possible. These components are stress tested by the manufacturer to meet automotive reliability requirements. This is however, optional so use your best judgement as to if we should use a AEC-Q component or not. 

  1. Search Schmitt trigger on Digikey. Since we want a logic gate/inverter, choose the first one: Logic - Gates and Inverters

  2. Some basic filters that you can apply every time for pretty much any components:
  • Stock Status: In Stock
  • For most IC/Resistor/Capacitor/Inductor/Diodes/Transistors: Packaging: Cut-Tape
  • Part Status: Active



3. Now we can add filters for our specific component, namely:

  • Series: Any that says Automotive in it
  • Number of Circuits: 2
  • Logic type: Inverter

4. After applying the filters, we have 8 options remaining. We can now either filter by Voltage - Supply to make sure they work with 3.3 V inputs, or we can just sort by price and look at the cheapest ones available to see if they work for our purpose.

The first component when I sorted by price was the NXP 74LVC2G14GW-Q100H. Looking at the datasheet, we should make sure that the part will work for our purposes:

Can it be powered by 3.3V and interface with 3.3V logic? 

Yes, 3.3 V is within the recommended supply voltage range. So this should work.