xrt5997 Exar Corporation, xrt5997 Datasheet - Page 5

• Manufacturer Part Number: xrt5997
• Description: Xrt5997 -seven Channel E1 Line Interface Unit
• Manufacturer: Exar Corporation

PIN DESCRIPTION (CONT'D)
Pin#
14
15
16
17
18
19
20
21
22
23
24
25
Rev. 1.0.0
Symbol
RRing3
TGND2
TGND3
TVDD2
TRing2
TRing3
TVDD3
TxClk3
AGND
RTIP3
TTIP2
TTIP3
Type
O
O
O
O
-
-
I
I
I
Description
Analog Ground - Receiver 1, 2, 3, 5.
Transmitter 2 Positive Bipolar Output:
Channel 2 within the XRT5997 device will use this pin, along with TRing2,
to transmit a bipolar line signal, via a 1:2 step-up transformer.
Positive Supply - (+3.3V ± 5%), Transmitters 2.
Transmitter 2 Negative Bipolar Output:
Channel 2 within the XRT5997 device will use this pin, along with TTIP2, to
transmit a bipolar line signal, via a 1:2 step-up transformer.
Digital Ground - Transmitters 2.
Transmitter 3 Negative Bipolar Output:
Channel 3 within the XRT5997 device will use this pin, along with TTIP3, to
transmit a bipolar line signal, via a 1:2 step-up transformer.
Positive Supply - (+3.3V ± 5%), Transmitters 3.
Transmitter 3 Positive Bipolar Output:
Channel 3 within the XRT5997 device will use this pin, along with TRing3,
to transmit a bipolar line signal, via a 1:2 step-up transformer.
Digital Ground - Transmitters 3.
Receiver 3 Positive Bipolar Input.
The Receive Section of Channel 4 uses this input pin, along with RRing3
to receive the bipolar line signal from the “Remote E1 Terminal”.
Receiver 3 Negative Bipolar Input.
The Receive Section of Channel 3 uses this input pin, along with RTIP3 to
receive the bipolar line signal from the “Remote E1 Terminal”.
Transmitter Clock Input – Channel 3:
If the user operates Channel 3 (within the XRT5997 device) in the “clocked”
mode, then the “Transmit Section” of the Channel 3 will use the falling edge
of this signal to sample the data at the TxPOS3 and TxNEG3 input pins.
Note: If the user operates the Channel 3 in the “clockless” mode, then the
Terminal Equipment should not apply a clock signal to this input pin.
5
XRT5997