I am looking to get PCB’s and parts to make the SatNOGS Controller and Rotator. I look around Mouser and found most of the parts (although one was Discontinued, but Digi-Key had a direct alternative), other parts were out of stock. One of those was the TC74.
There are other TC74, but they appear to have a different address (?) based on the spec sheets. How critical is it that the address be the exact one or can it be modified in the firmware?
Below is a link to the Spec sheet.
The addresses are on page 9. The one in the BOM says it is 1001 000. The other ones (going up to 7 from 0) changes the last 3 digits of the address.