XR-T5794 Datasheet, PDF (5/20 Pages) Exar Corporation – Quad E-1 Line Interface Unit

XR-T5794
PIN DESCRIPTION (CONT’D)
PLCC
Pin #
25
SQFP
Pin #
18
Symbol
RXNEG4
26
19, 20
RV_DD
27
21
LPMOD4
28
22
LPMOD3
29
23
RXIN4
30
24
LOS4
31
25
LOS3
32
26
RXIN3
33
27
MSEL0
34
28
MSEL1
35
29, 30
RGND
36
31
RGND
37
32
MSEL2
38
33
RXIN2
39
34
LOS1
40
35
LOS2
41
36
RXIN1
42
37
LPMOD2
Type
O
V_DD
I
I
I
O
O
I
I
I
GND
GND
I
I
O
O
I
I
Description
Receiver 4 Negative Data Out. Negative data output in NRZ or RZ format for
receiver 4.
Receive V_DD. +5V ($5%).
Loop Mode 4. If driven high the loopback mode of channel 4 will be set to re-
mote loop. Otherwise theloopback mode will remain at local loop. The
actual loopback will be activated when the LOOPEN4 is asserted.
Loop Mode 3. If driven high the loopback mode of channel 3 will be set to re-
mote loop. Otherwise the loopback mode will remain at local loop. The
actual loopback will be activated when the LOOPEN3 is asserted.
Receiver 4 Input. Receiver 4 bipolar input connected to coupling capacitor or
pulse transformer.
Receiver 4 Loss Of Signal. Asserted during LOS condition. Clear otherwise.
Receiver 3 Loss Of Signal. Asserted during LOS condition. Clear otherwise.
Receiver 3 Input. Receiver 3 bipolar input connected to coupling capacitor or
pulse transformer.
Monitor Channel Select 0. Select line, used to select a channel for monitoring
using the MOUT pin based on the following assignment:
MSEL2 MSEL1 MSEL0 SELECTS
0
0
0
0
0
1
0
1
1
0
1
0
1
1
1
1
0
Line 1 Receive
1
Line 2 Receive
0
Line 3 Receive
1
Line 4 Receive
0
Line 1 Transmit
1
Line 2 Transmit
0
Line 3 Transmit
1
Line 4 Transmit
Note
The monitoring is only done on the NRZ data output signals from the receiver or from the
transmitter line side.
Monitor Channel Select 1. See table above.
Receive Ground.
Receive Ground.
Monitor Channel Select 2. See table above.
Receiver 2 Input. Receiver 2 bipolar input connected to coupling capacitor or
pulse transformer.
Receiver 1 Loss Of Signal. Asserted during LOS condition. Clear otherwise.
Receiver 2 Loss Of Signal. Asserted during LOS condition. Clear otherwise.
Receiver 1 Input. Receiver 1 bipolar input connected to coupling capacitor or
pulse transformer.
Loop Mode 2. If driven high the loopback mode of channel 2 will be set to re-
mote loop. Otherwise the loopback mode will remain at local loop. The
actual loopback will be activated when the LOOPEN2 is asserted.
Rev. 2.01
5