Can the PT2399 be a sub for BBD chips such as SAD1024,other obsolete delay ICs?

[ZZ$$$$$$$]

 :icon_question:Since the SAD1024 is pretty much obsolete,could the PT2399 be used or configured in a way so it could be used to
replace broken BBD chips in old Electric Mistresses,ADA flangers,older flangers,choruses,basically any vintage stompbox that used
BBD(bucket brigade analog delay IC s such as the SAD1024,512 etc.

[nocentelli]

No. It cannot be "dropped in", or even used with a few extra parts.

Since the SAD1024 is pretty much obsolete,could the PT2399 be used or configured in a way so it could be used.....

...if "configured" means effectively redesigning the original effect to work with a digital chip, then yes. I have seen diy delay designs supposedly based on original analogue BBD circuits like the BOSS DM2 and the EHX DMM, but they just used some part of the companding or filtering of the original circuit; they haven't simply used a digital chip in place of the analog one.

[Mark Hammer]

1) Differentiate between "obsolete" and "unavailable".  Once a chip goes out of production, it is technically "obsolete", however that doesn't mean it is entirely unavailable.  There are still "micro-lots" of NOS of things that haven't been made since before you were born that still remain "available", albeit at high prices and in quantities limited enough to preclude making commercial products with them.

2) The desirability of theRreticon chips, in particular, stemmed from the ease with which certain ones could be coaxed to provide ultra-short delay times - a necessity for flanging.  Should one be employing longer delay times, for things like chorus effects or echo, then yes, you are correct in proposing that a 2399 might be a reasonable sub.  The circuit would obviously have to be adapted, since these are not drop-in replacements, but we have seen things here like daughterboards for the old green MXR Analog Delay pedal, that used a 2399 instead of the original Reticon chip/s.