MAS9191A

www.DataSheet4U.com DA9191A.000 July 31, 1997 MAS9191A Single Chip AMPS/ETACS/NAMPS Audio/Data Processor DESCRIPTION The MAS9191A is a high integration BeCMOS IC for implementing the audio and data signal processing in AMPS, ETACS or NAMPS cellular phones. The power consumption of the device is very low due to several automatic and software controlled power down modes as well as the low power characteristics of the BeCMOS process. DTMF receiver is also included to enable answering machine functions for the cellular phone. Only a minimal number of external components are needed to meet typical baseband requirements. Single chip solution for all audio and data processing Low power consumption with several power down modes SAT decoding and transponding circuitry Simple 4-wire serial interface FEATURES Voice signal processing including compressor, expander, de-emphasis and pre-emphasis filters and digital gain adjustments DTMF and ST generators and DTMF receiver Busy/Idle extraction and arbitration with TX block, voting, BCH, data buffering and framing, DCC coding with hardware Three 8-bit DACs and two operational amplifiers On-chip oscillator with clock output for uP 3.3V or 5V operation with low power consumption(RX block at 2mA/3.3V) 64-pin TQFP package, -40..85oC operation range APPLICATIONS AMPS/ETACS Cellular phone NAMPS Cellular phone BLOCK DIAGRAM AMPLIFIER ANTI ALIASING GAIN CONTROL LOWPASS FI LTER HIGHPASS FI LTER COMPRESSOR GAIN CONTROL ...