®
ISO
2
-CMOS
MT9196
Integrated Digital Phone Circuit (IDPC)
Preliminary Information
Features
•
•
•
•
•
•
•
•
•
•
Programmable
µ-Law/A-Law
CODEC and
Filters
Programmable CCITT (G.711)/sign-magnitude
coding
Programmable transmit, receive and side-tone
gains
Digital DTMF and single tone generation
Fully differential interface to handset
transducers
Auxiliary analog interface
Interface to ST-BUS/SSI (compatible with GCI)
Serial microport control
Single 5 volt supply, low power operation
Anti-howl circuit for group listening
speakerphone applications
ISSUE 3
May 1995
Ordering Information
MT9196AE
28 Pin Plastic DIP
MT9196AP
28 Pin Plastic LCC
MT9196AS
28 Pin SOIC
-40°C to +85°C
Description
The MT9196 Integrated Digital Phone Circuit (IDPC)
is designed for use in digital phone products. The
device incorporates a built-in Filter/Codec, digital
gain pads, DTMF generator and tone ringer.
Complete telephony interfaces are provided for
connecting
to
handset
and
speakerphone
transducers. Internal register access is provided
through a serial microport compatible with various
industry standard micro-controllers.
The device is fabricated in Mitel's ISO
2
-CMOS
technology ensuring low power consumption and
high reliability.
Applications
•
•
•
Digital telephone sets
Wireless telephones
Local area communications stations
VSSD
VDD
VSSA
VSS SPKR
VBias
VRef
Tone Generator
Digital Gain &
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24dB
21/ -
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∆3.0dB
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Tx & Rx
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Filter/Codec Gain
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Encoder
7dB
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Decoder
-7dB
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AUXin
AUXout
MIC +
M-
M+
Transducer
Interface
HSPKR +
HSPKR -
Din
Timing
Dout
STB/F0i
CLOCKin
Serial Microport
XSTL2
IC
IRQ
CS
DATA1
DATA2
SCLK
Flexible
Digital
Interface
SPKR +
SPKR -
ST-BUS
C&D
Channels
WD
PWRST
Figure 1 - Functional Block Diagram
7-127
MITEL [ MITEL NETWORKS CORPORATION ]
