XRT5997 Datasheet, PDF (12/37 Pages) Exar Corporation – Seven-Channel E1 Line Interface Unit

XRT5997
PIN DESCRIPTION (CONT'D)
Pin#
Symbol
Type
69
RTIP7
I
70
RRing6
I
71
RTIP6
I
72
AGND
73
DGND3
74
RxNEG6
O
75
RxPOS6
O
76
LOS6
O
77
TxPOS6
I
Description
Receiver 7 Positive Bipolar Input:
The Receive Section of Channel 7 uses this input pin, along with RRing7 to
receive the bipolar line signal from the “Remote E1 Terminal”.
Receiver 6 Negative Bipolar Input:
The Receive Section of Channel 6 uses this input pin, along with RTIP6 to
receive the bipolar line signal from the “Remote E1 Terminal”.
Receiver 6 Positive Bipolar Input:
The Receive Section of Channel 6 uses this input pin, along with RRing6 to
receive the bipolar line signal from the “Remote E1 Terminal”.
Analog Ground. Receiver 4, 6, 7.
Digital Ground. Digital Circuitry.
Receiver 6 Negative Data Out:
This output pin will pulse “high” whenever Channel 6, within the XRT5997
device has received a “Negative Polarity” pulse, in the incoming line signal,
at RTIP6/RRing6 inputs.
Receiver 6 Positive Data Out:
This output pin will pulse “high” whenever Channel 6, within the XRT5997
device has received a “Positive Polarity” pulse, in the incoming line signal, at
RTIP6/RRing6 inputs.
Receiver 6 Loss of Signal:
This output pin toggles “high” if Channel 6, within the XRT5997 device has
detected a “Loss of Signal” condition in the incoming line signal.
Transmitter - Positive Data Input – Channel 6:
The exact signal that should be applied to this input pin depends upon
whether the user intends to operate the “Transmit Section” (of Channel 6) in
the “Clocked” or “Clockless” Mode.
Clocked Mode:
The Terminal Equipment should apply bit-wide NRZ pulses on this input pin,
whenever the Terminal Equipment needs to transmit a “positive-polarity”
pulse onto the line via TTIP6 and TRing6 output pins. The XRT5997
device will sample this input pin upon the falling edge of the TClk6 signal.
Clockless Mode:
The Terminal Equipment should apply RZ pulses to this input pin, anytime the
Terminal Equipment needs to transmit a “positive-polarity” pulse onto the line
via TTIP6 and TRing6 output pins.
Rev. 1.0.0
12