®
MH89101
Passive Line Termination Circuit
Advance Information
Features
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Passive Line Termination (PLT) for MT8910
DSLIC
High precision trimmed resistors
Excellent resistor matching required to meet
longitudinal balance as specified in ANSI-
T1.601
Compact SIL package
ISSUE 1
August 1991
Ordering Information
MH89101
6 Pin SIL Package
0°C to +70°C
Description
The MH89101 is a thick film hybrid device which is
used in conjunction with the MT8910 to perform two
to four wire conversion and analog signal
conditioning on the received 2B1Q signal.
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Applications
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Pair gain system
ISDN NT1 and NT2 interfaces
Digital multiplexers and concentrators
ISDN U-interface terminals
The signal conditioning is necessary to enable the
DSLIC to interface to the Digital Subscriber Line as
defined in ANSI T1.601-1988. The precanceller
block will perform two to four wire conversion and
provide adequate isolation between transmit and
receive paths.
The small size and the precise resistor matching on
the hybrid makes it suitable for line card or terminals
which use the MT8910 2B1Q U-Interface
Transceiver.
TXin +
XFM +
RXout -
Compensator
Circuit
Precanceller
RXout +
XFM -
TXin -
Figure 1 - Functional Block Diagram
9-29
MITEL [ MITEL NETWORKS CORPORATION ]
