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Posted

???Hey,frind mixos

I find BT9151 ic in the wire intercom and that i read from

the chip,and there is no more inf. writen on the chip .

About 1200P60 i check it is right that i need . :-*

Thank u.

Posted

You are pretty lucky HA :D . Here is what i found:

BT9151 is equivelant to UM9151 and it is a Pulse Dialer with direct Phone line operation. 4 * 3 matrix keyboard interface. Supply voltage range of 2 to 5.5 V. 22 digit redial memory. Selectable make/break ratio. High speed test capacity.





and this is a usage schematic:



I attach you also the UM9151 Datasheet

UM9151-3.pdf

  • 4 months later...

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