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From: kroberts@ecst.csuchico.edu (Kevin Roberts)
Newsgroups: sci.electronics
Subject: NEEDED: info on MM5439N uP compatible PLL system I.C.
Message-ID: <1991May15.204746.8759@ecst.csuchico.edu>
Date: 15 May 91 20:47:46 GMT
Sender: news@ecst.csuchico.edu (USENET)
Distribution: usa
Organization: California State University, Chico
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Hello!
        I am trying to get some preliminary design ideas together
for a school project and I came across a description of a "uP
compatible PLL system" integrated circuit in the D.A.T.A. catalogs.
From the brief diagram shown, it appears to be what I need for my
project.  I phoned National Semiconductor, while unable to provide any
information over the phone specific to this integrated circuit, very
kindly sent me their 1990 Semiconductor Master Selection Guide.
Unfortunately, it did not include anything about the MM5439N integrated
circuit.  I guess I can assume that it is not in production any
longer.

        Before I let this die, I am going to make one last effort
and request anyone in netland who may have a data sheet on this part
and/or even the part itself(!) to drop me an email note.  I assume that
it might be described in the MOS/LSI databook.  (I only have the 1977
issue).  Sigh.

        As a side note, does anyone know where to get a 74LS/HC/HCT297
digital PLL integrated circuit without the $100.00 minimum order headaches?

        I am indebted to all who respond.

--
#include <stdio.h>                            Kevin Roberts
#include "sTd.dIsClAiMeR"                     kroberts@cscihp.ecst.csuchico.edu
main()  {
   float x=1; printf("Just my $%.2f.\n",x/50);  }