Alcatel MTK-40131 Datasheet And User Manual

Key features

Digitally programmed
transmission and signalling
characteristics meets
world-wide specification
requirements
Integrated ringing, sine or
trapezoid
Metering injection
Battery reversal
Tone generators for signalling
and test
Minimal external components
CODEC and SLIC functions for
2 lines
Low-cost POTS interface for
short range
Standard GCI interface

Fig. 1: Application Sketch / Block Diagram

Ordering Information
Part number
MTK-40131-C .MTC-20232PQ-C 44 pinPQFP
Includ
2x MTC-30132SO-C 28 pinSO
MTK-40131-I .MTC-20232PQ-I
Includ
2x MTC-30132SO-I

Applications

Advanced ISDN NT (NTplus)
Analog / Digital PABX
Cable Telephone systems
(set-top box)
Remote telephone access
systems
Fibre to the curb
Radio in the loop
Internet telephones
Package Code Temp
PQ44 0 to -70°C
SO28 0 to -70°C
44 pinPQFP PQ44 -40/+85°C
28 pinSO SO28 -40/+85°C
MTK-40131
SH POTS chipset
MTC-20232 CODSP
MTC-30132 SH LIC
Data Sheet and
User Manual
Rev. 1.31 - December 1998

General Description

The MTK-40131 chipset provides all
the functions necessary to connect ana-
log telephone sets or other analog ter-
minals (telefax, answering machines,
modems etc...) into digital communica-
tion systems. It provides an economical
solution for the traditional 'BORSHT'
functions found in central-office
exchanges, but optimised for short-
range communication (e.g. up to 500m
with 4 RENs attached). Virtually all sys-
tem-dependent parameters can be set
under software control, giving a hither-
to unprecedented flexibility to the sys-
tem integrator, as well as optimising the
system cost. The digital interface to the
SH POTS chipset uses the industry-stan-
dard "GCI"* interface. The system
architecture has been designed to offer
the most cost-effective solution for short-
haul systems, yet offers the full flexibility
required to meet world-wide analog
telephony standards. Suitable for
Q.552 applications.
The MTK-40131 chipset comprises three
devices (see fig 1.): A pair of high-volt-
age device, the Short-Haul Line Interface
Circuit (SH LIC) which provides the sig-
nal and power interface to the analog
lines (one per line) and a low-voltage
CMOS, DSP-based dual CODEC/con-
trol device (CODSP) which provides all
signal processing and control functions
for up to two lines.
(* The General Circuit Interface (GCI) is an interface specification,
developed jointly by Alcatel, Italtel, GPT and Siemens;
date March 1989; issue 1.0)