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Identifying components from CALLER ID device...

Discussion in 'Electronic Components' started by Chaos Master, Feb 18, 2004.

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  1. Chaos Master

    Chaos Master Guest

    I opened a dead caller ID device today, and started to look for
    datasheets of components. I've found of the main DTMF IC (HT9170,
    Holtek), but I can't identify what are those:

    CNR070271K (ZN1 - looks like either Zener or MOV) - Google gives 0
    results
    2A104K (capacitor? not electrolytic, methinks, as it's not round)
    F-358M (the M may as well be a /1 as it's a really tiny surface mount
    part).

    PS: I am accessing from Google Groups as news.cis.dfn.de seems to be
    shot (refuses passwords). Duh.
     
  2. A simple 100nF capacitor. The 104 is 1 and 0 followed by four 0 and
    with pF as the unit.
    Probably a 3.58MHz ceramic oscillator or crystal.
    Are you a participant of the "DFNNetNews" project (DNN)? If not, you
    should not be using news.cis.dfn.de any more. As announced in July 2003
    the news.cis.dfn.de server has now been split and you should probably
    be using the news.individual.net server.

    See < http://news.cis.dfn.de/serversplit-en.html >.
     
  3. Chaos Master

    Chaos Master Guest

    Thanks. I remembered seeing this "syntax" for capacitor names in a
    clock radio, but I didn't remember how it was correct.
    Exact. Reading the datasheet for HT9170 (Holtek IC, main DTMF decoder)
    it became clear.
    I was using news.cis.dfn.de 'til Monday (16/02). I've sent a
    "subscription request" to the news.individual.net folks but nah,
    nothing. I had my n.c.dfn.de account since 2001. :(
     
  4. You don't need to resubscribe. Just change the address from
    news.cis.dfn.de to news.individual.net. They probably hasn't
    answered because they are drowning in requests from users that
    haven't read the announcement or understood it.
     
  5. Chaos Master

    Chaos Master Guest

    Eu não acredito que Goran Larsson escreveu:
    It was because I subscribed using my old e-mail account.
    I changed the server and it seems to work OK right now.
    At least I can read offline using Gravity!

    --
    by Chaos Master® - MSN:

    "A Elbereth Gilthoniel, silivren penna miriel o menel aglar elenath!
    Na-chaered palan-diriel o galadhremmin ennorath,
    Fanuilos, le linnathon nef aear, si nef aearon!" - The Lord of the Rings

    Linux User #327480 / GNU-Win32 / Cygwin
     
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