pef22504 Infineon Technologies Corporation, pef22504 Datasheet - Page 87

• Manufacturer Part Number: pef22504
• Description: Quad E1/t1/j1 Line Interface Component For Long- And Short-haul Applications Pef 22504 E, Pef 22504 Ht, Version 2.1
• Manufacturer: Infineon Technologies Corporation

Figure 26
The required resistor and transformer values are given in
Table 16
Parameters of
external components
R
R
R
t
1) This includes all parasitic effects caused by circuit board design.
3.7.3.4
In general for redundancy applications (“protection switching”) one channel is active while the other is in stand-by
mode.
Switching between active and stand-by mode can be done by software and by hardware.
Software controlled switching can be done on the line side in transmit direction by using the register bit XPM2.XLT.
Combined hardware and software controlled switching can be done on the line side in transmit direction by a
hardware signal if a Multi Function Port is configured as tristate input XLT. It is proposed that the Multi Function
Port XPA be used for XLT or XLT input respectively, if this is the case then the PC1.XPC1(3:0) register bits must
be programed, see
(PC1.XPC1 = ´1110
Data Sheet
2
E
3
SER
:
( 1 %)
( 1 %)
t
1
Monitoring Application using RLM (shown for one line)
External Component Recommendations for Monitoring Applications using RLM
Redundancy Application using RLM
Table
b
´) and for the other channel as high active (PC1.XPC1 = ´1000
1)
E1/T1/J1
Transmit
E1/T1/J1
Receive
Line
Line
R
75 Ohm
75
330
See
1 :1
3
34. For one channel the Multi Function Port XPA must be programmed as low active
Chapter 3.9.1
Line Impedance Z
E1
120 Ohm
120
510
1 :1
R
R
R
R
SER
SER
SER
SER
R
R
87
E
0
E
Table
XL1
XL2
RL1
RL2
XL1
XL2
RL1
RL2
16.
T1
100 Ohm
100
430
1 : 1
monitor
channel
receiver
channel
QFALC_monitor_RLM
RDO
RSIG
RDO
RSIG
XDI
XDI
Line Impedance Z
b
´), so that no external inverter
Functional Description
J1
110 Ohm
110
470
1 : 1
Rev. 1.3, 2006-01-25
QuadLIU
PEF 22504
0
TM