thuvu
Member level 3
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mt8870 optocoupler
Hi everyone,
I am trying to build a circuit that interfaces with the telephone line. I could use CH1840 DAA for understanding the ring signal and control the hung up anf MT8870 or MT8888 for DTMF receiving and producing.
Unforunately I can't find these ic's in DIGIKEY,MOUSER etc. so if someone knows similar ic's from other companies(more well known) please help.
Thank you in advance
Hi everyone,
I am trying to build a circuit that interfaces with the telephone line. I could use CH1840 DAA for understanding the ring signal and control the hung up anf MT8870 or MT8888 for DTMF receiving and producing.
Unforunately I can't find these ic's in DIGIKEY,MOUSER etc. so if someone knows similar ic's from other companies(more well known) please help.
Thank you in advance