LXD971L Intel, LXD971L Datasheet - Page 6

• Manufacturer Part Number: LXD971L
• Manufacturer: Intel

Specifications of LXD971L

• Lead Free Status / RoHS Status: Not Compliant

LXT38x LIU
Application Note
249464, Revision 2.0
10 August 2007
2.0
2.1
Figure 1
2.1.1
1+1 Protection without Relays Using Cortina Systems
1+1 Implementation
Architecture
Figure 1
redundancy protection. This approach is common in rack based systems where several
boards share a common backplane. The primary and back-up boards are identical in
function and have access to the same data and control signals. A separate Line Interface
Card (LIC) houses the shared connectors and passive interface components between
primary and back-up boards. This LIC approach reduces the system cost by reducing the
number of total system components through avoiding duplication. It also offers a simple
mechanism for supporting different connector and line impedance options. An
independent control board supervises the system operation and selects the primary or
back-up board for use. Other boards may also exist depending on system functionality.
In a redundancy protection application it is essential that the board in standby mode does
not alter the T1/E1/J1 signal from its design standard. Performance requirements such as
pulse shape and return loss must still be met.
The LXT38x LIU series of T1/E1/J1 LIUs include several features that ease the design of
redundancy protection systems. These features guarantee excellent analog performance
and minimize switching errors and bit errors.
Redundancy Protection
LXT38x T1/E1/J1 LIU Family
The LXT38x LIU family of 3.3 V T1/E1/J1 LIUs is comprised of the following members:
• LXT380 LIU: Octal E1 analog front-end with clock and data recovery and hardware or
• LXT381 LIU: Octal E1 analog front-end with data recovery mode only. Only hardware
software modes.
mode is available.
represents the typical architecture found in most T1/E1/J1 systems with
®
LXT380/1/4/6/8 Hitless Protection Switching
2.0 1+1 Implementation
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