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Thread: EP8700 5Tap TTL Compatible High Speed Active Delay Lines DIP8?

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    Woz's Avatar
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    Default EP8700 5Tap TTL Compatible High Speed Active Delay Lines DIP8?

    Since the EP8700 chips are so expensive, retailing at $42-30 currently on eBay I was searching for a cheaper alternative. Dallas DS1000 - 50 at $4.79-3.38, would this work by removing the pins marked as NC = Not Connected pins 2, 3, 5, 9, 11 and 13?
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    LONG LIVE RETROPIE! levo-ace's Avatar
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    Looking at the datasheets it would work but you would need the DS1000-25 to replace the EP8700 NOT the -50. The EP8700 has a total delay of 25 ( 5 for each point ) as does the DS1000-25. The DS1000-50 has a total delay of 50 (10 for each point).

    Please let me know how you get on as this could help others!
    Last edited by levo-ace; 21st May 2021 at 11:54.
    Amiga 500 , 500+ , 600 , 1200 , 2000 lots of scsi drives tape streamers cd dvd jazz zip mo.
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    Thanks, I've just messaged the company to see if they can get a DS1000 - 25. I've also found these 7.26 for 20:- [20pcs] AD14AA025 Delay Line 25 ns DIP14
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    Link https://www.ebay.co.uk/itm/393037566...UAAOSw5DlfxRyM

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    I can confirm a DS1000-25 is compatible. I have just put one in my A3640 Rev 3.2 mod + NoWaitState mod board and the system appears to be operating correctly.

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    LONG LIVE RETROPIE! levo-ace's Avatar
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    Glad to hear it! Another replacement part for the AMIGA!
    Amiga 500 , 500+ , 600 , 1200 , 2000 lots of scsi drives tape streamers cd dvd jazz zip mo.
    too many others brands to list and Raspberry Pi , Arduino.

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