* Simultaneous Read and Write SigmaSIO™ Interface
* JEDEC-standard pinout and package
* Dual Double Data Rate interface
* Byte Write controls sampled at d.

where alternating reads and writes are needed. On the other hand, Common I/O SRAMs like the SigmaCIO family are popular .

Table Symbol Description Type Comments SA Synchronous Address Inputs Input — R/W Read/Write Contol Pin Input Write Active Low; Read Active High NW0
  –NW1 Synchronous Nybble Writes Input Active Low x08 Version BW0
 .

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