GENERAL DESCRIPTION
The UT62W256B is a 262,144-bit low power CMOS static random access memory organized as 32,768 words by 8 bits. It is fabricated using high performance, high reliability CMOS technology with 6T cell. its standby current is stable within the range of operating temperature.
The UT62W256B is designed for high-speed and low power application. It is particularly well suited for battery back-up nonvolatile memory application.
The UT62W256B operates with wide range power supply and all inputs and outputs are fully TTL compatible

FEATURES
■ Access time : 35ns (VCC≧4.5V)
                          70ns (VCC≧ 2.7V)
■ Low power consumption:
   Operating : 30/20 mA (max.) (VCC≦3.6V)
                      45/30 mA (max.) (VCC≦5.5V)
   Standby : 1uA (typical) L-version
                    0.5uA (typical) LL-version
■ Wide Range power supply: 2.7V~5.5V
■ All inputs and outputs are TTL compatible
■ Fully static operation
■ Three state outputs
■ Six transistors memory cell
■ Data retention voltage : 1.5V (min.)
■ Package : 28-pin 600 mil PDIP
                    28-pin 330 mil SOP
                    28-pin 8x13.4mm STSOP