18 Sep
2013
18 Sep
'13
10:51 a.m.
Hi Pete,
Anyone got practical experience of substituting for an
8881?
--- The SN7439 is commonly taken as a proper replacement for the DEC8881. I see a couple
7439's available on eBay at the moment. Also, questcomp.com is showing DEC8881 in
stock at $10 each at quantity-two. Some have mentioned substituting 7438 as a lower spec
version. I see from the datasheet that it does have the same schematic as the 7439.
However, it doesn't actually guarantee more than 16mA output sink current.
Steve Lafferty
http://www.tronola.com/