How to insert and remove (hot-swap) a daughter card from a backplane without powering down the system power

Many high-speed data and redundancy systems are required to run continuously without being powered down. If special considerations are not taken, the device can be damaged. To ensure the input current does not exceed its limit and damage the device, a current limiting resistor can be used. Below are examples of the most common termination topologies using a series current limiting resistor. Though it's not necessary, but if board space allows, some of the examples have an optional 100pf capacitor which assists with the integrity of the rise time. It is also recommended that the current limiting resistor be as close to the receiver as possible. Refer to application note AN-834 for more details. For other questions not addressed by the Knowledge Base, please submit a technical support request.

 

 

 

 

 

Documents

Title Other Languages Type Format File Size Date
Application Notes & White Papers
AN-834 Hot-Swap Recommendations Application Note PDF 67 KB May 5, 2014