GENERAL DESCRIPTION
The UT62257C 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.
The UT62257C is designed for high-speed and low power application. With 2 chip controls ( CE1、 CE2 ), it is easy to design memory systems with POWER-DOWN and capacity expansion in the application circuits. It is particularly well suited for battery back-up nonvolatile memory application.
The UT62257C operates from a single 5V power supply and all inputs and outputs are fully TTL compatible.

FEATURES
■ Access time : 35/70ns (max.)
■ Low power consumption:
    Operating : 40 mA (typical.)
    Standby : 3mA (typical) normal
                    2uA (typical) L-version
                    1uA (typical) LL-version
■ Single 5V power supply
■ All inputs and outputs are TTL compatible
■ Fully static operation
■ Three state outputs
■ Data retention voltage : 2V (min.)
■ Package : 28-pin 600 mil PDIP
                    28-pin 330 mil SOP
                    28-pin 8mmx13.4mm STSOP