Description
The Hitachi HM628512B is a 4-Mbit static RAM organized 512-kword ´ 8-bit. It realizes higher density,
higher performance and low power consumption by employing 0.35 mm Hi-CMOS process technology. The
device, packaged in a 525-mil SOP (foot print pitch width) or 400-mil TSOP TYPE II or 600-mil plastic DIP,
is available for high density mounting. The HM628512B is suitable for battery backup system.
Features
·  Single 5 V supply
·  Access time: 55/70 ns (max)
·  Power dissipation
¾ Active: 50 mW/MHz (typ)
¾ Standby: 10 mW (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

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