I'm trying to build a DTMF decoder using the CM8870 DTMF decoder IC. I made the project on a breadboard. But the decoding never works!! On powerup, it displays a random BCD output on it's 5 output pins. And then that Outputs stays high till I turn the power off. I used the exact circuit here + a few more decoupling capacitors too.
I'm dead sure about the connections of the circuit. And the clock ( 3.579545 MHz ) is working fine too.. What maybe the problem here? Anybody could help?

I'm dead sure about the connections of the circuit. And the clock ( 3.579545 MHz ) is working fine too.. What maybe the problem here? Anybody could help?