KA8601C

KA8601C INTRODUCTION SPEAKER PHONE WITH SPEECH NETWORK The KA8601C is a monolithic integrated circuit for use in high performance speaker phone system. The KA860lC consists of speaker phone and speech network. Speaker phone includes attenuators, amplifiers, level detectors, attenuator control, hybrid amplifiers, regulator and AGC circuit. Speech network includes transmit amp, receive amp, voltage regulator for dialer, side tone control, and line equalizer. 48-SDIP-600 FEATURES Speaker Phone - Low Operating Voltage (3.0 ~ 6.5V) - High Attenuator Gain Range (52dB) - Improved Sensitivity (Four-point Signal Sensing) - Chip Disable for Active or Standby Operation - Microphone Amp Gain set by External Components Speech Network - Low Operating Voltage (1.5V : speech) - Regulated Voltage for Dialer (Typically 3.3V) - Transmit, Receive, Side Tone Gains set by External Components - Mute Input for DTMF Dialing ORDERING INFORMATION Device KA8601C Package 48-SDIP-600 Operating Temperature - 25°C ~ + 75°C BLOCK DIAGRAM DETO RX1 DETO RX2 DETO TX1 DETO TX2 DETI RX1 DETI RX2 DETI TX1 DETI TX2 RXO ATT DTO- TXO ATT 26 RXI ATT TXI ATT PD RX PD TX MICO GND MICI 47 DTI 36 46 45 44 43 42 41 40 39 38 37 35 34 33 32 31 30 29 28 27 48 25 VCC 24 POWER BNM : Back Noise Monitor 3.3Vreg level detector mic amp level detector RX Attenuator SPEAKER PHONE PART hybrid amp 1 ATTENUATOR CONTROLLER hybrid amp 2 sidetone amp TX amp2 BNM FILTER SPEECH ...