Search found 18 matches

by mikeu
Wed Jun 29, 2005 4:35 am
Forum: General Discussion
Topic: phone line driver ic
Replies: 8
Views: 2608

Re: phone line driver ic

Hi,<p>I'm sending the tones in one direction only using a single pair. Currently there is a burst of several tones that make up a "command". I'm using a standard DTMF tone decoder chip at the receiving end with a processor to make the decisions.<p>Thanks,
Mike
by mikeu
Tue Jun 28, 2005 4:53 pm
Forum: General Discussion
Topic: phone line driver ic
Replies: 8
Views: 2608

phone line driver ic

Hi,<p>Can anyone suggest an line driver ic for the cheap four conductor phone line. I want to send DTMF tones over a distance of at least 1,000 ft.
Could I use an RS-485 chip?
by mikeu
Sat May 21, 2005 5:33 am
Forum: General Discussion
Topic: ami s2559f ic, 16 key keypad
Replies: 0
Views: 842

ami s2559f ic, 16 key keypad

Hi,<p>I'm trying to locate an AMI S2559F DTMF IC.
Also trying to find a 16 key telephone type keypad with a common ground (9 terminals). The keypad will work with the 5089 DTMF generator chip.<p>Thanks