XR-T5793 Datasheet, PDF (5/16 Pages) Exar Corporation – Quad E1 Line Interface Unit

XR-T5793
PIN DESCRIPTION (CONT’D)
PLCC
Pin #
27
SQFP
Pin #
21
Symbol
LPMOD4
28
22
LPMOD3
29
23
RXIN4
30
24
LOS4
31
25
LOS3
32
26
RXIN3
33
27
NC
34
28
NC
35
29, 30
RGND
36
31
RGND
37
32
NC
38
33
RXIN2
39
34
LOS1
40
35
LOS2
41
36
RXIN1
42
37
LPMOD2
43
38
LPMOD1
-
39, 40
NC
44
41,42
RV_SS
45
43
RXNEG1
46
44
RXPOS1
47
45
RXNEG2
48
46
RXPOS2
49
47
V_SS
50
48
E1/T1-
Type
I
I
I
O
O
I
GND
GND
I
O
O
I
I
I
NC
V_SS
O
O
O
O
V_SS
I
Description
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
actualloopback 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.
No Connect.
No Connect.
Receive Ground.
Receive Ground.
No Connect.
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.
Loop Mode 1. If driven high the loopback mode of channel 1 will be set to re-
mote loop. Otherwise the loopback mode will remain at local loop. The
actual loopback will be activated when the LOOPEN1 is asserted.
No Connect.
Receive V_SS. -5V ($5%).
Receiver 1 Negative Data Out. Negative data output in NRZ or RZ format for
receiver 1.
Receiver 1 Positive Data Out. Positive data output in NRZ or RZ format for
receiver 1.
Receiver 2 Negative Data Out. Negative data output in NRZ or RZ format for
receiver 2.
Receiver 2 Positive Data Out. Positive data output in NRZ or RZ format for
receiver 2.
Digital V_SS. -5V ($5%).
E1/T1- Selection. Apply logic one to select the receive data threshold
appropriate for E1 operation. Connect to ground to select the T1 data
threshold.
Rev. 2.00
5