一、FEATURES 

1.Fast access time : 35/55/70ns
2. Low power consumption:
    Operating current : 12/10/7mA (TYP.)
    Standby current : 1mA (TYP.) LL-version、0.8mA (TYP.) SL-version
3. Single 2.7V ~ 5.5V power supply
4. All outputs TTL compatible
5. Fully static operation
6. Tri-state output
7. Data retention voltage : 1.5V (MIN.)
8. Green package available
9. Package : 32-pin 450mil SOP、32-pin 600mil PDIP、32-pin 8mm x 20mm TSOP I、
                     32-pin 8mm x 13.4mm sTSOP、36-ball 6mm x 8mm TFBGA