一、FEATURES 1.Fast access time : 55/70ns 2.Low power consumption:    Operating current : 45/30mA (TYP.)    Standby current : 10μA (TYP.) LL-version 3.Single 2.7V ~ 3.6V power supply 4.All inputs and outputs TTL compatible 5.Fully static operation 6.Tri-state output 7.Data byte control :    (i) BYTE# fixed to VCC         LB# controlled DQ0 ~ DQ7         UB# controlled DQ8 ~ DQ15   (ii) BYTE# fixed to VSS         DQ15 used as address pin, while         DQ8~DQ14 pins not used 8.Data retention voltage : 1.2V (MIN.) 9.Green package available 10.Package : 48-pin 12mm x 20mm TSOP I