XRT83SL38ES Exar, XRT83SL38ES Datasheet - Page 37

• Manufacturer Part Number: XRT83SL38ES
• Description: Peripheral Drivers & Components - PCIs 8 CHT1/E1LIUSH
• Manufacturer: Exar

Specifications of XRT83SL38ES

• Product Category: Peripheral Drivers & Components - PCIs
• Rohs: yes

REV. 1.0.2
diagram for T1 (100Ω) in the external termination mode.
the external termination mode.
Table 11
REDUNDANCY APPLICATIONS
Telecommunication system design requires signal integrity and reliability. When a T1/E1 primary line card has
a failure, it must be swapped with a backup line card while maintaining connectivity to a backplane without
losing data. System designers can achieve this by implementing common redundancy schemes with the
XRT83SL38 Line Interface Unit (LIU). The XRT83SL38 offers features that are tailored to redundancy
applications while reducing the number of components and providing system designers with solid reference
designs. These features allow system designers to implement redundancy applications that ensure reliability.
The Internal Impedance mode eliminates the need for external relays when using the 1:1 and 1+1 redundancy
schemes.
100 Ω
110 Ω
120 Ω
75 Ω
T1
E1
E1
J1
summarizes the transmit terminations.
OCTAL T1/E1/J1 SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
TERSEL1
0
0
0
0
0
0
1
1
1
1
1
1
TERSEL0
0
0
0
1
1
1
0
0
0
1
1
1
T
ABLE
0=
1=
T
TRATIO
ABLE
TXTSEL
EXTERNAL
INTERNAL
10: T
0
1
0
0
1
0
0
1
0
0
1
0
0
1
11: T
RANSMIT
RANSMIT
TRATIO
35
T
0
1
x
0
1
x
0
1
x
0
1
x
ERMINATION
Figure 12
T
ERMINATIONS
T
CONTROL
URNS
13.75 Ω
SET BY
R
12.5 Ω
9.4 Ω
15 Ω
BITS
1:2.45
int
0 Ω
0 Ω
0 Ω
0 Ω
0 Ω
0 Ω
0 Ω
0 Ω
is a simplified block diagram for E1 (75Ω) in
1:2
C
Ω
R
ONTROL
ATIO
n, R
2.45
2.45
2.45
2.45
ext
n
2
2
2
2
2
2
2
2
,
AND
SETTINGS
C
ext ARE SUGGESTED
R
3.1 Ω
3.1 Ω
3.1 Ω
3.1 Ω
6.2 Ω
9.1 Ω
6.2 Ω
9.1 Ω
XRT83SL38
ext
0 Ω
0 Ω
0 Ω
0 Ω
Ω
0.68 μ F
0.68 μ F
0.68 μ F
0.68 μ F
C
0
0
0
0
0
0
0
0
ext