DESCRIPTION
The M5M5408B is a family of 4-Mbit static RAMs organized as 524,288-words by 8-bit, fabricated by Mitsubishis high performance 0.25µm CMOS technology.
The M5M5408B is suitable for memory applications where a simple interfacing, battery operating and battery backup are the important design objectives.
M5M5408B is packaged in 32-pin plastic SOP, 32-pin plastic TSOP. Two types of TSOPs are available, M5M5408BTP (normal-lead-bend TSOP), M5M5408BRT (reverse-lead-bend TSOP). These two types TSOPs are suitable for a  surface mounting on double-sided printed circuit boards.

FEATURES
• Single +5V power supply
• Small stand-by current: 0.4µA(3V,ty p.)
• No clocks, No refresh
• Data retention supply voltage=2.0V to 5.5V
• All inputs and outputs are TTL compatible.
• Easy memory expansion by S#
• Common Data I/O
• Three-state outputs: OR-tie capability
• OE# prevents data contention in the I/O bus
• Process technology: 0.25µm CMOS
• Package:
   M5M5408BFP: 32 pin 525 mil SOP
   M5M5408BTP/RT: 32 pin 400 mil TSOP(ll)