ISO
2
-CMOS
MT91L60/61
3 Volt Multi-Featured Codec (MFC)
Advance Information
Features
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Single 2.7-3.6 volt supply operation
MT91L61 version features a delayed framing
pulse in SSI and ST-BUS modes to facilitate
cascaded devices
Programmable
µ-Law/A-Law
Codec and Filters
Programmable ITU-T (G.711)/sign-magnitude
coding
Programmable transmit, receive and side-tone
gains
Fully differential interface to handset
transducers - including 300 ohm receiver driver
Flexible digital interface including ST-BUS/SSI
Serial microport
Low power operation
ITU-T G.714 compliant
Multiple power down modes
MT91L61AE
MT91L60AE
MT91L61AS
MT91L60AS
MT91L61AN
MT91L60AN
DS5224
ISSUE 3
August 1999
Ordering Information
24 Pin Plastic DIP (600 mil)
24 Pin Plastic DIP (600 mil)
24 Pin SOIC
20 Pin SOIC
24 Pin SSOP
20 Pin SSOP
-40°C to +85°C
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Description
The
MT91L60/61
3V
Multi-featured
Codec
incorporates a built-in Filter/Codec, gain control and
programmable sidetone path as well as on-chip
anti-alias filters, reference voltage and bias source.
The device supports both ITU-T and sign- magnitude
A-Law and
µ-Law
requirements. The MT91L60/61 is
a true 3V device employing a fully differential
architecture to ensure wide dynamic range.
Complete telephony interfaces are provided for
connection to handset transducers. Internal register
access is provided through a serial microport
compatible
with
various
industry
standard
micro-controllers.
The MT91L60/61 is fabricated in Mitel's ISO
2
-CMOS
technology ensuring low power consumption and
high reliability.
Applications
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Battery operated equipment
Digital telephone sets
Cellular radio sets
Local area communications stations
Pair Gain Systems
Line cards
VSSD
VDD
VSSA
VBias
VRef
FILTER/CODEC GAIN
M-
ENCODER
DECODER
7dB
-7dB
Transducer
Interface
M+
HSPKR +
HSPKR -
Din
Dout
STB/F0i
CLOCKin
STBd/FOod
(MT91L61only)
Flexible
Digital
Interface
Timing
ST-BUS
C&D
Channels
Serial Microport
A/µ/IRQ
PWRST
IC
CS
DATA1
DATA2
SCLK
Figure 1 - Functional Block Diagram
1
MITEL [ MITEL NETWORKS CORPORATION ]
