Philips Electronics
Speech and loudspeaker amplifie IC with auxiliary inputs/outputs and analog multiplexer
Unspecified
Tone Ringer IC (14-Pin Plastic Package TO-116)
Philips Electronics
Versatile telephone transmission circuit with dialler interface
Philips Electronics
Speech and listening-in IC
Unspecified
13 BIT SERIES PARALLEL CONVERTER
Contek Microelectronics
LOW VOLTAGE TELEPHONE TRANSMISSION CIRCUIT WITH DIALLER INTERFACE
Temic Semiconductors
Simple phase control circuit