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MAS9191A Datasheet(PDF) 1 Page - Micro Analog systems |
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MAS9191A Datasheet(HTML) 1 Page - Micro Analog systems |
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1 / 36 page  1 DA9191A.000 July 31, 1997 MAS9191A Single Chip AMPS/ETACS/NAMPS Audio/Data Processor • 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 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. FEATURES APPLICATIONS • 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..85 oC operation range • AMPS/ETACS Cellular phone • NAMPS Cellular phone BLOCK DIAGRAM MIC Serial Interface TX Buffer DCC Conversion Framing RX Buffer DTMF Receiver Voting Manchester Decoder DPLL SCL STB SRxD STxD RX TX EXPANDER BANDPASS FILTER DE-EMPHASIS GAIN CONTROL COMPARATOR GAIN CONTROL COMPRESSOR PRE-EMPHASIS LIMITER LOWPASS FILTER Manchester coding BCH Coding SAT Generation Frame Decoding SAT Detection COMPARATOR DTMF Genera tor SIDETONE SPEAKER 3 8-bit DACs 2 Utility Operational Amplifiers AMPLIFIER AMPLIFIER ANTI - ALIASING BUZZER AMPLIFIER XSTAL1 XSTAL2 LOWPASS FILTER LOWPASS FILTER LOWPASS FILTER GAIN CONTROL GAIN CONTROL GAIN CONTROL GAIN CONTROL GAIN CONTROL AMPLIFIER AMPLIFIER LOWPASS FILTER LOWPASS FILTER LOWPASS FILTER LOWPASS FILTER GAIN CONTROL HIGHPASS FILTER LOWPASS FILTER BCH Decoding SIGNALLING TONE BANDPASS FILTER SYS1 (NAMPS) SYS1 (NAMPS) |
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