TEA7540 - ST Microelectronics

TEA7540 HANDSFREE CONTROLLER

This 28 pins IC is an innovative approach to quality handsfree telephone sets. It results from an extensive research on speech signal. PIN CONNECTION (top view) GND CS OUTE ATTE HYST1 HYST2 TIM CCE CE3 CE2 CE1 MICOUT INE VREF 1 2 3 4 5 6 7 8 9 10 11 12 13 14 D93TL005 28 27 26 25 24 23 22 21 20 19 18 17 16 15 V+ IREF OUTR ATTR ATR VOL AMP SUP AMP IN CCR C.

Features

9 20 21 22 23 24 25 26 27 28 Name GND CS OUTE ATTE HYST1 HYST2 TIM CCE CE3 CE2 CE1 MICOUT INE Vref INR RECOUT CR1 CR2 CR3 CCR AMP IN AMP SUP VOL ATR ATTR OUTR Iref V+ Ground Chip Select Transmit Attenuator Output Transmit Attenuator Input Transmit Channel Hysteresis Receive Channel Hysteresis RC Timer Time Constant of the Transmit Signal Compressor Transmit Background Noise Memorization Output Transmit Peak Detector Output Transmit Rectifier Input Transmit Signal Compressor Output Transmit Signal Compressor Input V+/2 - Reference Voltage Receive Signal Compressor Input Receive Signal Compresso.