Passive delay lines

[fdiskitup]

I am going mad trying to find a source for 2 passive delay line modules - this type of thing, looks like a logic chip, but is not.



These are part of a S100 RAM card and they are linked to the memory timing.

The bill of materials lists :

9825 possibly made by “Pulse”. Which I think is a passive delay line 14-Dip, 100ns, 100ohm,10 taps. (PCA EP19825)

9828 which I think is a passive delay line 14dip, 200ns, 100ohm, 10 taps. (PCA EP19828)

Seems like PCA and Rhombus were the main producers, but there are quite a few manufacturers.




So my questions are:
1, does anybody know of a parts supplier where these passive tapped delay lines can be found.
So far request for quotes only gets me bulk pricing and I only need 1.

2, can these be substituted with active silicon delay lines.?, i.e. DS1010-100 obviously rerouting pins, and supplying 5V vcc.?

I’m willing to do a “deadbug” if the pins dont match up, since not all the lines are used.

Or any other suggestions?

 

[DeltaDon]

Mouser might have them, but I didn't see DS1010's listed. If not, I found the ones I needed for S-100 DRAM boards on eBay.

 

[fdiskitup]

Mouser might have them, but I didn't see DS1010's listed. If not, I found the ones I needed for S-100 DRAM boards on eBay.

Possible my fundamental understanding is poor, but can I use an active TTL delay line to replace a passive analog delay line?

 

[djg]

Possible my fundamental understanding is poor, but can I use an active TTL delay line to replace a passive analog delay line?

Yes if its being driven by a normal gate and going to normal gates. If not you need to understand how exactly they are using it.

For passive delay lines the last tap will have a terminating resistor(s). If it doesn't drive any logic you don't have to connect anything to it. If it does you may need to pull the resistor(s) if the active chip won't like the load.

 

[fdiskitup]

I found the parts from a company "New Strength Electronic Co., Ltd. Despite some bad reports on the web, they seem legitimate.
They were actually pretty helpful and for $6 per unit + $10 shipping not too bad.
link to supplier site but also email directly for tricky parts.
Hope someone else finds this useful in the future.