LXD971L Intel, LXD971L Datasheet - Page 27

• 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
Figure 22
1+1 Protection without Relays Using Cortina Systems
Block Diagram of Redundancy Circuit with Back-up Supply Voltage Removed
Features
Features for this solution include the following:
Powering Down the Back-up
A powered down LIU will siphon power from a 1+1 protection interface if the power down
sequence is not done correctly. There is a way to prevent this with the LXT38x LIU family
by using the following sequence:
Following this procedure assures that the active LIU remains unaffected.
1. Ground the Output Enable (OE) pin.
2. Remove VCC and TVCC from the LIU on the board being powered down.
• Highly integrated octal LIU with small footprint
• Removing sixteen double pole relays while retaining octal redundancy
• Preserving electrical performance without frame hits during switchover
• Saving power by removing supply voltage to the backup board
• Primary and back-up boards are independent
®
LXT380/1/4/6/8 Hitless Protection Switching
4.0 Frequently Asked Questions
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