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Send & Receive DTMF with MT8880

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It looks like you have posted this twice in this area. Are you requesting the data sheet for this device? If so, there is a different area where you might have more luck. I will remove the duplicate post.
MP

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If you are searching the datasheet, here it is:

Download MT8880 Datasheet

Also here is some projects that uses this DTMF Tranceiver:

http://www.technology.niagarac.on.ca/students/m/smcgrath/
http://hem.passagen.se/communication/ir.html

so you can take some ideas on how to use it.

Also here is a DTMF basic guide:

http://www.hw.cz/english/docs/dtmf/dtmf_doc.html

Hope that info helps you a bit.

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