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New bus buffers from NXP Semiconductors overcome the previous system capacitance limitation of 400pF. These new bus buffers allow designers more freedom in their design to expand the use of the I2C or SMBus:
* More I2C devices than the 400pF maximum allowed by the I2C specification
* Long bus wiring in point-to-point or multi-point applications
* Different operating supply voltages or logic voltage levels within one system
* Opto-isolation for safety or due to difference in ground plane
* Isolating a section of a system that has lost its power supply
* Insertion of unpowered cards into an active I2C bus on multi-point backplanes like those found in CompactPCI, VME, or AdvancedTCA systems
Nigel Goodwin said:I thought they were called 'a resistor' - why would you want anything else?.