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From: george@wombat.UUCP (George Scolaro)
Newsgroups: sci.electronics
Subject: Re: Need pointer to CMOS Uart
Message-ID: <445@wombat.UUCP>
Date: 18 Mar 90 17:22:28 GMT
References: <53558@microsoft.UUCP> <34002@prls.UUCP> <1990Mar16.055156.19874@utzoo.uucp>
Reply-To: george@wombat.UUCP (George Scolaro)
Organization: Assn. for the prevention of Polar Bears and Kangaroos
Lines: 30

In article <1990Mar16.055156.19874@utzoo.uucp> henry@utzoo.uucp (Henry Spencer) writes:
>In article <34002@prls.UUCP> gordon@prls.UUCP (Gordon Vickers) writes:
>>     Signetics, a division of Philips Components makes the SCC2698 ...
>
>Not to be cynical or anything :-), but given how nice it sounds otherwise,
>and knowing Murphy like I do, I assume it's in one of those zillion-pin

>(I'd be happy to hear that I'm wrong...)

The SCC2698 is available in DIP (big) or PLCC. I have used the PLCC version,
which is 84 pins and has more i/o than the DIP ('cos its got more pins) and
it works very well. In small quantities it is around $25-30. The only
problem with the part (not a bug as such) is that it lacks sufficient
handshake signals. It would be really nice if it had tx/rx/cts/rts and
dcd/dtr. Unfortunately Signetics gave the chip a bucket of general purpose
inputs, but not enough general purpose outputs, so you need an external
latch to take care of the dtr.  The nice part is that it does do hardware
flow control with rts/cts. It's program model is nearly 100% the same as 4
separate SCN2681 Duarts.

The original requestor of info was worried about prototyping with PLCC. What
I have done in the past is to get a normal solder tail PLCC socket and then
push on a PGA wirewrap socket (lots of push) and then you have a PLCC
wirewrap socket.

regards,

-- 
George Scolaro
george@wombat.bungi.com                [37 20 51 N / 122 03 07 W]