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2 digit DTMF decoder using 8870

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djc

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Hi,
I want to design 2 digit DTMF decoder using 8870 dtmf decoder. Means 00 to 99 should be displayed on two 7 segments. No use of microcontroller.. Using one 7 seg display is quite easy but how to do it with two 7 segment display. CAn anybody suggest some rough schematic.
 

use BCD to S-seg and store data one by one
 

OK thanx ARUN,

I thought of using 4017 decade counter to select the 7 segment display one by one.
 

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