ST5090

ST5090 LOW VOLTAGE 14-BIT LINEAR CODEC WITH HIGH-PERFORMANCE AUDIO FRONT-END FEATURES: Complete CODEC and FILTER system including: 14 BIT LINEAR ANALOG TO DIGITAL AND DIGITAL TO ANALOG CONVERTERS. 8 BIT COMPANDED ANALOG TO DIGITAL AND DIGITAL TO ANALOG CONVERTERS A-LAW OR µ-LAW. TRANSMIT AND RECEIVE BAND-PASS FILTERS ACTIVE ANTIALIAS NOISE FILTER. Phone Features: THREE SWITCHABLE MICROPHONE AMPLIFIER INPUTS. GAIN PROGRAMMABLE: 20 dB PREAMP. (+MUTE), 0 . . 22.5 dB AMPLIFIER, 1.5 dB STEPS. EARPIECE AUDIO OUTPUT. ATTENUATION PROGRAMMABLE: 0 . . 30 dB, 2 dB STEPS. EXTERNAL AUDIO OUTPUT. ATTENUATION PROGRAMMABLE: 0 . . 30 dB, 2 dB STEPS. TRANSIENT SUPRESSION SIGNAL DURING POWER ON AND DURING AMPLIFIER SWITCHING. INTERNAL PROGRAMMABLE SIDETONE CIRCUIT. ATTENUATION PROGRAMMABLE: 16 dB RANGE, 1 dB STEP. ROUTING POSSIBLE TO BOTH OUTPUTS. INTERNAL RING OR TONE GENERATOR INCLUDING DTMF TONES, SINEWAVE OR SQUAREWAVE WAVEFORMS. ATTENUATION PROGRAMMABLE: 27dB RANGE, 3dB STEP. THREE FREQUENCY RANGES: a) 3.9Hz . . . . 996Hz, 3.9Hz STEP b) 7.8Hz . . . . 1992Hz, 7.8Hz STEP c) 15.6Hz . . . . 3984Hz, 15.6Hz STEP PROGRAMMABLE PULSE WIDTH MODULATED BUZZER DRIVER OUTPUT. General Features: SINGLE 3.3V ±10% OR 5V ±10% SUPPLY SELECTABLE. EXTENDED TEMPERATURE RANGE OPERATION (*) -40°C to 85°C. 1.5 µW STANDBY POWER (TYP. AT 3V). 21 mW OPERATING POWER (TYP. AT 3V). CMOS COMPATIBLE DIGITAL INTERFACES. PROGRAMMABLE PCM AND CONTROL INTERFACE MICROWIRE COMPATIBLE. February 1996 TQFP44(10x10x1.4) SO28 ORDE...