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 digital volume control in MC 33215		  New Topic  Reply to Topic
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DELETED (Inactive)

3 Posts
Posted - Aug 19 2003 :  06:18:41 AM  Show Profile  Reply with Quote
PLEASE TELL ME THE CIRCUIT OF HOW TO USE MC 33215 SPEAKERPHONE IC IN A TELEPHONE WITH dIGITAL VOLUME CONTROL
Please consider this as urgent as i am struck up with this problem

YS
Nobel Prize Winner

USA
1132 Posts
Posted - Aug 19 2003 :  6:06:04 PM  Show Profile  Visit YS's Homepage  Reply with Quote
MC33215 has analog volume control, see datasheet at
http://e-www.motorola.com/files/timing_interconnect_access/doc/data_sheet/MC33215.pdf
You can use a digital potentiometer from Dallas (www.maxim-ic.com), connecting it between VOL pin (pin34 or pin35, depending on package) and ground.
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YS
Nobel Prize Winner

USA
1132 Posts
Posted - Aug 19 2003 :  6:09:36 PM  Show Profile  Visit YS's Homepage  Reply with Quote
Oops.. I copied link from browser window and it did not work. you need to type it as http://e-www. and so on, see previous message, or just search motorola.com for MC33215. Good luck.
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