Description
The Hitachi HM628512CI is a 4-Mbit static RAM organized 512-kword × 8-bit.  HM628512CI Series has realized higher density, higher performance and low power consumption by employing CMOS process technology (6-transistor memory cell).  The HM628512CI Series offers low power standby power dissipation; therefore, it is suitable for battery backup systems.  It has packaged in 32-pin SOP, 32-pin TSOP II and 32-pin DIP.

Features
•  Single 5 V supply
•  Access time:  70 ns (max)
•  Power dissipation
 Active:  10 mW/MHz (typ)
 Standby:  4 µW (typ)
•  Completely static memory. No clock or timing strobe required
•  Equal access and cycle times
•  Common data input and output: Three state output
•  Directly TTL compatible: All inputs and outputs
•  Battery backup operation
•  Operating temperature:  –40 to +85˚C