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..85
o
C 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
PRE-EMPHASIS
GAIN
CONTROL
LIMITER
LOWPASS
FILTER
GAIN
CONTROL
LOWPASS
FILTER
GAIN
CONTROL
LOWPASS
FILTER
MIC
GAIN
CONTROL
LOWPASS
FILTER
AMPLIFIER
TX
DTMF
Genera tor
SCL
STB
SRxD
STxD
Serial
Interface
TX
Buffer
BCH
Coding
DCC
Conversion
Framing
Manchester
coding
SAT
Generation
SIGNALLING
TONE
XSTAL1
XSTAL2
SYS1 (NAMPS)
BUSY / I DLE
COMPARATOR
BANDPASS
FILTER
SAT
Detection
SYS1 (NAMPS)
3
8-bit
DACs
AMPLIFIER
RX
Buffer
BCH
Decoding
Voting
Frame
Decoding
Manchester
Decoder
COMPARATOR
SIDETONE
AMPLIFIER
2 Utility
Operational
Amplifiers
DPLL
BUZZER
AMPLIFIER
LO WPASS
FILTER
GAIN
CONTROL
LOWPASS
FILTER
EXPANDER
BANDPASS
FILTER
DE-EMPHASI S
DTMF
Receiver
LOWPASS
FI LTER
LOWPASS
FILTER
GAIN
CONTROL
SPEAKER
RX
1
MAS [ MICRO ANALOG SYSTEMS ]
