参数资料
型号: PEF3452
厂商: INFINEON TECHNOLOGIES AG
英文描述: Line Interface Unit for DS3, STS 1 and E3
中文描述: 线路接口单元的DS3中,STS 1和E3
文件页数: 39/71页
文件大小: 1372K
代理商: PEF3452
PEF 3452
TE3-LIU V1.3
Interface Description
Preliminary Data Sheet
29
2001-12-05
PRELIMINARY
4.2
Transmitter
The serial bit stream is then processed by the transmitter which has the following
functions:
generation of AMI, B3ZS (DS3/STS-1) or HDB3 (E3) coded signals
all-ones generation (alarm indication signal)
4.2.1
Transmit Line Interface
The received data stream on pins XDIP (single rail data) or XDIP/XDIN (dual rail data) is
converted into a ternary signal which is output on pins XL1 and XL2. In E3 mode the
HDB3 and AMI line code are supported, in DS3/STS-1 mode the B3ZS and AMI is
supported.
Figure 13
Transmitter Configuration
The external components are the same for DS3, STS-1 and E3 applications. Transmit
return loss requirements for E3 defined in ETS 300 166 are fulfilled. Pulse mask
Table 11
Parameter
External Component Values for Transmitter
Characteristic Line Impedance
[
]
DS3
STS-1
75
37.5
1)
37
2)
1 : 1
E3
R
1
(
±
1
%
)
[
]
C
p
[
pF
]
t
2
:
t
1
1)
This value refers to an ideal transformer without any parasitics. Any transformer resistance or other parasitic
resistances have to be taken into account when calculating the final value for the output serial resistors.
2)
This value includes all parasitic capacitances on the secondary side of the transformer.
TE3-LIU
TM
XL1
R1
XL2
t1 : t2
R1
C
P
F0079
75
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