GS8662S08E-250 Datasheet, GSI Technology

* 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 SA NC R/W NW0
  –NW1 BW0
  –BW1 BW0
  –BW3 K C TMS TDI TCK TDO VREF ZQ K C DOFF LD CQ CQ Dn Qn VDD VDDQ VSS Description Synchronous Address Inputs No Connect Read/Write Contol Pin Synchronous Nybbl.