XR-T5793 Datasheet, PDF (2/16 Pages) Exar Corporation – Quad E1 Line Interface Unit

XR-T5793
BLOCK DIAGRAM
75Ω Unbalanced
(Without Transformer) _TIP
Impedance Selectable
Receivers. Return
Loss Exceeds G7.03.
0.1µF
75
Impedance
Selectable
Tristate
Drivers Return
Loss Exceeds
ETSI 300 166
120Ω Balanced
(or 100Ω )
TIP
RX INPUT
RING
PE-65834
TTI-7148
LOS Threshold Based on G.775
RXIN
100
or
120
E1/T1-
LOOPSEL (1.0)
LOOPEN
LPMOD
TIP
120Ω,100Ω or
75Ω Balanced
TX OUTPUT
RING
PE-65839
TTI-7149
75Ω Unbalanced TIP
(Without Transformer)
0.1µF
TXOUT
Rout¹
TXEN
R_OUT1
Level
Detector
Peak
Detector
Slice
Voltage
Driver
Transceiver 1
Transceiver 2
Transceiver 3
Transceiver 4
LOS
Slicer
L
o ^RXPOS
c
a _RXNEG
l
/
R
e
m
o
t
e
L _TXPOS
o
o
TXNEG
p ^TCLK
b
a
c
k
Note
1_{ROUT = 68Ω for 120Ω line impedance, ROUT = 62Ω for 100Ω line impedance, ROUT = 68Ω for 75Ω line impedance}
Figure 1. Block Diagram
Rev. 2.00
2