Zero Bus Turnaround (ZBT) is a synchronous SRAM architecture
optimized for networking and telecommunications applications.
It can increase the internal bandwidth of a switch fabric
when compared to standard SyncBurst SRAM. ZBT SRAMs became
the de facto industry standard for these applications when
they were introduced, much like Synchronous Burst SRAMs are
the industry standard in the PC cache market.
The ZBT architecture is optimized for switching and other
applications with highly random READs and WRITEs. ZBT SRAMs
eliminate all idle cycles when turning the data bus around
from a WRITE operation to a READ operation (or vice versa).
This feature results in dramatic performance improvements
in systems that have such traffic patterns, i.e., frequent
and random read and write access to the SRAM.
