MAS9191A Datasheet, PDF (1/36 Pages) Micro Analog systems – Single Chip AMPS/ETACS/NAMPS Audio/Data Processor

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
• 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
APPLICATIONS
• AMPS/ETACS Cellular phone
• NAMPS Cellular phone
BLOCK DIAGRAM
MIC
AMPLIFIER
ANTI -
A LI AS ING
GAIN
CONTRO L
LO WP ASS
FI LTER
HIGHPA SS
FI LTER
GAIN
GAIN
COMPRESSOR CONTROL _PRE-EMPHASIS CONTROL
LIMITER
LO WP ASS
FI LTER
GAIN
CONTRO L
LO WP ASS
FI LTER
GAIN
CONTROL ^LOWPASS
FI LTER
SCL
STB
SRxD
STxD
DTMF
Genera tor
Serial
Int erfac e
TX
Buffer
BCH
Coding
DCC
Conv ers ion
SIDETONE
BUZZER
SPEAKER
AMPLIFIER
AMPLIFIER
RX
Buffer
BCH
Decoding
AMPLIFIER
LO WPASS
FI LTER
GAIN
CONTRO L
LO WP ASS
FI LTER
Voting
EXPANDER
Framing
Manchester
coding
SI GNALL ING
TONE
GAIN
CONTRO L
LO WP ASS
FI LTER
AMPLIFIER
Frame
Decoding
SAT
SYS1 (NAMPS)
Generation
SAT
Detection
BA NDP ASS
COMPARATOR FILTER
SYS1 (NAMPS)
Manchester
Decoder
COMPARATOR
DPLL
BA NDP ASS
FILTER
DE-EMPHASI S
DTM F
Receiver
LO WP ASS
FI LTER
3
8-bit
DACs
2 Utility
Operational
Amplifiers
LO WP ASS
FI LTER
GAIN
CONTRO L
TX
XSTAL1
XSTAL2
RX
1