FEATURES
: Complete CODEC and FILTER system including: PCM ANALOG TO DIGITAL AND DIGITAL TO ANALOG CONVERTERS POWERFUL ANALOG FRONT END CAPABLE TO INTERFACE DIRECTLY: - Microphone Dynamic, Piezo or Electrete - Earpiece down to 100Ω or up to 150nF - Loudspeaker down to 50Ω or Buzzer up to 600nF. TRANSMIT BAND-PASS FILTER ACTIVE RC NOISE FILTER RECEIVE LOW-PASS FILTER WITH SIN X/X CORRECTION MU-LAW OR A-LAW SELECTABLE COMPANDING CODER AND DECODER PRECISION VOLTAGE REFERENCE Phones FEATURES
: DUAL SWITCHABLE MICROPHONE AMPLIFIER INPUTS. GAIN PROGRAMMABLE: 15 dB RANGE, 1 dB STEP. LOUDSPEAKER AMPLIFIER AUXILIARY OUTPUT. ATTENUATION PROGRAMMABLE: 30 dB RANGE, 2 dB STEP. SEPARATE EARPIECE AMPLIFIER OUTPUT. ATTENUATION PROGRAMMABLE: 15 dB RANGE, 1 dB STEP AUXILIARY SWITCHABLE EXTERNAL RING INPUT (EAIN). TRANSIENT SUPRESSION SIGNAL DURING POWER ON. INTERNAL PROGRAMMABLE SIDETONE CIRCUIT. ATTENUATION PROGRAMMABLE: 15 dB RANGE, 1 dB STEP. INTERNAL RING OR TONE GENERATOR INCLUDING DTMF TONES, SINEWAVE OR SQUAREWAVE WAVEFORMS.
STMicroelectronics
