Looking for TC74 Temperature Sensor

parts help
1

Hi,
I am looking for a TC74 Part, TO-220
It is found in adafruit’s website (product 4375) and https://www.microchip.com/en-us/product/tc74. Datasheet: https://ww1.microchip.com/downloads/aemDocuments/documents/APID/ProductDocuments/DataSheets/21462D.pdf

Any help is appreciated :slight_smile:

2

This part should do what you want.

tc74.fzpz (4.6 KB)

Peter

4

Thanks for the part!

I am also attempting to create the SOT-23 version of it, but I have no idea how to go about with the pcb view.

Here is the part (
TC74_SOT-23_WIP.fzpz (8.0 KB)). Any help is appreciated!

5

To make a sot23 version you need to change both the pcb svg and the .fzp file (I don’t believe you can change the .fzp file in parts editor if that is what you are using.) This part implements the SOT23 variant:

TC74-SOT23.fzpz (4.6 KB)

The .fzp file needs to change from

    <connector name="Pin 2" type="male" id="connector1">
      <description>SDA</description>
      <views>
        <breadboardView>
          <p svgId="connector1pin" layer="breadboard"/>
        </breadboardView>
        <schematicView>
          <p svgId="connector1pin" layer="schematic" terminalId="connector1terminal"/>
        </schematicView>
        <pcbView>
          <p svgId="connector1pin" layer="copper0"/>
          <p svgId="connector1pin" layer="copper1"/>
        </pcbView>
      </views>

to

    <connector name="Pin 2" type="male" id="connector1">
      <description>GND</description>
      <views>
        <breadboardView>
          <p svgId="connector1pin" layer="breadboard"/>
        </breadboardView>
        <schematicView>
          <p svgId="connector1pin" layer="schematic" terminalId="connector1terminal"/>
        </schematicView>
        <pcbView>
          <p svgId="connector1pad" layer="copper1"/>
        </pcbView>
      </views>
    </connector>

ror all the pins. I used connector1 here because it is one of the pins that has changed pin numbers. You will note you need to delete the copper0 definition (as the new part is SMD) and create a new pcb svg file which reflects the sot23 layout (with pad replacing pin in the connector name in both the svg and the fzp file.) Unzipping the .fzpz file will get you the new pcb svg file… As well before ordering boards you need to print out the pcb footprint at 1:1 scale and compare it to a real part to make sure the pads are correct (I think they are from the data sheet but a physical test is always best!)

Peter

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