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參數(shù)資料
| 型號(hào)： | LXT350PE |
| 英文描述： | PCM TRANSCEIVER|SINGLE|CEPT PCM-30/E-1|CMOS|LDCC|28PIN|PLASTIC |
| 中文描述： | 的PCM收發(fā)器|單|優(yōu)稅PCM-30/E-1 |的CMOS | LDCC | 28腳|塑料 |
| 文件頁(yè)數(shù)： | 36/50頁(yè) |
| 文件大小： | 1197K |
| 代理商： | LXT350PE |
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LXT350
—
T1/E1 Short Haul Transceiver with Crystal-less Jitter Attenuation
36
Datasheet
4.4.2
Host Mode Application
Figure 13
shows a typical application using the LXT350 in Host mode. See
Table 18
through
Table
19
to select the transformers (T1 and T2), resistors (Rt and R
L
) and capacitors (C
L
) needed for this
application.
Note:
If the application includes surge protection, such as a varistor or sidactor on the TTIP/TRING lines,
it may also require reducing the value of the capacitor C
L
, or eliminating it completely. Excessive
capacitance at C
L
will distort the transmitted signals.
Figure 12. Typical T1/E1 LXT350 Hardware Mode Application
MCLK
TRSTE
MODE
TAOS
LLOOP
RLOOP
EC1
EC2
EC3
JASEL
TTIP
TRING
RTIP
RRING
TCLK
TPOS
TNEG
TCLK
TPOS
TNEG
RCLK
RPOS
RNEG
RCLK
RPOS
RNEG
T1/E1
Framer
From
CMOS
Control
Logic
2.048 MHz/
1.544 MHz
LXT350
Rt
1
C
L
1
Rt
1
R
L
2
1:1
TVCC
VCC
TGND
GND
68
μ
F
0.1
μ
F
NLOOP
LOS
1:2
1
NOTES:
1. See
Table 18
and
Table 19
for C
L
, Rt and Transformer selection.
2. R
L
= 100
for T1
R
L
= 120
for E1/120
twisted pair
R
L
= 75
for E1/75
coax
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