Then why don't you look at the complete speakerphone schematic in its datasheet? Then look at the complete speakerphone schematic in the datasheet of the better MC34118.
I don't think the MC34018 is available anymore. I made the circuit in the datasheet in 1982 and it worked perfectly.
The Cirrus Logic full-duplex IC operates like the full-duplex telephone boardroom conferencing and video conferencing systems I worked with in the 90's.
The Philips voice-switched IC operates like the old Motorola MC34018 speakerphone IC.
The Amtel IC operates like the old Motorola MC34118 IC.
Thanx for your reply.
I think I can go with Atmel or Philps Voice switched speakerphone IC.
audioguru said:
The Cirrus Logic full-duplex IC operates like the full-duplex telephone boardroom conferencing and video conferencing systems I worked with in the 90's.
The Philips voice-switched IC operates like the old Motorola MC34018 speakerphone IC.
The Amtel IC operates like the old Motorola MC34118 IC.