lxt351 Intel Corporation, lxt351 Datasheet - Page 29
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lxt351
Manufacturer Part Number
lxt351
Description
T1/e1 Short Haul Transceiver With Crystal-less Jitter Attenuation
Manufacturer
Intel Corporation
Datasheet
1.LXT351.pdf
(46 pages)
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4.0
4.1
4.2
4.3
4.4
Datasheet
Table 15. E1 Transmit Return Loss Requirements
Application Information
Transmit Return Loss
Table 15
specification is a Swiss Telecommunications Ministry specification.
Table 16
Transformer Data
Specifications for transformers are listed in
with the LXT351 are specified in
Application Circuit
Figure 11
Line Protection
On the receive side, 1 k series resistors protect the receiver against current surges coupled into
the device. Due to the high receiver impedance (40 k typical) the resistors do not affect the
receiver sensitivity. On the transmit side, Schottky diodes D1-D4 protect the output driver. While
not mandatory for normal operation, these protection elements are strongly recommended to
improve the design robustness
Frequency Band
2048 - 3072 kHz
102-2048 kHz
51-102 kHz
T1/E1 Short Haul Transceiver with Crystal-less Jitter Attenuation — LXT351
shows the specification for transmit return loss in E1 applications. The G.703/CH PTT
and
shows a typical LXT351 application.
Table 17
show the transmit return loss values for E1 and T1 applications.
ETS 300 166
6 dB
8 dB
8 dB
Return Loss
Table
19.
G.703/CH PTT
Table
14 dB
10 dB
8 dB
18. A list of transformers recommended for use
29
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