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<?xml-stylesheet type="text/xsl" href="https://community.arm.com/utility/feedstylesheets/rss.xsl" media="screen"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/" xmlns:wfw="http://wellformedweb.org/CommentAPI/"><channel><title>Dual tone multi frequency</title><link>https://community.arm.com/developer/tools-software/tools/f/keil-forum/18516/dual-tone-multi-frequency</link><description> hi 
please suggest me a good dtmf chip compatible with 89c51. 
thanks in advance </description><dc:language>en-US</dc:language><generator>Telligent Community 10</generator><item><title>RE: Dual tone multi frequency</title><link>https://community.arm.com/thread/148755?ContentTypeID=1</link><pubDate>Mon, 16 Jan 2006 07:51:34 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:ecf52329-a57a-4d30-a188-3ab1398c9d6c</guid><dc:creator>Andy Neil</dc:creator><description>&lt;p&gt;&lt;i&gt;&amp;quot;MT88xx such as MT8870&amp;quot;&lt;/i&gt;&lt;br /&gt;
&lt;br /&gt;
They&amp;#39;re Zarlink parts - see URL above&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: Dual tone multi frequency</title><link>https://community.arm.com/thread/123096?ContentTypeID=1</link><pubDate>Mon, 16 Jan 2006 07:20:53 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:1d450311-2d58-41b6-8fe2-cb422d848b52</guid><dc:creator>erik  malund</dc:creator><description>&lt;p&gt;I have no knowledge on said subject, but everything I have seen uses MT88xx such as MT8870&lt;br /&gt;
&lt;br /&gt;
Erik&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: Dual tone multi frequency</title><link>https://community.arm.com/thread/111859?ContentTypeID=1</link><pubDate>Sat, 14 Jan 2006 06:32:02 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:ead3b97b-f732-4de7-aedd-0b4ff33cf400</guid><dc:creator>Andy Neil</dc:creator><description>&lt;p&gt;go to &lt;a href="http://www.zarlink.com/" target="_blank"&gt;http://www.zarlink.com/&lt;/a&gt; and type &amp;quot;DTMF&amp;quot; into the &amp;#39;Search&amp;#39; box...&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: Dual tone multi frequency</title><link>https://community.arm.com/thread/84509?ContentTypeID=1</link><pubDate>Sat, 14 Jan 2006 06:21:47 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:ea05b1eb-b51d-401d-9393-6bb87e9443d6</guid><dc:creator>wdg kaja</dc:creator><description>&lt;p&gt;look at &lt;a href="http://www.holtek.com.tw/english/products/comm_2.htm" target="_blank"&gt;http://www.holtek.com.tw/english/products/comm_2.htm&lt;/a&gt;&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: Dual tone multi frequency</title><link>https://community.arm.com/thread/73736?ContentTypeID=1</link><pubDate>Mon, 26 Dec 2005 13:06:09 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:97fe59df-4221-4342-a1a9-cc41f6855ec9</guid><dc:creator>Mudassar Mehboob</dc:creator><description>&lt;p&gt;Either Transciever or Detector&amp;amp;Generator seperately&lt;br /&gt;
thanks&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: Dual tone multi frequency</title><link>https://community.arm.com/thread/45281?ContentTypeID=1</link><pubDate>Sun, 25 Dec 2005 15:21:32 GMT</pubDate><guid isPermaLink="false">dd9e70c8-6d3c-4c71-b136-2456382a7b5c:a972a714-bca7-4da7-bb8f-3a8352ac46c0</guid><dc:creator>Andy Neil</dc:creator><description>&lt;p&gt;detector or generator?&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item></channel></rss>