pef2256e Infineon Technologies Corporation, pef2256e Datasheet - Page 67
pef2256e
Manufacturer Part Number
pef2256e
Description
E1/t1/j1 Framer And Line Interface Component For Long- And Short-haul Applications
Manufacturer
Infineon Technologies Corporation
Datasheet
1.PEF2256E.pdf
(518 pages)
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Figure 17
Table 13
Parameter
1)
Using the receive line monitor mode and the hardware tristate function of transmit lines
XL1/2, the FALC
and transmission line. In these kind of applications both devices are working in parallel
for redundancy purpose (see
one must be switched into transmit line tristate mode. If both channels are configured
identically and supplied with the same system data and clocks, the transmit path can be
switched from one channel to the other without causing a synchronization loss at the
remote end. Due to the use of the receive line monitor mode, this setup is limited to short
User’s Manual
Hardware Description
2
1
2
3
This includes all parasitic effects caused by circuit board design.
:
1
1)
Receive Line Monitoring (E1)
External Component Recommendations (Monitoring)
®
56 now supports applications connecting two devices to one receive
Figure
LIM0.RTRS Characteristic Impedance
0
1
0
1
x
B
B
B
B
B
18). While one of them is driving the line, the other
67
75 Ω
75 Ω ± 1 %
120 Ω ± 1 %
75 Ω ± 1 %
120 Ω ± 1 %
330 Ω ± 1 %
1 : 1
Functional Description E1
120 Ω
120 Ω ± 1 %
-
120 Ω ± 1 %
-
510 Ω ± 1 %
1 : 1
DS1.1, 2003-10-23
PEF 2256 H/E
FALC
®
56
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