 Single 4.5V~5.5V power supply

 Small stand-by current: 0.6μA (5.0V, typical)

 No clocks, No refresh

 All inputs and outputs are TTL compatible.

 Easy memory expansion by CS1# and CS2

 Common Data I/O

 Three-state outputs: OR-tie Capability

 OE# prevents data contention on the I/O bus