> Dear Chipdir members,
> We are looking for a single-chip, intended to be used as an audio fsk
modulator (fsk modem). Half duplex.
> Searching the internet, we found the TCM3105, from Texas. But this chip is
not produced by Texas anymore, and it was too slow (1200 bps).
> Does anyone know another one ?
> Any comments welcome.
> Best regards,
Paulo, look in the old 2400/9600 modem/fax boards you can find here in
Brazil, there is the RC224F or something like this, an excellent modem with
everything embeeded but the DAA. Try to search in www.ustr.net, if I'm not
mistaken, there is an application note, schematic and even a kit sold by
Wagner Lipinhaski using this chip
Best regards,
Alexandre Souza
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