Any updated SAW substitutes?

[Tim-Clay]

Both the recommended (AFS20A42-1575.42-T3) and possible substitute (AFS20A02-1575.42-T3) SAW from Abracon are obsolete or not currently being sold. Is there an alternative SAW that will work? Thanks!

[JonasBchrt]

I am afraid I haven't tried any other SAW filter.

For a drop-in replacement, you would want to look for a component with the same footprint and centre frequency. Other parameters - such as bandwidth - are somewhat less important.

In general, the SAW filter isn't strictly necessary, it may well work without one if simply the B and D pin of the SAW filter footprint are shortened together. But I haven't done a thorough evaluation.

[Tim-Clay]

Thanks for the quick response!

I've tried to find a replacement with the same footprint and center frequency, but the only ones I can find have a voltage maximum of 3V, too low for this circuitry it seems. I'm reluctant to modify the circuitry to accommodate a smaller footprint or different package...

I'm also hesitant to wire this without a SAW, given the habitat and species I'm working, the receivers would likely benefit greatly from filtering unwanted radio signals.

[JonasBchrt]

Maximum voltage of 3 V should be fine.
Assuming that this is the max rating between the filter ports, then this should be plenty, since this is a differential signal.