HM6264ASP-12 Datasheet - Hitachi -> Renesas Electronics

Features
• Low-power standby
    — 0.1 mW (typ)
    — 10 µW (typ) L-/LL-version
• Low power operation
    — 15 mW/MHz (typ)
• Fast access time
    — l00/120/150 ns (max)
• Single +5 V supply
• Completely static memory
    — No clock or timing strobe required
• Equal access and cycle time
• Common data input and output, three-state output
• Directly TTL compatible
    — All inputs and outputs
• Battery back up operation capability (L-/LL-version)