ODT has the following advantages:
- Improves signal integrity by having termination closer to the device inputs
- Simplifies board routing
- Saves board space by eliminating external resistors
- Reduces cost involved in using external termination resistors
For ODT-enabled QDRII+ and DDRII+ SRAMs, ODT is offered on the following input signals:
- Input clocks (K and Kb clocks)
- Data input signals
- Control signals (Byte Write Select signals)
The figure below shows the ODT implementation for Cypress QDRII+/DDRII+ SRAMs:
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Clicking on the link below provides a tool which enables calculation of the Idd current for desired frequency, total Power consumption and Junction temperature for Sync SRAMs
http://www.cypress.com/?docID=23984
Please refer to the respective product datasheets to get the Vdd voltage and Idd current used in the formula.